Silica-filled elastomeric compounds

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/20 (2006.01) C08K 3/34 (2006.01) C08K 9/04 (2006.01) C08L 23/28 (2006.01)

Patent

CA 2386098

The present invention relates to a process for producing silica-filled halogenated butyl elastomers, in particular bromobutyl elastomers (BIIR) wherein the silica is surface modified with organic compounds containing at least one basic nitrogen-containing group and at least one hydroxyl group prior to admixing the filler with the halobutyl elastomers. Examples of organic compounds useful in such surface modified silicas include proteins. There is also provided a filled halobutyl elastomer composition and cured articles made from such compositions, for example tire treads and tire inner liners.

La présente invention a pour objet un procédé de production d'élastomères de butyle halogéné chargés de silice, en particulier des élastomères de bromobutyle (BIIR) dans lesquels la silice est modifiée en surface au moyen de composés organiques contenant au moins un groupement azoté basique et au moins un groupement hydroxyle avant que la charge soit mélangée avec les élastomères d'halobutyle. Parmi des exemples de composés organiques utiles pour ces silices à surface modifiée, on retrouver des protéines. Une composition d'élastomère d'halobutyle chargée et des articles durcis fabriqués à partir de telles compositions, p. ex., des bandes de roulement et des revêtements intérieurs de pneus, sont divulgués.

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