Rubber composition for belt use and rubber belt

Details Rubber composition for belt use and rubber belt Rubber composition for belt use and rubber belt

2011-01-18

2011-01-18

Choi, Ling-Siu (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S526000

Reexamination Certificate

active

07872066

ABSTRACT:
The invention provides a rubber composition for belt use suitable for industrial rubber belts with less energy loss and excellent durability such resistance to flex crack growth.The rubber composition for belt use comprises (A) 90-5 mass % of a vinyl-cis-polybutadiene rubber including (b) 1-30 mass % of specific syndiotactic 1,2-polybutadiene crystal fibers having an average fiber length of crystal fibers equal to 200 nm or below, an average aspect ratio of 10 or lower, the number of crystal fibers having a fiber length of 200 nm or below equal to 90 or more per 25 μm2, and a melting point of 170° C. or higher, and (a) 99-70 mass % of a cis-polybutadiene rubber; (B) 10-95 mass % of a diene-based rubber other than (A); and (C) 20-70 parts by mass of a rubber reinforcing agent compounded on the basis of 100 parts by mass of the rubber components (A)+(B), wherein the rubber reinforcing agent (C) contains at least carbon black and silica, wherein the compounding amount of the silica in the rubber reinforcing agent is 70 mass % or less.

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DATABASE WPI Week 200612 Thomson Scientific, London, GB; AN 2006-113559 & JP 2006 022243 A; UBE IND. LTD.; Jan. 26, 2006.
DATABASE WPI Week 200612 Thomson Scientific, London, GB; AN 2006-113560 & JP 2006 022244 A; UBE IND. LTD.; Jan. 26, 2006.
DATABASE WPI Week 200612 Thomson Scientific, London, GB; AN 2006-113561 & JP 2006 022246 A; UBE IND. LTD.; Jan. 26, 2006.

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