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AssigneeBayer Aktiengesellschaft
InventorsWerner Obrecht, Anthony Sumner
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The invention relates to rubber compounds comprising at least one double bond-containing rubber, additions of rubber gels, phenolic resin adducts or phenol/formaldehyde condensation products, such as resols or novolaks, and optionally, further fillers and rubber auxiliary substances, and the vulcanizates and molded rubber articles produced from them The rubber compounds according to the present invention are characterized in the uncrosslinked state by good processability (compound viscosity ML 1+4/100° C.<60 ME) and in the vulcanized state by Shore-A hardness values/23° C.>60, high impact resilience values E/23° C.>60% and a low specific density. The vulcanizates are suitable for the production of industrial rubber articles and for various tire components, such as roll coverings, conveyor belt coverings, belts, spinning cops, seals, golf ball cores, shoe soles and bead compounds, tire carcasses, subtread compounds and tire sidewalls. The compounds are particularly suitable for producing reinforced sidewalls for tires with emergency running properties (inserts for run flat tires).
Rubber compounds comprising uncrosslinked, double bond-containing rubbers (A), crosslinked rubber particles (B) and phenolic resin adducts or condensed phenolic resins (C), whereby the double bond-containing rubbers (A) are present in quantities of 100 parts by weight, the crosslinked rubber particles (B) in quantities of 10 to 150 parts by weight and the phenolic resin adducts or condensed phenolic resins (C) in quantities of 0.1 to 50 parts by weight.
Rubber vulcanizates comprising rubber compounds, which comprise uncrosslinked, double bond-containing rubbers (A), crosslinked rubber particles (B) and phenolic resin adducts or condensed phenolic resins (C), whereby the double bond-containing rubbers (A) are present in quantities of 100 parts by weight, the crosslinked rubber particles (B) in quantities of 10 to 150 parts by weight and the phenolic resin adducts or condensed phenolic resins (C) in quantities of 0.1 to 50 parts by weight.
Molded rubber articles comprising rubber compounds, which comprise uncrosslinked, double bond-containing rubbers (A), crosslinked rubber particles (B) and phenolic resin adducts or condensed phenolic resins (C), whereby the double bond-containing rubbers (A) are present in quantities of 100 parts by weight, the crosslinked rubber particles (B) in quantities of 10 to 150 parts by weight and the phenolic resin adducts or condensed phenolic resins (C) in quantities of 0.1 to 50 parts by weight.
Dependencies are inferred from the claim text.