| 摘要 |
1,224,901. Water-soluble cationic amide polymers. AMERICAN CYANAMID CO. 3 April, 1968 [6 April, 1967], No. 16080/68. Heading C3P. [Also in Divisions C1 and D2] Water-soluble, thermosetting cationic poly mers which are resistant to hydrolysis and con tain 20-90 mole per cent of acrylamide units and 80-10 mole per cent of units of the formula wherein X is selected from -CH 2 CH 2 -, -CH 2 CH-CH 3 , -CH 2 CHOHCH 2 -, -CH 2 CH-CH 3 , -CH 2 CHOHCH 2 -, -CH 2 CH 2 NHCH 2 CH 2 - and -CH 2 CH 2 OCH 2 CH 2 -, are prepared by reacting a polymer of acrylamide with an amine of the formula NH 2 -X-NH 2 , where X has the aforesaid meaning and effecting an appropriate degree of transamidation. Suitable amine reactants include ethylenediamine, 1,3-diamino-2-propanol and diethylenetriamine; The starting acrylamide polymer may be a homopolymer or a copolymer containing minor amounts (e.g. up to 20 mole per cent) of units of other monomers, e.g. acrylonitrile, styrene or diallyldimethylammonium chloride, and monomers containing carboxyl groups, e.g. acrylic acid. The cationic copolymers may be partially reacted with a cross-linking agent such as epichlorohydrin, epibromohydrin, ethylene dichloride, diglycidyl ether or formaldehyde to enhance their thermosetting properties. |
