Cycloolefin resin composition
First Claim
1. 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;
R1 to R18 and Ra and Rb are each independently selected from the group consisting of hydrogen atom, halogen atom and hydrocarbon group;
with the proviso that R15 to R18 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 R15 and R16 together can form an alkylidene group or R17 and R18 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 R1 -R18, Ra, Rb, 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°
C. of more than 2000 kg/cm2, 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).
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Abstract
The cycloolefin resin compositions of the present invention comprise:
[A] cycloolefin resin selected from (a-1) a cycloolefin random copolymer having recurring units derived from a cycloolefin of a specific structure, (a-2) a ring opening (co)polymer of the cycloolefin, (a-3) a hydrogenation product of the ring opening (co)polymer and (a-4) a graft-modified product of the random copolymer (a-1), the ring opening (co)polymer (a-2) and the hydrogenation product thereof (a-3);
[B] at least one of (b-1) an unmodified elastomer, (b-2) a modified elastomer, (b-3) an unmodified crystalline polyolefin and (b-4) a modified crystalline polyolefin; and
[C] a polyamide resin. Molded products formed from these cycloolefin resin compositions are excellent particularly in resistance to greases.
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Citations
3 Claims
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1. A cycloolefin resin composition comprising:
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(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; R1 to R18 and Ra and Rb are each independently selected from the group consisting of hydrogen atom, halogen atom and hydrocarbon group; with the proviso that R15 to R18 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 R15 and R16 together can form an alkylidene group or R17 and R18 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 R1 -R18, Ra, Rb, 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°
C. of more than 2000 kg/cm2, 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). - View Dependent Claims (2, 3)
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Specification