Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1994-11-22
1996-05-07
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106464, 106501, 106504, C09C 102
Patent
active
055142125
ABSTRACT:
A papermaking process with improved sizing efficiency and reduced size reversion is characterized by the use of a calcium carbonate pigment which is surface treated with an anionic starch-soap complex. The starch-soap complex is precipitated onto the pigment surfaces to provide bonding sites for sizing agents which impart water repellency to the paper. The sizing agents become bound to the starch component of the starch-soap complex to yield more reacted size in paper webs formed from the furnish than would be present without the use of the treated pigment. The use of the surface treated pigment also allows the papermaker to increase the filler content of the paper without sacrificing dry strength properties.
REFERENCES:
patent: 2188494 (1940-01-01), Bode
patent: 2949397 (1960-08-01), Werner et al.
patent: 3873336 (1975-03-01), Lambert et al.
patent: 4115187 (1978-09-01), Davidson
patent: 4775420 (1988-10-01), Gonnet et al.
patent: 4799964 (1989-01-01), Harvey et al.
patent: 5147507 (1992-09-01), Gill
Chem. Abs. 76:161181 of JP 17 07,607 to Tanaka et al. "Coating agents for paper" (Feb. 1971).
Chem. Abs. 55:22822 of DE 1,078,426 to Warren, S. D., Co. "Sizes for paper" (Mar. 1960).
"A Precipitated Starch Product", by C. C. Kesler and W. C. Black, Annual Meeting of the Technical Association of pulp and Paper Industry, Feb. 16-19, 1942, pp. 291-294.
"Diagnostic Sizing Loss Problem Solving in Alkaline Systems", by B. M. Moyers, 1991 Papermakers Conference, Wilmington, DE, pp. 425-432. (No month).
"The Interactions of Alkyl Ketene Dimer with Other Wet-End Additives", by A. R. Colasurdo and I. Thorn, Tappi Journal, Sep. 1992, pp. 143-149.
Bell Mark L.
Hertzog Scott L.
Westvaco Corporation
LandOfFree
Process for enhancing sizing efficiency in filled papers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for enhancing sizing efficiency in filled papers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for enhancing sizing efficiency in filled papers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1224334