Method for sizing paper using hydrolyzed homopolymers or...

Details Method for sizing paper using hydrolyzed homopolymers or... Method for sizing paper using hydrolyzed homopolymers or...

D - Textiles, Paper

21

H

8/93.43

D21H 17/45 (2006.01) C08F 12/28 (2006.01)

Patent

CA 1215803

METHOD FOR SIZING PAPER USING HYDROLYZED HOMOPOLYMERS OR COPOLYMERS OF META- OR PARA-ISOPROPENYL-.alpha.,.alpha.- DIMETHYLBENZYLISOCYANATE Abstract of the Disclosure 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) co- polymers 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. The copolymers of (b) also contain at least 1% by weight of repeating units derived from the amine mono- mer (i).

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