Claims:WE CLAIM:
1. A composition comprising-
iv. Component-A, comprising- fatty acid ester, solvent, adhesive, stabilizing agent, corrosion inhibitor, emulsifier, dispersant, crosslinking agent and resin; and
v. Component-B, comprising- resin and solvent.
2. The composition as claimed in claim 1, wherein the fatty acid ester is having formula set forth as RR'C28H43O5COOH, wherein R' is CH3 or CH2OH and R is COOH or CHO.
3. The composition as claimed in claim 1, wherein the solvent of the Component-A is selected from a group comprising 2-butoxy ethanol, isopropanol alcohol, dichloromethane and combination thereof.
4. The composition as claimed in claim 2, wherein the solvent is combination of the 2-butoxy ethanol, the isopropanol alcohol and the dichloromethane in a ratio ranging from about 24:8:40 to 21:7:35.
5. The composition as claimed in claim 1, wherein the adhesive is solution of polyester alkyl ammonium salt.
6. The composition as claimed in claim 1, wherein the stabilizing agent is selected from a group comprising ethyl acetoacetate, hexyl acetoacetate and combination thereof.
7. The composition as claimed in claim 1, wherein the corrosion inhibitor is amine salt of an aromatic sulfonic acid.
8. The composition as claimed in claim 1, wherein the emulsifier is selected from a group comprising hexylene glycol, propylene glycol and combination thereof.
9. The composition as claimed in claim 1, wherein the dispersant is solution of a salt of unsaturated polyamine amides and acidic polyesters
10. The composition as claimed in claim 1, wherein the crosslinking agent is selected from a group comprising triethylamine, ammonium hydroxyl and combination thereof.
11. The composition as claimed in claim 1, wherein the resin of the Component-A is n-butylated urea resin.
12. The composition as claimed in claim 1, wherein the fatty acid ester is in an amount ranging from about 15 wt% to 25 wt%.
13. The composition as claimed in claim 1, wherein the adhesive is in an amount ranging from about 2 wt% to 3 wt%.
14. The composition as claimed in claim 1, wherein the stabilizing agent is in an amount ranging from about 0.2 wt% to 0.5 wt%.
15. The composition as claimed in claim 1, wherein the corrosion inhibitor is in an amount ranging from about 0.4 wt% to 1 wt%.
16. The composition as claimed in claim 1, wherein the emulsifier is in an amount ranging from about 2 wt% to 5 wt%.
17. The composition as claimed in claim 1, wherein the dispersant is in an amount ranging from about 0.5 wt% to 1 wt%.
18. The composition as claimed in claim 1, wherein the crosslinking agent is in an amount ranging from about 0.2 wt% to 0.5 wt%.
19. The composition as claimed in claim 1, wherein the resin of the Component-A is in an amount ranging from about 1 wt% to 2 wt%.
20. The composition as claimed in claim 1, wherein the resin of the Component-B is silicone modified polyester resin.
21. The composition as claimed in claim 1, wherein the solvent in the Component-B is selected from a group comprising p-xylene, m-xylene and combination thereof.
22. The composition as claimed in claim 1, wherein the resin of the Component-B is in an amount ranging from about 15wt% to 20 wt%.
23. The composition as claimed in claim 1, wherein the solvent of the Component-B is in an amount ranging from about 60 wt% to 65 wt%
24. The composition as claimed in claim 1, wherein the composition further comprises polishing agent, wherein the polishing agent comprises- wherein the polishing agent comprises- about 11.441 wt% of silicon, about 42.223 wt% of calcium, about 12.928 wt% of sulphur, about 22.917 wt% of iron, and about 10.491 wt% of manganese.
25. The composition as claimed in claim 24, wherein mixture of the Component-A and Component-B and the polishing agent is present in a ratio ranging from about 0.5:1 to 2:1.
26. The composition as claimed in claim 1, wherein the composition has specific gravity ranging from about 0.95 to 1.05.
27. The composition as claimed in claim 24, wherein the composition comprises- about 30 wt% to 48 wt% of silicon, about 16 wt% to 23 wt% of calcium, about 10 wt% to 16 wt% of sulphur, about 5 wt% to 11 wt% of barium, about 7 wt% to 26 wt% of iron and about 0.9 wt% to 6 wt% of manganese.
28. A method of preparing the composition as claimed in any one of claims 1 to 27, wherein the method comprises:
- preparing the Component-A;
- preparing the Component-B; and
- mixing the Component-A and the Component-B, optionally adding the polishing agent to obtain the composition.
29. The method as claimed in claim 28, wherein in the mixing, the Component-A and Component-B are mixed in a ratio ranging from about 10:1.5 to 10:2.
30. The method as claimed in claim 28, wherein the mixing the Component-A and the Component-B is carried out by stirring at a speed ranging from about 1200 rpm to 1500 rpm for a duration ranging from about 15 minutes to 20 minutes.
31. The method as claimed in claim 28, wherein mixture of the Component-A and the Component-B is mixed with the polishing agent in a ratio ranging from about 0.5:1 to 2:1, wherein the mixing is carried out by stirring at a speed ranging from about 950 rpm to 1000 rpm for a duration ranging from about 10 minutes to 15 minutes.
32. The method as claimed in claim 28, wherein the preparing the Component-A comprises:
i. mixing the fatty acid ester with the solvent selected from a group comprising 2-butoxy ethanol, isopropyl alcohol, dichloromethane and combination thereof, followed by heating and filtering to obtain a solution;
ii. adding the emulsifier to the solution, followed by stirring;
iii. adding the adhesive, the stabilizing agent, the corrosion inhibitor and the dispersant to the solution of step (ii), followed by stirring; and
iv. mixing the solution of step (iii) with the crosslinking agent and the resin to obtain the Component-A.
33. The method as claimed in claim 32, wherein the heating in step (i) is carried out at a temperature ranging from about 70 ? to 80 ?, for a duration ranging from about 10 minutes to 15 minutes.
34. The method as claimed in claim 32, wherein the stirring in step (ii) is carried out at a speed ranging from about 700 rpm to 800 rpm, for a duration ranging from about 10 to 20 minutes.
35. The method as claimed in claim 32, wherein the stirring in step (iii) is carried out at a speed ranging from about 700 rpm to 800 rpm, for a duration ranging from about 20 minutes to 30 minutes.
36. The method as claimed in claim 28, wherein the preparing the Component-B comprises mixing the resin with the solvent under stirring at a speed ranging from about 240 rpm to 300 rpm, at a temperature ranging from about 20 ? to 40 ?, for a duration ranging from about 15 minutes to 20 minutes.
37. An article coated with the composition as claimed in any one of claims 1 to 27.
38. The article as claimed in claim 37, wherein the article is selected from a group comprising hot rolled metal and cold rolled metal.
39. The article as claimed in claim 37, wherein the coating has dry film thickness ranging from about 1µm to 5 µm.
40. The article as claimed in claim 37, wherein the article is resistant to corrosion for a duration ranging from about 4 months to 6 months, according to cyclic corrosion test.
41. A method of preparing the article as claimed in claim 37, wherein said method comprises coating the article with the composition as claimed in claim 1, followed by curing to obtain the article.
42. The method as claimed in claim 41, wherein the coating is carried out by technique selected from a group comprising spray coating, dip coating. roll coating, wiping method and any combination thereof.
43. The method as claimed in claim 41, wherein the curing is carried out at a temperature ranging from about 27 to 300C, for a duration ranging from about 5 minutes to 10 minutes.
44. A method of coating a substrate with the composition as claimed in claim any one of claims 1 to 27 for obtaining corrosion resistant substrate, wherein the coating is carried out by technique selected from a group comprising spray coating, dip coating, roll coating, wiping method and any combination thereof.
45. The method as claimed in claim 44, wherein the method comprises curing coated substrate at a temperature ranging from about 27 to 300C, for a duration ranging from about 5 minutes to 10 minutes.
46. The method as claimed in claim 44, wherein the obtained coated substrate is resistant to corrosion for duration ranging from about 4 months to 6 months, according to cyclic corrosion test.
47. The method as claimed in claim 44, wherein the substrate is selected from a group comprising, hot rolled metal and cold rolled metal; and wherein the coating on the substrate has dry film thickness ranging from about 1 µm to 5 µm.

