| 摘要 |
<p>The first and second cycloolefin random copolymer compositions of the present invention contain at least two kinds of cycloolefin random copolymers, particularly the first cycloolefin random copolymer compositions of the invention are characterized by having an intrinsic viscosity of 0.2 to 0.7 and a molecular weight distribution (Mw/Mn) of at least 3, and the second cycloolefin random copolymer compositions of the invention are characterized by having the Cw/Cn ratio of a weight average cycloolefin content (Cw) to a number average cycloolefin content (Cn) of at least 1.04. The third cycloolefin random copolymer compositions of the invention which contain at least three kinds of cycloolefin random copolymers are characterized in that said composition has a softening temperature (TMA) of at least 70<o>C, and when cycloolefin random copolymer components constituting the composition are taken as S1, S2 ... Si ... Sn (n is an integer of at least 3), a softening temperature (TMA) of each component (Si) is taken as Ti (<o>C), and a weight percentage of each component (Si) present in the composition is taken as Wi (i is an integer of 1 to n), Ti and Wi satisfy the following formulas (3), (4) and (5), Ti < Ti+1 (3> wherein i is an integer of 1 to n-1, T1 < 70 (<o>C) (4), and <MATH> a two-component composition containing the component Si and Si+1 in a ratio of Wi : Wi+1 has a haze of not more than 7.0%, and the sum total of the components having a softening temperature (TMA) of less than 70<o>C is more than 10% of the composition.</p> |
