Silane mixtures and process for preparing same

CA3083055CActive Publication Date: 2026-10-13EVONIK OPERATIONS GMBH
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Patent Information

Application Number
CA3083055
Authority / Receiving Office
CA · CA
Patent Type
Patents
Current Assignee / Owner
Priority Date
2017-11-28
Filing Date
2018-11-16
Publication Date
2026-10-13
Estimated Expiration
2038-11-16
Patent Text Reader

Abstract

The invention relates to silane mixtures which contain a silane of formula <com:Math><semantics>I(R1)v(R2)3−vSi−R3−(S−R4)n−Sx−R5<annotation encoding="application / x-tex">I(R^1)_v(R^2)_{3-v}Si-R^3-(S-R^4)_n-S_x-R^5< / annotation>< / semantics>< / com:Math> (I), and a silane of formula II <com:Math><semantics>(R1)v(R2)3−v<annotation encoding="application / x-tex">(R^1)_v(R^2)_{3-v}< / annotation>< / semantics>< / com:Math>Si-<com:Math><semantics>R3<annotation encoding="application / x-tex">R^3< / annotation>< / semantics>< / com:Math>-Si<com:Math><semantics>(R1)v(R2)3−v<annotation encoding="application / x-tex">(R^1)_v(R^2)_{3-v}< / annotation>< / semantics>< / com:Math> (II), the molar ratio of the silane of formula I to the silane of formula II being 15:85 to 90:10. The silane mixture according to the invention can be prepared by mixing the silanes of formula I with the silanes of formula II.
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Description

Silane mixtures and process for preparing same The invention relates to silane mixtures and to processes for preparation thereof. EP 0670347 and EP 0753549 disclose rubber mixtures comprising at least one crosslinker, a filler, optionally further rubber auxiliaries and at least one reinforcing additive of the formula [Image disponible dans le document PDF, Image available in the PDF document] JP2012149189 discloses the silane of the formula <com:Math><semantics>(R1O)1R(3−1)2Si−R3−(SmR4)n−S−R5<annotation encoding="application / x-tex">(R^1O)_1R^2_{(3-1)}Si-R^3-(S_mR^4)_n-S-R^5< / annotation>< / semantics>< / com:Math> with <com:Math><semantics>R5=−C(=O)−1<annotation encoding="application / x-tex">R^5=-C(=O)-1< / annotation>< / semantics>< / com:Math> <com:Math><semantics>R6<annotation encoding="application / x-tex">R^6< / annotation>< / semantics>< / com:Math> [Image disponible dans le document PDF, Image available in the PDF document] In addition, EP 1375504 discloses silanes of the formula [Image disponible dans le document PDF, Image available in the PDF document] WO 2005 / 059022 discloses rubber mixtures comprising a silane of the formula <com:Math><semantics>[R2R3R4Si−R5−S−R6−R7−]R1<annotation encoding="application / x-tex">[R^2R^3R^4Si-R^5-S-R^6-R^7-]R^1< / annotation>< / semantics>< / com:Math>. Additionally known are rubber mixtures comprising a bifunctional silane and a further silane of the formula (Y)G(Z) (WO 2012 / 092062) and rubber mixtures comprising bistriethoxysilylpropyl polysulfide and bistriethoxysilylpropyl monosulfide (EP1085045). EP 1928949 discloses a rubber mixture comprising the silanes (H<com:Sub>5< / com:Sub>C<com:Sub>2< / com:Sub>O)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-X-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S<com:Sub>2< / com:Sub>- <com:Math><semantics>(CH2)6−X−(CH2)3−Si(OC2H5)3<annotation encoding="application / x-tex">(CH_2)_6-X-(CH_2)_3-Si(OC_2H_5)_3< / annotation>< / semantics>< / com:Math> and / or <com:Math><semantics>(H5C2O)3Si−(CH2)3−X−(CH2)10−S2−(CH2)6−X−(CH2)10−Si(OC2H5)3<annotation encoding="application / x-tex">(H_5C_2O)_3Si-(CH_2)_3-X-(CH_2)_{10}-S_2-(CH_2)_6-X-(CH_2)_{10}-Si(OC_2H_5)_3< / annotation>< / semantics>< / com:Math> and <com:Math><semantics>(H5C2O)3Si−(CH2)3−Sm−(CH2)3−Si(OC2H5)3<annotation encoding="application / x-tex">(H_5C_2O)_3Si-(CH_2)_3-S_{m-}(CH_2)_3-Si(OC_2H_5)_3< / annotation>< / semantics>< / com:Math>. It is an object of the present invention to provide silane mixtures having improved rolling resistance and improved fracture energy density in rubber mixtures compared to silanes known from the prior art. The invention provides a silane mixture comprising a silane of the formula I [Image disponible dans le document PDF, Image available in the PDF document] (l) and a silane of the formula II [Image disponible dans le document PDF, Image available in the PDF document] (II) where R<com:Sup>1< / com:Sup> are the same or different and are C1-C10-alkoxy groups, preferably methoxy or ethoxy groups, phenoxy group, C4-C10-cycloalkoxy groups or alkyl polyether group –O-(R<com:Sup>6< / com:Sup>-O)<com:Sub>r< / com:Sub>-R<com:Sup>7< / com:Sup> where R<com:Sup>6< / com:Sup> are the same or different and are a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic / aromatic divalent C1-C30 hydrocarbon group, preferably -CH<com:Sub>2< / com:Sub>-CH<com:Sub>2< / com:Sub>-, r is an integer from 1 to 30, preferably 3 to 10, and R<com:Sup>7< / com:Sup> is unsubstituted or substituted, branched or unbranched monovalent alkyl, alkenyl, aryl or aralkyl groups, preferably a C<com:Sub>13< / com:Sub>H<com:Sub>27< / com:Sub>-alkyl group, R<com:Sup>2< / com:Sup> is the same or different and is C6-C20-aryl groups, preferably phenyl, C1-C10-alkyl groups, preferably methyl or ethyl, C2-C20-alkenyl group, C7-C20-aralkyl group or halogen, preferably Cl, R<com:Sup>3< / com:Sup> are the same or different and are a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic / aromatic divalent C1-C30 hydrocarbon group, preferably C1-C20, more preferably C1-C10, even more preferably C2-C8, especially preferably CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub> and CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>, R<com:Sup>4< / com:Sup> are the same or different and are a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic / aromatic divalent C1-C30 hydrocarbon group, preferably C1-C20, more preferably C1-C10, even more preferably C2-C7, especially preferably (CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>, x is an integer from 1 to 10, preferably 1 to 4, more preferably 1 or 2, when x is 1 R<com:Sup>5< / com:Sup> is hydrogen or a <com:Math><semantics>−C(=O)−R8<annotation encoding="application / x-tex">-C(=O)-R^8< / annotation>< / semantics>< / com:Math> group with R<com:Sup>8< / com:Sup> = hydrogen, a C1-C20 alkyl group, preferably C1-C17, C6-C20-aryl groups, preferably phenyl, C2-C20-alkenyl group or a C7-C20- aralkyl group and n is 0, 1, 2 or 3, preferably 1, when x is 2 to 10 R<com:Sup>5< / com:Sup> is <com:Math><semantics>−(R4−S)n−R3−Si(R1)y(R2)3−y<annotation encoding="application / x-tex">-(R^4-S)_n-R^3-Si(R^1)_y(R^2)_{3-y}< / annotation>< / semantics>< / com:Math> and n is 1, 2 or 3, preferably 1, and y are the same or different and are 1, 2 or 3, and the molar ratio of silane of the formula I to silane of the formula II is 20:80-90:10, preferably 25:75-90:10, more preferably 30:70-90:10, most preferably 35:65-90:10. Preferably, the silane mixture may comprise a silane of the formula I [Image disponible dans le document PDF, Image available in the PDF document] (l) and a silane of the formula II [Image disponible dans le document PDF, Image available in the PDF document] (II) where n is 1 and R<com:Sup>1< / com:Sup>, R<com:Sup>2< / com:Sup>, R<com:Sup>3< / com:Sup>, R<com:Sup>4< / com:Sup>, R<com:Sup>5< / com:Sup>, x and y have the same definition as described above. The silane mixture according to the invention may comprise further additives or consist solely of silanes of the formula I and silanes of the formula II. The silane mixture according to the invention may comprise oligomers that form as a result of hydrolysis and condensation of the silanes of the formula I and / or silanes of the formula II. The silane mixture according to the invention may have been applied to a support, for example wax, polymer or carbon black. The silane mixture according to the invention may have been applied to a silica, in which case the binding may be physical or chemical. R<com:Sup>3< / com:Sup> and R<com:Sup>4< / com:Sup> may independently be -CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>-, -CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub> [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub> CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub>CH<com:Sub>2< / com:Sub> [Image disponible dans le document PDF, Image available in the PDF document] or R<com:Sup>1< / com:Sup> may preferably be methoxy or ethoxy. Silanes of the formula I may preferably be: <com:Math><semantics>(EtO)3Si−CH2−S2−CH2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-CH_2-S_2-CH_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math>, <com:Math><semantics>(EtO)3Si−(CH2)2−S2−(CH2)2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_2-S_2-(CH_2)_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S2−(CH2)3−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S_2-(CH_2)_3-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−CH2−S4−CH2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-CH_2-S_4-CH_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)2−S4−(CH2)2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_2-S_4-(CH_2)_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S4−(CH2)3−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S_4-(CH_2)_3-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−CH2−S−(CH2)−S2−(CH2)−S−CH2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-CH_2-S-(CH_2)-S_2-(CH_2)-S-CH_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)2−S−(CH2)−S2−(CH2)−S−(CH2)2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_2-S-(CH_2)-S_2-(CH_2)-S-(CH_2)_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)−S2−(CH2)−S−(CH2)3−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)-S_2-(CH_2)-S-(CH_2)_3-Si(OEt)_3< / annotation>< / semantics>< / com:Math> (EtO)<com:Sub>3< / com:Sub>Si-CH<com:Sub>2< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>-S<com:Sub>2< / com:Sub>-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>-S-CH<com:Sub>2< / com:Sub>-Si(OEt)<com:Sub>3< / com:Sub>, (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>-S<com:Sub>2< / com:Sub>-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>-Si(OEt)<com:Sub>3< / com:Sub>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)2−S2−(CH2)2−S−(CH2)3−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_2-S_2-(CH_2)_2-S-(CH_2)_3-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−CH2−S−(CH2)3−S2−(CH2)3−S−CH2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-CH_2-S-(CH_2)_3-S_2-(CH_2)_3-S-CH_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)2−S−(CH2)3−S2−(CH2)3−S−(CH2)2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_2-S-(CH_2)_3-S_2-(CH_2)_3-S-(CH_2)_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)3−S−(CH2)3−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_3-S-(CH_2)_3-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−CH2−S−(CH2)4−S2−(CH2)4−S−CH2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-CH_2-S-(CH_2)_4-S_2-(CH_2)_4-S-CH_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math> (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>4< / com:Sub>-S<com:Sub>2< / com:Sub>-(CH<com:Sub>2< / com:Sub>)<com:Sub>4< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>-Si(OEt)<com:Sub>3< / com:Sub>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)4−S2−(CH2)4−S−(CH2)3−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_4-S_2-(CH_2)_4-S-(CH_2)_3-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−CH2−S−(CH2)5−S2−(CH2)5−S−CH2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-CH_2-S-(CH_2)_5-S_2-(CH_2)_5-S-CH_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math> (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>5< / com:Sub>-S<com:Sub>2< / com:Sub>-(CH<com:Sub>2< / com:Sub>)<com:Sub>5< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>-Si(OEt)<com:Sub>3< / com:Sub>, (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>5< / com:Sub>-S<com:Sub>2< / com:Sub>-(CH<com:Sub>2< / com:Sub>)<com:Sub>5< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-Si(OEt)<com:Sub>3< / com:Sub>, <com:Math><semantics>(EtO)3Si−CH2−S−(CH2)6−S2−(CH2)6−S−CH2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-CH_2-S-(CH_2)_6-S_2-(CH_2)_6-S-CH_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)2−S−(CH2)6−S2−(CH2)6−S−(CH2)2−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_2-S-(CH_2)_6-S_2-(CH_2)_6-S-(CH_2)_2-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)6−S2−(CH2)6−S−(CH2)3−Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_6-S_2-(CH_2)_6-S-(CH_2)_3-Si(OEt)_3.< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−C(=O)−CH3,<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-C(=O)-CH_3,< / annotation>< / semantics>< / com:Math> [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] <com:Math><semantics>(EtO)3Si−(CH2)3−S−C(=O)−C4H9<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-C(=O)-C_4H_9< / annotation>< / semantics>< / com:Math>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−C(=O)−C5H11<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-C(=O)-C_5H_{11}< / annotation>< / semantics>< / com:Math>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−C(=O)−C6H13<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S_-C(=O)-C_6H_{13}< / annotation>< / semantics>< / com:Math>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−C(=O)−C7H15<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S_-C(=O)-C_7H_{15}< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−C(=O)−C9H19<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S_-C(=O)-C_9H_{19}< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−C(=O)−C11H23<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-C(=O)-C_{11}H_{23}< / annotation>< / semantics>< / com:Math>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−C(=O)−C13H27<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-C(=O)-C_{13}H_{27}< / annotation>< / semantics>< / com:Math> [Image