Cycloolefin resin composition

A cycloolefin resin composition comprising:

• (A) at least one cycloolefin resin, having a crystallinity of 0 to 20%, which is selected from the group consisting of:
• (a-1) a random copolymer of ethylene and a cycloolefin comprising polymerized ethylene units and polymerized cycloolefin units, wherein said polymerized cycloolefin units are represented by the following formula (II) ##STR22## wherein n is 0 or 1;
• m is 0, 1 or 2;
• q is 0or 1;
• R.sup.1 to R.sup.18 and R.sup.a and R.sup.b are each independently selected from the group consisting of hydrogen atom, halogen atom and hydrocarbon group;
• with the proviso that R.sup.15 to R.sup.18 can link to each other to form a monocyclic or polycyclic group, and the monocyclic group or polycyclic group can have a double bond;
• and
• with the further proviso that R.sup.15 and R.sup.16 together can form an alkylidene group or R.sup.17 and R.sup.18 together can form an alkylidene group;
• (a-2) a ring opening polymer or a ring opening copolymer of a cycloolefin comprising ring opened cycloolefin units represented by the following formula (III) ##STR23## wherein R.sup.1 -R.sup.18, R.sup.a, R.sup.b, n, m and q have the same meanings as defined in formula (II);
• (a-3) a hydrogenation product of said ring opening polymer or said ring opening copolymer;
• (a-4) a graft-modified product obtained by modifying the random copolymer (a-1), the ring opening polymer or copolymer (a-2) or the hydrogenation product thereof (a-3) with an unsaturated carboxylic acid or its derivative;
• (B) at least one crystalline polyolefin selected from the group consisting of:
• (b-3) a polyolefin resin having a crystallinity of more than 30% and a tensile modulus at 23.degree. C. of more than 2000 kg/cm.sup.2, and
• (b-4) a graft-modified product obtained by modifying said polyolefin resin with an unsaturated carboxylic acid or its derivative,
• in an amount of 5 to 150 parts by weight based on 100 parts by weight of the cycloolefin resin (A);
• and
• (C) a polyamide resin in an amount of 5 to 300 parts by weight based on 100 parts by weight of the cycloolefin resin (A).