A process for electroless copper coating on a substrate comprising alkaline cleaning and condition- ing for a dwell time of 4.5 to 5.5 min; rinsing with reverse osmosis water; preconditioning in a stan- nous chloride solution from 0.75 to 1.5 min; treating with a tin- palladium colloid; postactivating with a solution to remove tin from the tin-palladium colloid from 2.75 to 3.25 min; and applying electroless copper in solution, which solution has been used less than about one week.

ZINC-PLATED STEEL SHEET

U.S. Patent 5,849,423. Dec. 15, 1998 T. Urakawa et al., assignors to NKK Corp., Tokyo

A zinc-plated steel sheet compris- ing a steel sheet; a zinc plating

layer formed on the steel sheet; and an Fe-Ni-0 film having an island form or a mosaic form and a coating weight of 10 to 1,500 mg/m’ in terms of the total weight of metallic elements with a cover- age of surface coating of 30 to 90%.

HOT-DIP ZINC PLATING PROCESS

U.S. Patent 5,849,408. Dec. 15, 1998 N. Sugawara, assignor to Nippon Mining & Metals Co. Ltd., Tokyo

A hot-dip zinc-plated steel com- prising a rimmed steel and a hot- dip zinc plating layer formed by a successive two-stage hot-dip gal- vanizing, wherein in a first stage hot-dip zinc plating step, a plating bath consists of zinc of 99.7% pu- rity by weight or more and 0.05% by weight or less of Al, and has a

FOR METALS RECOVERY choose

IONAC’= ION EXCHANGE RESINS

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Selective W-3 Au, Ag, Pt Recovery SR-4 Hg Removal, and Ag Recovery SR-5 Cu>Pb>Ni Selective Removal SF?-8 Chelated Cu Recovery and Removal SR-10 Pb Removal from Potable Water SR-12 Fe, Zn, Co Recovery from acidic solutions

Standard NM80 Mixed Bed for DI water production C-267 Cu, Pb, Ni Recovery from DI Rinses

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Circle 056 on reader information card

temperature of 463 to 481°C and wherein a dipping time of the steel in the plating bath is from 1 to 1.5 min; and in a second stage hot-dip zinc plating step, a plating bath consists of zinc of 99.7% pu- rity by weight or more and from 2 to 10% by weight of Al, and has a temperature of from 422 to 425°C and wherein a dipping time of the steel in the plating bath is from 0.5 to 1.5 min.

COATED ABRASIVE BACKING

U.S. Patent 5,849,646. Dec. 15, 1998 G.M. Stout et al., assignors to 3M Co., St. Paul, Minn.

A coated abrasive article compris- ing a backing having a front sur- face comprising a mixture or blend of a thermoplastic binder material; a fibrous reinforcing

Circle 068 on reader information card

78 Metal Finishing

material; and a toughening agent; Zndustries Inc., Pittsburgh

a first adhesive layer present on A film-forming coating composi- the front surface of the backing; tion comprising a hydroxyl-con- and a plurality of abrasive parti- taining acrylic solution polymer cles embedded in the first adhe- and a polyisocyanate crosslinking sive layer. agent.

CLEANEWDEGREASER CONCENTRATE

U.S. Patent 5,849,682. Dec. 15, 1998 D.N. Van Eenam, Des Peres, MO.

A substantially nonaqueous con- centrate for use in preparing a stable, aqueous cleaneridegreaser composition in the form of a to- tally water-soluble solution com- prising a sparingly water-soluble organic solvent, which is dipro- pylene glycol mono n-butyl ether; a solubilizing additive consisting of 0.1 to 100% by weight of a sur- factant and up to 99.9% of a cou- pler, said solubilizing additive be- ing present in an amount of approximately 3 to 15% by weight excess over that minimally re- quired to form a clear solution when the concentrate is combined with water; and not more than 10.0% of water.

POWDER COATING GUN

U.S. Patent 5,850,976. Dec. 22, 1998 M.A. Robidoux, assignor to The Eastwood Co., Maluern, Pa.

A gun for spraying a powder onto a workpiece to form a coating in- cluding means for manipulating the gun and for controlling a flow of air from a pressurized source through the gun.

STRUCTURED ABRASIVE ARTlCLE

U.S. Patent 5,851,247. Dec. 22, 1998 W.L. Stoetzel et al., assignors to 3M Co., St. Paul, Minn.

An abrasive article comprising

AGUEOUS CLEANING

COMPOSlTlON

Webster Pumps Don’t Just stand UD To Corrosive Chemicals,

They Stand The Tesl Of Time. U.S. Patent 5,849,683. Dec. 15, 1998 F.R. Cala and R.A. Reynolds, assignors to Church & Dwight Co. Inc.

An aqueous cleaning composition capable of substantially removing industrial-type soil contaminants from a substrate comprising an aqueous portion and an active- ingredient portion consisting of an alkalinity-providing agent and a mixture with an active concen- tration of an ethoxylated CL-,, al- kanol surfactant and an active concentration of at least one ami- nocarboxylic acid surfactant.

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Polypropylene or PVDF (Solef9 with non-metallic construction so that no metal parts come in contact with

corrosive chemicals. Dependable and cost-effective, Webster Pumps can handle applications ranging from 5 to over 100 gallons per minute.

For the name of a Webster Pumps distributor or to discuss your

specific application requirements, call l-800-766-1950.

ULTRADURABLE GLOSSY COATlNG COMPOSlTlON

U.S. Patent 5,849,835. Dec. 15, 1998 SK. Das et al., assignors to PPG

Webster Pumps” Distributor Territories Available.

Circle 064 on reader information card

precisely shaped abrasive com- posites adhered to a major sur- face of a backing, wherein the abrasive composites provide an enhanced cut rate for a mild steel workpiece in the absence of a grinding aid.

METROD OF NONHAZARDOUS

REMOVAL OF PAINT

U.S. Patent 5,851,278. Dec. 22, 1998 R.R. Stanforth and P.V. Knopp, assignors to RMT Inc., Madison, Wis.

A coating preparation, which when applied to paint containing heavy metal renders the paint nonhazardous, comprising 5 to 50% by weight of a phosphate compound; 5 to 30% of a buffering compound; and a carrier for the phosphate compound.

August 1999 79