disponible dans le document PDF, Image available in the PDF document] (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S<com:Sub>-< / com:Sub>C(=O)-C<com:Sub>17< / com:Sub>H<com:Sub>35< / com:Sub>, 15 <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)−S2C(=O)−CH3,<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)-S_2C(=O)-CH_3,< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)−S−C(=O)−C2H5<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)-S_-C(=O)-C_2H_5< / annotation>< / semantics>< / com:Math>, [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)−S1C(=O)−C5H11<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)-S_1C(=O)-C_5H_{11}< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)−SC(=O)−C6H13<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)-S_C(=O)-C_6H_{13}< / annotation>< / semantics>< / com:Math> (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)- S<com:Sub>-< / com:Sub>C(=O)-C<com:Sub>7< / com:Sub>H<com:Sub>15< / com:Sub>, (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)- S<com:Sub>-< / com:Sub>C(=O)-C<com:Sub>9< / com:Sub>H<com:Sub>19< / com:Sub>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)−S−C(=O)−C11H23<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)-S_-C(=O)-C_{11}H_{23}< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)−S−C(=O)−C13H27<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)-S_-C(=O)-C_{13}H_{27}< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)−S−C(=O)−C15H31<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)-S_-C(=O)-C_{15}H_{31}< / annotation>< / semantics>< / com:Math> (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)- S<com:Sub>-< / com:Sub>C(=O)-C<com:Sub>17< / com:Sub>H<com:Sub>35< / com:Sub>, (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>- S-C(=O)-CH<com:Sub>3< / com:Sub>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)2−S−C(=O)−C2H5<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_2-S-C(=O)-C_2H_5< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)2−S−C(=O)−C3H7,<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_2-S-C(=O)-C_3H_7,< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)2−S−C(=O)−C4H9<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_2-S-C(=O)-C_4H_9< / annotation>< / semantics>< / com:Math>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)2−S−C(=O)−C5H11<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_2-S-C(=O)-C_5H_{11}< / annotation>< / semantics>< / com:Math> (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>- S-C(=O)-C<com:Sub>6< / com:Sub>H<com:Sub>13< / com:Sub>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)2−S−C(=O)−C7H15<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_2-S-C(=O)-C_7H_{15}< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)2−S−C(=O)−C9H19<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_2-S-C(=O)-C_9H_{19}< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)2−S−C(=O)−C11H23<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_2-S-C(=O)-C_{11}H_{23}< / annotation>< / semantics>< / com:Math> (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>- S-C(=O)-C<com:Sub>13< / com:Sub>H<com:Sub>27< / com:Sub>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)2−S−C(=O)−C15H31<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_2-S-C(=O)-C_{15}H_{31}< / annotation>< / semantics>< / com:Math> (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>2< / com:Sub>- S<com:Sub>-< / com:Sub>C(=O)-C<com:Sub>17< / com:Sub>H<com:Sub>35< / com:Sub>, [Image disponible dans le document PDF, Image available in the PDF