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Ring-opening copolymers

A copolymer and single-ring technology, applied in the field of ring-opening copolymers, can solve the problem of no research on the abrasion resistance of rubber cross-linked products, and achieve the advantages of preventing agglomerates from sticking to each other, excellent in abrasion resistance, and excellent in thermal fluidity. Effect

Pending Publication Date: 2022-07-22
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in Patent Document 1 and Patent Document 2, the abrasion resistance of the obtained cross-linked rubber is not studied.

Method used

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  • Ring-opening copolymers
  • Ring-opening copolymers
  • Ring-opening copolymers

Examples

Experimental program
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Effect test

Embodiment

[0140] Hereinafter, the present invention will be further described based on detailed examples, but the present invention is not limited to these examples. In addition, the following "parts" are based on weight unless otherwise specified. The test methods carried out in the present examples and comparative examples are as follows.

[0141] [Weight average molecular weight of ring-opened copolymer]

[0142] The weight average molecular weight (Mw) of the ring-opened copolymer was determined based on the graph of the molecular weight in terms of polystyrene using gel permeation chromatography (GPC). In addition, the specific measurement conditions of gel permeation chromatography are as follows.

[0143] Measuring device: HLC-8320EcoSCE (manufactured by Tosoh Corporation)

[0144] Column: Two GMH-HR-H (manufactured by Tosoh Corporation) connected in series

[0145] Detector: Differential Refractometer RI-8020 (manufactured by Tosoh Corporation)

[0146] Eluent: Tetrahydrofu...

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Abstract

Provided is a ring-opening copolymer containing a structural unit derived from a norbornene compound represented by general formula (I), a structural unit derived from a monocyclic cyclic olefin, and a branched structural unit, the content ratio of the branched structural unit being 0.005-0.08 mol% of the total repeating structural units in the ring-opening copolymer. (In general formula (I), each of R1-R4 independently represents a hydrogen atom, a chain saturated hydrocarbon group having 1-20 carbon atoms, or a substituent group containing a halogen atom, a silicon atom, an oxygen atom, or a nitrogen atom, and m is 0 or 1. )

Description

technical field [0001] The present invention relates to a ring-opening copolymer, and more particularly, to a ring-opening copolymer capable of forming a rubber cross-linked product excellent in thermal fluidity (easiness of mutual adhesion of aggregates) and excellent in abrasion resistance and a method for producing the ring-opened copolymer. Furthermore, the present invention relates to a rubber composition obtained by using such a ring-opening copolymer, a rubber cross-linked product obtained by using the rubber composition, and a molded body obtained by using the rubber composition or the rubber cross-linked product. Background technique [0002] It is known that normally, by the WCl 6 , MoCl 5 Cyclopentane is prepared in the presence of a so-called Ziegler-Natta catalyst composed of a transition metal compound of Group 6 of the periodic table, and an organometallic activator such as triisobutylaluminum, diethylaluminum chloride, and tetrabutyltin. The alkene and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/08C08L21/00C08L65/00
CPCC08L21/00C08L65/00C08G61/08C08G2261/418C08G2261/3321C08G2261/3324C08G2261/76C08G2261/3325C08G2261/135
Inventor 樱井拓郎
Owner ZEON CORP
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