plex with the metal ions, the complexing agent being present in greater than equimo- lar amount with respect to metal ion con- centration, the polyamine being added in an amount from 0.1 to 0.5 times the metal concentration, the amount of polyamine being effective to release the metal ions from the metal complex; and contacting the aqueous solution with a cation exchanger.

Water-Based Coating Composition U.S. Patent 5500,246. March 19, 1996 K. Morizono and T: Harada, bofh c/o Mitsui Pefrochemical lndusfries Ltd., Chiba, Japan

A resin composition for water-based coating, which is a resin mixture consisting essentially of a reaction product of an aro- matic polyol resin and a carboxyl group containing acrylic resin; an aromatic epoxy resin; and an aromatic polyol resin.

Substrate-Reactive Coating Composition U.S. Patent 5,500,253. March 19, 1996 ML Sanduja et a/., assignors to James A. Bolton, Sfrafford, Conn.

A process for forming a protective coat- ing, bonded to a surface comprising apply- ing a coating composition to the surface and drying the coating, said coating com- position being an aqueous dispersion com- prising a mixture of a water-dispersible polymer selected from the group consisting of acrylic polymers, urethane polymers, and mixtures thereof; at least one polyeth- ylenically unsaturated monomer; an at least partially water-soluble free radical poly- merization catalyst; and a source of cat- ions, said coating composition containing 40 to 85% by weight water.

Paint Arrestor U.S. Patent 5,500,271. March 19, 1996 R.M. Pasch and K.C. Langenecker, assignors to Research Products Corp., Madison, Wis.

A paint arrestor for absorbing paint overspray comprising a series of layers of sheet material, each of the layers being slit and expanded to define an array of air spaces distributed in columns, said air spaces alternating in size from column to column and repeating in size in every other column; and means for securing the layers

in contiguous, overlying relationship with one another.

Abrasive Articles Comprising Precisely Shaped Particles U.S. Patent 5,500,273. March f9, 1996 G.L. Holmes et al, assignors to 3M Co., St. Paul, Minn.

An abrasive article comprising a plural- ity of precisely shaped composites and a bonding medium wherein the precisely shaped composites comprise a plurality of abrasive grits and a polymeric binder, wherein the precisely shaped composites are bonded together by means of the bond- ing medium to form a shaped mass or wherein the precisely shaped composites are distributed within a nonwoven web and bonded to the web fibers by means of the bonding medium.

Aluminum Conversion Coating U.S. Patent 5,500,288. March 19, 1996 Y lsobe and H. Mizuno, assignors to Nippondenso Co. Ltd., Kariya, Japan

A corrosion-resistant chemical conver- sion coating formed on a surface of an

hccause PVN lahl over twice as long ~1s platinkd tit;rnium < > niobium is three times more con ductivc th;m titnnium. thcwt’orr better current dklribution ;Ind less powu consumption < s Pt clnd is ;rwil;rhle in I25 8 Xl mlcroinches mesh nnd solid. sin& nnd double sided c > tell us your specifkxtion nnd WC f:w you quote with dr:wine

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ULTRAPHOP 1202 Nickel Free Zinc Phosphate Zinc, Iron, Manganese Phosphates for Iron & Steel

ULTRAMATE@ OILS Emulsion & Solvent Type

MAKERCLEAN” CLEANERS Immersion or Spray for Iron, Steel & Aluminum

ALTRASEAL” ORGANICS Water based dip-spin & spray coatings

132 METAL FINISHING ?? NOVEMBER 1996

aluminum substrate, comprising a basic double salt including aluminum ions, at least one salt selected from the group con- sisting of sulfates of alkali metal ions or alkaline earth metal ions, at least one or- ganic compound selected from the group consisting of sodium mercaptobenzothiaz- ole. oxine, and sodium benzoate, wherein the coating has a thickness of not less than 0. I pm; said conversion coating being pre- pared from an aluminum treating aqueous solution comprising sulfates of the alkali metal ions or alkaline earth metal ions at a concentration of 0.001 to 5 M, and the organic compound at a concentration of 0.001 to 5 M.

Composition for Electroless Metallization U.S. Patent 5,500,315. March 19, 1996 J.M. Calvei? et al, assignors fo Rohm & Haas Co., P hliadelphia

.4n article of manufacture comprising an electroless metal deposit in an image pat- tern on a substrate, said substrate, at least where coated with the metal deposit, hav-

ing bonded to its surface one or more mul- tidentate chemical groups ligated by coor- dination bonding other than by electrostatic interaction with a substantially tin-free, electroless metallization catalyst.

Autodeposition Bath U.S. Patent 5,500,460. March 19, 1996 6. M. Ahmed et al, assignors to He&e/ Corp., Plymouth Meeting, Pa.

An autodeposition bath composition suitable for depositing a coating on an ac- tive metal surface of solid objects having surfaces constituted predominately of ac- tive metals contacted with the composition, consisting essentially of a mixture of I to 20% by weight of an epoxy resin compo- nent; an emulsifying component consisting essentially of anionic surfactant; 0.1 to 20% by weight of a crosslinking compo- nent; an accelerator in sufficient amount to cause the dissolution of active metals from solid objects; and, optionally, pigments, dyes, or other chemically stable colorant materials; finely divided solids suitable as

High Efficiency Dry Scrubber Meets Strict Regulations for Hexavalent Chrome Mist Removal I Low maintenance I Corrosion resistant I500 to 65,000 cfm I Retrofit existing systems ??Horizontal &vertical

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fillers in the coatings to be formed from the composition: and water to form the balance of the composition.

Can Coating US. Patent 5,500,463. March 19, 1996 S. Nishimura ef al., assignors to Nippon Paint Co ltd., Osaka, Japan

An aqueous resin composition compris- ing a base material comprising an acrylic resin and an epoxy resin wherein the acrylic resin has an acid value greater than 0 to 30, and wherein the epoxy resin is partially reacted to the acrylic resin.

Cleaning Apparatus U.S. fafent 5,501,240. March 26, 1996 T. Dohku et al, assignors to Hitachi Zosen Corp., Osaka, Japan

A cleaning apparatus comprising a first tank having a bubbling device disposed in the bottom, and a spray nozzle located above; a second tank having an ultrasonic

Sonicor precision cleaning systems combine the latest in ultrasonic cleaning technology with

performance while eliminating CFC’s from the workplace.

Sonicor manufactures a wide range of equipment for all applications. SONICOR IMMERSIBLES - When the use of transducerized tanks is not practical.

Lead Zirconate-Titanate Sandwich Transducers Stainless Steel Construction Sweep or Resonant Frequency Generator

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METAL FINISHING . NOVEMBER 1996