Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1977-08-17
1980-02-19
Bashore, S. Leon
Paper making and fiber liberation
Processes and products
Non-fiber additive
162168N, 162168NA, 162169, D21H 338
Patent
active
041893450
ABSTRACT:
A fibrous product containing (a) a papermaking grade of pulp, (b) a structured particle latex having pH independent cationic groups bound at or near the particle surface and (c) a co-additive. The pulp is represented by unbleached softwood kraft. The latex is represented by a structured-particle latex having (a) a core of a copolymer of styrene and butadiene (b) an encapsulating layer of styrene, butadiene and vinylbenzyl chloride which is reacted with 2-(dimethylamino) ethanol to form quaternary ammonium groups. The co-additive is represented by a hydrolyzed polyacrylamide having a degree of polymerization of 5500. To an aqueous slurry of the pulp are added the latex and an aqueous solution of the co-additive, the resulting suspension is dewatered and dried by heating.
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Alincie et al., J.A.P.S., vol. 20, pp. 2209-2219, 1976.
Foster William A.
Pickelman Dale M.
Wessling Ritchie A.
Bashore S. Leon
Murphy I. A.
Smith William F.
The Dow Chemical Company
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