In the Metal Finishing Field Printed copies of patents are furnished by the Patent and Trademark Office for $3.00 each. Address orders to: Commissioner of Patents and Trademarks, Washington, DC. 20231.

Color Plus Clearcoat U.S. Patent 5,709,950. Jan. 20, 1998 J. W. Bugman et al, PPG industries Inc. Pittsburgh

A color-plus-clear composite coating that contains polymers having carbamate functionality.

Waterborne Adhesion Promoter U.S. Patenf 5,709,946. Jan. 20, 1998 ML. Jackson et al., assignors to Bee Chemical Co., Lansing, 111.

An article having a polyolefin resin sur- face, which is coated with an aqueous com- position comprising a halogen-free copol-

ymer of a higher a-olefin and at least one monomer selected from the group consist- ing of ethylene and propylene; a neutraliz- ing base; and a water-dispersible resin con- taining at least two epoxy groups.

Paint Composition U.S. Patent 5,710,201. Jan. 20, 1998 T: Hayakawa and K. Shibato, assignors to BASF Corp., Southfield, Mich.

A paint composition comprising a vinyl- type copolymer obtained by polymerizing I to 50% by weight of a silicone-type vinyl monomer. 5 to 60% of a vinyl monomer containing a hydroxyl group, and 5 to 80% of another vinyl monomer; a silicone com-

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pound; and a hardening agent, which al- lows reaction with hydroxyl groups.

Coating Composition U.S. Patent 5,710,2&3. Jan. 20, 1998 K. Bederke et al, assignors to Herb& GmbH, Wuppertal, Germany

A binder composition suitable for coat- ing compositions. which binder comprises 25 to 75% by weight of one or more resins containing carboxyl groups; 25 to 75% of one or more polyethers, polyesters, poly- ether-polyesters and/or (meth)acrylic co- polymers; 0 to 60% of one or more polyols with at least two hydroxyl functional

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groups per molecule; 0 to 20% of one or more melamine resins; 0 to 40% of one or more capped polyisocyanates; 0 to 10% of one or more catalysts: and 0.1 to 10% of one or more thermally or photochemically activated initiators.

Waterborne Coating U.S. Patent 5,710,209. Jan. 20, 1998 H. B/urn and J. Pedain, assignors to Bayer AG, Leverkusen, Germany

An aqueous coating composition based on polyester polyurethanes.

Thermosetting Powder Coating Composition U.S. Patent 5,710,214. Jan. 20, 1998 C-T Chou and R.B. Barbee, assignors to PPG Industries Inc., Pittsburgh

A powder coating composition compris- ing 55 to 71% weight of a glycidyl func- tionalized acrylic copolymer; 9 to 14% of an aliphatic carboxylic acid; and 17 to 34% of a blocked polyisocyanate.

Polyester Powder Coating U.S. Patent 5,710&V. Jan. 20, 1998 A. Kaplan et al., assignors to EMS-lnventa AG, Zurich, Switzerland

A method for producing glycidic ether- containing amorphous or semicrystalline copolyesters, characterized in that in a first step a hydroxyl-functional amor- phous or semicrystalline copolyester is produced and subsequently in a second step is converted with an epihaloalkane to form a glycidic ether-containing co- polyester.

Paint Dispensing Apparatus U.S. Patent5,711,458. Jan. 27, 1998 M.J.J. Langeveld and J.H.N. Post, assignors to Fluid Management Inc., Wheeling, 111.

An apparatus for dispensing a plurality of pulverulent materials comprising a plu- rality of canisters for storing materials to be dispensed; a dispensing station; a plurality of metering pumps; a movable platform for supporting the canisters and for presenting preselected ones to the dispensing station; and pump actuator means.

Powder Coating Apparatus U.S. Patenf5,711,489. Jan. 27, 1998 K. Yanagida ef a/., assignors to Nihon Parkerizing Co. Ltd., Tokyo

An electrostatic powder coating appara- tus comprising a spray gun and a powder supply unit, wherein the apparatus is adapted to form a coating film by spraying electrostatically charged powder toward a surface of an electrically grounded product to he coated.

Spray Gun Valve U.S. Patent 5,711,4&X Jan. 27, 1998 RD. wheeler; assignor to Ransburg Corp., lndianapolis

A trigger-operated pneumatic valve for a spray gun having a pneumatic actuator, which turns on the spray gun when the pneumatic valve is opened to vent pressur- ized air from the spray gun.

Abrasive for Precision Surface Treatment U.S. Patent $711,773. Jan. 27, 1998 0. V: Selifanov et al, assignors to Ptasmoteg Engineedng Center, and TEGO Scientific and Engineering Center of Physics and Technology of Thin Films, Minsk, Belarus

A method of manufacturing an abrasive material comprising evacuating a deposi- tion chamber and depositing a diamondlike carbon-based material on a substrate using a vacuum plasma deposition process.

Silicon Carbide Abrasive Wheel U.S. Patent 5,711,774. Jan. 27, 1998 D.A. Sheldon, assignor to Norton Co., Worwter, Mass.

An abrasive grinding wheel comprising silicon carbide abrasive grain, 5 to 21% by volume hollow ceramic spheres, and a vit- reous bond.

Abrasive Articles U.S. Patent 5,711&O. Jan. 27, 1998 J.S. Johnson, assignor to Northeast Abrasives, Diamond and Tools Corp., Essex, Conn.

A method of forming an abrasive article, which comprises the steps of providing strips of fiber; conveying a first of the strips through a binder; depositing abrasive particles of a major cross-section dimen- sion greater than the thickness of the strips onto the first strip: and laminating a plural- ity of strip sections under sufficient pres- sure to force the abrasive particles into the interstices of the abrasive particles of an ad,jacent section.

Radiation-Cured Coating System U.S. Patent 5,711,993. Jan. 27, 1997 M.M. Lein et a/., assignors to Textron Automotive Interiors Inc., Troy Mich.

A process for manufacturing a metal- lized substrate comprising depositing a first coating layer containing a radiation-curable nonvolatile film former; vacuum deposit- ing a layer of metal material to form a discontinuous film covering the first coat- ing layer including a plurality of discrete islands appearing macroscopically as a continuous film and having a plurality of macroscopically unobservable channels be-

74 METAL FINISHING . AUGUST 1998