, Description:TECHNICAL FIELD
The present disclosure relates to field of material sciences. The present disclosure particularly relates to composition and method of preparation thereof. The composition provides improved coating properties, such as resistance to corrosion and improved adhesion. The disclosure further relates to an article coated with said composition and method of preparation thereof. The disclosure also relates to method of coating a substrate with said composition to obtain substrate having improved resistance to corrosion.

BACKGROUND OF THE DISCLOSURE
Hot rolled (HR) metallic substrates are highly susceptible to humid and open environment, thereby susceptible to high red rusting.

Rusting of the HR metal can be prevented by employing techniques, such as electrodeposition, flame and electroplating and application of adherent film of organic and inorganic protective layer. Generally small metallic articles, such as GI bolts and threads are generally protected from corrosion by electrodeposition and electroplating process. However, the electrodeposition and electroplating processes are expensive and thus not economical for coating of HR metallic structures, such as metal nails, which exhibits higher corrosion rate during transportation, handling and storage.

Thus, there is a need for developing a coating composition which is economical and fulfil the desired coating properties, such as improved adhesion and improved resistance to corrosion to the HR metallic substrates/structures. The present disclosure describes a coating composition that is economical and fulfils above described properties.

STATEMENT OF THE DISCLOSURE
Accordingly, the present disclosure relates to a composition comprising: Component-A, comprising- fatty acid ester, solvent, adhesive, stabilizing agent, corrosion inhibitor, emulsifier, dispersant, crosslinking agent and resin; and Component-B, comprising- resin and solvent. The composition is economical and provides for improved coating properties, such as improved resistance to corrosion, rust prevention and improved adhesion to a substrate.

The present disclosure further relates to method of preparing the composition, said method comprises- preparing the Component-A; preparing the Component-B; and mixing the Component-A and the Component-B, optionally adding the polishing agent to obtain the composition.

The present disclosure further relates to an article coated with the composition described above.

The present disclosure further relates to method of preparing the article, wherein said method comprises coating the article with the composition described above, followed by curing to obtain the article.

The present disclosure further relates to method of coating a substrate with the composition described above for obtaining corrosion resistant substrate, wherein the coating is carried out by technique selected from a group comprising spray coating, dip coating, roll coating, wiping method and any combination thereof.

BRIEF DESCRIPTION OF THE ACCOMPANYING FIGURES
In order that the present disclosure may be readily understood and put into practical effect, reference will now be made to exemplary embodiments as illustrated with reference to the accompanying figure. The figure together with detailed description below, are incorporated in and form part of the specification, and serve to further illustrate the embodiments and explain various principles and advantages, where:

FIGURE 1 provides images of the composition comprising varied concentration of mixture of Component-A and Component-B and polishing agent/material.

