The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 1991
Filed:
Apr. 24, 1989
Richard L Wiedeman, Marlboro, MA (US);
Kenneth W Mamayek, Avon, MA (US);
Henry B Gordon, Shrewsbury, MA (US);
Mohan L Sanduja, Flushing, NY (US);
Kenneth K Sugathan, Piscataway, NJ (US);
Felicia Dragnea, Forest Hills, NY (US);
Carl Horowitz, Brooklyn, NY (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
A method of grafting a conductive, tenacious, and protective coating on a metallic substrate. The metallic substrate, such as steel, aluminum, iron, platinum, silver, nickel, gold, cobalt, copper, copper alloys, or combinations thereof, is contacted with a composition having: (i) one or more polymerizable monomers having at least two functionalities; (ii) one or more graft initiators containing nickel ion in an amount effective to initiate the graft polymerization of the monomers; and (iii) a reducing agent capable of reducing nickel ion to nickel metal. The composition and substrate are heated for a time and at a temperature effective to graft polymerize the monomers and nickel metal onto the substrate and form a conductive, tenacious, and protective coating bonded to the substrate. The coating can also contain elemental phosphorous. Preferably, the coated substrate has a surface resistivity of less than 0.1 ohm per square. The method, coated substrate, and composition are useful for improving the electro-magnetic compatibility (EMC) and electro-static discharge (ESD) protection of electrical enclosures.