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Terpene-based solvents
assignors to Lacks Industries Inc., Grand Rapids, Mich.
A method of electroplating an impact-resistant plastic article comprising providing a substrate of a polycarbonate, which has been modified with between 15 and 50% by weight of acrylonitrileb u t a d i e n e - s t y r e n e ; conditioning with a halogenated organic solvent at a temperature no higher t h a n 120°F, said organic solvent conditioner consisting of between 5 and 25% by volume of a halogenated hydrocarbon in an aqueous medium chosen from the group consisting of alcohols, ketones, and ethers; rinsing; etching with an acidic solution at at 140 to
180°F for up to 10 min sufficient to roughen the conditioned surface, wherein the acidic solution is an aqueous sulfuric acid having a normality of 10.5 to 11.0 and then adding to each gallon of solution 3.5 to 4.0 pounds of chromic acid; rinsing; neutralizing in a bath maintained at about 100 to 120°F for 0.5 to 2.0 min; rinsing; catalyzing in a solution comprising between 20 to 50 ppm palladium at 80 to 90°F for 2 to 4 min; accelerating in a solution comprising sulfuric acid and complexers to neutralize the effect of contaminates at 110 to 140°F for one-half to 3 min; electrolessly depositing a layer of a metal strike; and elec-
Brooktronics manufacturers over 60 plating solutions and strives to manufacture new products to meet the demands of an industry that is always changing. Here are two of our latest solutions to meet industry demands. BEC 455 Zinc-Tin for the repair of IVD Aluminum, exceeding the requirements of MIL-C-83488C. BEC 455 also exceeds the requirements of QQ-P-416 Type I & II for Cadmium repair. Since BEC 455 is a Low Hydrogen Embrittlement solution it does not require a post plate bake.
trochemically plating a metal onto the metal strike. POLYURETHANE POWDER COATING
U.S. Patent 5,847,044. Dec. 8, 1998 H-J. Laas et al., assignors to Bayer AG, Leverskusen, Germany
A polyurethane powder coating composition with a low stoving temperature. TERPENE-BASED SOLVENTS
U.S. Patent 5,847,247. Dec. 8, 1998 A.J. Conte et al., assignors to Arizona Chemical Co., Panama City, Fla.
A terpene-based solvent composition consisting essentially of a terpene mixture containing 20 to 35% by weight monoterpene and 65 to 80% diterpene.
ATTENTION ANODIZERS... • Eliminate Seal Smut, Powder and Water Spots • Achieve Excellent Sealing • Eliminate or Lower Nickel Metal in Effluent • Lower Operating Costs... With New Technology Sealing Solutions Developed by BF Services
BEC 223 Stainless Steel Passivating solution is a citric acid based, environmentally friendly solution that meets the requirements of QQ-P-35C. Brooktronics Engineering Corporation 28231 A v e n u e Crocker, Bldgs. 50 & 70 V a l e n c i a , CA 91355 (800) 394-0922 Fax: (661) 294-9032 ww-w.brooktr o n i c s . c o m
For samples, pricing and technical information, call or fax Floyd Glidewell at:
BF Services 5265 Gravelbrook Drive, Richmond, VA 23234 Phone (804) 271-0050 • Fax (804) 271-0725
Circle 180 on reader information card
June 1999
Circle 020 on reader information card 173
A method of electroplating an impact-resistant plastic article comprising providing a substrate of a polycarbonate, which has been modified with between 15 and 50% by weight of acrylonitrileb u t a d i e n e - s t y r e n e ; conditioning with a halogenated organic solvent at a temperature no higher t h a n 120°F, said organic solvent conditioner consisting of between 5 and 25% by volume of a halogenated hydrocarbon in an aqueous medium chosen from the group consisting of alcohols, ketones, and ethers; rinsing; etching with an acidic solution at at 140 to
180°F for up to 10 min sufficient to roughen the conditioned surface, wherein the acidic solution is an aqueous sulfuric acid having a normality of 10.5 to 11.0 and then adding to each gallon of solution 3.5 to 4.0 pounds of chromic acid; rinsing; neutralizing in a bath maintained at about 100 to 120°F for 0.5 to 2.0 min; rinsing; catalyzing in a solution comprising between 20 to 50 ppm palladium at 80 to 90°F for 2 to 4 min; accelerating in a solution comprising sulfuric acid and complexers to neutralize the effect of contaminates at 110 to 140°F for one-half to 3 min; electrolessly depositing a layer of a metal strike; and elec-
Brooktronics manufacturers over 60 plating solutions and strives to manufacture new products to meet the demands of an industry that is always changing. Here are two of our latest solutions to meet industry demands. BEC 455 Zinc-Tin for the repair of IVD Aluminum, exceeding the requirements of MIL-C-83488C. BEC 455 also exceeds the requirements of QQ-P-416 Type I & II for Cadmium repair. Since BEC 455 is a Low Hydrogen Embrittlement solution it does not require a post plate bake.
trochemically plating a metal onto the metal strike. POLYURETHANE POWDER COATING
U.S. Patent 5,847,044. Dec. 8, 1998 H-J. Laas et al., assignors to Bayer AG, Leverskusen, Germany
A polyurethane powder coating composition with a low stoving temperature. TERPENE-BASED SOLVENTS
U.S. Patent 5,847,247. Dec. 8, 1998 A.J. Conte et al., assignors to Arizona Chemical Co., Panama City, Fla.
A terpene-based solvent composition consisting essentially of a terpene mixture containing 20 to 35% by weight monoterpene and 65 to 80% diterpene.
ATTENTION ANODIZERS... • Eliminate Seal Smut, Powder and Water Spots • Achieve Excellent Sealing • Eliminate or Lower Nickel Metal in Effluent • Lower Operating Costs... With New Technology Sealing Solutions Developed by BF Services
BEC 223 Stainless Steel Passivating solution is a citric acid based, environmentally friendly solution that meets the requirements of QQ-P-35C. Brooktronics Engineering Corporation 28231 A v e n u e Crocker, Bldgs. 50 & 70 V a l e n c i a , CA 91355 (800) 394-0922 Fax: (661) 294-9032 ww-w.brooktr o n i c s . c o m
For samples, pricing and technical information, call or fax Floyd Glidewell at:
BF Services 5265 Gravelbrook Drive, Richmond, VA 23234 Phone (804) 271-0050 • Fax (804) 271-0725
Circle 180 on reader information card
June 1999
Circle 020 on reader information card 173