Rubber-modified styrene polymer

Details Rubber-modified styrene polymer Rubber-modified styrene polymer

1999-02-17

2000-12-19

Nutter, Nathan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525222, 525227, 525241, C08F 800, C08L 3304, C08L 3502

Patent

active

061628700

ABSTRACT:
A rubber-modified styrene type polymer excellent in transparency and excellent in impact strength and moldability, is presented.
A rubber-modified styrene type polymer comprising from 1 to 15 parts by weight of a dispersed phase made of a rubber-like elastic material and from 99 to 85 parts by weight of a continuous phase made of a polymer comprising from 35 to 75 wt % of styrene type monomer units and from 65 to 25 wt % of (meth)acrylate type monomer units, wherein the rubber-like elastic material is a styrene (30 to 50 wt %)-butadiene (70 to 50 wt %) block copolymer, the weight average molecular weight (Mw) of the polystyrene portions of this block copolymer is from 45,000 to 75,000, and the ratio (Mw/Mn) of Mw to the number-average molecular weight (Mn) is from 1.20 to 1.80.

REFERENCES:
patent: 5115028 (1992-05-01), Gebizlioglu et al.

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