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:
Oct. 17, 1989
Filed:
Aug. 15, 1988
Paul A Larson, Lake Jackson, TX (US);
Dale J Aldrich, Lake Jackson, TX (US);
Jody R Berman, West Columbia, TX (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
Electrical laminates are prepared from prepreg materials prepared by impregnating a substrate with a laminating varnish comprising a ketone solvent solution of a curable composition comprising (A) at least one aromatic based epoxy resin having an average number of epoxide groups per molecule of more than 2; (B) a mixture of (1) at least one phenolic hydroxyl-containing compound having an average of more than 1 but not more than 2 phenolic hydroxyl groups per molecule; and (2) at least one phenolic hydroxyl-containing compound having an average of more than 2 phenolic hydroxyl groups per molecule; and (C), optionally, at least one catalyst for effecting the reaction between (A) and (B).