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:
May. 14, 1996
Filed:
Nov. 04, 1994
Mitsuru Hoshino, Fukushima, JP;
Takeo Ogihara, Fukushima, JP;
Yasuhiro Kadota, Tochigi, JP;
Kazuaki Maruyama, Tochigi, JP;
Kureha Kagaku Kogyo Kabushiki Kaisha, Osaka, JP;
Tsutsunaka Plastic Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
A polycarbonate resin composition is given as a mixture of (A) 97-50 wt. % of a polycarbonate resin, and (B) 3-50 wt. % of a graft copolymer. The graft copolymer is obtained by graft-polymerizing 50-95 wt. parts of a monomer selected from (b1) a monomer mixture comprising 60-90 wt. % of an aromatic vinyl monomer, 40-10 wt. % of a vinyl cyanide monomer, and 0-30 wt. % of a monomer copolymerizable with the monomers and (b2) an alkyl methacrylate having an alkyl group including 1-4 carbon atoms in the presence of a latex containing 5-50 wt. parts of a rubber polymer with respect to the total of the monomer and the rubber polymer as 100 wt. parts. The graft copolymer includes a graft-polymerized component having a weight-average molecular weight 50.times.10.sup.4 -300.times.10.sup.4. The polycarbonate resin composition shows a good extrudability and provides a sheet product which exhibits good thermoforming characteristics, such as suppressed drawdown and good deep drawability.