| 摘要 |
<p>1524899 Hydrophilic random interpolymers JOHNSON & JOHNSON 2 April 1976 13451/76 Heading C3P Random, bacteriostatic, hydrophilic, filmforming polymers are prepared by copolymerizmg in the presence of a free radical initiator a monomer mixture comprising (A) (1) 10 to 90 weight per cent of an ester of an alpha,#-olefinically unsaturated carboxylic acid and a monohydric or polyhydric alcohol having a terminal quaternary ammonium group and (2) 90 to 10 weight per cent of an alpha,#-olefinically unsaturated comonomer capable of being dispersed in aqueous media, in the presence of (B) a cross-linking agent comprising a difunctional ester or amide of an alpha,#-olefinically unsaturated carboxylic acid which is capable of being dissolved or dispersed in aqueous media, the comonomer (2) comprising (a) at least 10 weight per cent of acid monomer, (b) at least 20 weight per cent amide monomer or (c) at least 10 weight per cent of acid and amide monomers at least 5% being acid monomer. The polymers may be in colloidal dispersion, gel, film or particulate form and may be used as paint thickeners, in paper and fabric products, for coating medical instruments and as wound dressings. Examples describe the preparation of interpolymers from (A) (1) 2-hydroxy-3-methacryloyloxypropyl trimethyl ammonium chloride or 2-methacryloyloxyethyl trimethyl ammonium chloride, (A)(2) comonomers selected from acrylic and methacrylic acids and amides, hydroxyethyl acrylate, methyl acrylate and diacetone acrylamide, and crosslinking agents selected from (B) N,N<1>- methylene bisacrylamide, N-methylol acrylamide and triethylene glycol dimethacrylate.</p> |
