COPOLYMER RUBBER, RUBBER COMPOSITION, AND MOLDED RUBBER

COPOLYMER RUBBER, RUBBER COMPOSITION, AND MOLDED RUBBER

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...

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Hauptverfasser: ICHINO, KOTARO, EBATA, HIROKI, KUNIZANE, MASAO
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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creator ICHINO, KOTARO
EBATA, HIROKI
KUNIZANE, MASAO
description 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).
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subjects CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
title COPOLYMER RUBBER, RUBBER COMPOSITION, AND MOLDED RUBBER
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