This invention is directed to a coating composition used for original equipment manufacturing or refinishing uses in the automotive industry, which coating composition utilizes an acrylic polymer which contains substituted or unsubstituted exomethylene lactones or lactams as a comonomer.
Blends Of Poly[Α-Methylenelact(One)(Am)] Homo-And Copolymers
Charles J. Brandenburg - Newark DE, US David M. Dean - West Chester PA, US George Henry Hofmann - Wilmington DE, US Rutger D. Puts - Wilmington DE, US Randal King - Midlothian VA, US Edmund Arthur Flexman - Wilmington DE, US
Assignee:
E.I. du Pont de Nemours and Company - Wilmington DE
International Classification:
C08L 77/00 C08F 224/00
US Classification:
525181, 525185, 525206
Abstract:
Polymers containing α-methylenelact(ones)(ams) such as α-methylenebutyrolactones are useful in blends with other polymers. For examples such polymers which have reactive groups are toughened by mixing with a rubbery material which has complimentary reactive groups, or polymers containing repeat units derived from α-methylenelact(ones)(ams) are toughened by mixing with polymeric core-shell particles having an elastomeric core and a specified thermoplastic shell. The properties of thermoplastics are also improved by blending with α-methylenelact(ones)(ams) such as α-methylenebutyrolactones containing (co)polymers.
John R. Dodd - Wilmington DE Anthony J. Arduengo - Wilmington DE Randal D. King - Wilmington DE Americus C. Vitale - West Chester PA
Assignee:
McGean-Rohco, Inc. - Cleveland OH
International Classification:
C23C 1831 B05D 512
US Classification:
106 122
Abstract:
An environmentally innocuous effective replacement for thiourea is disclosed for use as a complexing agent in displacement plating processes in which the plating solution is applied to the substrate surface to be plated by immersion or by spraying, cascading, pouring and the like. The replacement complexing agent is an imidazole-2-thione compound having the formula: ##STR1## wherein A and B are the same or different --R--Y groups, wherein R is linear, branched or cyclic alkenyl group containing 1 to 12 carbon atoms and Y is a hydrogen, halogen, cyano, vinyl, phenyl, or ether moiety. Of this class of compounds, 1-methyl-3-propyl-imidazole-2-thione is preferred for immersion tin plating. This class of complexing agents is particularly useful in spray displacement tin plating for the manufacture of printed circuit boards wherein free tin metal is added to the plating solution.
High-Throw Acid Copper Plating Using Inert Electrolyte
Randal D. King - Wilmington DE Eda R. Montgomery - Wilmington DE
Assignee:
McGean-Rohco, Inc. - Cleveland OH
International Classification:
C25D 338
US Classification:
205125
Abstract:
Improved through-hole plating of printed circuit boards, wherein the ratio of the printed circuit board thickness to the diameter of at least one through hole is greater than 3 to 1, is achieved by a high-throw acid copper plating bath of this invention. The high-throw acid copper plating bath comprises an aqeuous solution of (A) copper sulfate, (B) sulfuric acid, (C) chloride ion, e. g. , hydrochloric acid, (D) a carrier, (E) a brightener, and (F) an alkali metal salt; wherein the plating bath has a pH of not greater than about 1, the concentration of the hydrochloric acid is from about 6. times. 10. sup. -4 to about 1. 8. times. 10. sup. -3 moles/liter, and the mole ratio of copper sulfate:sulfuric acid is not greater than about 1:25. Unlike previous high-throw acid copper plating baths, the bath of this invention contains an alkali metal salt. The use of the alkali metal salt makes it possible to maintain a lower acid concentration resulting in easier maintenance and more consistent plating.
