Tire tread reinforced with a silica of very low specific...

Details Tire tread reinforced with a silica of very low specific... Tire tread reinforced with a silica of very low specific...

2003-12-29

2009-02-17

Yoon, Tae H (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...

C524S495000, C152S209100

Reexamination Certificate

active

07491767

ABSTRACT:
A tire tread incorporating an elastomeric composition reinforced with silica, based on at least (phr=parts by weight per hundred parts of diene elastomer):(i) a diene elastomer;(ii) as reinforcing filler, more than 80 phr of an inorganic filler constituted in its entirety or in part by a silica (referred to as LS) having the following characteristics:(a) a BET specific surface area of between 50 and 100 m2/g;(b) an average particle size, dW, of between 50 and 350 nm;(iii) a coupling agent providing the bond between the reinforcing inorganic filler and the diene elastomer;(iv) a vulcanization system based on sulfur.Preferably, this LS silica furthermore has a disagglomeration rate α greater than 5×10−3μm−1/min (measured in the ultrasound disagglomeration test). Compared with a conventional tread for “Green Tires” reinforced with a silica of higher specific surface area, the tread of the invention has an improved compromise of performances in terms of wear resistance, rolling resistance, grip and drift thrust.

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