DESC:FIELD
The present disclosure relates to a textile coating composition and a process for its preparation. Particularly, the present disclosure relates to a coating composition for a textile substrate made of natural fibers.
DEFINITIONS
As used in the present disclosure, the following terms are generally intended to have the meaning as set forth below, except to the extent that the context in which they are used indicates otherwise.
Textile refers to flexible materials made of natural or synthetic fibers. The textiles are made by creating an interlocking bundle of yarns or threads, which are produced by spinning raw fibers into long and twisted lengths. Textiles are then formed by weaving, knitting, crocheting, knotting, tatting, felting, bonding, or braiding these yarns together.
Reactive dye refers to a class of dyes that can react with a fiber to form a covalent bond, by forming a permanent attachment to the fiber. These dyes become part of the fiber, leading to outstanding colour fastness.
Natural fibers refer to fibers obtained from the processing of natural products such as cotton, silk, wool, jute, and the like.
Dendrimers refer to nano-sized, radially symmetric molecules with a well-defined, homogeneous, and monodisperse structure that has a typically symmetric core, an inner shell, and an outer shell. Dendrimers are also known as dendritic polymers.
BACKGROUND
The background information hereinbelow relates to the present disclosure but is not necessarily prior art.
Textiles are an integral part of daily life, used in various forms such as clothing, bags, baskets, upholstered furnishings, window shades, towels, coverings for tables, beds, and the like. The textiles are generally coloured by using dyeing and printing techniques. The traditional method of printing involves screen printing, which is being replaced by digital printing and inkjet printing which is widely adapted in textile printing that uses reactive dyes.
The printing technique varies based on the textile substrate and the suitable dye. The dye is required to have certain properties such as the need to be absorbed/bound on the textile layer, should have uniform distribution, remain for a prolonged period of time, and the like. Uneven distribution, absorption of dye lead to the performance issues of the textile/fabric such as diminished colour, ink bleed, and the like.
Conventionally, natural fibers are directly dyed by using a reactive dye. The hydroxyl groups on the natural fibers will bind to the dye molecule to form a covalent bond. The fixation of the dye depends on the strength of the covalent bond formed between the available hydroxyl groups of natural fiber and the dichlorotriazine group of the reactive dye. A single hydroxyl functional group of natural fiber can bind to only one reactive dye molecule. Accordingly, upon application of dye molecules on the surface of the textile, only a maximum of 60% of the dye can bind to the natural fibers by a covalent bond. The remaining dye will be removed while washing, leaving a large amount of dye into the water bodies causing water pollution.
There is, therefore, felt a need to provide a textile coating composition that increases the adhesion of dye to the natural fibers, and mitigates the drawbacks mentioned hereinabove.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows.
An object of the present disclosure is to ameliorate one or more problems of the prior art or to at least provide a useful alternative.
Another object of the present disclosure is to provide a textile coating composition.
Yet another object of the present disclosure is to provide a textile coating composition for textiles that enhances the adhesion of dye.
Still another object of the present disclosure is to provide a textile coating composition that is economical and environment friendly.
Still another object of the present disclosure is to provide a process for the preparation of a textile coating composition.
Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure.
SUMMARY
The present disclosure relates to a coating composition and a process for its preparation.
In an aspect, the coating composition comprises dendrimer in an amount in the range of 0.5 mass% to 5 mass% with respect to the total mass of the composition; surfactant in an amount in the range of 1 mass% to 2 mass% with respect to the total mass of the composition; solubility enhancer in an amount in the range of 15 mass% to 25 mass% with respect to the total mass of the composition; oxidizing agent in an amount in the range of 2 mass% to 5 mass% with respect to the total mass of the composition and q.s. water.
In an another aspect, the process for the preparation of a coating composition comprises mixing a predetermined amount of dendrimer, surfactant, solubility enhancer, oxidizing agent, and water at a predetermined temperature for a predetermined time period at a predetermined speed to obtain a coating composition.
DETAILED DESCRIPTION
Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms "a,” "an," and "the" may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms "comprises," "comprising," “including,” and “having,” are open-ended transitional phrases and therefore specify the presence of stated features, integers, steps, operations, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The particular order of steps disclosed in the method and process of the present disclosure is not to be construed as necessarily requiring their performance as described or illustrated. It is also to be understood that additional or alternative steps may be employed.
