Patent ID: 8426517

Claim:
A formaldehyde-free fiberglass product comprising a cured polyacetal or polyketal binder, with the fiberglass product being prepared by providing on fiberglass a coating of a composition comprising an acid-catalyzed reaction product of a multi-aldehyde or multi-ketone with a multihydric alcohol in the form of a polyacetal or polyketal, and thereafter curing said composition while present as a coating on said fiberglass to form a water-insoluble resin binder which exhibits good adhesion to glass, with the multihydirc alcohol selected from the group consisting ethylene glycol, 1,2-propylene glycol, 1,3propylene glycol, neopentyl glycol, pentaerythritol, glucose, sorbitol, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, and mixtures of the foregoing.