초록

This invention relates to a formaldehyde-free curable aqueous composition containing a polyacid, a polyol and a phosphorous-containing accelerator. The composition may be used as a binder for heat resistant nonwovens such as nonwovens composed of fiberglass.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for curing polyacids comprising:(a) forming a curable aqueous composition comprising admixing(1) a polyacid comprising at least two carboxylic acid groups, anhydride groups, or salts thereof;(2) a polyol comprising at least two hydroxyl groups; and(3) a phospho

[ What is claimed is:] [1.]1. A method for curing polyacids comprising:(a) forming a curable aqueous composition comprising admixing(1) a polyacid comprising at least two carboxylic acid groups, anhydride groups, or salts thereof;(2) a polyol comprising at least two hydroxyl groups; and(3) a phosphorous-containing accelerator;wherein the ratio of the number of equivalents of said carboxylic acid groups, anhydride groups, or salts thereof to the number of equivalents of said hydroxyl groups is from about 1/0.01 to about 1/3, and wherein said carboxylic acid groups, anhydride groups, or salts thereof are neutralized to an extent of less than about 35% with a fixed base, and (b) heating said curable aqueous composition at at temperature of from about 120 C. to about 400 C.