As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed elements.
Conventionally, natural fibers are directly dyed by using a reactive dye. The hydroxyl groups on the natural fibers will bind to the dye molecule to form a covalent bond. The fixation of the dye depends on the strength of the covalent bond formed between the available hydroxyl groups of natural fiber and the dichlorotriazine group of the reactive dye. A single hydroxyl functional group of natural fiber can bind to only one reactive dye molecule. Accordingly, upon application of dye molecules on the surface of the textile, only a maximum of 60% of the dye can bind to the natural fibers by a covalent bond. The remaining dye will be removed while washing, leaving a large amount of dye into the water bodies causing water pollution.
The present disclosure provides a textile coating composition that is useful to enhance the adhesion of reactive dye and a process for preparing the textile coating composition.
In an aspect of the present disclosure, there is provided a fertilizer composition.
The textile coating composition comprises dendrimer in an amount in the range of 0.5 mass% to 5 mass% with respect to the total mass of the composition; surfactant in an amount in the range of 1 mass% to 2 mass% with respect to the total mass of the composition; solubility enhancer in an amount in the range of 15 mass% to 25 mass% with respect to the total mass of the composition; oxidizing agent in an amount in the range of 2 mass% to 5 mass% with respect to the total mass of the composition and q.s. water.
In accordance with an embodiment of the present disclosure, the dendrimer is at least one selected from the group consisting of Poly(amidoamine) (PAMAM) dendrimer and arborol.
In accordance with an embodiment of the present disclosure, the Poly(amidoamine) (PAMAM) dendrimer is at least one selected from the group consisting of Poly(amidoamine) (PAMAM) dendrimer generation 0 (CAS 155773-72-1), PAMAM dendrimer generation 0.5, PAMAM dendrimer generation 1 (CAS No 142986-44-5), PAMAM dendrimer generation 1.5 (CAS No. 202009-64-1), PAMAM dendrimer generation 2 (CAS No 93376-66-0), PAMAM dendrimer generation 2.5 (CAS No 202009-65-2), PAMAM dendrimer generation 3 (CAS No 153891-46-4), PAMAM dendrimer generation 3.5 (CAS No 192948-77-9), PAMAM dendrimer generation 4 (CAS No’s. 204401-84-3, 163442-67-9), PAMAM dendrimer generation 4.5 (CAS No 202009-66-3), PAMAM dendrimer generation 5 (CAS No 163442-68-0), PAMAM dendrimer generation 5.5 (CAS No 202009-67-4), PAMAM dendrimer generation 6 (CAS No 163442-69-1), PAMAM dendrimer generation 7 (CAS No 163442-70-4), PAMAM dendrimer generation 8 (CAS No 163442-71-5), PAMAM dendrimer generation 9 (CAS No 163442-72-6), and PAMAM dendrimer generation 10 (CAS No. 163442-73-7).
The Poly(amidoamine) (PAMAM) dendrimers are the reaction product of ethylenediamine and methyl acrylate. These dendrimers are hyperbranched polymers with unparallel molecular uniformity, narrow molecular weight distribution, which are characterized by size, shape, and a multifunctional terminal surface. The PAMAM dendrimer polymers consist of ethylenediamine core, repetitive branching amidoamine internal structure, and primary amine terminal surface.
In accordance with an embodiment of the present disclosure, the surfactant is at least one selected from the group consisting of methyl allyl sulphonate, sodium lauryl sulphate (CAS No. 151-21-3), sodium lauryl ethoxylated sulphate (CAS No. 68585-34-2), sulphonate of castor oil (CAS No. 8002-33-3), sulphonate of ethoxylated castor oil (CAS No. 8002-33-3), sulphonate of ethoxylated lauric acid, sulphonate of ethoxylated myristic acid, sulphonate of ethoxylated palmitic acid, sulphonate of ethoxylated stearic acid, sulphonated fatty alcohol ethoxylates, sulphonate of ethoxylated myristyl alcohol, sulphonate of ethoxylated palmitic alcohol, sulphonate of ethoxylated stearic alcohol, sulphonate of myristyl alcohol, sulphonate of palmitic alcohol, sulphonate of stearic alcohol, sulphonated fatty acid like sulphonate of lauric acid, sulphonate of myristic acid, sulphonate of palmitic acid, sulphonate of stearic acid, alpha-olefin sulphonate, sodium alginate monoalkyl phosphate, and linear alkylbenzene sulphonate.
