METHOD FOR SIZING PAPER USING HYDROLYZED HOMOPOLYMERS OR COPOLYMERS OF META- OR PARA-ISOPROPENYL-.alpha.,.alpha.- DIMETHYLBENZYL-ISOCYANATE

摘要

METHOD FOR SIZING PAPER USING HYDROLYZED HOMOPOLYMERS ORCOPOLYMERS OF META- OR PARA-ISOPROPENYL-.alpha.,.alpha.-DIMETHYLBENZYLISOCYANATEAbstract of the DisclosureA method of sizing paper, comprising applying thereto asizingly effective amount of a polymer selected from the groupconsisting of: (a) homopolymers of .alpha.,.alpha.-dimethyl-m-isopropenylbenzyl amine or .alpha.,.alpha.-dimethyl-p-isopropenyl benzyl amine; (b) co-polymers of (i) .alpha.,.alpha.-dimethyl-m-isopropenyl benzyl amine or .alpha.,.alpha.-dimethyl-p-isopropenyl benzylamine, and (ii) at least one otherethylenically unsaturated monomer copolymerizable therewith; and(c) acid salts of said homopolymers (a) and copolymers (b). Suchhomopolymers or copolymers suitably may be prepared as thehydrolysis reaction products of the corresponding homopolymeric orcopolymeric isocyanates. The copolymers of (b) also contain atleast 1% by weight of repeating units derived from the amine mono-mer (i).