SCRATCH-RESISTANT LAYERED COMPOSITE AND ARTICLES

摘要

Multi-layer composites having a blend of a dimethyl bisphenol cyclohexane polycarbonate and a bisphenol A polycarbonate as a top layer joined to a bisphenol-A polycarbonate second layer provide both surface scratch resistance and the ability to form molded and die cut articles. In the top layer, repeat units of dimethyl bisphenol cyclohexane are present in an amount of at least 50 weight percent relative of the total repeat units in the top layer, preferably in a weight ratio of from 60 to 75 weight percent.