Cycloolefin polymer composition

A cycloolefin copolymer composition comprising:

• (Aa) a cycloolefin elastomer component which is obtained by copolymerizing (i) an .alpha.-olefin of two or more carbon atoms with (ii) a cycloolefin represented by the following formula (II) and (iiia) a non-conjugated diene of 5 to 20 carbon atoms, and which has a content of the cycloolefin units of not less than 3% by mol, an intrinsic viscosity (.eta.), as measured in decalin at 135.degree. C., of 0.5 to 5.0 dl/g, a glass transition temperature (Tg) of lower than 15.degree. C., an iodine value of 2 to 30 (g-iodine/100 g-polymer) and a refractive index n.sub.D (Aa), as measured at 25.degree. C., of 1.500 to 1.650, and contains a polymerizable carbon-carbon double bond;
• and
• (Ba) a cycloolefin copolymer component having a glass transition temperature (Tg), as measured by DSC, of not lower than 70.degree. C. which is obtained by copolymerizing (i) an .alpha.-olefin of two or more carbon atoms with (ii) a cycloolefin represented by the following formula (I),
• wherein the copolymerization to obtain the cycloolefin copolymer component (Ba) is carried out in the presence of the copolymer component (Aa) and the copolymer component (Aa) is chemically bound to the copolymer component (Ba);
• and
• wherein the component (Aa) is contained in an amount of 8 to 40% by weight, and a difference .DELTA.n.sub.D =.vertline.n.sub.D (Aa)-n.sub.D (Ba).vertline. between the refractive index n.sub.D (Aa) of the component (Aa) and the refractive index n.sub.D (Ba) of the component (Ba) is not more than 0.015. ##STR141## wherein n is 0 or 1;
• m is 0 or a positive integer;
• q is 0 or 1;
• each of R.sup.1 -R.sup.18, R.sup.a and R.sup.b is independently a hydrogen atom, a halogen atom, or an aliphatic, an alicyclic or an aromatic hydrocarbon group;
• R.sup.15 -R.sup.18 may be linked with one another to form a monocyclic or polycyclic group which may have a double bond;
• and
• R.sup.15 and R.sup.16, or R.sup.17 and R.sup.18 may together form an alkylidene group;
• or ##STR142## wherein each of p and q is independently 0 or an integer of 1 or more;
• each of m and n is independently 0, 1 or 2;
• each of R.sup.1 -R.sup.19 is independently a hydrogen atom, a halogen atom, or an aliphatic, an alicyclic or an aromatic hydrocarbon group, or an alkoxy group;
• the carbon atom to which R.sup.9 and R.sup.10 are linked may be bonded directly or by way of an alkylene group of 1-3 carbon atoms to the carbon atom to which R.sup.13 is linked or the carbon atom to which R.sup.11 is linked;
• and
• R.sup.15 and R.sup.12 or R.sup.15 and R.sup.19 may be linked together to form a monocyclic or polycyclic aromatic ring when each of n and m is 0.

A cycloolefin copolymer composition comprising:

