Electroless plating process

having a pH buffering action in a pH range of 2-6 in a bath containing only zinc to an acidic zinc-chromium composite plating bath containing zinc ions and trivalent chromium ions to prepare a plating bath, said salt having a pH buffering action suppressing an increase in pH at the cathode boundary, thereby suppressing the formation of hydroxide; and electroplating film on a steel sheet using the resultant plating bath.

Metallization of Nonconductive Substrates U.S.Patent 5,421,989. June 6, 1995 L. Stamp et al, assignors to Atokxh

Deutschland

G&H, Germany

A process for applying a principal metal coating to a nonconductive substrate without employing an electroless coating, comprising contacting with a suspension comprising a noble metal colloid suspended in a polymer matrix to obtain a coated substrate; removing at least part or substantially all of the polymer matrix from the coated substrate with a solution of a chalcogen that does not form chalcogenides of the noble metal; and electrolytically coat-

ing the substrate obtained with a solution of the principal metal coating.

Zinc or Zinc Alloy Plating Bath U.S. Patent 5,421,990. June 6, 1995 E. Hahn et al, assignors toBASF AG, Ludwigshaien,

to 100 g/L of platinum in the form of Pt(OH), complex ion and at least one of tin, zinc, and palladium in an amount of 1 mg/L or more.

Photoresist Waste Treatment

Germany

A process for the production of shiny shaped articles coated with zinc or a zinc alloy by electrodeposition from acidic aqueous electrolytic baths, which contain as essential components one or more zinc salts and, in the case of the alloy, one or more sakof an alloy metal, one or more conducting salts, one or more surfactants, and one or more brighteners.

Platinum Alloy Electrodeposition Bath U.S. Patent $421,991. June 6, 1995 S. Yafita, assignor to E/ectfop/ating Engineers of Japan ltd., Japan

In a process for manufacturing a platinum alloy product by electrodepositing platinum alloys upon the surface of an object, the improvement which comprises using an electrodeposition bath comprising 2

U.S. Patent 5,422,032.June 6, 1995 J.A. Brown, assignor fo Wdron Ltd. Partnership, Carol Sheam, 111.

A method and composition for waste treatment of organic strippers containing metals.

Electroless Plating Process U.S. Patent 5,422,142. June 6, 1995 C-H. Hsu, assignor to E./. Du font de Nemours and Co., Wilmington, De/.

In a process for electrolessly plating aramid fibrids with a durable metal coating comprising the steps of contacting the fibrids to be plated with a sensitizing solution, rinsing the fibrids, and immersing the fibrids in a solution of metal cations to be plated; the improvement, which comprises contacting the aramid fibrids with an aqueous solution consisting essentially of 80 to 90% sulfuric acid for 2 to 60 set at a temperature in the range from 10 to 1OO’C;

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Selective SR-3 Au, Ag, Pt Recovery SR-4 Hg Removal, and Ag Recovery SR-5 Cu>Pb>Ni Selective Removal SR-8 Chelated Cu Recovery and Removal SR-9 Complexed metal removal SR-10 Pb Removal from Potable Water SR-12 Fe, Zn, Co Recovery from acidic solutions Standard NM60 Mixed Bed for DI water production C-267 Cu, Pb, Ni Recovery from DI Rinses For complete information on these and other ion exchange resins contact us at:

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and washing the acid-contacted fibrids with water until substantially all of the acid is removed before contacting the fibrids to be plated with the sensitizing solution.

Powder Coating Process U.S.Patent 5,422,146.June 6, 1995

H. Adams, assignor to Wagner international Alsfaften, Switzerland

AG,

A process of powder coating of workpieces, comprising coating with powder so that the powder adheres to the workpiece; irradiating a defined surface portion of the workpiece with electromagnetic radiation to an extent such that powder particles of the powder within the defined surface portion stick together and stick to the workpiece; removing powder that adheres to the workpiece located outside the defined surface portion; and baking the workpiece in an oven.

Electrodeposition Coating Composition U.S.Patent 5,422,222.June 6, 1995 Y. Akaki et al, HYW,

assignors

to

Kansai Paint Co. Ltd.,

Japan

A positive-type photosensitive trodeposition coating composition

eleccom-

prising an admixture of a photosensitive compound or a photosensitive copolymer having a molecular weight of not more than 3000 and containing at least one modified quinonediazidesulfonic acid unit.

rorubber of at least one adhesion-preventing material selected from the group consisting of a plasticizer, a bulk filler, a coloring agent, an acid acceptor and, optionally, a cross-linking agent, and heating at 60 to 130°C to effect leveling and optionally heating at 140 to 2OO’C to crosslink the fluororubber, wherein the substrate is not deformed.

Heat-Resistant Coating Powder U.S.Patent 5,422,X%. June 6, 1995 A.T. Daly and LT. Grundowski, lnfernafional Inc., Chicago

assignors to Morton

A coating powder, comprising between 20 and 83% of a silicone resin having organic moieties selected from the group consisting of aryl and C,-C, alkyl; between 17 and 80% based on resin of an acrylic resin; and an acid-reactive cross-linking agent.

Laser Disk Buffing Apparatus U.S. Patent 5,423,103. June 13, 1995 J. Born, assignor to Machine Research Corp., Chicago

Apparatus for buffing a circular laser disk having a central area, a circular outer edge, and a surface therebetween, the apparatus comprising means for supporting the laser disk; means for rotating in a first plane about a first axis; means for buffing including a buffing wheel having an outer rim and adapted to rotate in a second plane about a second axis, said second plane being substantially perpendicular to the first plane; means for rotating the buffing wheel; and means for selectively positioning the buffing wheel in engagement with the laser disk.

Powder Coating Composition U.S. Patent 5,422,145. June 6, 1995 N. Jomihashi et al., assignors to Daikin lnduskies Ltd., Osaka, Japan A method for coating an article with a fluororubber comprising applying on a substrate a fluororubber-containing powdery composition, which is prepared by freeze pulverization, comprising 0.05 to 10% by weight based on the weight of the fluo-

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