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US 6,221,973 B1Granted
Curable aqueous composition and use as fiberglass nonwoven binder
AssigneeRohm and Haas Company
InventorsCharles Thomas Arkens, Robert David Gleim
Life of this patent
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Abstract
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.
Claims19
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 ⅓, 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.
3 more elements
A method for treating a heat-resistant nonwoven or heat resistant fibers thereof 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 ⅓, 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) contacting said nonwoven or fibers thereof with said curable aqueous composition;
- and
- (c) heating said curable aqueous composition at at temperature of from about 120 C. to about 400 C.
6 more elements
Dependencies are inferred from the claim text.