Enhancement of paper dry strength by anionic and cationic guar c

Details Enhancement of paper dry strength by anionic and cationic guar c Enhancement of paper dry strength by anionic and cationic guar c

1991-12-23

1994-08-16

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

162111, 162178, 162183, D21H 1732

Patent

active

053384075

ABSTRACT:
A process for making paper to enhance the dry strength of the paper produced without reducing its softness, that comprises adding to a bleached pulp furnish a mixture of an anionic carboxymethyl guar or a carboxymethyl hydroxyethyl guar with a cationic guar that may be prepared by reacting a natural guar with caustic and subsequently with quaternary ammonium chloride.

REFERENCES:
patent: 3049469 (1962-08-01), Davison
patent: 3332834 (1967-07-01), Reynolds, Jr.
patent: 3819555 (1974-06-01), Kaufman
patent: 4002588 (1977-01-01), Strazdins
patent: 4925530 (1990-05-01), Sinclair et al.
Casey, Pulp and Paper, 3rd ed. (1981) vol. III pp. 1501-1506.

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