document] (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>- S<com:Sub>-< / com:Sub>C(=O)-C<com:Sub>2< / com:Sub>H<com:Sub>5< / com:Sub>, [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)6−S−C(=O)−C3H7,<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_6-S-C(=O)-C_3H_7,< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)6−S−C(=O)−C4H9,<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_6-S_-C(=O)-C_4H_9,< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)6−S−C(=O)−C5H11<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_6-S-C(=O)-C_5H_{11}< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)6−S−C(=O)−C6H13<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_6-S_-C(=O)-C_6H_{13}< / annotation>< / semantics>< / com:Math>, (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>- S<com:Sub>-< / com:Sub>C(=O)-C<com:Sub>7< / com:Sub>H<com:Sub>15< / com:Sub>, <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)6−S−C(=O)−C9H19<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_6-S-C(=O)-C_9H_{19}< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)6−S−C(=O)−C11H23<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_6-S-C(=O)-C_{11}H_{23}< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)6−S−C(=O)−C13H27<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_6-S-C(=O)-C_{13}H_{27}< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)6−S−C(=O)−C15H31<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_6-S-C(=O)-C_{15}H_{31}< / annotation>< / semantics>< / com:Math> [Image disponible dans le document PDF, Image available in the PDF document] 25 Especially preferred is the silane of the formula I [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] Silanes of the formula II may preferably be: <com:Math><semantics>(EtO)3Si−(CH2)−S−(CH2)−Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)-S-(CH_2)-Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)2−S−(CH2)2Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_2-S-(CH_2)_2Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)4−S−(CH2)4Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_4-S-(CH_2)_4Si(OEt)_3< / annotation>< / semantics>< / com:Math>, <com:Math><semantics>(EtO)3Si−(CH2)5−S−(CH2)5Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_5-S-(CH_2)_5Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)6−S−(CH2)6Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_6-S-(CH_2)_6Si(OEt)_3< / annotation>< / semantics>< / com:Math>, <com:Math><semantics>(EtO)3Si−(CH2)7−S−(CH2)7Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_7-S-(CH_2)_7Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)8−S−(CH2)8Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_8-S-(CH_2)_8Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)9−S−(CH2)9Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_9-S-(CH_2)_9Si(OEt)_3< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(EtO)3Si−(CH2)10−S−(CH2)10Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_{10}-S-(CH_2)_{10}Si(OEt)_3< / annotation>< / semantics>< / com:Math> Especially preferred is the silane of the formula II <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)3Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_3Si(OEt)_3.< / annotation>< / semantics>< / com:Math> 6 Very particular preference is given to a silane mixture of (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S<com:Sub>2< / com:Sub>-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S- (CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-Si(OEt)<com:Sub>3< / com:Sub>, (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S-C(=O)-CH<com:Sub>3< / com:Sub>, (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S-C(=O)-C<com:Sub>7< / com:Sub>H<com:Sub>15< / com:Sub> or (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S-C(=O)-C<com:Sub>17< / com:Sub>H<com:Sub>35< / com:Sub> and (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. The present invention further provides a process for preparing the silane mixture according to the invention, which is characterized in that the silane of the formula I [Image disponible dans le document PDF, Image available in the PDF document] (l) and a silane of the formula II [Image disponible dans le document PDF, Image available in the PDF document] (II) where R<com:Sup>1< / com:Sup>, R<com:Sup>2< / com:Sup>, R<com:Sup>3< / com:Sup>, R<com:Sup>4< / com:Sup>, R<com:Sup>5< / com:Sup>, n, x and y have the definition given above are mixed in a molar ratio of 20:80-90:10, preferably 25:75-90:10, more preferably 30:70-90:10, most preferably 35:65-90:10. Preferably, a silane of the formula I [Image disponible dans le document PDF, Image available in the PDF document] (l) and a silane of the formula II [Image disponible dans le document PDF, Image available in the PDF document] (II) where R<com:Sup>1< / com:Sup>, R<com:Sup>2< / com:Sup>, R<com:Sup>3< / com:Sup>, R<com:Sup>4< / com:Sup>, R<com:Sup>5< / com:Sup>, x and y have the definition given above and n is 1 can be mixed. The process according to the invention can be conducted with exclusion of air. The process according to the invention can be conducted under