Sizing composition
AssigneeKao Soap Co., Ltd.
InventorsKinjiro Matsunaga, Kozo Ohira, Yunosuke Nakagawa
Life of this patent
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Abstract
A fabric sizing composition comprising a copolymer of a vinyl monomer and an unsaturated carboxylic acid copolymerizable therewith, together with a cationic polymer which is added during or after formation of the copolymer.
Claims9
A sizing composition comprising an aqueous emulsion prepared by aqueous emulsion copolymerization of a monomer mixture consisting essentially of (A) first vinyl monomer component consisting essentially of (1) from 80 to 100 percent by weight of one or a mixture of two or more vinyl esters of lower fatty acids and (2) from zero to 20 percent by weight of one or more vinyl comonomers copolymerizable with said vinyl ester, with the proviso that said vinyl comonomer does not contain a carboxyl group, and (B) one or a mixture of two or more unsaturated carboxyl group-containing monomers copolymerizable with said first vinyl monomer component, the amount of said unsaturated carboxyl group-containing monomer being in the range of from 0.1 to 15 percent by weight, based on the weight of said first vinyl monomer component;
- said aqueous emulsion containing admixed therein one or a mixture of two or more cationic polymers having the formula
- wherein A is a starch or cellulose residue;
- R is alkylene or hydroxyalkylene;
- R.sub.1, R.sub.2 and R.sub.3, which are the same or different, are alkyl, aryl or aralkyl, or ##STR21## form a heterocyclic ring;
- X is an anion;
- and l is a positive number such that the degree of substitution of the cationic group is at least 0.01, per one anhydroglucose unit of the starch or cellulose residue, said cationic polymer being added during the emulsion copolymerization or after the emulsion copolymerization is completed.
A fabric sizing composition consisting essentially of an aqueous emulsion of
- I. copolymer of
- A. vinyl monomer consisting essentially of from 80 to 100 percent by weight of one or a mixture of two or more vinyl esters of fatty acids having from 1 to 4 carbon atoms and from zero to 20 percent by weight of one or more vinyl comonomers copolymerizable with said vinyl ester, said comonomer being other than an unsaturated carboxyl group-containing monomer, and
- B. one or a mixture of two or more unsaturated carboxyl group-containing monomers selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, itaconic acid, aconitic acid, sorbic acid, p-vinylbenzoic acid, alkyl half esters of unsaturated polycarboxylic acids, partial esters of unsaturated polycarboxylic acids and partial amides of unsaturated polycarboxylic acids,
- said copolymr containing from 0.2 to 5.0 percent by weight of B, based on the weight of A,
- said copolymer I being mixed with
- II. one or a mixture of two or more cationic polymers selected from the group consisting of cationic polymers having the formula ##STR22## wherein A is starch or cellulose residue, R is alkylene or hydroxyalkylene, R.sub.1, R.sub.2 and R.sub.3, which can be the same or different, are alkyl, aryl or aralkyl, or can form a heterocyclic ring together with the nitrogen atom in the formula, X is an anion selected from the group consisting of chlorine, bromine, iodine, sulfuric acid, sulfonic acid, methylsulfuric acid, phosphoric acid or nitric acid, and l is a number of from 0.01 to 1, per one anhydroglucose unit of A,
- wherein the viscosity of a 1 wt. percent aqueous solution of said cationic polymer is from 5 to 1,000 cps, measured at 20.degree. C., said emulsion containing from 0.2 to 3.0 percent by weight of said cationic polymer II and from 25 to 50 percent by weight of A, and the balance is essentially water.
Dependencies are inferred from the claim text.