In accordance with an embodiment of the present disclosure, the solubility enhancer is at least one selected from the group consisting of urea (CAS No 57-13-6), ethyl tosylate (CAS No 80-40-0), cumene sulfonate (CAS No 28348-53-0), and xylene sulfonate (CAS No 1300-72-7).
In accordance with the embodiments of the present disclosure, the oxidizing agent is 3-nitrobenzenesulfonic acid sodium salt (resist salt) (CAS No 127-68-4).
In accordance with the embodiments of the present disclosure, the coating composition comprises a sufficient quantity of water.
In another aspect of the present disclosure, there is provided a process for the preparation of the textile coating composition.
The process is described in detail
In accordance with an embodiment of the present disclosure, a predetermined amount of dendrimer, surfactant, solubility enhancer, oxidizing agent, and water are mixed at a predetermined temperature for a predetermined time period at a predetermined speed to obtain a textile coating composition.
In accordance with an embodiment of the present disclosure, the presence of highly ordered branched polymeric material increases the number of binding sites for each of the hydroxyl molecules on the natural fibers, thus enabling the bonding of more than one dye molecule by forming a strong covalent bond, thereby making the dyed textile substrate sustainable.
In accordance with an embodiment of the present disclosure, the coating composition is applied to the textile substrate before dyeing. The inclusion of branched polymeric materials in the coating composition increases the deposition of the reactive dye fixing on the textile substrate (made of natural fibers), providing more colour brilliancy. The coating composition increases the efficiency of the printing ink that binds to the textile fabric, thus effectively reducing the loss of reactive dye while washing followed by drying process after dyeing.
The coating composition thus avoids the loss of the reactive dye into the water while washing, which lowers water pollution and effectively reduces the cost of water treatment.
The foregoing description of the embodiments has been provided for purposes of illustration and is not intended to limit the scope of the present disclosure. Individual components of a particular embodiment are generally not limited to that particular embodiment but are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are considered to be within the scope of the present disclosure.
EXPERIMENTAL DETAILS
Experiment 1:
The coating composition of the present disclosure was mixed with distilled water to make a solution (25%). The cotton fabric intended for printing was soaked in the solution for 10 minutes under occasional stirring to ensure uniform coating of the coating composition on the fabric to obtain coated wet cotton fabric. The coated wet cotton fabric was squeezed to remove excess water to obtain a semi-dried cotton fabric. The so obtained semi-dried cotton fabric was dried in an oven at 120°C for 20 minutes to obtain coated cotton fabric.
The coated cotton fabric was dipped in a container containing reactive ink (CMYK ink (cyan, magenta, yellow, and key (black)) for 10 minutes under occasional stirring to ensure uniform coating of ink to obtain wet dyed coated cotton fabric. The wet-dyed coated cotton fabric was squeezed to remove excess ink to obtain a dyed cotton fabric.
The dyed cotton fabric was soaked in distilled water for 10 minutes under occasional stirring to ensure the fabric was dipped uniformly to remove the excess dye if any to obtain a first washed fabric and the elute was collected. The process is repeated 9 times and the subsequent elutes at each stage were collected. After 9 washes, the dyed cotton fabric was dried in the oven at 120°C for 20 minutes.
It was observed that during the washing dyed cotton fabric released a mild colour (top colour). It was also observed that the fabric was soft after coating and even after printing.
TECHNICAL ADVANCEMENTS
The present disclosure described hereinabove has several technical advantages including, but not limited to, the realization of a textile coating composition that:
• reduces the dye loss, thus reducing the dye requirement;
• has enhanced bonding of the dye with the textile substrate;
• reduces the cost of wastewater treatment;
• reduces environmental pollution;
• provides uniform printing, thus improving the aesthetics of the textile; and
• economical.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
The foregoing description of the specific embodiments so fully reveal 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 herein 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.
The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
Any discussion of documents, acts, materials, devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments 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 changes in the preferred embodiment as well as other embodiments of the disclosure 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.
