Curable fiberglass binder comprising a polyacetal or polyketal

摘要

A curable formaldehyde-free binding composition for use with fiberglass is provided. Such curable composition comprises an acid-catalyzed reaction product of an aldehyde or ketone with a multihydric alcohol. When heated, the composition forms polyacetal or polyketal that undergoes curing to form a water-insoluble resin binder which exhibits good adhesion to glass. In a preferred embodiment, maleic anhydride initially serves as a catalyst and subsequently enters into a cross-linking reaction during curing to form a poly(ester-acetal). Also, in a preferred embodiment, the fiberglass is in the form of building insulation. In other embodiments the product can be a microglass-based substrate for use in a printed circuit board, battery separator, filter stock, or reinforcement scrim.

主权项

1. A fiberglass binder comprising a curable composition comprised of an acid-catalyzed reaction product of an aldehyde or a ketone with a multihydric alcohol in the form of a polyacetal or a polyketal which upon curing is capable of forming a water-insoluble resin binder which exhibits good adhesion to glass, with an acid catalyst for the reaction selected from the group consisting of maleic acid, maleic anhydride, succinic acid, and succinic anhydride.