process for the production of homo - and copolymers of episulfiden and co - or terpolymeren from episulfiden with monomers of the vinylischen type and / or monomers of the lactontyps and blockcopolymeren of episulfiden and episulfid and vinylmonomeren

摘要

1401920 Polymerization initiators; polymerizing episulphides SNAM PROGETTI SpA 9 March 1973 [11 March 1972] 11610/73 Headings C3P and C3R [Also in Division C2] Homopolymers, copolymers or terpolymers of (a) episulphides, (b) vinylic monomers, (c) lactone monomers and (d) aldehydes or ketones are prepared by effecting the reaction in a polar solvent in the presence of a catalyst obtained by the reaction of zinc or a Group Ia, IIa or IIIa metal or a hydride, alkyl or amide derivative thereof with a compound where X and Y are SO or SO 2 , R and RSP11/SP are C 1-20 alkyl or cycloalkyl, aryl, aralkyl or alkylcycloalkyi groups or may be bivalent radicals joined together to form a ring, RSP1/SP is a bivalent arylene, cycloalkylene, alkarylene, alkylcycloalkylene or C 1-20 alkylene radical, m is 0 or 1 and n is an integer, preferably 1, 2 or 3. In examples, polypropylene sulphide is prepared by using as catalyst the compounds derived from CH 3 SO(CH 2 ) 6 SOCH 3 reacted with each of the LiBu, NaNH 2 , MgEt 2 , InEt 2 and CH 3 SO 2 (CH 2 ) 6 SO 2 CH 3 with LiBu; and with LiBu. The first such catalyst, which appears to be of formula is also used in examples to prepare homopolymers of ethylene sulphide, acrylonitrile, methacrylonitrile and pivalolactone; copolymers of propylene sulphide with each of ethylene sulphide, acrylonitrile, allyltiranylether (allyloxy - 2,3 - epithiopropane) and methacrylonitrile; block copolymers of propylene sulphide with each of ethylene sulphide, acrylonitrile, methacrylonitrile and pivalolactone; acrylonitrile-methyl methacrylate copolymer; propylene sulphide-ethylene sulphide-allyltiranyl ether terpolymer; and propylene sulphideacrylonitrile-allyltiranyl ether terpolymer. The latter terpolymer and also propylene sulphidepivalolactone copolymer are claimed "per se".