ANIONISCHES OBERFLAECHENLEIMUNGSMITTEL FUER PAPIER.

摘要

An anionic surface sizing agent for paper is an aq. colloidal soln. of a salt of a copolymer of (a) 10-30 wt. % of (meth)acrylic acid, (b) 5-30% of a (meth)acrylic ester of a 10-22C fatty alcohol, (c) 0-30% of styrene, (d) 0-30% of N, N-dimethylaminoethyl (meth)acrylate, (e) 0-40% of methyl (meth)acrylate, and (f) 0-40% of isobutyl (meth)acrylate. Pref. the COOH content of the copolymer is 150-250 mmols C00/100g of (a)-(f). Alkali, NH4, amine or alkanolamine salts are pref. The aq. colloidal soln. contains 5-30 (10-20) wt.% of the copolymer salt, and may contain up to 10% of a water-miscible organic solvent.