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Regeneration of copper etchant
PATENTS GRANTED 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, D.C. 20231.
Basecoat/Clearcoat U.S. Patent 5,523,164. June 4, 1996 K. Shibato et aL, assignors to BASF Lacke + Farben AG, Muenster-Hiltrup, Germany A method for forming a paint film comprising applying a basecoat including a coloring and then applying a clearcoat paint and subsequently curing the basecoat and clearcoat simultaneously by heating, wherein the clearcoat paint includes a resin component comprising a copolymer of a vinyl monomer mixture containing at least 20% by weight cycloalkyl esters of acrylic acid or methacrylic acid 40-90% by weight, an alkyl-etherified melamine resin 5-50%, and blocked polyisocyanate compounds 5-50%, and the basecoat paint includes a resin component comprising a copolymer of a vinyl monomer mixture containing at least 10% by weight monomers, an alkyl-etherified melamine resin 10-50%, blocked polyisocyanate compounds 0-40%, a cellulose resin 0-20%, and crosslinked organic fine particles having a particle size of 0.01-5 ~am 0-30%.
Waterborne Epoxy U.S. Patent 5,523,336. June 4, 1996 P. Schreiber et aL, assignors to Herberts GmbH, Wuppertal, Germany An aqueous one-component coating composition for repair of plastic substrates.
In-Mold Coating U.S. Patent 5,523,337. June 4, 1996 K.G. Banerjee et al., assignors to GenCorp Inc., Fairlawn, Ohio A thermosetting coating composition comprising at least one polymerizable vinyl ester resin; 80 to 200 parts by weight of at least one copolymerizable ethylenically unsaturated monomer; 5 to 90 parts by weight of a low profile additive; an effective amount of a mold release agent; and one or more block copolymers.
Powder Coating Composition U.S. Patent 5,523,349. June 4, 1996 Y. Shiomi et aL, assignors to Nippon Paint Co. Ltd., Osaka, Japan A powder coating composition comprising acrylic resin as a main component comprising at least about 40% by weight of a METAL FINISHING
• M A R C H 1997
glycidyl-group-containing monomer; a surface modifier; and polyvalent carboxylic acid.
Resin Composition for Aqueous Coating U.S. Patent 5,523,363. June 4, 1996 T. Fujibayashi and H. Nagaoka, assignors to Kansai Paint Co. Ltd., Hyogo, Japan A resin composition for aqueous coating characterized by comprising as the main components a resin obtained by reacting an epoxy having at least three epoxy group containing functional groups and an epoxidized novolac-substituted phenolic resin.
Method for Shrinking Nickel Electro forms U.S. Patent 5,524,342. June 11, 1996 E.A. Swain et aL, assignors to Xerox Corp., Stamford, Conn. A method comprising heating a portion of an electroformed hollow cylinder, wherein the cylinder is comprised of nickel and possesses an internal stress sufficient to shrink the diameter of the cylinder upon application of heat, thereby shrinking the diameter of the heated portion; and positioning a part of a member in the portion of the cylinder to be subjected to the heating prior to the shrinkage of the cylinder portion, wherein subsequent to the heating the inner surface of the shrunken cylinder portion contacts the outer surface of the member part.
Automotive Paint Booth U.S. Patent 5,524,395. June 11, 1996 M. Boiron, assignor to Omia, Saint Yrieix, France A painting booth with one end having an opening through which a vehicle can pass; at least one door for closing the opening when a vehicle is enclosed in the booth; a dual section ramp always contained entirely within the booth; a first space existing between a lower surface of the ramp and the underlying booth floor; a hinge connecting the fixed section to the moveable section; and a seal extending along the hinge to prevent circulation between a space portion under the moveable section and the space portion under the fixed section.
Etching Apparatus U.S. Patent 5,524,654. June 11, 1996 T. Nakano, assignor to Kabushi Gaisha Ishfi Hyoki, Hiroshima, Japan An etching, developing, and peeling apparatus for a printed board, the apparatus being provided a fixed height above a conveyor device having a plurality of juxtaposed shafts and rubber rollers ranked on each shaft at suitable intervals in a lengthwise direction so as to carry a printed board in a horizontal posture.
Regeneration of Copper Etchant U.S. Patent 5,524,780. June 11, 1996 G.A. Krulik et aL, assignors to Applied Electroless Concepts Inc., San Clemente, Calif. A method for the purification of spent ammoniacal alkaline copper etchant containing more than a desired amount of copper in solution, which comprises diluting the spent ammoniacal etchant with substantially identical fresh ammoniacal copper etchant containing little or no copper; contacting the diluted spent etchant with at least 20% of the stoichiometric quantity of aluminum metal to react with and precipitate at least some of the copper; allowing the reaction to continue to reduce the amount of copper to less than half of the initial amount; separating the purified etchant solution from the solid copper and aluminum hydroxide precipitates formed by the same reaction, thereby forming a separated ammoniacal etchant solution; treating the separated etchant solution with suitable additions of an additional solution to reconstitute the pH, specific gravity, and chemical composition, thereby forming an ammoniacal alkaline copper etchant suitable for reuse.
