Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1990-01-25
1990-09-18
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...
5253282, 525340, 525343, 525355, 526307, 5263071, C08F 812
Patent
active
049579770
ABSTRACT:
Disclosed herein is a vinylamine copolymer having the structural units represented by the following formulas (I), (II), (III), (IV) and (V): ##STR1## wherein X.sup..crclbar. represents an anion or hydroxyl ion, R represents a hydrogen atom or a methyl group, M.sup..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) is 0 to 8% by mole which is based on the total content of the structural units (III), (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:
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patent: 4552905 (1985-11-01), Keil et al.
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patent: 4774285 (1988-09-01), Pfohl et al.
patent: 4902751 (1990-02-01), Lewellyn et al.
Murao et al., Chemical Abstracts 106:5657m (Jan. 12, 1987) (Citing JP 61-118,406 of Jun. 1986).
Itagaki Takaharu
Satoh Kohichi
Sawayama Shigeru
Shiraga Mitsuaki
Conlin David G.
Frei Frederick S.
Linek Ernest V.
Lipman Bernard
Mitsubishi Kasei Corporation
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