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Copolymer Rubber, Rubber Composition And Rubber Molding

A copolymer and rubber technology, applied in the field of rubber moldings, can solve problems such as unsatisfactory

Inactive Publication Date: 2015-01-07
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of Patent Document 1 cannot satisfy the workability and the balance between the sealability and strength of EPDM.

Method used

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  • Copolymer Rubber, Rubber Composition And Rubber Molding
  • Copolymer Rubber, Rubber Composition And Rubber Molding
  • Copolymer Rubber, Rubber Composition And Rubber Molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0247] Using a polymerizer with a stirring blade of 300 L in volume, the reaction is carried out continuously at 80° C. from ethylene as component [A], propylene as component [B], and 5-ethylene-2-ethylene as component [C]. Quaternary copolymerization reaction of norbornene (ENB) and 5-vinyl-2-norbornene (VNB) as component [D].

[0248] Using hexane (final concentration: 90.8% by weight) as a polymerization solvent, ethylene, propylene, ENB, and VNB were continuously supplied so that the ethylene concentration was 3.1% by weight, the propylene concentration was 4.6% by weight, the ENB concentration was 1.4% by weight, and the VNB concentration was 0.11% by weight.

[0249] While keeping the polymerization pressure at 0.8 MPa, as the main catalyst, use the metallocene catalyst [N-(1,1-dimethylethyl)-1,1-dimethyl Base-1-[(1,2,3,3A,8A-η)-1,5,6,7-tetrahydro-2-methyl-S-benzobiinden-1-yl]aminated silane ( 2-)-κN][(1,2,3,4-η)-1,3-pentadiene]-titanium was continuously supplied to 0....

Embodiment 2～7

[0252] According to the polymerization conditions described in Table 1, a copolymer rubber was obtained in the same manner as in Example 1. Table 1 shows the physical properties of the obtained copolymer rubber.

Embodiment 8

[0297] The rubber composition and tubular sponge of the present invention are obtained by the production method described below. First, the rubber composition before vulcanization and foaming in the rubber composition of the present invention was mixed using MIXTRONBB MIXER (manufactured by Kobe Steel Works, BB-4 type, volume 2.95L, rotor 4WH), and kneaded as follows: Substances: With respect to 100 parts by weight of the copolymer rubber obtained in Example 1, 5 parts by weight of "META-Z102" (trade name; manufactured by Inoue Lime Industry Co., Ltd.) as a vulcanization aid, stearin as a processing aid 2 parts by weight of acid, 2 parts by weight of "Arquad 2HF" (trade name; produced by Lion Akzo Co., Ltd.) as an activator, 120 parts by weight of "Asahi #55G" (trade name, produced by Asahi Carbon Co., Ltd.) as a reinforcing agent 55 parts by weight of "Whiten SB" (trade name, produced by Shiraishi Calcium Co., Ltd.) as an inorganic filler, and "Diana Process Oil PS-430" (trad...

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Abstract

The present invention provides a copolymer rubber which contains only small amounts of impurities and is excellent in kneading processability, extrusion processability and retention of shape and a rubber composition containing the copolymer rubber, and further provides a rubber molded product which is obtained from the rubber composition, is excellent in surface appearance, strength properties, heat aging resistance and weathering resistance and has a low compression set. The copolymer rubber of the present invention comprises structural units derived from [A] ethylene, [B] an ±-olefin of 3 to 20 carbon atoms, [C] a non-conjugated polyene having one double bond between adjacent carbon atoms in one molecule, said double bond being capable of polymerization by a metallocene catalyst, and [D] a non-conjugated polyene having two of the above double bonds in one molecule, and the copolymer rubber satisfies specific requirements (1) to (5).

Description

[0001] This case is filed on December 2, 2008 , the application number is 200880119077.3 , the name of the invention is " Copolymer rubber, rubber composition and rubber molding Divisional application for " technical field [0002] The present invention relates to a copolymer rubber, a rubber composition containing the copolymer rubber, and a rubber molded article obtained by crosslinking the rubber composition. More specifically, the present invention relates to a tetrapolymer rubber formed of ethylene, an α-olefin having 3 to 20 carbon atoms, and two specific non-conjugated polyenes, a rubber composition containing the copolymer rubber, and A rubber molded article obtained by crosslinking the rubber composition. Background technique [0003] Ethylene-α-olefin rubber such as ethylene-propylene copolymer rubber (EPR) and ethylene-propylene-diene copolymer rubber (EPDM) has no unsaturated bonds in the main chain of its molecular structure, so it is conjugated with general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/18C08F4/6592C08L23/08C08J9/06B29C35/02B29C35/08
CPCC08F4/65908C08F2420/01C08F210/18C08F2420/02C08F4/6592C08F210/06C08F236/20C08F2500/25C08F2500/17
Inventor 江端洋树市野光太郎国实正雄
Owner MITSUI CHEM INC
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