JAMES MICHAEL VANEK
Engineers in New Kensington, PA

3965057, Jun 22, 1976

Feb 19, 1975

5/551188

Vernon G. Ammons - Glenshaw PA
James C. Vanek - New Kensington PA

PPG Industries, Inc. - Pittsburgh PA

C08G 1830, B32B 2718, B32B 2740

260 18TN

An improved polyurethane composition useful as an interlayer for safety glass window applications such as bilayer motor vehicle windshields is disclosed. The polyurethane is specially formulated with an organic silane and an organic phosphorus acid to provide a controlled degree of adhesion to glass maintainable under a wide range Of humidity and temperature conditions, particularly higher temperature and humidity conditions, which are especially detrimental to the maintenance of adhesion. The controlled degree of adhesion between the polyurethane and the glass provides improved penetration resistance in glass-polyurethane safety glass laminates.

4091128, May 23, 1978

Oct 8, 1976

5/731053

Helmut Franz - Pittsburgh PA
James C. Vanek - New Kensington PA

PPG Industries, Inc. - Pittsburgh PA

C23C 302

427304

A method for preparing an electroless gold plating bath comprising a gold salt and a complexing agent is improved by adding the gold salt as a concentrated solution to a concentrated solution of the complexing agent either maintained at or subsequently heated to above ambient temperature in order to eliminate the step of aging the plating bath. The plating efficiency of an electroless gold plating bath comprising a gold salt and an alkali carbonate complexing agent and the quality of the resulting gold film are improved by buffering the bath with an alkali metal bicarbonate thus maintaining a pH between about 8. 5 to about 9. 5.