# US 10,870,744 B2 · Sulfur-crosslinkable rubber mixture, vulcanizate of the rubber mixture, and vehicle tyre > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,870,744 B2 - Document ID: US10870744B2 - Status: Granted - Kind: B2 - Application number: 16/763,736 - Filed: 2018-08-09 - Published: 2020-11-05 - Granted: 2020-12-22 - Earliest claimed: 2017-11-28 - Assignees: Continental Reifen Deutschland GmbH - Applicants: Continental Reifen Deutschland GmbH - Inventors: Julia Schoeffel; Norbert Mueller; Carla Recker - Web page: https://patentgrep.com/patent/US10870744B2 ## CPC - C08L 7/00: Compositions of natural rubber - C08L 9/06: Copolymers with styrene - B29B 7/7495: {for mixing rubber} - C08K 3/36: Silica - C08K 5/372: Sulfides {, e.g. R-(S)x-R'} - C08K 5/548: containing sulfur {(C08K5/5477 takes precedence)} - C08L 9/00: Compositions of homopolymers or copolymers of conjugated diene hydrocarbons - B29K 2009/06: SB polymers, i.e. butadiene-styrene polymers - B29K 2509/02: Ceramics - C08L 2205/03: containing three or more polymers in a blend - C08L 2207/04: Thermoplastic elastomer - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B29B: PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS ## Abstract The invention relates to a sulfur-crosslinkable rubber mixture, to a vulcanizate thereof and to a vehicle tire. The sulfur-crosslinkable rubber mixture contains at least the following constituents: at least one diene rubber; and 10 to 300 phr of at least one silica; and 1 to 22 phf of at least one silane A having general empirical formula A-I) (R1)oSi—R2—(S—R3)q—Sx—(R3—S)q—R2—Si(R1)o; and A-I) 0.5 to 30 phf of at least one silane B having general empirical formula B-I) (R1)oSi—R2—(S—R3)u—S—R2—Si(R1)o B-I) wherein x is an integer from 2 to 10, q is 0, 1, 2 or 3 and u is 1, 2 or 3. ## Claims ### Claim 1 A sulfur-crosslinkable rubber mixture comprising at least the following constituents: at least one diene rubber; and 10 to 300 phr of at least one silica; and 1 to 22 phf (parts per hundred parts of filler by weight) of at least one silane A having general empirical formula A-I) (R1)oSi—R2—(S—R3)q—Sx—(R3—S)q—R2—Si(R1)o; and A-I) 0.5 to 30 phf of at least one silane B having general empirical formula B-I) (R1)oSi—R2—(S—R3)u—S—R2—Si(R1)o B-I) wherein o may be 1 or 2 or 3; wherein the radicals R1 may be identical or different and are selected from C1-C10-alkoxy groups, C6-C20-phenoxy groups, C2-C10-cyclic dialkoxy groups, C2-C10-dialkoxy groups, C4-C10-cycloalkoxy groups, C6-C20-aryl groups, C1-C10-alkyl groups, C2-C20-alkenyl groups, C2-C20-alkynyl groups, C7-C20-aralkyl groups, halides or alkyl polyether group —O—(R6—O)r—R7, wherein the radicals R6 are identical or different and are branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic divalent C1-C30-hydrocarbon group, r is an integer from 1 to 30, and the radicals R7 are unsubstituted or substituted, branched or unbranched monovalent alkyl, alkenyl, aryl or aralkyl groups, or two R1 correspond to a dialkoxy group having 2 to 10 carbon atoms wherein in that case o<3, or two or more silanes of formulae A-I) and/or B-I) may be bridged via radicals R1 or by condensation; with the proviso that in the formulae A-I) and B-I) in each (R′)oSi group at least one R1 is selected from the abovementioned options, wherein this R1 i) is bonded to the silicon atom via an oxygen atom or ii) is a halide; wherein the radicals R2 and R3 in each molecule and within a molecule may be identical or different and are branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic divalent C1-C30-hydrocarbon groups; and, wherein x is an integer from 2 to 10 and q is 0 or 1 or 2 or 3; and wherein u is 1 or 2 or 3. ### Claim 2 (depends on 1) The sulfur-crosslinkable rubber mixture according to claim 1, wherein q is 0 or 1. ### Claim 3 (depends on 1) The sulfur-crosslinkable rubber mixture according to claim 1, wherein u is 1. ### Claim 4 (depends on 1) The sulfur-crosslinkable rubber mixture according to claim 1, wherein R2 is an alkyl group having 2 or 3 carbon atoms. ### Claim 5 (depends on 1) The sulfur-crosslinkable rubber mixture according to claim 1, wherein R3 is an alkyl group having 4 to 8 carbon atoms. ### Claim 6 (depends on 1) The sulfur-crosslinkable rubber mixture according to claim 1, wherein the silane A has the following structure conforming to formula A-II): and, wherein x is an integer from 2 to 10. ### Claim 7 (depends on 1) The sulfur-crosslinkable rubber mixture according to claim 1, wherein the silane A has the following structure conforming to formula A-III): (EtO)3Si—(CH2)3—Sx—(CH2)3—Si(EtO)3; and, A-III) wherein x is an integer from 2 to 10. ### Claim 8 (depends on 1) The sulfur-crosslinkable rubber mixture according to claim 1, wherein x is an integer from 2 to 4, preferably 2. ### Claim 9 (depends on 1) The sulfur-crosslinkable rubber mixture according to claim 1, wherein the silane B has the following structure conforming to formula B-II): ### Claim 10 (depends on 1) The sulfur-crosslinkable rubber mixture according to claim 1, wherein the molar ratio of silanes A present to silanes B present is 19:81 to 81:19. ### Claim 11 (depends on 1) The sulfur-crosslinkable rubber mixture according to claim 1, wherein the diene rubber is selected from the group consisting of natural polyisoprene (NR), synthetic polyisoprene (IR), butadiene rubber (BR), solution-polymerized stirene-butadiene rubber (SSBR) and emulsion-polymerized stirene-butadiene rubber (ESBR). ### Claim 12 (depends on 11) The sulfur-crosslinkable rubber mixture according to claim 11, wherein the sulfur-crosslinkable rubber mixture contains 5 to 30 phr of at least one natural and/or at least one synthetic polyisoprene and 25 to 80 phr of at least one stirene-butadiene rubber and 5 to 50 phr of at least one butadiene rubber. ### Claim 13 (depends on 1) A vulcanizate obtained by sulfur vulcanization of at least one rubber mixture according to claim 1. ### Claim 14 (depends on 13) A vehicle tire comprising at least one component part based upon at least one vulcanizate according to claim 13. ### Claim 15 (depends on 14) The vehicle tire according to claim 14 comprising the at least one vulcanizate in a tread of the vehicle tire.