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 17/36 (2006.01) C08L 29/04 (2006.01) D21H 17/53 (2006.01) D21H 21/16 (2006.01) C08L 53/00 (2006.01)

Patent

CA 2061625

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) which (1) is a block copolymer of ethylene oxide and propylene oxide, (2) has a proportion of oxyethylene units of from 20 to 40% by weight and a proportion of oxypropylene units of from 60 to 80% by weight, (3) has one terminal that is a hydrogen atom bonded to an oxygen atom of an oxyethylene unit or an oxypropylene unit, and the other terminal that is a C1-10 alkoxyl group or a hydrogen atom bonded to an oxygen atom of an oxyethylene unit or an oxypropylene unit, and (4) has a weight average molecular weight of from 600 to 1,200.

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