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Cyclopentene ring-opening copolymer and method for producing same

A manufacturing method and technology of cyclopentene, applied in tire parts, transportation and packaging, special tires, etc., can solve problems such as poor productivity and poor thermal fluidity

Active Publication Date: 2019-10-08
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the other hand, since the cyclopentene ring-opened polymer does not have a branch in the main chain, it is considered to have mutual adhesion in a high-temperature environment, and there is a problem that the productivity is poor due to poor thermal fluidity

Method used

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  • Cyclopentene ring-opening copolymer and method for producing same
  • Cyclopentene ring-opening copolymer and method for producing same
  • Cyclopentene ring-opening copolymer and method for producing same

Examples

Experimental program
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Embodiment

[0129] Hereinafter, the present invention will be further described based on detailed examples, but the present invention is not limited to these examples. In addition, in the following, "part" is a weight standard unless otherwise indicated. In addition, tests and evaluations were performed as follows.

[0130] [Molecular weight of cyclopentene ring-opened copolymer]

[0131] The weight-average molecular weight (Mw) and the molecular weight distribution (Mw / Mn) were obtained based on a polystyrene-equivalent molecular weight graph by gel permeation chromatography (GPC), and were determined based on the graph. In addition, the specific measurement conditions of the gel permeation chromatography are as follows.

[0132] Measuring device: HLC-8320EcoSCE (manufactured by Tosoh Corporation)

[0133] Column: Two pieces of GMH-HR-H (manufactured by Tosoh Corporation) were connected in series.

[0134] Detector: Differential refractometer RI-8320 (manufactured by Tosoh Corporatio...

preparation example 1

[0150] Preparation of diisobutyl monomethoxide aluminum / toluene solution (2.5% by weight)

[0151] In a nitrogen atmosphere, 61 parts of toluene and 7.8 parts of a 25.4% by weight triisobutylaluminum / n-hexane solution (manufactured by Tosoh Finechem Co., Ltd.) were added to a glass container containing a stirring bar. Next, the container was cooled to -45°C, vigorously stirred, and 0.32 parts (equal molar amount with respect to triisobutylaluminum) of methanol were slowly added dropwise. Thereafter, it was left to stand at room temperature while stirring, and a diisobutylmonomethoxide / toluene solution (2.5% by weight) was prepared.

Synthetic example 1

[0153] Under nitrogen, in a pressure-resistant glass reaction vessel with a stirrer, add 500 parts of cyclopentene, 0.34 parts of norbornadiene (NBD), 1.42 parts of 1,2-bis(triethoxysilyl) Ethylene and 10 parts of the 2.5% by weight diisobutylaluminum monomethoxide / toluene solution prepared in Preparation Example 1 were heated to 50°C. To this was added 29 parts of 1.0 wt% WCl 6 / toluene solution, and carry out the polymerization reaction at 50° C. for 4 hours. After 4 hours of polymerization, an excess of ethanol was added to the pressure-resistant glass reaction vessel to terminate the polymerization. After that, the solution in the pressure-resistant glass reaction vessel was injected into extreme excess of ethanol. Next, the precipitated polymer was recovered, washed with ethanol, and vacuum-dried at 40° C. for 3 days to obtain 210 parts of a cyclopentene / norbornadiene ring-opened copolymer. pass 1 H-NMR spectrum measurement and various two-dimensional NMR spectrum mea...

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Abstract

A cyclopentene ring-opening copolymer having a branched structure, wherein the cyclopentene ring-opening copolymer includes a structure in which at least four cyclopentene ring-opening polymer chainsare connected via branched-structure monomers, and at least some of the cyclopentene ring-opening polymer chains are end-modified.

Description

technical field [0001] The present invention relates to cyclopentene ring-opening copolymer and its preparation method. Background technique [0002] A cyclopentene ring-opened polymer is known as one of synthetic rubbers being studied as a substitute material for butadiene rubber. The cyclopentene ring-opened polymer is obtained as a linear rubber polymer having no branches in the main chain by subjecting cyclopentene to ring-opening metathesis polymerization. In addition, the terminal of the main chain can be modified by adding a terminal modifying agent as a chain transfer agent during polymerization. Therefore, the cyclopentene ring-opened polymer can form a rubber cross-linked product with low heat generation (low fuel consumption) and excellent wet grip. [0003] On the other hand, since the cyclopentene ring-opened polymer does not have a branch in the main chain, it is considered to have mutual adhesion in a high-temperature environment, and has a problem of poor p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/08B60C1/00C08L21/00C08L65/00
CPCC08G61/08C08G2261/418C08G2261/135C08G2261/76C08L65/00C08G2261/122C08G2261/3321C08G2261/3323C08G2261/3324C08G2261/1644C08G2261/1414C08G2261/132B60C1/00B60C1/0016B60C1/0025C08L9/06
Inventor 似鸟广幸奥野晋吾角替靖男
Owner ZEON CORP
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