| 摘要 |
1409981 Copolymer production BAYER AG 9 Nov 1973 [11 Nov 1972] 52130/73 Heading C3P High molecular weight copolymers of acrylamide or methacrylamide and alkylaminoalkylacrylate salts of the formula are obtained by polymerization in an aqueous oxygen-free medium at a concentration of 1-10% in the presence of a redox initiator comprising (a) 0.005-0.1% of a water-soluble percompound and (b) 0.005-0-1% of a compound containing a primary amino group or a watersoluble salt thereof (percentages being based on the total monomers) at 10-45‹ C.; in the above formula R is hydrogen or methyl, R<SP>1</SP> is hydrogen or C 1 -C 4 alkyl, R<SP>2</SP> and R<SP>3</SP> are C 1 -C 4 alkyl, A is a C 2 -C 4 aliphatic radical and X is an anion. Suitable initiators are (a) alkali metal or ammonium persulphate, hydrogen peroxide, or t-butyl hydroperoxide and (b) aminoethyl methacrylate hydrochloride, cyclohexylamine, isobutylamine, n-butylamine, or triethylene tetramine. A salt may also be present. |
