A-stage Resin

Name:
A-stage Resin
Detailed information:
(resole; one-step resin). An alkaline catalyzed thermosetting phenol-formaldehyde-type resin consisting primarily of partially condensed phenol alcohols. At this stage, the product is fully soluble in one or more common solvents (alcohols, ketones) and is fusible at less than 150C. On further heating and without use of a catalyst or additive, the resin is eventually converted to the insoluble, infusible, cross-linked form (C-stage). The A-stage resin is a constituent of most commercial laminating varnishes and is also used in special molding powders.See B-stage Resin; C-stage Resin; Novolak; Phenol-formaldehyde Resin.