Papermaking additive
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United States of America Patent
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Jan 5, 1988
Grant Date -
N/A
app pub date -
Aug 21, 1986
filing date -
Aug 22, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A papermaking additive useful for papermaking in a neutral to alkaline pH region which comprises a water-soluble copolymer comprising (a) 1 to 20 mole % of dimethylaminopropyl (meth)acrylamide or its quaternized product, (b) 0.1 to 12 mole % of itaconic acid or its salt, and (c) 98.9 to 68 mole % of acrylamide, the (b)/(a) mole ratio being from 0.1 to 0.6.
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