FORM - 2
The Patent Act, 1970 (SB Of 1976)
(Section 10; Rule 13)
"PROCESS FOR MANUFACTURING
OF RUBBER SHEET USING PARA
NiTRO PHENOL AS AN
ANTIFUNGAL AGENT".
MR. AJAY J. SABOO (Indian National) having address at 902, Nandadevi, Neeikanth Vailey, Rajawadi Road, No. 7, Ghatkopar (East), Mumbal-400 077.
The following specification particularly describes the nature of the invention & the manner in which it is performed;

GRANTED

14-3-2005
ORIGINAL

The present invention relates to Process For Manufacturing Of Rubber Sheet Using Para Nitro Phenol As An Antifungal Agent.
Latex and Formic Acid are the basic requirements for making rubber sheets. (Acetic acid may sometimes be used instead of Formic acid). Conventionally, a diluted solution of Formic Acid is used for coagulating diluted Latex to make natural rubber sheet. Natural Rubber Sheets are made by coagulation of latex obtained form "Hevea Brasiliensis". Latex obtained form the trees has a dry rubber content (DRC) of about 35 -36%, which is diluted with water to make to make it 12-13% DRC. This 12-13% DRC is then coagulated using Formic Acid - 85%. Conventionally a Rubber Farmer dilutes 50ml of the Formic Acid -85% to 5 litres (5000ml i.e. 100 times) and then uses the diluted Formic Acid as under:-
150 m! of the diluted Formic Acid for "next day" sheeting. 200 ml of the diluted Formic Acid for "same day" sheeting.
However, the conventional product used (Formic Acid) has several disadvantages, some of which are mentioned below.
Only coagulation action is carried out on the natural latex by the conventional product. Organic matter, water and tropical conditions make it conducive for fungus attacks. Since no anti-fungal treatment is given, the rubber thus formed is prone to fungal attacks.
The conventional product imparts a pale yellow colour to rubber sheet due to which it faiis to qualify as a 'Graded Rubber Sheet.

(For the rubber sheet to qualify as a 'Graded Rubber Sheet' i.e. minimum RSS - 4 grade sheets must have the following qualities:
The rubber sheets must be golden honey coloured.
The rubber sheets must be free from fungus.
The rubber sheets must be non-tacky and non-sticky.
The rubber sheets must be free from other Impurities like insects, dirt, stones
wood pieces etc.
The rubber sheets must be adequately dried in a smoke house.)
The rubber sheets formed using the conventional product are sticky and tacky in nature. This stickiness develops due to the growth of fungus on the sheets.
The rubber sheets formed using the conventional product do not have a long storage life.
Similarly, Formic acid is used In processing of leather. Use of conventional Formic acid does not darken the leather. Also the ieather remains vulnerable to fungus attacks.
The present invention 'Process For Manufacturing Of Rubber Sheet Using Para Nitro Phenol As An Antifungal Agent' has been developed with a goal to overcome the disadvantages of the conventional products and provide a better alternative.
The principal objective of the present invention is to give the natural rubber Ssheet an anti-fungal treatment by impregnating the rubber sheet with an effective anti-fungal agent.

The second objective is to ensure that the rubber sheet qualifies as a Graded Rubber Sheet'.
Another objective is that it should help make rubber sheets which are non-sticky and non-taeky.
Similarly, in processing of leather, the present product should help in giving leather an anti-fungai treatment by using a suitable anti-fungal agent. It should also help in darkening the leather.
The present product should be easier and less cumbersome to handle.
The present product should help make rubber sheets which have a longer storage life.
The present invention 'Process For Manufacturing Of Rubber Sheet Using Para Nitro Phenol As An Antifungal Agent' will now be explained in detail.
Formic Acid along with Latex are the basic requirements for making rubber sheets. A diluted solution of Formic Acid is used for coagulating diluted Latex to make natural rubber sheet. Formic Acid Is also used in the processing of leather. To get a 'Graded Rubber Sheet', which is resistant to fungus attack, pure formic acid 85% & an effective fungicide is required.
Now, Para Nitro Phenol finds application as an anti-fungai agent. Para Nitro Phenol can be used as a fungicide in the Formic Acid in two ways:

