Patent ID: 6194512
Filing Date: 2001-02-27
Classification: C03C,C08L,C09D

Abstract:
A method of making binder-coated glass fibers, comprising:providing an initial charge of phenol (P);providing formaldehyde (F) at a F:P molar ratio of from about 2:1 to about 6:1;reacting said phenol and said formaldehyde in the presence of an effective amount of an alkaline methylolation catalyst to form a phenolic resole resin;reacting some of the excess, unreacted formaldehyde in said phenolic resole resin with a formaldehyde scavenger under alkaline conditions to form a reaction pre-mix;combining said reaction pre-mix with an effective amount of a base neutralizing salt;combining an effective amount of a polycarboxylic acid polymer containing pendant carboxylic acid groups, a polyhydroxy tertiary alkanolamine and a thermoset catalyst with at least one of said phenolic resole resin, extended resole resin, and reaction pre-mix, to form a co-binder solution, wherein said polycarboxylic acid polymer forms a thermoset polymer in the presence of said polyhydroxy tertiary alkanolamine and said thermoset catalyst;applying said co-binder solution to glass fibers; andcuring said co-binder solution.