FIGURE 2 provides images of HR nails coated with composition of the present disclosure and uncoated HR nails at different time points of 0 hours, 10 days and 4 months, respectively.

DETAILED DESCRIPTION OF THE DISCLOSURE
Unless otherwise defined, all terms used in the disclosure, including technical and scientific terms, have meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. By means of further guidance, term definitions are included for better understanding of the present disclosure.

As used herein, the singular forms ‘a’, ‘an’ and ‘the’ include both singular and plural referents unless the context clearly dictates otherwise.

The term ‘comprising’, ‘comprises’ or ‘comprised of’ as used herein are synonymous with ‘including’, ‘includes’, ‘containing’ or ‘contains’ and are inclusive or open-ended and do not exclude additional, non-recited members, elements or method steps.

The recitation of numerical ranges by endpoints includes all numbers and fractions subsumed within the respective ranges, as well as the recited endpoints.

The term ‘about’ as used herein when referring to a measurable value such as a parameter, an amount, a temporal duration, and the like, is meant to encompass variations of ±10% or less, preferably ±5% or less, more preferably ±1% or less and still more preferably ±0.1% or less of and from the specified value, insofar such variations are appropriate to perform the present disclosure. It is to be understood that the value to which the modifier ‘about’ refers is itself also specifically, and preferably disclosed.

Reference throughout this specification to ‘some embodiments’, ‘one embodiment’ or ‘an embodiment’ means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the present disclosure. thus, the appearances of the phrases ‘in some embodiments’, ‘in one embodiment’ or ‘in an embodiment’ in various places throughout this specification may not necessarily all refer to the same embodiment. It is appreciated that certain features of the disclosure, which are for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the disclosure, which are, for brevity described in the context of a single embodiment, may also be provided separately or in any suitable sub-combination.

The present disclosure describes a composition, particularly a coating composition with improved coating properties. The composition provides for improved corrosion resistance to substrate, demonstrates improved adhesion to the substrate and improved resistance to rust.

In an embodiment, the composition comprises-
i. Component-A, comprising- Fatty acid ester, solvent, adhesive, stabilizing agent, corrosion inhibitor, emulsifier, dispersant, crosslinking agent and resin; and
ii. Component-B, comprising- resin and solvent.

In some embodiments of the present disclosure, the fatty acid ester is having formula set forth as- RR'C28H43O5COOH, wherein R is COOH or CHO and R' is CH3 or CH2OH.

In some embodiments of the present disclosure, the fatty acid ester is in an amount ranging from about 15 wt% to 25 wt%, including all the values in the range, for instance, 15.1 wt%, 15.2 wt%, 15.3 wt%, 15.4 wt% and so on and so forth.
The inventors have identified that the fatty acid ester in an amount ranging from about 15 wt% to 25 wt% provides for improved coating properties to the composition. The inventors have noted that, fatty acid ester in an amount different from 15 wt% to 25 wt% causes dissolution issue and hampers flexibility of the composition (during or upon application on a substrate)

In some embodiments of the present disclosure, the solvent of the Component-A is selected from a group comprising- 2-butoxy ethanol, isopropanol alcohol, dichloromethane and combination thereof.

In some embodiments of the present disclosure, the solvent of the Component-A is combination of 2-butoxy ethanol, isopropanol alcohol and dichloromethane. In an embodiment, the combination of 2-butoxy ethanol, isopropanol alcohol and dichloromethane is in a ratio ranging from about 21:7:35 to 24:8:40. In another embodiment, the combination of 2-butoxy ethanol, isopropanol alcohol and dichloromethane is in a ratio of about 3:1:5.

The inventors have particularly identified that the combination of said fatty acid ester and the solvent having combination of 2-butoxy ethanol, isopropanol alcohol and dichloromethane in the composition prevents brittleness of the composition upon coating on a substrate.

In some embodiments of the present disclosure, the adhesive includes but it is not limited to solution of polyester alkyl ammonium salt. In an embodiment, the adhesive is BYK 4509.

In some embodiments of the present disclosure, the adhesive is in an amount ranging from about 2 wt% to 3 wt%, including all the values in the range, for instance, 2.1 wt%, 2.2 wt%, 2.3 wt%, 2.4 wt% and so on and so forth.

In some embodiments of the present disclosure, the stabilizing agent is selected from a group comprising ethyl acetoacetate, hexyl acetoacetate and combination thereof.

In some embodiments of the present disclosure, the stabilizing agent is in an amount ranging from about 0.2 wt% to 0.5 wt%. In an embodiment, the stabilizing agent is in an amount of about 0.2 wt%, about 0.3 wt%, about 0.4 wt% or about 0.5 wt%.

In some embodiments of the present disclosure, the corrosion inhibitor includes but it is not limited to amine salt of an aromatic sulfonic acid. In an embodiment, the corrosion inhibitor is Nacorr 1754

In some embodiments of the present disclosure, the corrosion inhibitor is in an amount ranging from about 0.4 wt% to 1 wt%. In an embodiment, the corrosion inhibitor is an amount of about 0.4 wt%, about 0.5 wt%, about 0.6 wt%, 0.7 wt%, about 0.8 wt%, about 0.9 wt% or about 1 wt%.

In some embodiments of the present disclosure, the emulsifier is selected from a group comprising hexylene glycol, propylene glycol and combination thereof.

