Cycloolefin resin composition

• US 5,516,841 A
• Filed: 04/28/1995
• Issued: 05/14/1996
• Est. Priority Date: 09/12/1991
• Status: Expired due to Fees

• Current Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals)
• Original Assignee: Mitsui Petrochemical Industries, Ltd. (Mitsui Chemicals)
• Inventors: Kimura, Toshio, Nakagawa, Takasi, Toyota, Akinori, Yamamoto, Sanehiro
• Primary Examiner(s): Carrillo, Ana L.
• Application Number:
  US08/431,011
• Time in Patent Office: 382 Days
• Field of Search: 525/66, 525/179
• US Class Current: 525/66
• CPC Class Codes: C08L 21/00 Compositions of unspecified rubbers
• CPC Class Codes: C08L 23/08 Copolymers of ethene C08L23/16 takes precedence
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 2666/10 Homopolymers or copolymers according to C08L39/00 - C08L49/00; Derivatives thereof
• CPC Class Codes: C08L 2666/20 Macromolecular compounds having nitrogen in the main chain according to C08L75/00 - C08L79/00; Derivatives thereof
• CPC Class Codes: C08L 2666/22 Macromolecular compounds not provided for in C08L2666/16 - C08L2666/20
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 45/00 Compositions of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Compositions of derivatives of such polymers of cyclic anhydrides or imides C08L35/00; of cyclic esters of polyfunctional acids C08L31/00
• CPC Class Codes: C08L 51/00 Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds for ABS polymers C08L55/02; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 51/04 grafted on to rubbers
• CPC Class Codes: C08L 51/06 grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• CPC Class Codes: C08L 65/00 Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain C08L7/00 - C08L57/00, C08L61/00 take precedence; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 77/00 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: G11B 7/2538 polycycloolefins [PCO]

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.

Claims

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 R^a and R^b 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, R^a, R^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°

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).

2. The cycloolefin resin composition as claimed in claim 1, wherein the cycloolefin resin (A) has a softening temperature of not lower than 70°

C. and an intrinsic viscosity (η

) as measured in decalin at 135°

C. of 0.05 to 10 dl/g.

3. The cycloolefin resin composition as claimed in claim 1, wherein the polyolefin resin (b-3) is at least one polyolefin selected from the group consisting of high-density polyethylene, low-density polyethylene, linear low-density polyethylene and polypropylene, and the graft-modified product (b-4) of a polyolefin resin is a maleic acid-modified product of said polyolefin.