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Diene polymer and process for producing the same

A technology of polymers and compounds, applied in the field of diene polymers

Inactive Publication Date: 2008-09-03
SUMITOMO CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] On the other hand, the ethylene-cyclopentane alternating copolymer obtained by coordination ring-opening polymerization and disclosed in Macromolecules, Vol. high melting point, the copolymer needs to be molded at a high temperature of 200°C or higher, and (ii) the polymer product of the coordination ring-opening polymerization needs to be further hydrogenated in order to obtain an ethylene-cyclopentane alternating copolymer, although This copolymer has a ring structure in the main chain that contributes to heat resistance

Method used

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  • Diene polymer and process for producing the same
  • Diene polymer and process for producing the same
  • Diene polymer and process for producing the same

Examples

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Embodiment

[0169] The invention is explained with reference to the following examples, which do not limit the scope of the invention.

reference example 1

[0171] The preparation of 4-(tert-butyldimethylsilyloxy group)-1,6-heptadiene represented by formula (3)

[0172] Into a 100 ml two-necked flask was charged 6.5 g of imidazole manufactured by Wako Pure Chemical Industries, and then 50 ml of anhydrous N,N-dimethylformamide manufactured by the above company and 5.78 ml of 1 , 6-heptadien-4-ol. The resulting mixture was cooled to 0 °C. To this mixture was added 6.5 g of tert-butyldimethylsilyl chloride manufactured by Tokyo Chemical Industry Co., Ltd., and the resulting mixture was stirred at room temperature for 12 hours. An excess of water was then added thereto to terminate the reaction. The product contained in the reaction mixture was extracted with hexane, and the obtained organic extract was dried over anhydrous sodium sulfate manufactured by Nacalai Tesque Inc. Company. The dried hexane solution was vacuum distilled to obtain 2.88 g (30% yield) of 4-(tert-butyldimethylsilyloxy)-1,6-heptadiene as a transparent colorless...

reference example 2

[0174] The preparation of 4-(triisopropylsilyloxy group)-1,6-heptadiene represented by formula (3)

[0175] To a 50 ml-Schlenk tube was added 1.35 g of imidazole manufactured by Wako Pure Chemical Industries, and then 10 ml of anhydrous N,N-dimethylformamide manufactured by the above company and 1.2 ml of 1 manufactured by Aldrich Chemical Company, 6-Heptadien-4-ol. The resulting mixture was cooled to 0 °C. To this mixture was added 1.93 ml of triisopropylsilyl chloride manufactured by Tokyo Chemical Industry Co., Ltd., and the resulting mixture was stirred at room temperature for 85 hours. An excess of water was then added thereto to terminate the reaction. The product contained in the reaction mixture was extracted with hexane, and the obtained organic extract was dried over anhydrous sodium sulfate manufactured by Nacalai Tesque Inc. Company. The dried hexane solution was vacuum distilled at 93° C. and 21 mmHg to obtain 1.1 g (46 percent yield) of 4-(triisopropylsilyloxy...

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Abstract

The present invention provides a polymer containing units represented by the defined formula (1); and a process for producing the polymer, which comprises the step of polymerizing a compound represented by the defined formula (3), the units represented by the formula (1) being polymerized units of the compound represented by the formula (3) such as 1,6-heptadiene.

Description

technical field [0001] The present invention relates to a diene polymer having an excellent balance between heat resistance and processability, and a method for producing the diene polymer. Background of the invention [0002] The heat-resistant A diene polymer with an excellent balance of properties and processability. The reason is that one of the two carbon-carbon double bonds participates not in an addition polymerization reaction, but an undesired reaction such as a crosslinking reaction, although the other carbon-carbon double bond participates in an addition polymerization reaction, and as a result, only A polymer is obtained which (i) has no ring structures in the main chain which contribute to heat resistance and (ii) is not necessarily a thermoplastic polymer which contributes to processability. [0003] On the other hand, the ethylene-cyclopentane alternating copolymer obtained by coordination ring-opening polymerization and disclosed in Macromolecules, Vol. hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F136/20C08F4/54
CPCC08F36/20C08F4/7042
Inventor 小坂田耕太郎竹内大介朴世训松浦龙一植村真藤田正行
Owner SUMITOMO CHEM CO LTD