In some embodiments of the present disclosure, the emulsifier is in an amount ranging from about 2 wt % to 5 wt%, including all the values in the range, for instance, 2.1 wt%, 2.2 wt%, 2.3 wt%, 2.4 wt% and so on and so forth.

In some embodiments of the present disclosure, the dispersant includes but it is not limited to solution of a salt of unsaturated polyamine amides and acidic polyester. In an embodiment, the dispersant is BYK W966.

In some embodiments of the present disclosure, the dispersant is in an amount ranging from about 0.5 wt% to 1 wt%. In an embodiment, the dispersant is in an amount of about 0.5 wt%, about 0.6 wt%, about 0.7 wt%, about 0.8 wt%, about 0.9 wt% or about 1 wt%.

In some embodiments of the present disclosure, the crosslinking agent is selected from a group comprising triethylamine, ammonium hydroxyl and combination thereof.

In some embodiments of the present disclosure, the crosslinking agent is in an amount of about 0.2 wt% to 0.5 wt%. In an embodiment, the crosslinking agent is in an amount of about 0.2 wt%, about 0.3 wt%, about 0.4 wt% or about 0.5 wt%.
The inventors have identified that employing crosslinking agent in an amount different from 0.2 wt% to 0.5 wt% would lead to precipitation which is not a desired attribute to the disclosed composition. In other words, employing crosslinking agent in an amount ranging from about 0.2 wt% to 0.5 wt% provides for improved coating properties to the composition.

In some embodiments of the present disclosure, the resin of the Component-A includes but it is not limited to n-butylated urea resin.

In some embodiments of the present disclosure, the resin of the Component-A is in an amount ranging from about 1 wt% to 2 wt%, including all the values in the range, for instance, 1.1 wt%, 1.2 wt%, 1.3 wt%, 1.4 wt% and so on and so forth.

In some embodiments of the present disclosure, the resin of the Component-B includes but it is not limited to silicon modified polyester resin.

In some embodiments of the present disclosure, the resin of the Component-B is in an amount ranging from about 15 wt% to 20 wt%, including all the values in the range, for instance, 15.1 wt%, 15.2 wt%, 15.3 wt%, 15.4 wt% and so on and so forth.
The inventors have particularly identified that employing the resin of the Component-B in an amount ranging from about 15 wt% to 20 wt% provides for improved properties to the composition, i.e., the composition exhibits improved resistance to corrosion upon application on a substrate. The inventors have identified that if the amount of the resin of the Component-B in the composition is different from 15 wt% to 20 wt% then desired corrosion resistance property is hampered and desired viscosity is not achieved, as a result there would be decrease in applicability on substrate.

In some embodiments of the present disclosure, the solvent of the Component-B is selected from a group comprising p-xylene, m-xylene and combination thereof.

In some embodiments of the present disclosure, the solvent of the Component-B is in an amount ranging from about 60 to 65 %
In some embodiments of the present disclosure, the composition additionally comprises polishing agent. In an embodiment, the polishing agent comprises about 11.441 wt% of silicon, about 42.223 wt% of calcium, about 12.928 wt% of sulphur, about 22.917 wt% of iron, and about 10.491 wt% of manganese. In an embodiment, the Component-A and Component-B is mixed together to obtain a mixture and then the mixture is combined with polished agent. In an embodiment, in the mixture, the Component-A and the Component-B is in a ratio ranging from about 10:1.5 to 10:2.

In some embodiments of the present disclosure, the mixture of the Component-A and the Component-B and the polishing agent is combined in a ratio ranging from about 0.5:1 to 2: 1.

In an embodiment, the mixture of the Component-A and the Component B and the polishing agent is in a ratio of about 0.5:1, about 1:1 or about 2:1.

In some embodiments of the present disclosure, the mixture of the Component-A and the Component-B and the polishing agent comprises- about 30 wt% to 48 wt% of silicon, about 16 wt% to 23 wt% of calcium, about 10 wt% to 16 wt% of sulphur, about 5 wt% to 11 wt% of barium, about 7 wt% to 26 wt% of iron and about 0.9 wt% to 6 wt% of manganese.

In some embodiments of the present disclosure, the composition comprises:
i. Component-A, comprising- fatty acid ester, solvent, adhesive, stabilizing agent, corrosion inhibitor, emulsifier, dispersant, crosslinking agent and resin;
ii. Component-B, comprising- resin with solvent; and
iii. Polishing agent.

In some embodiments of the present disclosure, the composition has specific gravity ranging from about 0.95 to 1.05, including all the values in the range, for instance, 0.96, 0.97, 0.98, 0.99 and so on and so forth.

The present disclosure further relates to method of preparing the composition.

In some embodiments of the present disclosure, the method of preparing the composition comprises:
- Preparing the Component-A;
- Preparing the Component-B; and
- Mixing the Component-A and Component-B, optionally adding the polishing agent to obtain composition.

In some embodiments of the present disclosure, the method of preparing the composition comprises:
- Preparing the Component-A;
- Preparing the Component-B; and
- Mixing the Component-A and Component-B to obtain the composition.

In some embodiments of the present disclosure, the method of preparing the composition comprises:
- Preparing the Component-A;
- Preparing the Component-B; and
- Mixing the Component-A and Component-B to obtain a mixture, followed by adding polishing agent to obtain the composition.

In some embodiments of the present disclosure, the method of preparing the Component-A comprises-
i. mixing the fatty acid ester with the solvent selected from a group comprising 2-butoxy ethanol, isopropyl alcohol, dichloromethane and combination thereof, followed by heating and filtering to obtain a solution;
ii. adding the emulsifier to the solution, followed by stirring;
iii. adding the adhesive, the stabilizing agent, the corrosion inhibitor and the dispersant to the solution of step (ii), followed by stirring; and
iv. mixing the solution of step (iii) with the crosslinking agent and the resin to obtain the Component-A.

