Back to results
US 5,206,302 AGranted
Styrene-based resin composition
AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsTuneaki Kohsaka, Kazuo Sato, Yutaka Tsubokura, Takashi Kanezaki
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsTuneaki Kohsaka, Kazuo Sato, Yutaka Tsubokura, Takashi Kanezaki
Estimating the term…
The rubber-modified styrene-based resin composition, which is a composite of a styrene-based resin as a continuum of the matrix phase and a diene-based rubbery polymer as a dispersed particulate phase in the matrix, is characterized by the parameters including an average particle diameter of the particles of the rubbery polymer in the range from 0.08 to 1.00 .mu.m, peripheral parameter thereof in the range from 0.1 to 2.5 (.mu.m).sup.-1. (% by weight).sup.-1 and relaxation time T.sub.2 thereof in the range from 300 to 2000 .mu. seconds as the determinant factors of the moldability of the resin composition as well as the impact strength and surface gloss of the shaped articles prepared from the composition.
A rubber-modified styrene-based resin composition comprising a styrene-based resin as a continuum of the matrix phase, wherein said styrene-based resin composition is selected from the group consisting of vinyl aromatic homopolymers and copolymers of vinyl aromatic monomers with copolymerizable monomers, and a diene rubber polymer as a dispersed particulate phase in the matrix, in which the particles of the rubbery polymer have an average particle diameter in the range from 0.08 to 1 .mu.m, peripheral parameter in the range from 0.1 to 2.5 (.mu.m).sup.-1. (% by weight).sup.-1 and relaxation time T.sub.2 in the range from 300 to 2000 .mu. seconds.
Dependencies are inferred from the claim text.