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Copolymer rubber, rubber composition and rubber molding

A copolymer and rubber technology, applied in the field of rubber molding, can solve problems such as inability to meet

Inactive Publication Date: 2010-11-10
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

[0245] 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].

[0246] 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.

[0247] While keeping the polymerization pressure at 0.8MPa, as the main catalyst, use the metallocene catalyst [N-(1,1-dimethylethyl)-1,1-dimethyl Base-1-[(1,2,3,3A,8A-n)-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 supplied continuously so as ...

Embodiment 2～7

[0250] 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

[0295] 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 "Arquad2HF" (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" (tra...

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Abstract

A copolymer rubber reduced in the content of impurities therein and excellent in suitability for kneading, extrudability, and shape retentivity; a rubber composition containing the copolymer rubber; and a rubber molding obtained from the rubber composition, the molding being excellent in surface appearance, strength properties, resistance to thermal deterioration, and weatherability and reduced in compression set. The copolymer rubber is characterized by comprising structural units derived from: ethylene [A]; a C3-20 alpha-olefin [B]; an unconjugated polyene [C] which has, per molecule, one double bond between adjoining carbon atoms and is polymerizable with a metallocene catalyst; and an unconjugated polyene [D] having two double bonds of that kind per molecule. The rubber is further characterized by satisfying specific requirements (1) to (5).

Description

technical field [0001] 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 [0002] 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-purpose Compared with diene rubber, it has excellent heat aging resistance, weather resistance, and ozone resistance, and can be widely used in applications such as automotive parts, electric wire materials, ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/18C08F4/6592
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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