• (A.alpha.) a cycloolefin elastomer component which is obtained by copolymerizing (i) an .alpha.-olefin of two or more carbon atoms and (ii) at least one cycloolefin represented by the following formula (I) or (II), and which has a content of the cycloolefin units of not less than 3% by mol, an intrinsic viscosity (.eta.), as measured in decalin at 135.degree. C., of 0.5 to 5.0 dl/g, a glass transition temperature (Tg) of lower than 15.degree. C. and a refractive index n.sub.D (A.alpha.), as measured at 25.degree. C., of 1.500 to 1.650, and substantially contains no polymerizable carbon-carbon double bond;
• and
• (B.alpha.) a cycloolefin copolymer component having a glass transition temperature (TG), as measured by DSC, of not lower than 70.degree. C. which is obtained by copolymerizing (i) an .alpha.-olefin of two or more carbon atoms with (ii) at least one cycloolefin represented by the following formula (I) or (II),
• wherein the copolymerization to obtain the cycloolefin copolymer component (B.alpha.) is carried out in the presence of the copolymer component (A.alpha.) and the copolymer component (A.alpha.) is finely dispersed in the copolymer component (B.alpha.);
• and
• wherein the component (A.alpha.) is contained in an amount of 8 to 40% by weight, and a difference .DELTA.n.sub.D =.vertline.n.sub.D (A.alpha.)-n.sub.D (B.alpha.).vertline. between the refractive index n.sub.D (A.alpha.) of the component (A.alpha.) and the refractive index n.sub.D (B.alpha.) of the component (B.alpha.) is not more than 0.015:
• ##STR143## wherein n is 0 or 1;
• m is 0 or a positive integer;
• q is 0 or 1;
• each of R.sup.1 -R.sup.18, R.sup.a and R.sup.b is independently a hydrogen atom, a halogen atom, or an aliphatic, an alicyclic or an aromatic hydrocarbon group;
• R.sup.15 -R.sup.18 may be linked with one another to form a monocyclic or polycyclic group which may have a double bond;
• and
• R.sup.15 and R.sup.16, or R.sup.17 and R.sup.18 may together form an alkylidene group;
• or ##STR144## wherein each of p and q is independently 0 or an integer of 1 or more;
• each of m and n is independently 0, 1 or 2;
• each of R.sup.1 -R.sup.19 is independently a hydrogen atom, a halogen atom, or an aliphatic, an alicyclic or an aromatic hydrocarbon group, or an alkoxy group;
• the carbon atom to which R.sup.9 and R.sup.10 are linked may be bonded directly or by way of an alkylene group of 1-3 carbon atoms to the carbon atom to which R.sup.13 is linked or the carbon atom to which R.sup.11 is linked;
• and
• R.sup.15 and R.sup.12 or R.sup.15 and R.sup.19 may be linked together to form a monocyclic or polycyclic aromatic ring when each of n and m is 0.

A cycloolefin copolymer composition comprising:

• (A.alpha.) a cycloolefin elastomer component which is obtained by copolymerizing (i) an .alpha.-olefin of two or more carbon atoms with (ii) at least one cycloolefin represented by the below formula (II), and which has a content of the cycloolefin units of not less than 3% by mol, an intrinsic viscosity (.eta.), as measured in decalin at 135.degree. C., of 0.5 to 5.0 dl/g, a glass transition temperature (Tg) of lower than 15.degree. C. and a refractive index n.sub.D (A.alpha.), as measured at 25.degree. C., of 1.500 to 1.650, and substantially contains no polymerizable carbon-carbon double bond;
• and
• (B.alpha.) a cycloolefin copolymer component having a glass transition temperature (Tg), as measured by DSC, of not lower than 70.degree. C. which is obtained by copolymerizing (i) an .alpha.-olefin of two or more carbon atoms with (ii) at least one cycloolefin represented by the following formula (I),
• wherein the copolymerization to obtain the cycloolefin copolymer component (B.alpha.) is carried out in the presence of the copolymer component (A.alpha.) and the copolymer component (A.alpha.) is finely dispersed in the copolymer component (B.alpha.);
• and
• wherein the component (A.alpha.) is contained in an amount of 8 to 40% by weight, and a difference .DELTA.n.sub.D =.vertline.n.sub.D (A.alpha.)-n.sub.D (B.alpha.).vertline. between the refractive index n.sub.D (A.alpha.) of the component (A.alpha.) and the refractive index n.sub.D (B.alpha.) of the component (B.alpha.) is not more than 0.015. ##STR145## wherein n is 0 or 1;
• m is 0 or a positive integer;
• q is 0 or 1;
• each of R.sup.1 -R.sup.18, R.sup.a and R.sup.b is independently a hydrogen atom, a halogen atom, or an aliphatic, an alicyclic or an aromatic hydrocarbon group;
• R.sup.15 -R.sup.18 may be linked with one another to form a monocyclic or polycyclic group which may have a double bond;
• and
• R.sup.15 and R.sup.16, or R.sup.17 and R.sup.18 may together form an alkylidene group;
• or ##STR146## wherein each of p and q is independently 0 or an integer of 1 or more;
• each of m and n is independently 0, 1 or 2;
• each of R.sup.1 -R.sup.19 is independently a hydrogen atom, a halogen atom, or an aliphatic, an alicyclic or an aromatic hydrocarbon group, or an alkoxy group;
• the carbon atom to which R.sup.9 and R.sup.10 are linked may be bonded directly or by way of an alkylene group of 1-3 carbon atoms to the carbon atom to which R.sup.13 is linked or the carbon atom to which R.sup.11 is linked;
• and
• R.sup.15 and R.sup.12 R.sup.15 and R.sup.19 may be linked together to form a monocyclic or polycyclic aromatic ring when each of n and m is 0.