| 摘要 |
A new polymer has a polymerisation feed mixt. of (a) a polymerisation initiator, (G) 0-5 mole.% based on the total of all monomers, present, of a vinylic copolymerisation crosslinker, and (c) one of the following mixt. (i) or (iii) where (i) is (I), 42-58 mole % of siloxy silane of formula (I), (II) 42-58 mole % of an unsubstd. alkyl (meth)acrylate of formula (II), (III) 0-5 mole % of a Gp. A monomer, and (IV) 0-16 mole % of an additional vinylic copolymerisable monomer of Gp. B, or where (iii) is (I) 16-42 mole % of siloxysilane I, (II) 42-58 mole % of alkyl (meth)acrylate II, (III) 0-5 mole % of a Gp A monomer and (IV) 0-36 mole % of a Gp B monomer. In the formulae, R1 = H or CH3; R2 = 1-6C alkylene; n = 0-2; R3 = H or CH3; R4 = CH3 or linear or branched 2-10C unsubstd. alkyl. Gp. A monomers are (meth)acrylic acid, maleic acid, fumaric acid, itaconic acid, cinnamic acid, crotonic acid, 2-(meth)acryloxyloxyethyl sulphonic acid, 2-(meth) acrylamido -2-methylpropane sulphonic acid, vinyl sulphonic acid, p-styrene sulphonic acid, allyl sulphonic acid and monomers of the formula (III). (R5 = H or CH3; R6 = 1-10C linear or branched alkyl, opt. substd. by CH, 1-4C alkoxy, Cl, Br, F, CO2H, 1-4C alkoxycarbonyl, 1-4C alkylcarbonyloxy or NH2). Gp. B monomer is neither a polymerisation inhibitor, a cross-linker nor a cpd. of formula (I) or (II) nor a Gp A monomer, but is a mono-satd. monomer copolymerisable with (I), (II) or Gp A cpds. |
