Non-ionic, water-soluble polymers for improving the dry-strength

Details Non-ionic, water-soluble polymers for improving the dry-strength Non-ionic, water-soluble polymers for improving the dry-strength

1977-09-12

1979-09-11

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Non-fiber additive

162168N, 162168NA, D21H 338

Patent

active

041674391

ABSTRACT:
A non-ionic copolymer composed of (in weight percent) 5 to 30% N-vinyl pyrrolidone, 15 to 60% acrylamide, and 30 to 70% methyl methacrylate is disclosed. The copolymer is added in minor amount to paper pulp, especially pulp containing black liquor contamination, to improve the paper making operation and the dry strength of the paper.

REFERENCES:
patent: 3323980 (1967-06-01), Poschmann et al.
patent: 3450680 (1909-06-01), Jursich et al.
patent: 3706629 (1972-12-01), Moore et al.
patent: 3840489 (1974-10-01), Strazdins

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