Paper-making additives comprising cationic polymers

Details Paper-making additives comprising cationic polymers Paper-making additives comprising cationic polymers

1993-09-01

1995-02-14

Chin, Peter

Paper making and fiber liberation

Processes and products

With coating after drying

1621682, 1621683, 1621684, 1621685, D21H 1745

Patent

active

053892038

ABSTRACT:
Disclosed herein is a paper-making additive.comprising a specified cationic polymer having an amidine structure. The cationic polymer additive for paper-making according to the present invention has 20 to 90% by mole of units represented by the formula (1) and/or (2): ##STR1## wherein R.sup.1 and R.sup.2 independently denote a hydrogen atom or a methyl group, and X- denotes an anion; and has a reduced viscosity of 0.1 to 10 dl/g as measured in a 1N saline solution of 0.1 g/dl at 25.degree. C. The additives are excellent in improving paper or pulp properties, such as freeness, filler retention and paper strength.

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