Tire tread compounds comprising partially crosslinked natural ru

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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1522096, 152537, 152547, 156123, 1561286, B29D 3006, B29D 3052, B60C 900, B60C 1100

Patent

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05997673&

ABSTRACT:
In a tire having a tread with cap/base construction, a regulated amount of partially crosslinked natural rubber in a tire tread compound increases the uncured ("green") stiffness, tensile strength and tear resistance of a green compound used for the base without adversely affecting physical properties of the tread after it is cured. Such green stiffness is particularly useful in the construction of a tread for a pneumatic tire, which tread is of cap/base construction because stiffness provides requisite dimensional stability of both cap and base (in the tread) during the curing of the tire. The amount of partially crosslinked natural rubber used in a tread compound depends upon the extent of crosslinking in the natural rubber, the non-crosslinked remainder being virgin latex.

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patent: 4176702 (1979-12-01), Seiberling
patent: 4230649 (1980-10-01), Bohm et al.
patent: 4510291 (1985-04-01), Kawakami
patent: 4818601 (1989-04-01), Itoh et al.
patent: 5174838 (1992-12-01), Sandstrom et al.
patent: 5284195 (1994-02-01), Sandstrom et al.
Blow, Rubber Technology and Manufacture, pp. 32-36, 73-83, 1971.
The Vanderbilt Rubber Handbook, Thirteenth Edition, published by R.T. Vanderbilt Company, Inc. Chapter titled "Natural Rubber" by A. Subraniam, pp. 23-43, 1990.

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