In some embodiments of the present disclosure, upon mixing the fatty acid ester and the solvent, heating is carried out at a temperature ranging from about 70 ? to 80 ?, including all the values in the range, for instance, 70.1 ?, 70.2 ?, 70.3 ? 70.4 ? and so on and so forth. In an embodiment, the heating is carried out for a duration ranging from about 10 minutes to 15 minutes, including all the values in the range, for instance, 10.1 minutes, 10.2 minutes, 10.3 minutes, 10.4 minutes, 10.5 minutes and so on and so forth.
In some embodiments of the present disclosure, the filtration is carried out by employing filter cloth including but it is not limited 100 T filter cloth.

In some embodiments of the present disclosure, upon adding the emulsifier to the solution, the stirring is carried out at a speed ranging from about 700 rpm to 800 rpm, including all the values in the range, for instance, 701 rpm, 702 rpm, 703 rpm, 704 rpm and so on and so forth. In an embodiment, the stirring is carried out for a duration ranging from about 10 minutes to 20 minutes, including all the values in the range, for instance, 10.1 minutes, 10.2 minutes, 10.3 minutes, 10.4 minutes and so and so forth.

In some embodiments of the present disclosure, upon adding the adhesive, the stabilizing agent, the corrosion inhibitor and the dispersant, stirring is carried out at a speed ranging from about 700 rpm to 800 rpm, including all the values in the range, for instance, 701 rpm, 702 rpm, 703 rpm, 704 rpm and so on and so forth. In an embodiment, the stirring is carried out for a duration ranging from about 20 minutes to 30 minutes, including all the values in the range, for instance, 20.1 minutes, 20.2 minutes, 20.3 minutes, 20.4 minutes and so on and so forth.

In an exemplary embodiment of the present disclosure, preparing the Component-A comprises-
i. mixing about 15 to 25 wt% of the fatty acid ester with combination of solvent comprising about 21 to 24 wt% of 2-butoxy ethanol, about 7 wt% to 8 wt% of 2 propanol and about 35 wt% to 40 wt% of the dichloromethane, followed by heating and filtering to obtain a solution;
ii. adding about 2 wt% to 5 wt% of emulsifier selected from a group comprising propylene glycol and hexylene glycol, followed by stirring;
iii. Adding about 2 wt% to3 wt% of the adhesive, such as solution of polyester alkyl ammonium salt, about 0.2 wt% to 0.5 wt% of the stabilizing agent selected from a group comprising ethyl acetoacetate and hexyl acetoacetate, about 0.4 wt % to 1 wt% of the corrosion inhibitor, such as an amine salt of an aromatic sulfonic acid and about 0.5 wt% to 1 wt% of the dispersant, such as solution of a salt of unsaturated polyamine amides and acidic polyesters to the solution of step (ii), followed by stirring; and
iv. mixing the solution of step (iii) with about 0.2 wt% to 0.5 wt% of the crosslinking agent selected from a group comprising triethyl amine and ammonium hydroxyl and about 1 wt % to 2 wt% of the resin, such as n-butylated urea resin to obtain Component-A

In some embodiments of the present disclosure, preparing the Component-B comprises- mixing the resin including but not limited to silicon modified polyester resin and solvent including but not limited to p-xylene and m-xylene. During mixing the stirring is carried out at a speed ranging from about 240 rpm to 300 rpm, including all the values in the range, for instance, 241 rpm, 242 rpm, 243 rpm and so on and so forth. In an embodiment, the stirring is carried for a duration ranging from about 15 minutes to 20 minutes, including all the values in the range, for instance, 15.1 minutes, 15.2 minutes, 15.3 minutes and 15.4 minutes and so on and so forth. In an embodiment, the mixing is carried out at temperature ranging from about 20 ? to 40 ?, including all the values in the range, for instance, 20.1?, 20.2?, 20.3?, 20.4? and so on and so forth.

In some embodiments of the present disclosure, in the method, the Component-A and the Component-B are mixed in a ratio ranging from about 10:1.5 to 10:2. In an embodiment, the mixing is carried out by stirring at a speed ranging from about 1200 rpm to 1500 rpm, including all the values in the range, for instance, 1201 rpm, 1202 rpm, 1203 rpm, 1204 rpm and so on and so forth. In an embodiment, the stirring is carried out for a duration ranging from about 15 minutes to 20 minutes, including all the values in the range, for instance, 15.1 minutes, 15.2 minutes, 15.3 minutes, 15.4 minutes and so on and so forth.

In some embodiments of the present disclosure, the mixture of the Component-A and the Component-B and the polishing agent are mixed in a ratio ranging from about 0.5:1 to 2:1. In an embodiment, the mixing is carried out under stirring at a speed ranging from about 950 rpm to 1000 rpm, including all the values in the range, for instance, 951 rpm, 952 rpm, 953 rpm, 954 rpm and so on and so forth. In an embodiment, the stirring is carried out for a duration ranging from about 10 minutes to 15 minutes, including all the values in the range, for instance, 10.1 minutes, 10.2 minutes, 10.3 minutes, 10.4 minutes and so on and so forth.

