Low odor insulation binder from phosphite terminated polyacrylic acid
OwnerLiang Chen, William Downey +1inventors
InventorsLiang Chen, William Downey, Richard Dobrowolski
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Abstract
A binder composition, obtained by polymerizing acrylic acid monomer in water in the presence of a cure accelerator comprising an alkali metal salt of a phosphorous-containing inorganic acid to form a low molecular weight polyacrylic acid and subsequently reacting said low molecular weight polyacrylic acid with a polyhydroxy crosslinking agent in a crosslinking step to make a composition suitable for use as a component in a binder for fiberglass. A significant improvement involves conducting the crosslinking step in the absence of added catalyst Moreover, satisfactory results are obtained in the absence of conventional undesirable sulfur odors.
Claims15
A composition suitable for use as a component in a binder for fiberglass, comprising:
- a polyacrylic acid having a weight-average molecular weight ranging from 1,000 to 10,000 polymerized from an acrylic acid monomer in the presence of a phosphorus based regulating agent to form a phosphite regulated polyacrylic acid, said regulating agent being suitable for use as an accelerating agent in a subsequent reaction step, and crosslinked by a polyhydroxy crosslinking agent, wherein a molar ratio of hydroxyl groups in said polyhydroxy crosslinking agent to carboxylic acid groups in said polyacrylic acid ranges from 0.4-0.6.
A composition suitable for use as a binder for fiberglass consisting essentially of:
- a polyacrylic acid having a weight-average molecular weight of from 1,000 to 10,000 polymerized from an acrylic acid monomer in the presence of a phosphorus based regulating agent to form a phosphite regulated polyacrylic acid, said regulating agent being suitable for use as an accelerating agent in a subsequent reaction step, and crosslinked by a polyhydroxy crosslinking agent selected from the group consisting of triethanolamine, glycerol, trimethylolpropane, 1,2,4-butanetriol, ethyleneglycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, pentaerythritol, sorbitol and mixtures thereof.
Dependencies are inferred from the claim text.