Method for sizing paper using hydrolyzed homopolymers or copolymers of meta- or para- isopropenyl-.alpha.,.alpha.-dimethylbenzylisocyanate

Abstract

A method of sizing paper, comprising applying thereto a sizingly effective amount of a polymer selected from the group consisting of: (a) homopolymers of .alpha.,.alpha.-dimethyl-m-isopropenyl benzyl amine or .alpha.,.alpha.-dimethyl-p-isopropenyl benzyl amine; (b) copolymers of (i) .alpha.,.alpha.-dimethyl-m-isopropenyl benzyl amine or .alpha.,.alpha.-dimethyl-p-isopropenyl benzylamine, and (ii) at least one other ethylenically unsaturated monomer copolymerizable therewith; and (c) acid salts of said homopolymers (a) and copolymers (b). Such homopolymers or copolymers suitably may be prepared as the hydrolysis reaction products of the corresponding homopolymeric or copolymeric isocyanates.

Dependencies are inferred from the claim text.