,CLAIMS:WE CLAIM
1. A textile coating composition comprising:
a) dendrimer in an amount in the range of 0.5 mass% to 5 mass% with respect to the total mass of the composition;
b) surfactant in an amount in the range of 1 mass% to 2 mass% with respect to the total mass of the composition;
c) solubility enhancer in an amount in the range of 15 mass% to 25 mass% with respect to the total mass of the composition;
d) oxidizing agent in an amount in the range of 2 mass% to 5 mass% with respect to the total mass of the composition; and
e) q.s. water.

2. The composition as claimed in claim 1, wherein said dendrimer is at least one selected from the group consisting of Poly(amidoamine) (PAMAM) dendrimer and arborol.
3. The composition as claimed in claim 2, wherein said Poly(amidoamine) (PAMAM) dendrimer is at least one selected from the group consisting of Poly(amidoamine) (PAMAM) dendrimer generation 0 (CAS 155773-72-1), PAMAM dendrimer generation 0.5, PAMAM dendrimer generation 1 (CAS No 142986-44-5), PAMAM dendrimer generation 1.5 (CAS No. 202009-64-1), PAMAM dendrimer generation 2 (CAS No 93376-66-0), PAMAM dendrimer generation 2.5 (CAS No 202009-65-2), PAMAM dendrimer generation 3 (CAS No 153891-46-4), PAMAM dendrimer generation 3.5 (CAS No 192948-77-9), PAMAM dendrimer generation 4 (CAS No’s. 204401-84-3, 163442-67-9), PAMAM dendrimer generation 4.5 (CAS No 202009-66-3), PAMAM dendrimer generation 5 (CAS No 163442-68-0), PAMAM dendrimer generation 5.5 (CAS No 202009-67-4), PAMAM dendrimer generation 6 (CAS No 163442-69-1), PAMAM dendrimer generation 7 (CAS No 163442-70-4), PAMAM dendrimer generation 8 (CAS No 163442-71-5), PAMAM dendrimer generation 9 (CAS No 163442-72-6), and PAMAM dendrimer generation 10 (CAS No. 163442-73-7).
4. The composition as claimed in claim 1, wherein said surfactant is at least one selected from the group consisting of methyl allyl sulphonate, sodium lauryl sulphate, sodium lauryl ethoxylated sulphate, sulphonate of castor oil, sulphonate of ethoxylated castor oil, sulphonate of ethoxylated lauric acid, sulphonate of ethoxylated myristic acid, sulphonate of ethoxylated palmitic acid, sulphonate of ethoxylated stearic acid, sulphonated fatty alcohol ethoxylates, sulphonate of ethoxylated myristyl alcohol, sulphonate of ethoxylated palmitic alcohol, sulphonate of ethoxylated stearic alcohol, sulphonate of myristyl alcohol, sulphonate of palmitic alcohol, sulphonate of stearic alcohol, sulphonated fatty acid like sulphonate of lauric acid, sulphonate of myristic acid, sulphonate of palmitic acid, sulphonate of stearic acid, alpha-olefin sulphonate, sodium alginate monoalkyl phosphate, and linear alkylbenzene sulphonate.
5. The composition as claimed in claim 1, wherein said solubility enhancer is at least one selected from the group consisting of urea, ethyl tosylate, cumene sulfonate, and xylene sulfonate.
6. The composition as claimed in claim 1, wherein said oxidizing agent is at least one selected from the group consisting of 3-Nitrobenzenesulfonic acid sodium salt (resist salt).
7. A process for the preparation of textile coating composition, wherein said process comprising mixing a predetermined amount of dendrimer, surfactant, solubility enhancer, oxidizing agent and water at predetermined temperature for predetermined time period at predetermined speed to obtain a textile coating composition.
8. The process as claimed in claim 7, wherein said
a) dendrimer in an amount in the range of 0.5 mass% to 5 mass% with respect to the total mass of the composition;
b) surfactant in an amount in the range of 1 mass% to 2 mass% with respect to the total mass of the composition;
c) solubility enhancer in an amount in the range of 15 mass% to 25 mass% with respect to the total mass of the composition;
d) oxidizing agent in an amount in the range of 2 mass% to 5 mass% with respect to the total mass of the composition; and
e) q.s. water.
Dated this 10th day of February, 2023

_______________________________
MOHAN RAJKUMAR DEWAN, IN/PA – 25
of R.K. DEWAN & CO.
Authorized Agent of Applicant

TO,
THE CONTROLLER OF PATENTS
THE PATENT OFFICE, AT MUMBAI