Elastomeric compositions, process for the preparation...

Details Elastomeric compositions, process for the preparation... Elastomeric compositions, process for the preparation...

C - Chemistry, Metallurgy

08

L

400/3047, 400/64

C08L 9/06 (2006.01) B60C 1/00 (2006.01) C08L 9/00 (2006.01)

Patent

CA 1326722

A B S T R A C T ELASTOMERIC COMPOSITIONS, PROCESS FOR THE PREPARATION THEREOF AND TYRES CONTAINING THEM An elastomeric composition suitable for use in the tread portion of a tyre comprises (1) 10-90 %wt of copolymer A of a mono-aromatic vinyl compound and a conjugated diene, containing 10-40 %wt of mono-aromatic vinyl compound and having a vinyl content of at least 50 %wt and a Tg > 35 °C, and (2) 90-10 %wt of polymer B which is a homopolymer of a conjugated diene or a copolymer of a mono-aromatic vinyl compound and a conjugated diene, polymer B containing < 25 %wt of mono-aromatic vinyl compound and having a vinyl content < 25% and a Tg < -55 °C, polymers A and B having a differential content of aromatic vinyl compound which varies less than 5 percentage points, as determined by monomer conversion; and process for the preparation of the composition by mixing A and B.

579219

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