GB528051A - - Google Patents

Abstract

528,051. Polymerization products. DU PONT DE NEMOURS & CO., E. I. April 19, 1939, No. 11842. Convention date, April 26, 1938. [Class 2 (iii)] Polysulphones are prepared by reacting sulphur dioxide with a mixture of at least one mono-olefine hydrocarbon, which contains at least two hydrogen atoms attached to the unsaturated carbon atoms and where the ethylenic linkage is within two carbon atoms of the end of the carbon chain, and a compound of the formula wherein R is hydrogen or alkyl and wherein A is a negative substituent. Suitable hydrocarbons include ethylene, propylene, n-butylene, isobutylene, 1-pentene, 2-pentene, 1-hexene, 1- octene, 1-nonene, cyclohexene, 3-methylcyclohexene ; suitable other compounds include methacrylic nitrile, methacrylic acid, methacrylic esters such as methyl methacrylate, acrylic esters such as methyl acrylate, vinyl acetate, methyl vinyl ketone and styrene ; suitable catalysts include ultra-violet light, hydrogen peroxide, dibenzoyl peroxide, ascaridol, acetyl benzoyl peroxide, dibutyryl peroxide, dilauryl peroxide, acetone peroxide, urea peroxide, succinic acid peroxide. In examples (1) propylene, sulphur dioxide and methyl methacrylate, vinyl acetate, vinyl methyl ketone, methacrylic nitrile, methyl acrylate or styrene are reacted in the presence of benzoyl peroxide, ascaridol and ethanol (7) n-butylene, sulphur dioxide and methacrylic acid or methyl methacrylate are reacted in the presence of benzoyl peroxide and ethanol (9) n-butylene, sulphur dioxide and vinyl acetate are reacted in the presence of ascaridol. The products may be used in the manufacture of coating compositions.