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:
Dec. 17, 2013
Filed:
Nov. 18, 2010
Yoshitaka Naito, Ube, JP;
Shigeki Hamamoto, Ube, JP;
Hirotoshi Saito, Ube, JP;
Hiroshi Tanigawa, Ube, JP;
Joichi Watanabe, Ube, JP;
Koichi Tezuka, Ube, JP;
Masahito Nakamoto, Ube, JP;
Yoshitaka Naito, Ube, JP;
Shigeki Hamamoto, Ube, JP;
Hirotoshi Saito, Ube, JP;
Hiroshi Tanigawa, Ube, JP;
Joichi Watanabe, Ube, JP;
Koichi Tezuka, Ube, JP;
Masahito Nakamoto, Ube, JP;
UMG ABS, Ltd., Tokyo, JP;
Abstract
Provided is a flame-retardant thermoplastic resin composition in which any halogenated flame retardant is not used but a phosphoric flame retardant is used, which has flame retardancy meeting U.S. UL Standard 94 V-2, which exhibits excellent dripping performance during burning, and which is excellent in balance between properties. The flame-retardant thermoplastic resin composition contains 100 parts by mass of a copolymer mixture containing a graft copolymer (A) obtained by graft-polymerizing a rubbery polymer, a vinyl cyanide compound, and a copolymerizable vinyl compound and a vinyl copolymer (B) which is obtained by copolymerizing the vinyl cyanide compound and the copolymerizable vinyl compound and which has a mass-average molecular weight of 90,000 to 160,000 and 5 to 20 parts by mass of a phosphoric flame retardant (C) blended with the copolymer mixture. The content CBof vinyl cyanide units in the acetone-insoluble fraction of the copolymer mixture is 22.0% to 32.0% by mass, the content CBof vinyl cyanide units in the acetone-soluble fraction thereof is 22.0% to 34.0% by mass, and |CB−CB| is 0% to 3.0% by mass.