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. 01, 2005
Filed:
Dec. 24, 2003
Hideo Matsuoka, Ichinomiya, JP;
Masaru Tateyama, Nagoya, JP;
Yoshihiro Yamami, Nagoya, JP;
Kei Saito, Nagoya, JP;
Atsushi Ishio, Nagoya, JP;
Hideo Matsuoka, Ichinomiya, JP;
Masaru Tateyama, Nagoya, JP;
Yoshihiro Yamami, Nagoya, JP;
Kei Saito, Nagoya, JP;
Atsushi Ishio, Nagoya, JP;
Toray Industries, Inc., , JP;
Abstract
The present invention is a polyphenylene sulfide resin composition comprising (a) a polyphenylene sulfide resin and (b) an olefin-based resin, and satisfying the following conditions (i) through (v): (i) The mixing ratio of the polyphenylene sulfide resin (a) and the olefin-based resin (b) is such that the amount of the polyphenylene sulfide resin (a) is in a range from 95 to 60 wt %, while the amount of the olefin-based resin (b) is in a range from 5 to 40 wt %, with the total weight of both the ingredients as 100 wt %; (hi) said olefin-based resin (b) comprising two copolymer: (b-1) an epoxy group-containing olefin copolymer and (b-2) an ethylene/(α-olefin copolymer obtained by copolymerizing ethylene and an α-olefin having 3 to 20 carbon atoms; (iii) as the morphology observed by an electron microscope, said polyphenylene sulfide resin (a) forms a continuous phase, and said olefin-based resin (b) forms a dispersion phase and has a core-shell structure having said ethylene/α-olefin copolymer (b-2) acting as a core component contained in said epoxy group-containing olefin copolymer (b-1) acting as a shell component: (iv) the melt flow rate measured at a temperature of 315.5° C. and at a load of 5000 g according to ASTM-D-1238 is in a range from 10 to 50 g/10 min; and (v) the notched impact strength measured at −40° C. according to ASTM-D-256 is 300 J/m or more. This invention provides a PPS resin composition excellent in flowability, impact properties and low-temperature roughness and suitable for injection molding.