C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/1318, 117/19
C08L 29/04 (2006.01) C08L 61/28 (2006.01) D21H 3/52 (1985.01)
Patent
CA 1197334
ABSTRACT OF THE DISCLOSURE Stable aqueous polyvinyl alcohol/melamine- formaldehyde resin interaction products are provided com- prising polyvinyl alcohol polymer and cationic melamine- formaldehyde resin acid colloid in a polyvinyl alcohol/- melamine-formaldehyde resin acid colloid weight ratio, on a dry basis, of from about 1/1 to about 5/1, and sufficient water to give a solids content of from about 0.7% by weight up to a level that will not cause gelation to a stage of no flow under the force of gravity in 48 hours but not in excess of 6% by weight. These aqueous polyvinyl alcohol/melamine- formaldehyde interaction products have good stability, and high absorption capacity onto cellulose pulp. The use of these interaction products in paper making results in increased processing capability and improved wet and dry strength of the paper.
354852
E.i. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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