Polycarboxy/polyol fiberglass binder
Provided is a novel fiberglass binder comprising a polycarboxy polymer and a polyol. The amount of polycarboxy polymer and polyol contained in the binder is such that the ratio of equivalents of hydroxyl groups to carboxy groups is preferably in the range from from about 0.6/1 to 0.8/1. It is further preferred that the molecular weight of the polycarboxy polymer is less than 10,000, and more preferably less than 5000.
1. A fiberglass binder, comprising an aqueous solution of
a) a polycarboxy polymer having a number average molecular weight of 5,000 or less, and
b) a polyol
with the amount of polycarboxy polymer and polyol in the binder being such that the ratio of equivalents of hydroxyl groups to equivalents of carboxy groups is in the range of from 0.6/1 to 0.8/1, and with the viscosity of the binder solution, at 25° C. and 40% solids, ranging from about 20 cP to about 100 cP.
2. The fiberglass binder of claim 1 , wherein the molecular weight of the fiberglass binder is about 3000 or less.
3. The fiberglass binder of claim 1 , wherein the polyol is triethanolamine.
4. The fiberglass binder of claim 1 , wherein the polycarboxy polymer comprises a homopolymer or copolymer of polyacrylic acid.
5. The fiberglass binder of claim 1 , wherein the ratio is in the range of from about 0.6/1 to about 0.75/1.
6. The fiberglass binder of claim 1 , wherein the ratio of equivalents of hydroxyl group to equivalents of carboxy group is in the range of from about 0.65/1 to about 0.75/1.
7. A fiberglass binder, comprising an aqueous solution of
a polycarboxy polymer which comprises a homopolymer or copolymer of polyacrylic acid, and with the number average molecular weight of the polyacrylic acid being about 5000 or less,
triethanolamine, and
a catalyst comprised of sodium hypophosphite, sodium phosphite, or mixtures thereof,
with the amount of the palyacrylic acid and triethanolamine being such that the ratio of hydroxyl group to carboxyl group equivalents is in the range of from about 0.65/1 to 0.75/1, and with the binder solution having a viscosity, at 25° C. and 40% solids, ranging from about 20 cP to about 100 cP.
8. The fiberglass binder of claim 7 , wherein the molecular weight of the polycarboxy polymer is about 3000 or less.
9. The fiberglass binder of claim 7 , wherein the molecular weight of the polycarboxy polymer is about 2000.
10. A fiberglass product comprising a mat of glass fibers containing the binder of claim 1 .
11. A fiberglass product comprising a mat of glass fibers containing the binder of claim 7 .
12. The fiberglass product of claim 10 , wherein the product is building insulation.
13. The fiberglass product of claim 10 , wherein the building insulation is insulation for the roof.
14. The fiberglass product of claim 11 , wherein the product is building insulation.
15. A process for making a fiberglass fiber mat using a binder, with the binder comprising the fiberglass binder of claim 1 .