Vinylamine copolymer, flocculating agent and paper strength incr

Details Vinylamine copolymer, flocculating agent and paper strength incr Vinylamine copolymer, flocculating agent and paper strength incr

1993-11-08

1995-04-11

Lipman, Bernard

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253284, 525343, 525344, 525355, C08F 812

Patent

active

RE0349038

ABSTRACT:
Disclosed herein is a vinylamine copolymer having the structural units represented by the following formulas (I), (II), (III)[,] and (IV) [and (VI)]: ##STR1## wherein x.crclbar. represents an anion or hydroxyl ion R represents a hydrogen atom or a methyl group, M.sym. represents a hydrogen ion or a monovalent cation, in which the molar fraction of the structural unit (I) is 5 to 85% by mole, the molar fraction of the structural unit (II) is 2 to 85% by mole, the molar fraction of the structural unit (III) is 5 to 80% by mole,[the molar fraction of the structural unit (IV) is 0 to 40% by mole,] all of said molar fractions being based on the vinylamine copolymer, and the molar fraction of the structural unit [(V)] (IV) is 0 to 8% by mole which is based on the total content of the structural units (III)[,] and (IV), [and (V),] a flocculating agent and a paper strength increasing agent using the vinylamine copolymer, and a process for producing the vinylamine copolymer.

REFERENCES:
patent: 3976824 (1976-08-01), Ariyoshi et al.
patent: 4254250 (1981-03-01), Glowaky et al.
patent: 4552905 (1985-11-01), Keil et al.
patent: 4703087 (1987-10-01), Lange et al.
patent: 4774285 (1988-09-01), Pfohl et al.
patent: 4902751 (1990-02-01), Lewellyn et al.
Murao et al, Chemical Abstracts 106:5657m (12 Jan. 1987) (Citing JP 61-118,406 of 5 Jun. 1986).

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