Sizing agent and paper sized therewith

Details Sizing agent and paper sized therewith Sizing agent and paper sized therewith

D - Textiles, Paper

21

H

D21H 21/16 (2006.01) D21H 17/36 (2006.01) D21H 17/53 (2006.01) D21H 17/71 (1990.01)

Patent

CA 2120180

A sizing agent for paper, which comprises 100 parts by weight of a polyvinyl alcohol (component A) and from 1 to 20 parts by weight of a compound (component B) provided with the following requisites (1) to (4): (1) the backbone chain is a random copolymer of ethylene oxide and propylene oxide, (2) in the backbone chain, the proportion of oxyethylene units is from 20 to 40g by weight, and the proportion of oxypropylene units is from 60 to 80% by weight, (3) of the two terminals, one terminal is a hydroxyl group, and the other terminal is a C1-10 alkoxyl group or a hydroxyl group, and (4) the weight average molecular weight is from 600 to 1,200.

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