Vinylamine copolymer flocculating agent etc.
USRE34713E · kind E · reissue
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1992 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Sep 16, 2012 |
Classification
- Technology area (CPC —)General
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..]. .Iadd.Disclosed herein is a vinylamine copolymer comprising structural units represented by the following formulas: ##STR2## .Iaddend. wherein X.sup..crclbar. represents an anion or hydroxyl ion, R represents a hydrogen atom or a…
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