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:
Aug. 03, 1999
Filed:
Nov. 26, 1997
Mikio Ito, Yokohama, JP;
Sumiya Miyake, Yokohama, JP;
Kazuhiko Shibata, Fujieda, JP;
Akihiko Tobisawa, Fujieda, JP;
Sumitomo Bakelite Company Limited, Tokyo, JP;
Abstract
A flame-retardant resin composition which comprises (A) 100 parts by weight of an unhalogenated epoxy resin having at least two epoxy groups in one molecule, (B) 20 to 205 parts by weight of a maleimide compound having at least one maleimido group in one molecule, (C) 20 to 65 parts by weight of a curing agent having an amino group and (D) a phosphorus compound in a proportion of 0.5 to 4.5 parts by weight in terms of phosphorus element per 100 parts by weight of a total of the components (A), (B) and (C), provided that the proportion of nitrogen element contained in the composition is 2.0 to 10.0 parts by weight per 100 parts by weight of the total composition. The above flame-retardant resin composition has a high flame retardance without adding a halogen compound and does not deteriorate the characteristics of commercial products.