| 摘要 |
<p>Interpolymers comprise from 90 to 99,8% by weight of at least one lower alkyl ester of an alpha, beta-olefinic monocarboxylic acid, from 0 to 5% by weight of an alpha, beta-olefinic nitrile, from 0,1 to 5% by weight of an alpha, beta-olefinic carboxylic acid. Monomers specified are: esters-methyl, ethyl, propyl and butyl acrylates, methacrylates and ethacrylates; nitriles -acrylonitrile, methacrylonitrile, ethacrylonitrile and vinylidene cyanide; acids-acrylic, methacrylic, ethacrylic, mesaconic, citraconic, maleic, crotonic and sorbic acids; N-alkylolamides-N-methylol, N-ethylol and N-propylol acrylamides, N-methylol methacrylamide, N-methylol maleamic acid and esters thereof and N-methylol-p-vinyl benzamide. The interpolymers may be prepared in an aqueous medium in the presence or absence of emulsifiers, e.g. long chain sulphates and sulphonates, cationic emulsifiers and condensation products of ethylene or propylene oxide, with the aid of catalysts, e.g. hydrogen peroxide, organic peroxides, hydroperoxides and peresters, persulphates and redox systems comprising (i) water-soluble peroxygen compounds and reducing agents such as sulphites, bisulphites, dimethylamino propionitrile and reducing sugars together, if desired with heavy metal ions, or (ii) a combination of a diazomercapto compound and a water-soluble ferricyanide. Also present during polymerization may be mercaptans. The monomeric material may be added gradually to the reaction mixture as polymerization proceeds and the reaction may be terminated at incomplete conversion of the monomers by the addition of hydroquinone or phenyl beta-naphthylamine. The resulting polymer dispersions may be applied to textiles or paper and cured by heating.</p> |
