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:
Nov. 19, 1996
Filed:
Jul. 19, 1995
Ralph D Hermansen, Northridge, CA (US);
Steven E Lau, Los Angeles, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A flexible electrically-conductive epoxy-based adhesive composition and method for making the same are provided. The present adhesive composition comprises: (a) a polymer mixture comprising at least one polyepoxide resin having a hardness not exceeding a durometer Shore A reading of 45, when cured with a stoichiometric amount of diethylene triamine ('DETA'), and a substantially stoichiometric amount of at least one latent epoxy resin curing agent; and (b) an electrically-conductive filler comprising a metal. Optional components include secondary epoxy resins, non-reactive flexibilizers, diluents, and processing aids. The present adhesive composition is rheologically stable for weeks as a single component mixture at room temperature and is curable in less than two hours at a temperature ranging from about 100.degree. C. to 140.degree. C., whereupon the cured adhesive composition exhibits a durometer Shore A of less than 95 and a volume resistivity less than about 10.sup.-2 ohm-cm at room temperature.