Cleaning Apparatus U.S. Patent 5,525,093. June 11, 1996' C.E. Palmer, assignor to Westinghouse Electric Corp., Pittsburgh A method for cleaning the surface of an object comprising subjecting a portion of liquified carbon dioxide contained in a storage vessel to adiabatic expansion to produce a solid phase carbon dioxide; compressing the solid phase carbon dioxide to form a plurality of pellets; producing a first volume of gaseous carbon dioxide at above atmospheric pressure by passing a portion of the liquified carbon dioxide through a 87
Basecoat/Clearcoat U.S. Patent 5,523,164. June 4, 1996 K. Shibato et aL, assignors to BASF Lacke + Farben AG, Muenster-Hiltrup, Germany A method for forming a paint film comprising applying a basecoat including a coloring and then applying a clearcoat paint and subsequently curing the basecoat and clearcoat simultaneously by heating, wherein the clearcoat paint includes a resin component comprising a copolymer of a vinyl monomer mixture containing at least 20% by weight cycloalkyl esters of acrylic acid or methacrylic acid 40-90% by weight, an alkyl-etherified melamine resin 5-50%, and blocked polyisocyanate compounds 5-50%, and the basecoat paint includes a resin component comprising a copolymer of a vinyl monomer mixture containing at least 10% by weight monomers, an alkyl-etherified melamine resin 10-50%, blocked polyisocyanate compounds 0-40%, a cellulose resin 0-20%, and crosslinked organic fine particles having a particle size of 0.01-5 ~am 0-30%.
Waterborne Epoxy U.S. Patent 5,523,336. June 4, 1996 P. Schreiber et aL, assignors to Herberts GmbH, Wuppertal, Germany An aqueous one-component coating composition for repair of plastic substrates.
In-Mold Coating U.S. Patent 5,523,337. June 4, 1996 K.G. Banerjee et al., assignors to GenCorp Inc., Fairlawn, Ohio A thermosetting coating composition comprising at least one polymerizable vinyl ester resin; 80 to 200 parts by weight of at least one copolymerizable ethylenically unsaturated monomer; 5 to 90 parts by weight of a low profile additive; an effective amount of a mold release agent; and one or more block copolymers.
Powder Coating Composition U.S. Patent 5,523,349. June 4, 1996 Y. Shiomi et aL, assignors to Nippon Paint Co. Ltd., Osaka, Japan A powder coating composition comprising acrylic resin as a main component comprising at least about 40% by weight of a METAL FINISHING
• M A R C H 1997
glycidyl-group-containing monomer; a surface modifier; and polyvalent carboxylic acid.
Resin Composition for Aqueous Coating U.S. Patent 5,523,363. June 4, 1996 T. Fujibayashi and H. Nagaoka, assignors to Kansai Paint Co. Ltd., Hyogo, Japan A resin composition for aqueous coating characterized by comprising as the main components a resin obtained by reacting an epoxy having at least three epoxy group containing functional groups and an epoxidized novolac-substituted phenolic resin.
Method for Shrinking Nickel Electro forms U.S. Patent 5,524,342. June 11, 1996 E.A. Swain et aL, assignors to Xerox Corp., Stamford, Conn. A method comprising heating a portion of an electroformed hollow cylinder, wherein the cylinder is comprised of nickel and possesses an internal stress sufficient to shrink the diameter of the cylinder upon application of heat, thereby shrinking the diameter of the heated portion; and positioning a part of a member in the portion of the cylinder to be subjected to the heating prior to the shrinkage of the cylinder portion, wherein subsequent to the heating the inner surface of the shrunken cylinder portion contacts the outer surface of the member part.
Automotive Paint Booth U.S. Patent 5,524,395. June 11, 1996 M. Boiron, assignor to Omia, Saint Yrieix, France A painting booth with one end having an opening through which a vehicle can pass; at least one door for closing the opening when a vehicle is enclosed in the booth; a dual section ramp always contained entirely within the booth; a first space existing between a lower surface of the ramp and the underlying booth floor; a hinge connecting the fixed section to the moveable section; and a seal extending along the hinge to prevent circulation between a space portion under the moveable section and the space portion under the fixed section.
Etching Apparatus U.S. Patent 5,524,654. June 11, 1996 T. Nakano, assignor to Kabushi Gaisha Ishfi Hyoki, Hiroshima, Japan An etching, developing, and peeling apparatus for a printed board, the apparatus being provided a fixed height above a conveyor device having a plurality of juxtaposed shafts and rubber rollers ranked on each shaft at suitable intervals in a lengthwise direction so as to carry a printed board in a horizontal posture.
Regeneration of Copper Etchant U.S. Patent 5,524,780. June 11, 1996 G.A. Krulik et aL, assignors to Applied Electroless Concepts Inc., San Clemente, Calif. A method for the purification of spent ammoniacal alkaline copper etchant containing more than a desired amount of copper in solution, which comprises diluting the spent ammoniacal etchant with substantially identical fresh ammoniacal copper etchant containing little or no copper; contacting the diluted spent etchant with at least 20% of the stoichiometric quantity of aluminum metal to react with and precipitate at least some of the copper; allowing the reaction to continue to reduce the amount of copper to less than half of the initial amount; separating the purified etchant solution from the solid copper and aluminum hydroxide precipitates formed by the same reaction, thereby forming a separated ammoniacal etchant solution; treating the separated etchant solution with suitable additions of an additional solution to reconstitute the pH, specific gravity, and chemical composition, thereby forming an ammoniacal alkaline copper etchant suitable for reuse.
Cleaning Apparatus U.S. Patent 5,525,093. June 11, 1996' C.E. Palmer, assignor to Westinghouse Electric Corp., Pittsburgh A method for cleaning the surface of an object comprising subjecting a portion of liquified carbon dioxide contained in a storage vessel to adiabatic expansion to produce a solid phase carbon dioxide; compressing the solid phase carbon dioxide to form a plurality of pellets; producing a first volume of gaseous carbon dioxide at above atmospheric pressure by passing a portion of the liquified carbon dioxide through a 87