Patent ID: 8883925

Claim:
A cyclic olefin polymer composition comprising: [A] a cyclic olefin polymer which (1) is selected from the group consisting of the following [A-1], [A-2], [A-3] and [A-4], and (2) has a softening temperature (TMA) of 120 to 300° C., and [B] a cyclic olefin polymer which (1) is selected from the group consisting of the following [B-1], [B-2], and (2) has a glass transition temperature (Tg) of 6.7 to 12.2° C., wherein an absolute value of the difference between the refractive indices represented by the following equation is 0.003 or less; |n D [B]−n D [A]| wherein n D [B] represents the refractive index of the cyclic olefin polymer [B], and n D [A] represents the refractive index of the cyclic olefin polymer [A], which are measured in accordance with ASTM D542, and wherein the component [A] is contained in the amount of 50 to 95 parts by weight and the component [B] is contained in the amount of 5 to 50 parts by weight, provided that the total amount of the components [A] and [B] is defined as 100 parts by weight, [A-1] a random copolymer comprising a structural unit derived from an α-olefin having two or more carbon atoms and a structural unit derived from a cyclic olefin represented by the following formula [I]; wherein in the formula [I], n is 0 or 1, m is 0 or a positive integer, q is 0 or 1, R 1 to R 18 and R a and R b are each independently a hydrogen atom, a halogen atom, or a hydrocarbon group which may be substituted with a halogen atom, R 15 to R 18 may be bonded to each other to form a monocyclic or polycyclic group, and the monocyclic or polycyclic group may have a double bond, and further, R 15 and R 16 , or R 17 and R 18 may together form an alkylidene group, [A-2] a ring-opening polymer or copolymer of the cyclic olefin represented by the formula [I], [A-3] a hydrogenated product of the ring-opening polymer or copolymer [A-2], [A-4] a graft modified product of the [A-1], [A-2] or [A-3] [B-1] a random copolymer comprising a structural unit derived from one or more kind(s) of α-olefin having two or more carbon atoms and a structural unit derived from one or more kind(s) of a cyclic olefin represented by the following formula [III]; wherein the unit derived from one or more kind(s) of the cyclic olefin represented by the formula [III] is in an amount of 13.9 to 14.6% by mole, and R 1 to R 8 are each independently a hydrogen atom or a hydrocarbon group, and R 5 and R 6 , R 6 and R 7 , and R 7 and R 8 may be bonded to each other to form a monocyclic group which may contain a double bond, and [B-2] a graft modified product of the [B-1], wherein said cyclic olefin polymer [B] has a crystallinity, as measured using DSC, of 5% or less, wherein when the composition is formed into a sheet having a thickness of 0.1 mm, the sheet exhibits a haze, as measured in accordance with JIS K7136, of 1% or less.