| 摘要 |
1,170,107. Amides or salts of vinyl ether/ polybasic acid copolymers. MONSANTO CO. 3 Feb., 1967 [4 Feb., 1966], No. 5337/67. Heading C3P. [Also in Division D2] Sizing agents for fibrous materials comprise a partial amide, mono- or di-ammonium salt, amide-amine salt or alkali metal salt of a copolymer of (a) vinyl ethers with 8-25 carbon atoms in the non-vinyl portion, and (b) residues of unsaturated polybasic acids, in an ether-toacid residue molar ratio of between 1/0À9 and 1/1À8, preferably with the ether and acid residues alternately disposed. Other monomers may be present such as di-isobutylene, vinyl-toluene, styrene, acrylonitrile and methyl methacrylate. Various alkyl, alkenyl, aryl, alkylaryl, alkoxyaryl and aryloxyalkyl vinyl ethers are specified. The polybasic acid residue may be introduced by means of a C 4 -C 10 acid anhydride, e.g. maleic, itaconic, aconitic, citraconic or chloromaleic, or by using monomethyl maleate, fumaric acid or hexen-3-ylene-1:6-dicarboxylic acid. Up to 10% of olefinic monocarboxylic acid may also be present, e.g. acrylic or crotonic. Polymerization is effected in benzene, toluene or xylene, with catalysts such as azobis-isobutyronitrlie, di-tert-butyl peroxide, tert-butyl perbenzoate or benzoyl peroxide, and a 50-150‹ C. initiator such as isopropyl peroxydicarbonate or tetrachlorobenzoyl peroxide. An alkanol may also be present to convert the acid anhydride groups into partial esters. The products have a mol. wt. below 200,000. The polymers are converted into their amide and/or salt derivatives by treatment with ammonia, alkali metal hydroxide or an amine of mol. wt. below 300, e.g. methylamine, ethylamine, diethylamine, propanolamine, diethanolamine, triethylamine or tributylamine. Compositions are formed of the above polymer derivatives with starch or proteinaceous sizes, e.g. corn, potato, sago, wheat, enzymeconverted, hydroxyethylated or oxidized starches, cationic starches having quaternary ammonium or other amine salt groups, or starch derivatives such as British gums. |
