Abstract: Disclosed are molded plastic parts particularly eyeglass frame components, the centrifugal spin-casting of such parts and mold apparatus for producing such parts. Also disclosed are flexible molds for spin-casting eyeglass fronts and temples. In accordance with one aspect of the invention, the plastic parts are made from a resin system or mixture in liquid form comprising an epoxy resin, a curing agent therefore and an ultra-violet absorber and/or an antioxidant. DGEBA-type epoxy resins and polyoxypropylenediamine curing agents are the disclosed preferred epoxy resin and curing agent.
Type:
Grant
Filed:
October 27, 1978
Date of Patent:
October 13, 1981
Assignee:
Universal Optical Company, Inc.
Inventors:
Irving J. Arons, Richard E. Merrill, Arthur P. Drennan