In an exemplary embodiment of the present disclosure, the mixture of the Component-A and the Component-B is homogenized with the polishing agent in the ratio of about 0.5:1, about 1:1 or about 2:1 in a barrel under stirring at a speed ranging from about 950 rpm to 1000 rpm, for a duration ranging from about 10 minutes to 15 minutes.
In an exemplary embodiment of the present disclosure, the method of preparing the composition comprises-
A. preparing Component-A, comprising:
i. mixing about 15 to 25 wt% of the fatty acid ester with combination of solvent comprising about 21 to 24 wt% of 2-butoxy ethanol, about 7 wt% to 8 wt% of 2 propanol and about 35 wt% to 40 wt% of the dichloromethane, followed by heating and filtering to obtain a solution;
ii. adding about 2 wt% to 5 wt% of emulsifier selected from a group comprising propylene glycol and hexylene glycol, followed by stirring;
iii. Adding about 2 wt% to 3 wt% of the adhesive, such as solution of polyester alkyl ammonium salt, about 0.2 wt% to 0.5 wt% of the stabilizing agent selected from a group comprising ethyl acetoacetate and hexyl acetoacetate, about 0.4 wt % to 1 wt% of the corrosion inhibitor, such as an amine salt of an aromatic sulfonic acid and about 0.5 wt% to 1 wt% of the dispersant, such as solution of a salt of unsaturated polyamine amides and acidic polyesters to the solution of step (ii), followed by stirring; and
iv. mixing the solution of step (iii) with about 0.2 wt% to 0.5 wt% of the crosslinking agent selected from a group comprising triethyl amine and ammonium hydroxyl and about 1 wt % to 2 wt% of the resin, such as n-butylated urea resin to obtain Component-A;
B. preparing Component-B, comprising:
i. mixing about 15 wt% to 20 wt% of the resin, such as silicon modified polyester resin which is having 60 wt% to 65 wt% of the solvent selected from a group comprising p-xylene and m-xylene.
C. mixing the Component-A and the Component-B in a ratio ranging from about 10:1.5 to 10:2 to obtain the composition.

In another exemplary embodiment of the present disclosure, the method of preparing the composition comprises-
A. preparing Component-A, comprising:
i. mixing about 15 to 25 wt% of the fatty acid ester with combination of solvent comprising about 21 to 24 wt% of 2-butoxy ethanol, about 7 wt% to 8 wt% of 2 propanol and about 35 wt% to 40 wt% of the dichloromethane, followed by heating and filtering to obtain a solution;
ii. adding about 2 wt% to 5 wt% of emulsifier selected from a group comprising propylene glycol and hexylene glycol, followed by stirring;
iii. Adding about 2 wt% to 3 wt% of the adhesive, such as solution of polyester alkyl ammonium salt, about 0.2 wt% to 0.5 wt% of the stabilizing agent selected from a group comprising ethyl acetoacetate and hexyl acetoacetate, about 0.4 wt % to 1 wt% of the corrosion inhibitor, such as an amine salt of an aromatic sulfonic acid and about 0.5 wt% to 1 wt% of the dispersant, such as solution of a salt of unsaturated polyamine amides and acidic polyesters to the solution of step (ii), followed by stirring; and
iv. mixing the solution of step (iii) with about 0.2 wt% to 0.5 wt% of the crosslinking agent selected from a group comprising triethyl amine and ammonium hydroxyl and about 1 wt % to 2 wt% of the resin, such as n-butylated urea resin to obtain Component-A;
B. preparing Component-B, comprising:
i. mixing about 15 wt% to 20 wt% of the resin, such as silicon modified polyester resin which is having 60 wt% to 65 wt% of the solvent selected from a group comprising p-xylene and m-xylene.
C. mixing the Component-A and Component-B in a ratio ranging from about 10:1.5 to 10:2 to obtain a mixture.
D. mixing the mixture with polishing agent in a ratio of about 0.5:1 to 2:1 to obtain the composition.

The present disclosure further relates to an article comprising the composition described above.

In an embodiment of the present disclosure, the article is coated with the composition described above.

In some embodiments of the present disclosure, the article includes but it is not limited to galvanized metal, hot rolled (HR) metal, cold rolled metal and galvalume.

In an exemplary embodiment of the present disclosure, the article is HR metal, such as HR nails.
In some embodiments of the present disclosure, the coating on the article has dry film thickness ranging from about 1µm to 5 µm, including all the values in the range, for instance, 1.1 µm, 1.2 µm, 1.3 µm, 1.4 µm and so on and so forth.

In some embodiments of the present disclosure, the article is resistant to corrosion for a duration ranging from about 4 months to 6 months, according to cyclic corrosion test (CCT). In an embodiment, the article is resistant to corrosion for a duration of about 4 months, about 5 months or about 6 months.

In some embodiments of the present disclosure, the article is resistant to corrosion for a duration ranging from 120 days to 180 days, including all the values in the range, for instance, 121 days, 122 days, 123 days, 124 days and so on and so forth.

In some embodiments of the present disclosure, the coating on the article is semi-glossy in appearance, according to ASTM D523-14 method (Standard Test Method for Specular Gloss).

In an embodiment of the present disclosure, the article coated with the composition demonstrates improved resistance to corrosion. In an embodiment, the article shows improved resistance to rust.

The present disclosure further relates to method of preparing the article described above.

In some embodiments of the present disclosure, the method of preparing the article comprises- coating the article with the composition as described above, followed by curing to obtain the article.

In some embodiments of the present disclosure, the coating is carried out by technique selected from a group comprising spray coating, dip coating, roll coating, wiping method and any combination thereof.

