Organic vegetable oil based resin and preparation method thereof

Abstract

Disclosed are organic, UV resistant epoxy resins derived largely from vegetable oil based materials. More specifically, the present invention provides a virtually non-toxic, hypoallergenic UV resistant resin and method of producing and using the same that gives off substantially no VOCs and no disagreeable odors. The composition comprises a vegetable oil-based polyfunctional carboxylic acid, a cycloaliphatic anhydride, and an epoxy compound either of bicyclic difunctional epoxy resin, epoxidized vegetable oil or epoxidized polymer chains. The composition further comprises a catalyst and a wetting agent. In its cured state the material is leather like and exhibits high tensile strength as well as unusually high, totally reversible elongation. In an alternative embodiment, the resin comprises a cyclic anhydride (Lindride 16E). With increased amounts of cyclic anhydride, increased heat distortion temperature is exhibited; all while maintaining a high reversible elongation and high tensile strength In an additional alternative, an increased amount of Chromium III Octoate is used and in another alternative Phosphoric Acid.

We claim: 
     
         1 . An epoxy resin composition comprising:
 a) from 15 to 55 weight percent trimer acid;   b) from 10 to 30 weight percent Lindride 16E;   c) from 40 to 50 weight percent epoxidized linseed oil;   d) from 3 to 6 weight percent 2-ethylhexanoic acid salt of Chromium III; and   e) from 0.5 to 1 weight percent Mapeg 400.   
     
     
         2 . The epoxy resin composition according to  claim 1  further comprising a phosphoric acid solution, wherein said phosphoric acid solution is in a ratio by weight of phosphoric acid solution to epoxidized linseed oil from 1:75 to 1:25. 
     
     
         3 . The epoxy resin composition according to  claim 1  wherein the epoxy compound comprises bicyclic difunctional epoxy resin. 
     
     
         4 . The epoxy resin composition according to  claim 3  wherein the bicyclic difunctional epoxy resin is CY179. 
     
     
         5 . An epoxy resin composition comprising:
 about 15%-55% by weight of trimer and/or dimer acids;   about 10%-30% by weight of cyclic anhydride pre-catalyzed with a quaternary amine halide salt;   about 40%-50% by weight of linseed oil;   about 0.3%-5% by weight of a 80%/20% mixture of Chromium III Octoate with 2-ethyl hexanoic acid; and   about 0.5%-1.0% by weight of polyethylene glycol ester.   
     
     
         6 . The epoxy resin composition of  claim 5  further comprising about 0.50%-1.0% phosphoric acid by weight. 
     
     
         7 . An epoxy resin composition comprising:
 about 15%-55% by weight of trimer and/or dimer acids;   about 10%-30% by weight of non-alcohol cyclic anhydride pre-catalyzed with a quaternary amine halide salt;   about 40%-50% by weight of linseed oil;   about 0.25%-1.0% of 50% by weight phosphoric acid;   about 0.3%-5% by weight of a 90%/10% mixture of Chromium III Octoate with 2-ethyl hexanoic acid; and   about 0.5%-1.0% by weight of polyethylene glycol ester.