Styrene-based copolymer and process for production

专利名称：Styrene-based copolymer and process for

production thereof

发明人：Eiichi Terada申请号：US07/3451申请日：190612公开号：US05159025A公开日：19921027

摘要：A styrene-based copolymer comprising 74.3 to 98.7 mol % of the structural unit(I) represented by the general formula: ##STR1## 1.3 to 25.4 mol % of the structural unit(II) represented by the formula: ##STR2## and 10 to 7000 mol ppm of the structural unit(III) represented by the general formula: ##STR3## (wherein R.sup.1 to R.sup.3 are asdefined in the appended claims), characterized by having toluene- insoluble content ofnot more than 0.5% by weight, is disclosed.

Efficient processes for producing the above styrene-based copolymer are alsodisclosed.

申请人：IDEMITSU PETROCHEMICAL CO., LTD.

代理机构：Antonelli, Terry, Stout & Kraus

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