RUBBER COMPOSITION AND PNEUMATIC TIRE USING THE SAME

Title:

RUBBER COMPOSITION AND PNEUMATIC TIRE USING THE SAME

Document Type and Number:

WIPO Patent Application WO/2005/082995

Kind Code:

A1

Abstract:

A rubber composition which comprises (i) a conjugated diene based rubber gel exhibiting a toluene swelling index of 16 to 70, (ii) a diene based rubber such as natural rubber, a polyisoprene rubber, an aromatic vinyl-conjugated diene copolymer rubber and/or a polybutadiene rubber, and optionally (iii) carbon black and/or silica; and (a) a pneumatic tire using the above composition in a high hardness reinforcing layer extending along a tire side wall from a bead section, which is improved in the fluidity and dimensional stability in extruding molding, with the retention of satisfactory hardness of a high hardness reinforcing rubber, (b) a pneumatic tire using the above composition in both end portions of an extruded tire tread, which is improved in its processability and dimensional stability in extruding molding, with the retention of flex fatigue characteristics in both end portions of a tread, and (c) a pneumatic tire using the above composition as an under tread having a thickness of 1.5 to 6 mm, which has a relatively thick under tread exhibiting a high elastic modulus and is excellent in processability and driving stability.

Inventors:

AMINO NAOYA (JP)
HIZA MISAO (JP)
SHIROKAWA TAKASHI (JP)
NAKAMURA MASAO (JP)
ENDO KOICHI (JP)

Application Number:

PCT/JP2005/003252

Publication Date:

September 09, 2005

Filing Date:

February 22, 2005

Export Citation:

Click for automatic bibliography generation Help

Assignee:

YOKOHAMA RUBBER CO LTD (JP)
ZEON CORP (JP)
AMINO NAOYA (JP)
HIZA MISAO (JP)
SHIROKAWA TAKASHI (JP)
NAKAMURA MASAO (JP)
ENDO KOICHI (JP)

International Classes:

B60C1/00; B60C11/00; B60C15/06; C08K3/04; C08K3/34; C08L7/00; C08L9/00; C08L9/06; C08L21/00; (IPC1-7): C08L7/00; B60C1/00; B60C11/00; C08K3/04; C08K3/34; C08L9/06

Domestic Patent References:

WO2002010273A1

2002-02-07

Foreign References:

JP2002060437A	2002-02-26
JP2001139726A	2001-05-22
JP2001354807A	2001-12-25

Other References: