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:
Jun. 05, 1990
Filed:
Dec. 08, 1988
Applicant:
Inventors:
Hisao Takagishi, Kyoto, JP;
Shuichi Kanagawa, Osaka, JP;
Kunimasa Kamio, Suita, JP;
Kazuo Sumiyoshi, Oita, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
525504 ; 525507 ; 428413 ; 1741 / ; 1741 / ; 1741 / ; 528 87 ;
Abstract
An epoxy resin composition comprising a novolak type epoxy resin which is produced from a substituted-phenol novolak and epihalohydrin, and is 0.15 or less in a maximum absorbance of a 3% (W/V) dichloromethane solution of the epoxy resin, the absorbance being measured at a wave number of between 3570 and 3600 cm.sup.-1 with an infrared spectrophotometer having a cell of 2 mm length, which is useful particularly in encapsulating and laminating applications in electronic fields.