SE328949

1,182,171. Treating polymers; polysulphide products; sulphur compositions. SOC. NATIONALE DES PETROLES D'AQUITAINE. 7 March, 1967 [11 March, 1966], No. 10685/67. Headings C3N, C3P and C3R. [Also in Divisions C5 and El] ' Plastic reaction products are prepared by heating while stirring at 100‹ to 200‹ C. 40 to 95 parts by weight of molten sulphur, 0-05 to 59.5 parts by weight of a dithiolpolysulphide and 0À05 to 59À5 parts by weight of an olefin polymer, and optionally up to 49À5 parts by weight of an ethylenically unsaturated compound until a homogeneous plastic is formed. Specified olefin polymers are polymers and copolymers of ethylene, propylene, butene, isobutene, pentenes, hexenes, heptenes and octenes. The dithiol polysulphide may be of formula where m is 0 to 17, R and R 1 are hydrogen or alkyl and p is at least 2; and may be prepared by reaction of a haloepoxy alkane, e.g. 1-chloro- 5,6 - epoxyhexane, 2 - chloro - 5,6 - epoxyhexane, 1 - chloro - 4,5 - epoxypentane, 1- chloro - 3,4 - epoxybutane, 2 - bromo - 3,4- epoxybutane, 1 - chloro - 2,3 - epoxybutane and 1 - chloro - 2,3 - epoxypropane, with hydrogen sulphide and an alkali or alkaline earth metal polysulphide in aqueous solution. Specified unsaturated compounds are isobutene, diisobutene, triisobutene, cyclopentene, cyclohexene, pinene, camphene, allo-ocimene, myrcene, styrene, a-methylstyrene, chlorostyrene, indene, allene, butadiene, isoprene, chloroprene, hexadiene-1,5, diallyl, dimethallyl, heptadiene- 1,6, cyclopentadiene, vinyl cyclopentadiene, vinyl cyclohexene, divinyl acetylene, divinyl benzene, trivinyl benzene and hexatriene. The products may be formed by the separate or simultaneous addition of the organic reactants to molten sulphur, or by prereacting the dithiol polysulphide with the unsaturated compound and optionally the sulphur. The products may be used for making traffic signs and, optionally mixed with sand or gravel, for covering ground. They may be used in paints and as a jointing medium. Examples describe (I) the preparation of a dithiol polysulphide by reacting sodium hydroxide, sulphur, hydrogen sulphide and epichlorohydrin; and the preparation of plastic compositions by reacting this product with sulphur and (II) polybutene, (III and VIII) polybutene and styrene, (VI) polyethylene, (IX and X) polyisobutylene and styrene, (XI) ethylene/propylene copolymer and a-methylstyrene, (XII) atactic polypropylene and (XIII) atactic polypropylene and chloroprene.