Ppg Industries, Inc.

James H Hanlon

Helmut Franz

Lloyd G Shick

Paul F Duffer

A method is disclosed for providing a temporary layer of a release agent on a substrate such as glass by applying a liquid dispersion of solid particles which do not bond to the glass or form a film and evaporating the liquid to yield a layer of loosely adherent particles on the substrate surface.

Removable release agent on glass and bonding method employing same

A method is disclosed providing temporary protection of a glass surface from staining and scratches by coating the exposed surface with a soluble polymer film incorporating spacer particles of an inert material.

Soluble polymer interleaving material

A method is disclosed for protecting a substrate surface from particulate contaminants in a process using a working tool in conjunction with a working fluid, by employing as the working fluid a solution of a soluble polymer such as polyvinylpyrrolidone.

Polymer solution working fluid for finishing processes

A method for making a plastic billet particularly suitable for compression stretching by coating the plastic surface with a more extensible polymer film is disclosed.

Pressing plastic with extensible coating

A method is disclosed for improving a roughened surface of a plastic article by applying a smooth, durable polymer coating.

Plastic surface treatment

Highly efficient release surfaces on glass substrates prepared by treatment of the glass with poly alkyl hydrogen siloxane are disclosed.

Siloxane release surfaces on glass

A method is disclosed for making dimethyltin difluoride by reacting dimethyltin dichloride with an alkali metal or ammonium fluoride salt.

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Pittsburgh, PA, United States of America

James H Hanlon