RUBBER COMPOSITIONS FOR TIRES - MITSUI CHEMICALS INC

Title:

RUBBER COMPOSITIONS FOR TIRES

Document Type and Number:

WIPO Patent Application WO/1998/031745

Kind Code:

A1

Abstract:

A rubber composition for tire sidewalls excellent in strength characteristics and resistance to fatigue from flexing and capable of giving fuel-saving tire sidewalls, which comprises (A) an unsaturated olefin copolymer prepared from (i) ethylene, (ii) an aromatic vinyl compound, (iii) a non-conjugated polyene and, if necessary, (iv) an $g(a)-olefin having 3 or more carbon atoms and having a (i) to (iv) molar ratio ranging from 100/0 to 40/60, a [(i) + (iv)] to (ii) molar ratio ranging from 98/2 to 60/40, an intrinsic viscosity [�$g(m)] of 1.0 to 6.0 dl/g as determined at 135 �C in decalin, and an iodine value of 10 to 50 and (B) a diene rubber. A rubber composition for tire treads capable of giving tire treads being excellent in strength characteristics, abrasion resistance and braking performance on the wet road surface (resistance to wet skid) and exhibiting low rolling resistance, which comprises (A') an unsaturated olefin copolymer prepared from (i) ethylene, (ii) an aromatic vinyl compound, (iii) a non-conjugated polyene and (iv) an $g(a)-olefin having 3 or more carbon atoms and having a (i) to (iv) molar ratio ranging from 100/0 to 40/60 and a [(i) + (iv)] to (ii) molar ratio ranging from 99/1 to 85/15, and (B) a diene rubber at a (A') to (B) weight ratio of 1/99 to 50/50.

Inventors:

OKADA KEIJI (JP)
MORIZONO KENICHI (JP)
TAKIMOTO KAZUYUKI (JP)
MATSUMOTO TETSUHIRO (JP)
KAWASAKI MASAAKI (JP)
TOJO TETSUO (JP)

Application Number:

PCT/JP1998/000216

Publication Date:

July 23, 1998

Filing Date:

January 21, 1998

Export Citation:

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Assignee:

MITSUI CHEMICALS INC (JP)
OKADA KEIJI (JP)
MORIZONO KENICHI (JP)
TAKIMOTO KAZUYUKI (JP)
MATSUMOTO TETSUHIRO (JP)
KAWASAKI MASAAKI (JP)
TOJO TETSUO (JP)

International Classes:

B60C1/00; C08L21/00; C08L23/16; C08L23/08; (IPC1-7): C08L23/18; B60C1/00; C08L9/00

Foreign References:

JPH0770368A

1995-03-14

Other References: