ide solution, benzyl alcohol, N- methyl pyrrolidone, water, a corro- sion inhibitor, and a thickener, the composition having a pH of 6.5 to 11.0.

CLEANING NONFERROUS MlECALS

U.S. Patent 5,830,838. Now. 3, 1998 S.R. Wurzburger, Goodyear Bar, Calif and J.M. Ouerton, Yuba Cit.y, Calif:

A cleaning solution for use on cop- per alloys, which consists of a first solution of one of one half mole of Ca( OH), and one mole of KOH, one half mole of CaO and one mole of KOH, one half mole of calcium met- al; reacted with about one half mole of H,SO, in a quantity of water, said quantity selected from a range between one half liter and one liter, and filtered to remove precipitates of CaSO, and K2S0, larger than 10 microns whereby a cleaning solu- tion is provided for cleaning copper alloys.

WATBRBORNE COATING COMPOSITION

U.S. Patent 5,830,928. Nov. 3, 1998 D.L. Faler et al., assignors to PPG Industries Inc., Pittsburgh

A waterborne coating composition comprising a polymeric film-form- ing resin, wherein the polymeric film-forming resin comprises the reaction product of an unsaturated, substantially hydrophobic polyes- ter component and an ethylenically unsaturated monomer component.

WATER-REDUCIBLE COATING U.S. Patent 5,830,938. Nov. 3, 1998 D. St. Laurent and E. Spice, assignors to Morton Zntfrnational Inc., Chicago

A two-part polyurethane coating in which the first part comprises a water-reducible polyol and water, and the second part comprises a water-dispersible, aliphatic, pri- mary polyisocyanate.

WATBR-DISPERSIBLE COATING COMPOSITION U.S. Pntrnt 5,X.70,9.52. Nov. 3, 1998

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April 1999 a3