Polymères modifiés de 1.2-époxyhydrocarbures et leur préparation

摘要

Chemically modified 1,2-epoxyhydrocarbon polymers are obtained by reacting the polymers having groups of the formula (-CH2CHRO-)n, where R is hydrogen, an alkyl group of 1 to 6 carbon atoms or phenyl, and n is 10 to 50,000, with an olefinicall unsaturated compound which can only be homopolymerized under the action of a free radical polymerization catalyst to a product having at most an average molecular weight of 10,000, the reactants being in proportions of 100 : 1 to 1 : 100, at a temperature of 30 DEG to 150 DEG C. and in the presence of a free radical polymerization catalyst. Suitable polymers are polyethylene glycols of molecular weight 200 to 5,000,000 and their dimethyl ethers, polypropylene glycol of molecular weight 200 to 10,000, polybutylene glycol, polystyrene oxide and copolymers containing these units, as well as addition products of alkylene oxides with amines, alcohols or acids, e.g. Suitable unsaturated compounds are alpha, beta-unsaturated dicarboxylic acids and their salts, anhydrides and esters, e.g. maleic and itaconic acid compounds; crotonic acid and its derivatives; vinyl sulphones of the formula RSO2CH=CH2 and RNH-SO2CH=CH2, where R is a substituted or unsubstituted alkyl or aryl group; esters of vinylsulphonic, vinylphosphonic, propene sulphonic and cinnamic acids and salts of cinnamic acid; allyl and vinyl alkyl ethers; dihydropyran; and allyl compounds of the formula CH2=CH-CH2X, where X is hydroxy, amino, alkoxy or acyloxy. Specified catalysts are dibenzoyl, diacetyl and di-tert.-butyl peroxides, diisopropyl percarbonate, azobisisobutyronitrile and redox systems, e.g. dibenzoyl peroxide/benzoin or potassium persulphate/sodium metabisulphite. Reaction may be effected in an inert atmosphere and solvents may be employed It is considered that the reaction takes place as follows The products are water-soluble and may be used as emulsifiers and detergents.