Dynasol Elastomeros, S.a. De C.v.

Dynasol Elastómeros, S.a.u.

Sergio Corona Galván

Christopher J Hardiman

Sergio Alberto Moctezuma Espiricueto

Daniel Abraham Elizarrarás Maya

Luis Antonio Rodríguez Guadarrama

Pedro Filipe Ribeiro Da Costa

Pedro José Pérez Romero

María Del Mar Díaz Requejo

Álvaro Beltrán Martín

Carlos Miguel Da Silva Costa

Senetxu Lanceros Méndez

The present invention relates to a process for the functionalization of a rubber polymer comprising reacting the rubber polymer with at least one source of nitrene or carbene, in the presence of a catalyst of formula TpAg, wherein Tprepresents a hydrotris(pyrazolyl)borate ligand. This process leads to selective rubber functionalization without secondary reactions such as chain scission or cross linking and produces functionalized rubbers with improved compatibilization properties. The invention also refers to the polymer produced therefrom and to uses of said polymer.

Functionalized rubbers

Polar modifier systems based on a blend of DTHFP, ETE, TMEDA, DMTHFMA and/or functionally similar compounds with BDMAEE and SMT are used to make block copolymers having high levels of pendant vinyl double bond repeat units, which is through highly selective 1,2-bond butadiene addition, low vinylcyclopentane formation, unimodal narrow molecular weight distribution, and a low level of randomized co-monomer repeat units. The block copolymers have very high levels of 1,2-vinyl content and high 3,4-vinyl bond addition of the conjugated diene monomer and low vinylcyclopentane content. The polar modifier systems provide a fast polymerization rate, with a unimodal narrow molecular weight distribution. The polar modifier systems allow operation at a higher temperature than in prior art systems, which reduces cooling requirements.

Polar modifier systems for high vinyl block copolymerization

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Las Rozas, Spain

Sergio Corona Galván