PREPARING RUBBER MIXTURE REINFORCED WITH SILICON DIOXIDE WITH LOW LEVEL OF RELEASING VOLATILE ORGANIC COMPOUNDS (VOC) Russian patent published in 2011 - IPC C08G77/22 C08L21/00 B60C1/00 

FIELD: chemistry.

SUBSTANCE: disclosed is alkoxy-modified silsesquioxane, containing one or more compounds selected from alkoxy-modified silsesquioxanes having formula and mixtures thereof, where w, x and y are molar ratios, y is not equal to zero, either w or x, but not both simultaneously, can be equal to zero and w+x+y=1.0; R¹, R² and R³ are identical or different and are selected from a group comprising (i) H or alkyl C₁-C₂₀ groups, (ii) cycloalkyl C₃-C₂₀ groups, (iii) alkylaryl C₇-C₂₀ groups and (iv) R⁵X, where X is selected from a group comprising CI, Br, SH, SaR⁶, NR⁶ ₂, OR⁶, CO₂H, SCOR⁶, CO₂R⁶, OH, olefins, epoxides, amine groups, vinyl groups, acrylates and methacrylates, where a = 1-8, R⁵ is selected from alkylene C₁-C₂₀ groups and cycloalkylene C₃-C₂₀ groups, and R⁴ and R⁶ are selected from alkyl C₁-C₅ groups, cycloalkyl C₃-C₂₀ groups and alkylaryl C₇-C₂₀ groups. The invention also discloses a method of producing said alkoxy-modified silsesquioxanes, a vulcanised rubber mixture containing said silsesquioxanes and a method of preparing said mixture, as well as a pneumatic tyre made from said vulcanised rubber mixture.

EFFECT: low release of volatile organic compounds when preparing and processing vulcanised rubber mixtures which are prepared using the disclosed alkoxy-modified silsesquioxane, improved rubber reinforcement, high degree of the polymer-filler interaction and low viscosity of the said vulcanised rubber mixture, which enables to make pneumatic tyres with improved operational properties.

80 cl, 4 dwg, 36 tbl, 26 ex