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:
May. 15, 1984
Filed:
May. 28, 1982
Applicant:
Inventors:
James P Bell, Storrs, CT (US);
Anthony J De Nicola, Jr, Newark, DE (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428413 ; 428418 ; 428457 ; 427302 ; 427327 ; 427386 ; 148-624 ; 148 / ; 156316 ; 156330 ; 526 62 ;
Abstract
The present invention is directed to a method for improving the adhesion of epoxy resins to steel substrates which comprises first removing the oxide surface layer, preferably by chemical means, and then pretreating the substrate with a solution of at least one coupling agent selected from the group consisting of .beta.-diketones and mercaptoesters. The invention also provides a method for improving the adhesion of epoxy resins to steel substrates by pretreating with citric acid or a salt thereof.