ions; adjusting the solution to a tempera­ture range of about 60 to 160°F; immersingthe substrate in the solution; and electro­plating copper onto the substrate.

Protective Coatingu.s. Patent 5,750,190. May 12, 1998E W. Woodhall, Los Altos, Calif. andN. Kondrats,Goleta, Calif.

A composition for the temporary protec­tion of portions of a motor vehicle surfacefrom paint comprising between 1 to 30%polyvinyl alcohol by weight; a surfactantcomposition present in an amount effectiveto produce a coating that lays out smoothlyin a substantially continuous thin film; atleast 0.1% of a plasticizer; and at least 60%water by weight.

Method of Preventing Corrosionof Metals Using Silanesu.s. Patent 5,750,197. May 12, 1998w.J. van Ooij et al., assignors to The University ofCincinnati, Cincinnati

A method of treating a metal substrate toimprove corrosion resistance, comprisingapplying a coating of a first treatment so­lution directly onto the surface of the metal,said first treatment solution consisting es­sentially of at least one multifunctional si­lane having at least two trisubstituted silylgroups wherein the substituents are indi­vidually chosen from the group consistingof alkoxy and acetoxy, wherein the multi­functional silane has been at least partiallyhydrolyzed, and wherein the solution has apH of less than 7.

Prepainting Treatment forPlasticsu.s. Patent 5,750,198. May 12, 1998O. Furuyama et al., assignors to Henkel Corp.,Plymouth Meeting, Pa.

A process for treating a surface of a plasticmaterial by contacting with an aqueous solu­tion consistingessentiallyof water and a totalof at least 0.05% by weight of one or moreacids selected from the group consisting ofcarboxylic acids that do not contain any ter­minal alkyl group in their molecular struc­tures, and hydroxycarboxylic acids that donot contain any terminal alkyl group in theirmolecular structures; and optionally, one ormore of a component selected from acids thatare not part of the first component and acomponent of surfactants.

Coating Compositionu.s. Patent 5,750,595. May 12, 1998K.S. Arora andM.S. Wiggins, assignors to HenkeiCorp., Plymouth Meeting, Pa.

A self-dispersing, curable epoxy resincomposition comprising the addition prod­uct of reactants comprising a reactiveequivalent of an epoxy resin; 0.01 to 1.0

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reactive equivalents of a polyhydric phe­nol; and 0.005 to 0.5 reactive equivalentsof an amine-epoxy adduct.

Cathodic ElectrocoatingCompositionu.s. Patent 5,750,596. May 12, 1998A. Gam, assignor to EI. du Pont de Nemours andCo., Wilmington, Del.

An improved cathodic electrocoatingcomposition comprising an aqueous carrierhaving dispersed therein a film formingbinder comprising an epoxy-amine adductand a blocked polyisocyanate crosslinkingagent; wherein the improvement consistsessentially of an anticrater agent, whichconsists of a silane-terminated reactionproduct of reactants consisting of a poly­oxy alkylene diamine and an isocyanatoalkyl alkoxy silane.

Coating Compositionu.s. Patent 5,750,624. May 12, 1998S. Miyazoe et al., assignors to Nippon Paint Co.Ltd., Osaka, Japan

A curable resin composition comprising5 to 80% by weight of a polymer contain­ing free and esterified carboxyl groups; I to80% of a hydroxyl group and epoxy groupcontaining polymer having an epoxy equiv­alent of 200 to 1,000; and I to 50% of analkoxyl group containing silicone polymer.

Polydiene Coating Compositionu.s. Patent 5,750,627. May 12, 1998D.J. St. Clair, assignor to Shell OilCo., Houston

A crosslinkable composition comprisingfrom 10 to 80% by weight of a hydroxy­functional polydiene polymer having afunctionality of at least 1.3, from 8 to 60%of an amino resin crosslinking agent, and 2to 40% of a reinforcing agent.

Precision Cleaning and DryingApparatusu.s. Patent 5,752,532. May 19, 1998R.S. Schwenkler, Boise, Idaho

An apparatus for drying cleaning solventor water off an object, the apparatus havinga vacuum tight process vessel for holdingan object to be dried; the vessel including acloseable opening therein and an outlet fordraining fluid from the vessel; vapor distri­bution means located within the vessel fordistributing vapor therein; and a vapor gen­erator being located outside of the vesseland in fluid communication with the vapordistribution means for generating a vaporof a drying fluid, which is soluble in wateror the cleaning solvent.

Powder Pumping Systemu.s. Patent 5,752,788. May 19, 1998G. W. Crum, assignor to Nordson Corp., Westlake,Ohio

A constant volume conveying systemadapted for pumping powder to a spray guncomprising an outlet tube having an inlet atone end to receive a pressurized air stream,an outlet at an opposite end, and a powderinlet between to receive metered powderfrom a reservoir; an expansion nozzle forconnection to a source of pressurized air;and a system for metering into the airstream; said expansion nozzle having anincluded angle of less than 19°.

Flap Disk Abrasive ToolU.S. Patent 5,752,876. May 19, 1998F.J. Hettes, assignor to Weiler Brush Co. Inc.,Cresco, Pa.

A flap disk for use with a surface finishingtool, the tool having a drive shaft for trans­mitting rotary motion to the disk, wherein thedisk comprises a backing plate for attachingto and being rotated by the drive shaft; and aplurality of abrasive flaps.

Flexible Support forElectrostatic Paintingu.s. Patent 5,753,042. May 19, 1998R.O. Bauer, assignor to Hi-Tech Flexible ProductsInc., Jackson, Mich.

A flexible support for mounting parts tobe electrostatically painted upon an electri­cally charged rack comprising, in combina­tion, a first flexible nonmetallic electricallyconductive portion and a second flexiblenonmetallic deformable portion of nonelec­trically conductive material.

Sputter Coating Stationu.s. Patent 5,753,089. May 19, 1998W. Haag, assignor to Balzers AG, Furstentum,Liechtenstein

A process for sputter coating workpiecescomprising holding a workpiece in a coatingchamber by means adapted to pass throughan opening in a first sputter source in thechamber; exposing the workpiece, except fora mounting region for holding the workpiece,to coat the workpiece by material sputteredfrom the first sputter source; and providing afurther sputter source, which is opposite thefirst source in the chamber.

Plating Apparatusu.s. Patent 5,753,096. May 19, 1998R.F. Zecher, assignor to Tumbleveyor Inc.,Huntingdon Valley, Pa.

A method of plating metal objects byimmersing them within a reservoir of anelectrolytic solution containing ions of aplating metal and providing a belt-typeconveyor in the upper portion of the reser­voir; said belt-type conveyor including aloading zone for receiving objects to betreated towards one end thereof and a dis­charge zone for the discharge of treatedobjects towards the other end.

METAL FINISHING • OCTOBER 1998