Rubber mixtures based on non-vulcanised rubber and...

C - Chemistry – Metallurgy – 08 – L

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C08L 21/00 (2006.01) C08G 18/69 (2006.01) C08G 18/78 (2006.01) C08G 18/79 (2006.01) C08L 19/00 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2419362

The invention relates to rubber mixture, comprising non-vulcanised, double- bounded rubber (A), vulcanised rubber particles (B) and multifunctional isocyanates based on polyurethane (C). According to the invention, the proportion of component (B) in the mixture in relation to 100 wt. parts (phr) of component (A) is 1-150 wt. parts, and the proportion of multifunctional isocyanates based on polyurethane (component C) can amount to 1 - 100 wt. parts. The inventive mixtures can be used to produce vulcanised rubber and rubber shaped bodies of all types, wherein the vulcanisates thus produced comprise an advantageous combination of mechanical properties, for example, tensile stress at 300 % elongation, elongation at rupture, resistance to tearing and resistance to abrasion.

La présente invention concerne des mélanges de caoutchoucs constitués de caoutchoucs non réticulés comprenant des doubles liaisons (A), de particules de caoutchouc réticulées (B), ainsi que d'isocyanates à fonctions multiples à base polyuret (C). Selon l'invention, respectivement sur 100 parties pondérales (phr) du composé de caoutchouc (A), la contribution au mélange du composé (B) représente de 1 à 150 parties pondérales et la contribution des isocyanates à fonctions multiples à base polyuret (composé C) représente de 1 à 100 parties pondérales. Lesdits mélanges peuvent être utilisés pour produire des caoutchoucs vulcanisés et des corps moulés en caoutchouc de tous types, les produits vulcanisés ainsi obtenus présentant une combinaison avantageuse de propriétés mécaniques telles que la résistance à la traction pour un allongement de 300 %, l'allongement à la rupture, la résistance à la rupture, et la résistance à l'abrasion.

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