Eda R. Montgomery - Wilmington DE Randal D. King - Wilmington DE
Assignee:
McGean-Rohco, Inc. - Cleveland OH
International Classification:
C25D 338
US Classification:
205298
Abstract:
For acid copper plating baths containing a brightener used to produce smooth copper coatings of high brilliancy, it has been found that the "break-in" period normally needed after a brightener is added to the plating bath, has been virtually eliminated by use of the brightener of this invention. This brightener consists essentially of a peroxide oxidation product of a dialkylamino-thioxomethyl-thioalkanesulfonic acid wherein each alkyl and alkane group individually contains 1 to 6 carbon atoms and wherein the peroxide oxidation of the dialkylamino-thioxomethyl-thioalkane-sulfonic acid is carried out in an acid, aqueous medium having a pH of not more than about 1. In an added embodiment of this invention the acid copper plating bath also contains hydrolysis products of the peroxide oxidation product of a dialkylamino-thioxomethyl-thioalkanesulfonic acid.
Process For Extending The Life Of A Displacement Plating Bath
Americus C. Vitale - West Chester PA Carl W. Reinbold - Wilmington DE Randal D. King - Wilmington DE John R. Dodd - Wilmington DE
Assignee:
McGean-Rohco, Inc. - Cleveland OH
International Classification:
B05D 512 B05D 118
US Classification:
205 85
Abstract:
A stabilized spray displacement tin plating process of copper printed circuit innerlayers is disclosed for the manufacture of multilayer printed circuit boards. During prolonged use of spray tin plating, the plating solution becomes saturated with cupurous thiourea complex which precipitates interfering with spray nozzles and other mechanical components. The tin plating solution is stabilized by removing portions from the reservoir before saturation is reached, selectively precipitating the thiourea complex, and returning the remaining solution back to the reservoir. The precipitated cupurous thiourea complex is redissolved in acid and either disposed of by conventional waste treatment or the acid solution can be electrowinned to reclaim copper and oxidize thiourea to form a more acceptable acid solution for waste treatment. Preferably, the thiourea is isolated from the anode during electrowinning, so that the acid thiourea solution formed may be used to partially replenish the tin plating solution in the reservoir. By such periodic removal of the complex, the plating bath is stabilized and its useful life is extended dramatically.
Randal D. King - Wilmington DE Americus C. Vitale - West Chester PA
Assignee:
McGean-Rohco, Inc. - Cleveland OH
International Classification:
C23C 2600
US Classification:
427 98
Abstract:
An efficient spray displacement tin plating process of copper printed circuit innerlayers is disclosed for the manufacture of multilayer printed circuit boards. The displacement tin plating solution is stabilized and replenished by incorporating free tin metal in the plating solution reservoir. Unwanted tin(IV) ions which are produced by aerial oxidation during the spray process, are reacted with tin metal in the reservoir to produce sufficient tin(II) ions to compensate for losses due to plating, oxidation and the like. Not only is the plating bath stabilized, but its useful life is extended dramatically.
Process For The Preparation Of .Alpha.-Methylenelactones And .Alpha.-Substituted Hydrocarbylidene Lactones
Charles Brandenburg - Wilmington DE Randal King - Kennett Square PA Leo E. Manzer - Wilmington DE
Assignee:
E. I. du Pont de Nemours and Company - Wilmington DE
International Classification:
C07D30702 C07D31300
US Classification:
549295
Abstract:
This invention pertains to a process for making. alpha. -methylenelactones and. alpha. -substituted hydrocarbylidene lactones. The present invention obtains high yields of. alpha. -methylene-. gamma. -butyrolactone by heating. gamma. -butyrolactone and formaldehyde in the presence of a base.
The Chemours Company
Vice President, Technology
Dupont Jan 1, 1989 - Nov 13, 2016
Technology Manager, Product Manager
Dupont Sep 2010 - Nov 13, 2016
Global Technology Director
Education:
Michigan State University 1984 - 1989
Doctorates, Doctor of Philosophy, Philosophy, Chemistry
Skills:
Cross Functional Team Leadership Product Development Six Sigma Polymers R&D Process Engineering Market Development Coatings Manufacturing Continuous Improvement Management New Business Development Research and Development Chemistry Chemical Engineering Product Management Business Development Plastics
Interests:
Collecting Antiques Exercise Nascar Home Improvement Shooting Reading Gourmet Cooking Sports The Arts Home Decoration Diy Cooking Gardening Outdoors Electronics Crafts Fitness Music Movies Collecting Kids Diet Automobiles Travel Investing Traveling