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. 27, 2009
Filed:
Jun. 09, 2005
Yasumasa Akatsuka, Sanyoonoda, JP;
Shigeru Moteki, Annaka, JP;
Makoto Uchida, Saitama, JP;
Kazunori Ishikawa, Misato, JP;
Yasumasa Akatsuka, Sanyoonoda, JP;
Shigeru Moteki, Annaka, JP;
Makoto Uchida, Saitama, JP;
Kazunori Ishikawa, Misato, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention relates to an epoxy resin composition containing (a) an epoxy resin and (b) a phenolic hydroxy group-containing polyamide resin having the structure represented by Formula (1), a method of curing the composition, a varnish, prepreg, or sheet using the composition, and an epoxy resin composition having the polyamide resin represented by Formula (1) as the active component. Cured products of the epoxy resin composition according to the present invention have a sufficient high flexibility when formed into a thin film, have a flame resistance even though the cured compositions do not contain a halogen flame retardant, an antimony compound, or the like and are superior in heat resistance and adhesiveness, and thus are extremely useful in a wide range of applications, for example, as molded materials, cast materials, laminate materials, paints, adhesives, resists, and the like. (wherein, l and m are averages, satisfying the formula: m/(l+m)=0.01; and l+m is a positive number of 2 to 200. Arrepresents a bivalent aromatic group; Arrepresents a phenolic hydroxyl group-containing bivalent aromatic group; and Arrepresents:-ph(R)n- or-ph(R)n-X-ph(R)n-,wherein, -ph(R)n-, -ph(R)n- and -ph(R)n- represent respectively R-substituted, R-substituted and R-substituted phenylene groups, or an unsubstituted phenylene group; n is an integer of 0 to 3; R, Rand Reach independently represent a C1 to C3 alkyl group or a C1 to C3 alkoxy group; and X represents O, S, CO, SOor a single bond).