Non-formaldehyde durable press finishing for cellulosic textiles with phosphonoalkylpolycarboxylic
AssigneePPG Industries, Inc.
InventorsRobert H. Tang, William A. Williams, Jr.
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Abstract
A composition and method for providing a non-formaldehyde durable press finish to cellulosic fabrics by employing phosphonoalkylpolycarboxylic acids are disclosed. The phosphonoalkylpolycarboxylic acid is optimally used in combination with another polycarboxylic acid, such as polyacrylic acid, and/or, for cost effectiveness, a low-cost polycarboxylic acid such as citric acid. The catalyst for the curing reaction is optimally a phosphorus-containing acid or alkali metal salt thereof, such as a mixture of sodium monophosphate and sodium hypophosphite.
Claims17
A formaldehyde-free durable press finish composition for treating cellulose-containing fibrous materials consisting essentially of an aqueous solution of (i) 10 to 50 mole percent phosphonoalkylpolycarboxylic acid having at least one phosphono group, at least two carboxylic groups and wherein the alkyl group of said acid contains from 3 to 8 carbon atoms, (ii) 10 to 50 mole percent polyacrylic acid having a weight average molecular weight of less than 8000, and (iii) a catalytic amount of esterification catalyst, the sum of the polycarboxylic acids in said aqueous solution being 100 mole percent.
A formaldehyde-free durable press finish composition for treating cellulose-containing fibrous material consisting essentially of an aqueous solution of (i) 10 to 50 mole percent phosphonoalkylpolycarboxylic acid having at least one phosphono group, from 3 to 6 carboxylic groups and wherein the alkyl group of said acid contains from 3 to 8 carbon atoms, (ii) 10 to 50 mole percent polyacrylic acid having a weight average molecular weight of from about 300 to about 5000, and (iii) a catalytic amount of esterification catalyst, the sum of the polycarboxylic acids in said aqueous solution being 100 mole percent.
Dependencies are inferred from the claim text.