Thermosetting size press composition

Details Thermosetting size press composition Thermosetting size press composition

D - Textiles, Paper

21

H

117/193, 400/547

D21H 17/50 (2006.01) D21H 17/39 (2006.01) D21H 17/49 (2006.01) D21H 17/68 (2006.01) D21H 21/16 (2006.01) D21H 23/32 (2006.01)

Patent

CA 1337364

A thermosetting size applyable to paper in a size press and curable at a temperature not in excess of about 280°F. for 10 seconds is disclosed. This size comprises an aqueous emulsion comprising water having suspended therein aqueous emulsion copolymer particles of monoethylenically unsaturated monomers comprising hydroxy-functional monomer having an hydroxy number of at least about 20, and the balance of the monomers provides a water insoluble polymer having a glass transition temperature of from about -20°C. to about 50°C. The emulsion has a pH greater than about 2.5, preferably from 4.0 to 7.0, and a stoichiometric deficiency of an aminoplast cross-linking agent is used for cure. An acid curing catalyst is uniformly distributed in the size to speed the cure.

574172

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