Patent ID: 6410673
Filing Date: 2002-06-25
Classification: C08F,C08J,Y10S

Abstract:
An ethylene-aromatic vinyl compound copolymer characterized by satisfying the following conditions:(1) the aromatic vinyl compound content is from 0.5 mol % to 10 mol %; (2) as measured with respect to a molded product having a thickness of 0.2 mm, the haze is at most 14%, or the total light transmittance is at least 90%; (3) an ethylene-aromatic vinyl compound copolymer characterized in that the relation of the aromatic vinyl compound content and the glass transition point (Tg) obtained by an inflection point method as observed at a temperature of at least âˆ’50Â° C. by a differential scanning calorimeter (DSC), satisfies the following formula (1): âˆ’20+1.00St>Tg>âˆ’30+1.05Stâ€ƒâ€ƒFormula (1) â€ƒwherein St represents the aromatic vinyl compound content (molar fraction %) in the copolymer; and (4) the weight average molecular weight is from 140,000 to 500,000 when the aromatic vinyl compound content is from 5 mol % to 10 mol % and from 60,000 to 500,000 when the content is from 0.5 mol % to less than 5 mol %.