Patent ID: 7902276

Claim:
A dispersion-type surface sizing agent which is obtained by emulsion polymerization of a monomer composition in the presence of a degraded dextrin, wherein as the degraded dextrin, 20 to 40 parts by weight of a degraded dextrin having a weight average molecular weight of 26000 to 50000, which is obtained by enzyme denaturation of a waxy corn starch, are allowed to exist to 100 parts by weight of the total amount of the monomer composition, and the monomer composition includes (a) 10 to 35% by weight of at least one type of (meth)acrylic acid alkyl ester, (b) 40 to 80% by weight of other copolymerizable hydrophobic monomer, and (c) 1 to 10% by weight of a strong acid group-containing monomer.