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. 05, 1995
Filed:
Mar. 19, 1993
Toshihiko Ando, Takaishi, JP;
Mune Iwamoto, Takaishi, JP;
Masahiro Kaneko, Takaishi, JP;
Kouzou Ichikawa, Hadano, JP;
Akihiko Nakajima, Takaishi, JP;
Masato Takaku, Takaishi, JP;
Mitsui Toatsu Chemicals, Incorporated, Tokyo, JP;
Abstract
A rubber modified styrenic resin composition which can be obtained by dispersing rubber-like polymer particles in a homopolymer or a copolymer of a styrenic monomer. The rubber modified styrenic resin composition has: (a) a volume-average particle size of the rubber-like polymer particles is in the range of from 0.2 to 0.8 .mu.m, (b) a particle size distribution curve on the basis of the volume of the rubber-like polymer particles has one peak, (c) a ratio of a 5% value to a 95% value of the cumulative distribution of the particle size on the basis of the volume of the rubber-like polymer particles is in the range of from 3 to 45. The rubber-like polymer particles comprise (i) a styrene-butadiene block copolymer (I), and (ii)(1) a styrene-butadiene block copolymer (II), (2) a polybutadiene (III), or (3) a styrene-butadiene block copolymer (IV) and polybutadiene (V), wherein (I) contains 25-50 % styrene, (II) and (IV) contain 5-20% styrene, the weight ratio of: (I)/(II), (I)/(III) and (I)/(IV) is from 95/5 to 40/60 and {(I)+(IV)}/(V) is from 99/1 to 70/30 and (I) to (V) are of specified styrene solution viscosity.