GB581170A - Copolymers - Google Patents

Abstract

An infusible and insoluble polymer is prepared by polymerizing a mixture of a fusible heat-convertible polymer of an organic oxygen compound containing at least two polymerizable groups and another compound containing at least one of said groups. The fusible polymers may be prepared as described in Specifications 536,807, 540,938 and 540,939. In addition, the polymers made from mono or diisopropenyl carbonate, phthalate, crotonate, maleate, acrylate, malonate or oxalate may be used. Further, the fusible polymer may be prepared as described in Specifications 578,266 and 578,267. The other compound may be vinyl acetate, vinyl chloride, acrylic or a -substituted acrylic acids, methyl, ethyl, propyl, butyl, amyl and lauryl acrylates, methacrylates ethacrylates or a -chloro-acrylates glycol and glycerol monoacrylates or monomethacrylates, glycerol monochloroacrylate, resorcinol monomethacrylate; allyl or crotyl acetate, chloride, benzoate and alcohol; methallyl chloride, acetate, butyrate and benzoate; styrene, vinyl ethyl ether, ethyl allyl ether; methyl, ethyl, propyl, butyl or amyl crotonates, chlorocrotonates, cinnamates or tiglates, methyl, ethyl, propyl or butyl maleates or fumarates; monomethylallyl, monoallyl or monocrotyl phthalates, citrates, tartrates, silicates, adipates, glutarates, lactates, glycollates, suberates, succinates, phosphates, phosphites, sulphates, sulphites or sulphides; butadiene and chlorobutadiene. Mixtures of fusible, heat-convertible polymers, or such polymers incorporated in a monomer capable of forming such polymers may be further polymerized. Preferably, the composition resulting from the polymerization of monomer is concentrated to increase the proportion of fusible polymer relative to monomer. The further polymerization may be catalysed by oxygen, ozone or peroxides under heat, light or pressure. The catalyst may be formed in situ by oxidizing the monomer or polymer by passing air or oxygen through their solutions. In a typical example, a solution of allyl methacrylate and benzoyl peroxide in acetone was refluxed at 63 DEG C. for three hours. Methyl alcohol was added and the mixture added, with stirring, to a methyl alcohol-water mixture. The precipitate of fusible polyallyl methacrylate was mixed with methyl methyacrylate and benzoyl peroxide and heated in a mould at 65 DEG C. for 17 hours. The product was further heated at 100 DEG C. for eight hours to produce an insoluble material.