Vulcanizable elastomer compositions containing...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 21/00 (2006.01) B60C 1/00 (2006.01) C08K 3/00 (2006.01) C08K 3/04 (2006.01) C08K 3/36 (2006.01) C08K 5/5419 (2006.01) C08L 7/00 (2006.01)

Patent

CA 2438708

The present invention provides a vulcanizable elastomer composition comprising100 parts by weight of an elastomer; about 5 to about 80 parts by weight of reinforcing filler, per 100 parts of the elastomer, including a starch/emulsion styrene butadiene copolymer; about 1 to about 6 parts by weight of a coupling agent, per 100 parts of the elastomer, said coupling agent having a moiety reactive with the hydroxyl groups of the starch/emulsion styrene butadiene copolymer and a second moiety reactive with said elastomer; about 40 to about 115 parts of an additional reinforcing filler, per 100 parts of the elastomer, wherein said filler is selected from the group consisting of carbon black, silica and mixtures thereof; and about 0.2 to about 5 parts of a curing agent, per 100 parts of the elastomer. A process is also provided for the preparation of a vulcanized elastomer composition according to the present invention. The vulcanized elastomeric compound of the present invention has goods physical properties for use as a tread stock for pneumatic tires.

L'invention concerne une composition d'élastomère vulcanisable comprenant 100 parts en poids d'élastomère; environ 5 à environ 80 parts en poids de charge renforçante, pour 100 parts d'élastomère, y compris un copolymère amidon/butadiène styrène en émulsion; environ 1 à environ 6 parts en poids d'un agent de couplage, pour 100 parts d'élastomère, ledit agent de couplage présentant une fraction qui réagit avec les groupes hydroxyle du copolymère amidon/butadiène styrène en émulsion et une seconde fraction qui réagit avec ledit élastomère; environ 40 à environ 115 parts d'une charge renforçante additionnelle, pour 100 parts d'élastomère, ladite charge renforçante étant choisie dans le groupe formé de noir de carbone, de silice et de mélanges de ces derniers; et environ 0,2 à environ 5 parts d'un agent vulcanisant, pour cent parts d'élastomère. L'invention concerne également un procédé de préparation d'une composition d'élastomère vulcanisé. Le composé élastomère vulcanisé selon l'invention présente de bonnes propriétés physiques qui permettent de l'utiliser comme bande de roulement de pneumatiques.

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