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:
Apr. 10, 2001
Filed:
Nov. 10, 1997
Applicant:
Inventor:
Akitoshi Masuyama, Ichihara, JP;
Assignee:
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08K 5/15 ;
U.S. Cl.
CPC ...
C08K 5/15 ;
Abstract
A resin composition comprising polystyrene having the syndiotactic configuration (SPS) showing improved heat stability in heat molding at a high temperature is obtained by adding a combination of a phenolic antioxidant and an antioxidant containing phosphorus to SPS. The molded article is obtained by using the resin composition as the material. Additional use of an antioxidant containing sulfur gives more excellent improvement. The composition may further contain another thermoplastic resin and/or rubber elastomer, a polymer exhibiting compatibility with or affinity for SPS and having a polar group, and/or an inorganic filler in accordance with necessity.