In some embodiment of the present disclosure, the curing is carried out at a temperature ranging from about 27 ? to 30 ?, including all the values in the range, for instance, 27.1 ?, 27.2 ?, 27.3?, 27.4? and so on and so forth. In an embodiment, curing is carried out for a duration ranging from about 5 minutes to 10 minutes, including all the values in the range, for instance, 5.1 minutes, 5.2 minutes, 5.3 minutes, 5.4 minutes and so on and so forth.

The present disclosure further relates to a method of coating a substrate with the composition described above for obtaining corrosion resistant substrate.

In an embodiment of the present disclosure, the method of coating a substrate with the composition for obtaining corrosion resistant substrate comprises- coating the composition on to the substrate by techniques including but not limited to spray coating, dip coating, roll coating and wiping method, followed by curing.

In some embodiments of the present disclosure, in the method of coating the substrate with the coating composition, curing is carried out for a duration ranging from about 27 ºC to 30 ºC, including all the values in the range, for instance, 27.1 ºC, 27.2 ºC, 27.3 ºC, 27.4 ºC and so on and so forth. In an embodiment, the curing is carried out for a duration ranging from about 5 minutes to 10 minutes, including all the values in the range, for instance, 5.1 minutes, 5.2 minutes, 5.3 minutes, 5.4 minutes and so on and so forth.

In some embodiments of the present disclosure, in the method of coating the substrate, the substrate includes but it is not limited to galvanized metal, hot rolled metal, cold rolled metal and galvalume.

In some embodiments of the present disclosure, the coated substrate is resistant to corrosion for a duration ranging from about 4 months to 6 months, according to cyclic corrosion test. In an embodiment, the coated substrate is resistant to corrosion for a duration of about 4 months, about 5 months or about 6 months.

In some embodiments of the present disclosure, the coated substrate is resistant to corrosion for a duration ranging from 120 days to 180 days, including all the values in the range, for instance, 121 days, 122 days, 123 days, 124 days and so on and so forth.

In some embodiments of the present disclosure, the coated substrate has coating thickness ranging from about 1 µm to 5 µm, including all the values in the range, for instance, 1.1 µm, 1.2 µm, 1.3 µm, 1.4 µm and so on and so forth.
The composition and the article of the present disclosure provides for the following advantages.
- The composition provides for improved adherence, high gloss and improved corrosion resistance upon application onto a substrate.
- The composition enables online application or coating on a substrate and thus avoids loss in productivity.
- The composition provides for improved finishing on a substrate, such as HR nails. The improved finish achieved removes debris and provides brightness to the substrate, such as HR nails.
- The article coated with the composition provides improved resistance to corrosion.
- The article coated with the composition provides improved resistance to rust.

It is to be understood that the foregoing description is illustrative not a limitation. While considerable emphasis has been placed herein on particular features of this disclosure, it will be appreciated that various modifications can be made, and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. Those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein. Similarly, additional embodiments and features of the present disclosure will be apparent to one of ordinary skill in art based upon description provided herein.

Descriptions of well-known/conventional methods/steps and techniques are omitted so as to not unnecessarily obscure the embodiments herein. Further, the disclosure herein provides for examples illustrating the above-described embodiments, and in order to illustrate the embodiments of the present disclosure, certain aspects have been employed. The examples used herein for such illustration are intended merely to facilitate an understanding of ways in which the embodiments may be practiced and to further enable those of skill in the art to practice the embodiments. Accordingly, following examples should not be construed as limiting the scope of the embodiments herein.

EXAMPLES
Example 1: Preparing the Composition
Preparing Component-A
About 21.7 wt% of fatty acid ester was mixed with combination of solvent comprising 2-butoxy ethanol, 2 propanol and dichloromethane in a ratio of about 3:1:5. The obtained solution was heated at a temperature of about 70 ? for about 10 minutes and then filtered through 100 T filter cloth. About 2 wt% of the propylene glycol was added to the solution in an open vessel and stirred through mechanical stirrer at about 800 rpm for about 10 minutes. About 2.5 wt% of the solution of polyester alkyl ammonium salt, about 0.4 wt% of ethyl acetate, about 0.5 wt% of amine salt of an aromatic sulfonic acid, about 0.5 wt% of solution of a salt of unsaturated polyamine amides and acidic polyesters (where polyamine amide salt was about 30 to 40 wt%) were added to the solution and stirred at about 800 rpm for about 20 minutes to 30 minutes. Further, about 0.4 wt% of triethyl amine and about 1.5 wt% of n-butylated urea resin were added and mixed to obtain Component-A.

Preparing Component-B
About 40 wt% of silicone modified polyester resin was mixed with 60 wt% of p-xylene at room temperature (about 20 ? to 40 ?) under stirring at a speed of about 240 rpm to 300 rpm for about 15 minutes to 20 minutes to obtain Component- B.

About 15 wt. % of component B was blended in about100 wt. % of component A (in a ratio of about 1.5:10) to obtain the composition.

Example 2: Preparing the Composition
Preparing Component-A
About 21.7 wt% of fatty acid ester was mixed with combination of solvent comprising 2-butoxy ethanol, 2 propanol and dichloromethane in a ratio of about 3:1:5. The obtained solution was heated at a temperature of about 70 ? for about 10 minutes and then filtered through 100 T filter cloth. About 2 wt% of the hexylene glycol was added to the solution in an open vessel and stirred through mechanical stirrer at about 800 rpm for about 10 minutes. About 2.5 wt% of the solution of polyester alkyl ammonium salt, about 0.4 wt% of hexyl acetoacetate, about 0.5 wt% of amine salt of an aromatic sulfonic acid, about 0.5 wt% of solution of a salt of unsaturated polyamine amides and acidic polyesters (where polyamine amide salt was about 30 to 40 wt%) were added to the solution and stirred at about 800rpm for about 20 minutes to 30 minutes. Further, about 0.4 wt% of ammonium hydroxyl and about 1.5 wt% of n-butylated urea resin were added and mixed to obtain Component-A.