In ihe first method, Para Nitre Phenol is dissolved in Formic Acid 85% In the median recommended ratio of 150 gm in 1 kg of Formic Acid 85%.
In the second method, a dilute solution of Para Nltro Phenol Is prepared in water and the sheets are washed in this solution, after coagulation.
Para Nitro Pheno! is dissolved in Formic Acid of 85% strength, using one of the above stated two methods. The first method is more preferable as Para Nltro Phenol is completely impregnated into the rubber sheet at the time of coagulation. As against this, the second method only does a surface treatment of the rubber sheets. The solution is then stirred & mixed properly, and then filtered to obtain a ready-to-use solution of Para Nitro Phenol in Formic Acid. The product is then packed in factory-sealed, tamper-proof HOPE bottles and Jerry cans, In convenient pack sizes of *A kg, 1 kg, 2 kg and 5kg.
The present invention 'Process For Manufacturing Of Rubber Sheet Using Para Nitro Phenol As An Antifungal Agent' is a dark honey-brown coloured, pungent liquid with an irritating odour containing 88 - 87% of Formic Acid (85% strength) and 13 - 14% of Para Nitro Phenoi, with a pH of 1.50 - 1.60 and a specific gravity of 1.20. The method of using the present product is given below:
Take 50 mi (or 60 gm) of the present product, dilute it to 5.0 litres and use this solution for coagulating 100 litres of diluted latex (12 - 13% DRC) to get 25 numbers of rubber sheets of 5G0 gms each.
The present invention 'Process For Manufacturing Of Rubber Sheet Using Para Nitro Phenol As An Antifungal Agent' has many advantages over conventional product, some of which are mentioned below.

As compared to the conventional product which only carries out Coagulation action, the present product not only carries out Coagulation action but also gives the natural rubber sheet an anti-fungal treatment by Impregnating the rubber sheet with anti-fungai agent Para Nitro Phenol. Further. It also helps In quicker coagulation.
Since the stickiness that develops due to fungus attacks is prevented, if. helps in making the rubber sheets non-sticky and non-tacky.
The present product imparts a Golden-Honey colour to the rubber sheet which qualifies it as Graded Rubber Sheet1 (minimum RSS-4 if 'Filtered Latex' is used).
The present product is easier and less cumbersome to handle, since it is premlxed and ready for use. Hence there Is no need to weigh the Formic Acid 85% and Para Nitro Phenol separately, then mix the two Items and filter it, before using it for coagulation.
Rubber sheets prepared from the present invention have a longer storage life as compared to those prepared using conventional product.
Rubber sheets prepared from the present invention can be initially air dried followed by reduced dryinq time in smoke house.

Similarly, use of the present product in processing of leather gives leather an antifungal treafment by Impregnating and coating with anil-fungal agent Para Nltro Phenol and also darkens the leather.

I CLAIM :-
1)The present invention "A process for manufacturing of rubber sheet using para nitro phenol as an antifungal agent" in which 88-87% of formic acid having 85% strength and 13-14% of para nitro phenol is stirred and mixed properly and then filtered to obtain a ready-to-use solution, this solution is completely impregnated into the rubber sheet at the time of coagulation, this can be explain with an example:- 50 mi or 60 gm of solution of para Nitro Phenol and Formic Acid is diluted 5 liters and this solution is used for coagulating 100 liter of diluted latex (12 -13 % DRC) to get 25 numbers of rubber sheets of 500 gms each.
2) The "process for manufacturing of rubber sheet using para nitro phenol as an antifungal agent" as claimed in Claim 1 in which in one method 13 - 14% of para Nitro Phenol is dissolved in Formic Acid 85% in the median recommended ration of 150 gm in 1 kg of Formic Acid 85%.
3) The "process for manufacturing of rubber sheet using para nitro phenol as an
antifungal agent" as claimed in claim 1 and 2 in which in the alternate method, a
dilute solution of Para Nitro Phenol is prepared in water and the sheets are
washed in this solution, after coagulation.
4) The "process for manufacturing of rubber sheet using para nitro phenol as an
antifungal agent" as claimed in claim 1 to 3 in which solution is dark honey-brown
coloured, pungent liquid with an irritating odour, containing 86 - 87% of Formic Acid
(85% strength) and 13-14% of Para Nitro Phenol, with a pH of 1.50 - 1.60 and a
specific gravity of 1.20.
Dated 04 DAY OF August, 2003.
MR. JOSEPH VARIKASERY OF VARIKASERY & VARIKASERY
Agent for the applicant.