METHACRYLIC ACID POLYMER EXTENDED UREA-FORMALDEHYDE RESIN COMPOSITION FOR MAKING FIBERGLASS PRODUCTS

摘要

The present invention provides methacrylic acid polymer modified aqueous urea formaldehyde resin (UF resin) binder compositions useful in making a treated glass mat, e.g. for roofing shingles, wherein the methacrylic acid polymer comprises the reaction product of at least 50 wt. %, based on the total weight of monomers used to make the methacrylic acid polymer, of methacrylic acid or its salts, or mixtures thereof, a water-soluble phosphorous or sulfur containing compound and the remainder of a carboxylic acid group containing monomer, such as acrylic acid. The methacrylic acid polymers have at least one of a phosphite group, hypophosphite group, phosphinate group, diphosphinate group, and/or sulfonate group and enable modified UF resins to have early strength development even when the binder compositions comprise from 0.1 to less than 5 wt. % of the polymer modifier, based on total solids of the UF resin and the polymer modifier.

主权项

1. An aqueous urea formaldehyde resin (UF resin) binder composition comprising the UF resin and from 0.1 to less than 5 wt. % of at least one polymer modifier, based on total solids of the UF resin and the polymer, wherein the polymer modifier is a methacrylic acid polymer that contains at least one acid group which is other than a carboxylic acid group and which is chosen from a phosphite group, hypophosphite group, phosphinate group, diphosphinate group, sulfonate group and combinations thereof, wherein the methacrylic acid polymer is the reaction product of 50 wt. % or more of methacrylic acid, a salt thereof, or mixtures thereof, based on the total weight of monomers used to make the methacrylic acid polymer, and the remainder of a carboxylic acid group containing monomer; and,
further wherein the at least one polymer modifier has a weight average molecular weight of from 2,000 to 16,000.