Ppg Industries, Inc.

William R Beestrice

William I Frey

Joseph P Cherenko

An improved release surface for a laminating mold is disclosed wherein a glass mold surface is treated with methylchlorosilane to provide a release surface which is then polished with a polar solvent such as alcohol to remove oily residue from the release surface of the mold so that the surface of the released article is free from haze.

Method for developing a release surface on a glass mold

Retarding bloom in normally blooming polyurethane interlayers which are used in laminated windows, particularly motor vehicle safety glass windows in which one major surface of the polyurethane is exposed to the atmosphere, by applying a layer of wax to the exposed major surface of the polyurethane interlayer is disclosed. The resulting window is free from bloom for at least several months.

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New Kensington, PA, United States of America

William R Beestrice