Preparing Component-B
About 40 wt% of silicone modified polyester resin was mixed with 60 wt% of m-xylene at room temperature (about 20 ? to 40 ?) under stirring at a speed of about 240 rpm to 300 rpm for about 15 minutes to 20 minutes to obtain Component- B

About 20 wt. % of component B was blended in about 100 wt. % of component A (in a ratio of about 2:10) to obtain the composition.

Example 3: Preparing the composition including polishing agent
The composition obtained in Example 1 was mixed polishing agent in a ratio of about 0.5:1, 1:1 and 2:1, respectively in a barrel at stirring speed of about 960 rpm for about 10 minutes to obtain composition including polishing agent. The elements present in the polishing agent/material and the composition including polishing agent is provided in Table 1. Analysis of the elements were carried out by energy dispersive X-ray fluorescence.
Elements Polishing material (PM) PM: mixture of Component-A and Component-B (1:0.5) PM: mixture of Component-A and Component-B (1:1) PM: mixture of Component-A and Component-B (1:2)
Si 11.441 30.786 39.652 47.929
Ca 42.223 22.350 20.599 16.889
S 12.928 10.220 13.238 15.935
Ba 0.00 5.390 9.253 10.640
Fe 22.917 25.570 14.416 7.641
Mn 10.491 5.684 2.848 0.966
Table 1: Elemental analysis of polishing agent/material and mixture of the Component-A and Component-B and polishing agent.

Figure 1 depicts images of the composition comprising mixture of Component-A and Component-B and polishing agent/material in a ratio of 0.5:1, 1:1 and 2:1, respectively.

Example 4: Preparing the article coated with the composition
HR nails were added to barrel comprising the composition including polishing agent, wherein the mixture of the Component-A and Component-B and Polishing agent is in a ratio of 0.5:1 and stirred at a speed of about 960 rpm for about 10 minutes to obtain the HR nails coated with the composition (coated article), wherein the coating was semi-glossy in nature. The obtained article was subjected to cyclic corrosion testing (CCT) in about 8 hours dry run (50 ? and 20% relative humidity) and 8 hours wet run (50 ? and 20% relative humidity) alternatively. Result of CCT showed that the coated article was not corroded even after 4 months but uncoated HR nails were corroded after 10 days only (depicted in Figure 2).

Example 5: Preparing the article coated with the composition
HR nails were added to barrel comprising the composition including polishing agent, wherein the mixture of the Component-A and Component-B and Polishing agent is in a ratio of 1:1 and stirred at a speed of about 960 rpm for about 10 minutes to obtain the HR nails coated with the composition (coated article), wherein the coating was semi-glossy in nature. The obtained article was subjected to cyclic corrosion testing (CCT) in about 8 hours dry run (50 ? and 20% relative humidity) and 8 hours wet run (50 ? and 20% relative humidity) alternatively. Result of CCT showed that the coated article was not corroded even after 4 months but uncoated HR nails were corroded after 10 days only (depicted in Figure 2).

Example 6: Preparing the article coated with the composition
HR nails were added to barrel comprising the composition including polishing agent, wherein the mixture of the Component-A and Component-B and Polishing agent is in a ratio of 2:1 and stirred at a speed of about 960 rpm for about 10 minutes to obtain the HR nails coated with the composition (coated article), wherein the coating was semi-glossy in nature. The obtained article was subjected to cyclic corrosion testing (CCT) in about 8 hours dry run (50 ? and 20% relative humidity) and 8 hours wet run (50 ? and 20% relative humidity) alternatively. Result of CCT showed that the coated article was not corroded even after 4 months but uncoated HR nails were corroded after 10 days only (depicted in Figure 2).

Additional embodiments and features of the present disclosure will be apparent to one of ordinary skill in art based on the description provided herein. The embodiments herein provide various features and advantageous details thereof in the description. Descriptions of well-known/conventional methods and techniques are omitted so as to not unnecessarily obscure the embodiments herein.

The foregoing description of the specific embodiments fully reveals the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments in this disclosure have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

As regards the embodiments characterized in this specification, it is intended that each embodiment be read independently as well as in combination with another embodiment. For example, in case of an embodiment 1 reciting 3 alternatives A, B and C, an embodiment 2 reciting 3 alternatives D, E and F and an embodiment 3 reciting 3 alternatives G, H and I, it is to be understood that the specification unambiguously discloses embodiments corresponding to combinations A, D, G; A, D, H; A, D, I; A, E, G; A, E, H; A, E, I; A, F, G; A, F, H; A, F, I; B, D, G; B, D, H; B, D, I; B, E, G; B, E, H; B, E, I; B, F, G; B, F, H; B, F, I; C, D, G; C, D, H; C, D, I; C, E, G; C, E, H; C, E, I; C, F, G; C, F, H; C, F, I, unless specifically mentioned otherwise.

While considerable emphasis has been placed herein on the particular features of this disclosure, it will be appreciated that various modifications can be made, and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other modifications in the nature of the disclosure or the preferred embodiments will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.