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:
Nov. 22, 2016
Filed:
Mar. 21, 2013
Mitsubishi Engineering-plastics Corporation, Minato-ku, JP;
Keisuke Tomita, Kanagawa, JP;
Toshiki Monden, Kanagawa, JP;
Mitsubishi Engineering-Plastics Corporation, Minato-ku, JP;
Abstract
The present invention provides a polycarbonate resin composition for molding a molded article having a thin-walled section and exhibiting a high level of flame resistance and impact resistance, and an excellent surface appearance (low-gloss property). More specifically, the present invention is a polycarbonate resin composition for molding a polycarbonate resin molded article having a thin-walled section with a wall thickness of 0.6 mm or less, the polycarbonate resin composition being characterized in that the resin composition contains an oligomeric phosphoric acid ester flame retardant (B1) and/or a phosphazene flame retardant (B2), and the content of flame retardant with respect to 100 parts by mass of polycarbonate resin (A) is: i) 5 to 20 parts by mass when the resin composition contains only the oligomeric phosphoric acid ester flame retardant (B1); ii) 10 to 30 parts by mass when the resin composition contains only the phosphazene flame retardant (B2); or iii) a total of 5 to 30 parts by mass when the resin composition contains both the oligomeric phosphoric acid ester flame retardant (B1) and the phosphazene flame retardant (B2), with the content ratio thereof being 1 to 49 mass % of (B1) and 99 to 51 mass % of (B2), the resin composition additionally contains 3 to 15 parts by mass of a siloxane-based core/shell elastomer (C) and 0.8 to 10 parts by mass of carbon black (D) with respect to 100 parts by mass of polycarbonate resin (A), the siloxane-based core/shell elastomer (C) has a silicon content of 9.1 to 30 mass % and a number-average particle size in the range of 50 to 1,000 nm, and the flow rate per unit time of the resin composition is 15 to 50 ×10cm/sec.