Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1991-12-09
1994-05-31
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-fiber additive
1621646, 1621682, 1621683, 162175, 162176, 162177, 162178, 162183, D21H 1772
Patent
active
053166230
ABSTRACT:
A method for imparting wet strength to paper with improved water absorbency, that comprises adding to an aqueous suspension of cellulosic paper stock a neutral or alkaline-curing thermosetting wet-strength resin, a water-soluble polymer containing carboxyl groups or carboxylate ions as their alkali metal or ammonium salts, and a substantially non-thermosetting tertiary-amino polyamide-epichlorohydrin resin.
REFERENCES:
patent: 3049469 (1962-08-01), Davison
patent: 3058873 (1962-10-01), Keim et al.
patent: 3224986 (1965-12-01), Butler et al.
patent: 3332834 (1967-07-01), Reynolds, Jr.
patent: 3483077 (1969-12-01), Aldrich
patent: 3660338 (1972-05-01), Economou
patent: 3677888 (1972-07-01), Economou
patent: 3790514 (1974-02-01), Economou
patent: 3998690 (1976-12-01), Lyness et al.
patent: 4218286 (1980-08-01), Jones et al.
Proceedings of the 1983 TAPPI Papermakers Conference, Portland, Org. pp. 191-195.
Reynolds, Chapter 6 in "Dry Strength Additives", W. F. Reynolds, ed. TAPPI Press, Atlanta, 1980, p. 141, FIG. 6-9.
Chin Peter
Hercules Incorporated
Jackson Roy V.
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