Water repellant fiberglass binder

Abstract

Provided is a fiberglass binder composition which comprises a polycarboxy polymer modified with a fatty acid, and a polyol. The binder also preferably includes a catalyst which is an alkali metal salt of a phosphorus-containing organic acid. The resultant binder provides minimal processing difficulties and a fiberglass product which exhibits minimal water absorption.

1 - 24 . (canceled)  
     
     
         25 . A fiberglass binder having improved water absorption properties, comprising an aqueous solution of a modified polycarboxy polymer and a polyol.  
     
     
         26 . The fiberglass binder of  claim 25 , wherein the molecular weight of the polycarboxy polymer is less than 5000.  
     
     
         27 . The fiberglass binder of  claim 25 , wherein the molecular weight of the polycarboxy polymer is less than 3000.  
     
     
         28 . The fiberglass binder of  claim 25 , wherein the binder further comprises a catalyst which comprises an alkali metal salt of a phophorus containing organic acid.  
     
     
         29 . The fiberglass binder of  claim 25 , wherein the polyol is triethanolamine.  
     
     
         30 . The fiberglass binder of  claim 25 , wherein the amount of polycarboxy polymer and polyol in the binder is such that the ratio of carboxy groups equivalent to hydroxyl groups equivalents is in the range of from about 1/0.65 to 1/0.75.  
     
     
         31 . A fiberglass product comprising a mat of glass fibers containing the binder of  claim 25 .  
     
     
         32 . The fiberglass product of  claim 25 , wherein the product is building insulation.