GB760006A - Improvements in or relating to synthetic ether-resin copolymers - Google Patents

Abstract

Esters with drying properties are formed by esterifying an ether resin with an unsaturated acid which has been copolymerized with a vinyl monomer before or during the esterification. Ether resins are formed from polyhydric compounds many of which are listed in the Specification, and epi- or di-halohydrins, or polyepoxides, e.g. bis-(2,3-epoxypropyl)ether or butylene di-oxide. Monofunctional chain-terminating agents may be included in the reaction mixture if desired. Many vinyl monomers and many unsaturated acids are mentioned in the Specification. They may be copolymerized with the aid of benzoyl peroxide, di-tert.-butyl peroxide, sulphur, sulphur dioxide or a redox catalyst, e.g. a mixture of dodecyl mercaptan and benzoyl peroxide. Other catalysts are also mentioned. Solvents may be employed, e.g. xylol. Examples describe the production of copolymers as follows: B-1, B-8 and B-9, linseed oil fatty acids-styrene; B-2, dehydrated castor oil fatty acids-styrene; B-3, dehydrated castor oil fatty acids-acrylonitrile; B-4 to B-7, soybean fatty acids-styrene; B-10, B-11, linseed oil acids-vinyl toluene; B-12 to B-14, soya bean fatty acids-vinyl toluene; B-15 to B-17, Isoline fatty acids (from dehydrated castor oil)-styrene; B-18, Isoline acids-vinyl toluene; B-19 tung oil acids-vinyl toluene; B-20, soya bean acids-isobutylene; B-21, soya bean acids-p-methoxy styrene. A number of examples then describe the esterification of these copolymers with ether resins produced from epichlorhydrin and di-(4-hydroxyphenyl) dimethyl methane. In some examples benzoic acid was also included in the reaction mixture. The products are soluble in xylol and are film-forming.