Copolymer, polymer composition, and crosslinked polymer

Patent metadata

Field	Value
Publication number	US-10385149-B2
Application number	US-201615555228-A
Country	US
Kind code	B2
Filing date	Jan 29, 2016
Priority date	Mar 4, 2015
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

A copolymer having a structural unit derived from a conjugated diene compound and a structural unit derived from an α-olefin having 3 to 8 carbon atoms, wherein the copolymer has a melting point within a temperature range of 0 to 10° C. and has a fusion enthalpy of 5 J/g or more as measured on a differential scanning calorimeter under the following conditions. Conditions: (1) cooling from 200° C. to −150° C. at a rate of 10° C./min; (2) retaining at −150° C. for 1 minute; and (3) heating from −150° C. to 200° C. at a rate of 20° C./min.

First claim

The invention claimed is:

1. A copolymer, comprising a structural unit derived from a conjugated diene compound and a structural unit derived from an α-olefin having 3 to 8 carbon atoms,
wherein the copolymer is an alternating copolymer of the structural unit derived from the conjugated diene compound and the structural unit derived from the α-olefin copolymer, and
wherein the copolymer has a melting point within a temperature range of 0 to 10° C. and has a fusion enthalpy of 5 J/g or more as measured on a differential scanning calorimeter under the following conditions:
Conditions:
(1) cooling from 200° C. to −150° C. at a rate of 10° C./min;
(2) retaining at −150° C. for 1 minute; and
(3) heating from −150° C. to 200° C. at a rate of 20° C./min.

2. A polymer composition, comprising the copolymer according to claim 1 and a crosslinking agent.

3. A crosslinked polymer obtained by crosslinking the polymer composition according to claim 2 .

4. The copolymer according to claim 1 , wherein the copolymer has a melting point within a temperature range of 0 to 8° C.

5. The copolymer according to claim 1 , wherein the copolymer has a melting point within a temperature range of 1 to 7° C.

6. The copolymer according to claim 1 , wherein the copolymer has a fusion enthalpy of 10 J/g or more.

7. The copolymer according to claim 1 , wherein the copolymer has a fusion enthalpy of 15 J/g or more.

8. The copolymer according to claim 1 , wherein the copolymer optionally comprises a structural unit derived from a monomer other than the conjugated diene compound or the α-olefin having 3 to 8 carbon atoms, an amount of the monomer being 10 weight % or less with respect to a total amount of monomers used in a polymerization of the copolymer.

9. The copolymer according to claim 1 , wherein the copolymer optionally comprises a structural unit derived from a monomer other than the conjugated diene compound or the α-olefin having 3 to 8 carbon atoms, an amount of the monomer being 5 weight % or less with respect to a total amount of monomers used in a polymerization of the copolymer.

10. The copolymer according to claim 1 , wherein the copolymer optionally comprises a structural unit derived from a monomer other than the conjugated diene compound or the α-olefin having 3 to 8 carbon atoms, an amount of the monomer being 1 weight % or less with respect to a total amount of monomers used in a polymerization of the copolymer.

Assignees

• Jsr Corp

Inventors

• Sone Takuo
• Matsumoto Shouichi
• Watanabe Ayumi
• Hara Ayumi

Classifications

• C08K5/00

  Use of organic ingredients · CPC title

• C08F236/04 Primary

  conjugated · CPC title

• C08L23/02

  not modified by chemical after-treatment · CPC title

• C08F210/00

  Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond · CPC title

• C08K3/16

  Halogen-containing compounds · CPC title