protective gas atmosphere, for example under argon or nitrogen, preferably under nitrogen. The process according to the invention can be conducted at standard pressure, elevated pressure or reduced pressure. Preferably, the process according to the invention can be conducted at standard pressure. Elevated pressure may be a pressure of 1.1 bar to 100 bar, preferably of 1.1 bar to 50 bar, more preferably of 1.1 bar to 10 bar and very preferably of 1.1 to 5 bar. Reduced pressure may be a pressure of 1 mbar to 1000 mbar, preferably 250 mbar to 1000 mbar, more preferably 500 mbar to 1000 mbar. The process according to the invention can be conducted between 20°C and 100°C, preferably between 20°C and 50°C, more preferably between 20°C and 30°C. The process according to the invention can be conducted in a solvent, for example methanol, ethanol, propanol, butanol, cyclohexanol, N,N-dimethylformamide, dimethyl sulfoxide, pentane, hexane, cyclohexane, heptane, octane, decane, toluene, xylene, acetone, acetonitrile, carbon tetrachloride, chloroform, dichloromethane, 1,2-dichloroethane, tetrachloroethylene, diethyl ether, methyl tert-butyl ether, methyl ethyl ketone, tetrahydrofuran, dioxane, pyridine or methyl acetate, or a mixture of the aforementioned solvents. The process according to the invention can preferably be conducted without solvent. The silane mixture according to the invention can be used as adhesion promoter between inorganic materials, for example glass beads, glass flakes, glass surfaces, glass fibres, or oxidic fillers, preferably silicas such as precipitated silicas and fumed silicas, and organic polymers, for example thermosets, thermoplastics or elastomers, or as crosslinking agents and surface modifiers for oxidic surfaces. The silane mixture according to the invention can be used as coupling reagents in filled rubber mixtures, examples being tyre treads, industrial rubber articles or footwear soles. Advantages of the silane mixtures according to the invention are improved rolling resistance and improved reinforcement in rubber mixtures. Examples NMR method: The molar ratios and proportions by mass reported as analysis results in the examples come from <com:Sup>13< / com:Sup>C NMR measurements with the following indices: 100.6 MHz, 1000 scans, solvent: CDCl<com:Sub>3< / com:Sub>, internal standard for calibration: tetramethylsilane, relaxation aid: Cr(acac)<com:Sub>3< / com:Sub>; for the determination of the proportion by mass in the product, a defined amount of dimethyl sulfone is added as internal standard and the molar ratios of the products are used to calculate the proportion by mass. Comparative Example 1: 3-octanoylthio-1-propyltriethoxysilane, NXT Silane from Momentive Performance Materials. Comparative Example 2: bistriethoxysilyloctane from ABCR GmbH. Comparative Example 3: bis(triethoxysilylpropyl) disulfide from Evonik Industries AG. Comparative Example 4: 1-chloro-6-thiopropyltriethoxysilylhexane NaOEt (21% in EtOH; 1562 g; 4.820 mol) was metered into mercaptopropyltriethoxysilane (1233 g; 5.170 mol) over the course of 1 h while stirring at room temperature. On completion of addition, the reaction mixture was heated at reflux for 2 h and then left to cool to room temperature. The intermediate formed was metered into 1,6-dichlorohexane (4828 g; 31.14 mol) that had been heated to 80°C over the course of 30 min. On completion of addition, the reaction mixture was heated at reflux for 3 h, before being left to cool to room temperature. The reaction mixture was filtered and the filtercake was rinsed with EtOH. The volatile constituents were removed under reduced pressure and the 1-chloro-6-thiopropyltriethoxysilylhexane intermediate (yield: 89%, molar ratio: 97% 1-chloro-6-thiopropyltriethoxysilylhexane, 3% bis(thiopropyltriethoxysilyl)hexane; % by 8 weight: 95% by weight of 1-chloro-6-thiopropyltriethoxysilylhexane, 5% by weight of 1,6- bis(thiopropyltriethoxysilyl)hexane) was obtained as a colourless to brown liquid. Comparative Example 5: 6-bis(thiopropyltriethoxysilylhexyl) disulfide 6-Bis(thiopropyltriethoxysilylhexyl) disulfide was prepared according to Synthesis Example 1 and Example 1 of EP 1375504. By contrast with Synthesis Example 1 of EP1375504, the intermediate was not distilled. Analysis: (88% yield, molar ratio: silane of the formula I: 94% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>S<com:Sub>2< / com:Sub>(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub> and silane of the formula II: 6% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>, % by weight: silane of the formula I: 95% by weight of (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>S<com:Sub>2< / com:Sub>(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub> and silane of the formula II: 5% by weight of <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)6S(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_6S(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math> Comparative Example 6: S-(6-((3-(triethoxysilyl)propyl)thio)hexyl) thioacetate Na<com:Sub>2< / com:Sub>CO<com:Sub>3< / com:Sub> (59.78 g; 0.564 mol) and an aqueous solution of NaSH (40% in water; 79.04 g; 0.564 mol) were initially charged together with water (97.52 g). Then tetrabutylphosphonium bromide (TBPB) (50% in water; 3.190 g; 0.005 mol) was added and acetyl chloride (40.58 g; 0.517 mol) was added dropwise over the course of 1 h, during which the reaction temperature was kept at 25-32°C. On completion of addition of the acetyl chloride, the mixture was stirred at room temperature for 1 h. Then TBPB (50% in water; 3.190 g; 0.005 mol) and 1-chloro-6-thiopropyltriethoxysilylhexane (from Comparative Example 4; 167.8 g; 0.470 mol) were added and the mixture was heated at reflux for 3-5 h. The progress of the reaction was monitored by means of gas chromatography. Once the 1- chloro-6-thiopropyltriethoxysilylhexane had reacted to an extent of > 96%, water was added until all the salts had dissolved and the phases were separated. The volatile constituents of the organic phase were removed under reduced pressure, and S-(6-((3-(triethoxysilyl)propyl)thio)hexyl) thioacetate (yield: 90%, molar ratio: 97% S-(6-((3-(triethoxysilyl)propyl)thio)hexyl) thioacetate, 3% bis(thiopropyltriethoxysilyl)hexane; % by weight: 96% by weight of S-(6-((3- (triethoxysilyl)propyl)thio)hexyl) thioacetate, 4% by weight of 1,6-bis(thiopropyltriethoxysilyl)hexane) was obtained as a yellow to brown liquid. Comparative Example 7: S-(6-((3-(triethoxysilyl)propyl)thio)hexyl) thiooctanoate Na<com:Sub>2< / com:Sub>CO<com:Sub>3< / com:Sub> (220.2 g; 2.077 mol) and an aqueous solution of NaSH (40% in water; 291.2 g; 2.077 mol) were initially charged together with water (339.2 g). Then tetrabutylammonium bromide (TBAB) (50% in water; 10.96 g; 0.017 mol) was added and octanoyl chloride (307.2 g; 1.889 mol) was added dropwise over the course of 2.5 h, during which the reaction temperature was kept at 24- 28°C. On completion of addition of the octanoyl chloride, the mixture was stirred at room temperature for 1 h. Then TBAB (50% in water; 32.88 g; 0.051 mol) and 1-chloro-6- thiopropyltriethoxysilylhexane (from Comparative Example 4, 606.9 g; 1.700 mol) were added and the mixture was heated at reflux for 10 h. Then water was added until all the salts had dissolved and the phases were separated. The volatile constituents of the organic phase were removed under reduced pressure, and S-(6-((3-(triethoxysilyl)propyl)thio)hexyl) thiooctanoate (yield: 95%, molar ratio: 97% S-(6-((3-(triethoxysilyl)propyl)thio)hexyl) thiooctanoate, 3% 9 bis(thiopropyltriethoxysilyl)hexane; % by weight: 96% by weight of S-(6-((3- (triethoxysilyl)propyl)thio)hexyl) thiooctanoate, 4% by weight of 1,6- bis(thiopropyltriethoxysilyl)hexane) was obtained as a yellow to brown liquid. Comparative Example 8: S-(6-((3-(triethoxysilyl)propyl)thio)hexyl) thiooctadecanoate S-(6-((3-(Triethoxysilyl)propyl)thio)hexyl) thiooctadecanoate was prepared from 1-chloro-6- thiopropyltriethoxysilylhexane (from Comparative Example 4) in accordance with Synthesis Examples 1 and 3 in JP2012149189. S-(6-((3-(Triethoxysilyl)propyl)thio)hexyl) thiooctadecanoate (yield: 89%, molar ratio: 97% S-(6-((3- (triethoxysilyl)propyl)thio)hexyl) thiooctadecanoate, 3% bis(thiopropyltriethoxysilyl)hexane; % by weight: 97% by weight of S-(6-((3-(triethoxysilyl)propyl)thio)hexyl) thiooctadecanoate, 3% by weight of 1,6-bis(thiopropyltriethoxysilyl)hexane) was obtained as a yellow to brown liquid. Comparative Example 9: bis(triethoxysilylpropyl) sulfide To a solution of chloropropyltriethoxysilane (361 g; 1.5 mol; 1.92 eq) in ethanol (360 ml) was added Na<com:Sub>2< / com:Sub>S (61.5 g; 0.78 mol; 1.00 eq) in portions at such a rate as to not exceed 60°C. Completion of addition was followed by heating at reflux for 3 h, before leaving to cool to room temperature. The reaction product was freed of precipitated salts by filtration. By distillative purification (0.04 mbar; 110°C), it was possible to obtain the product (yield: 73%, purity: > 99% by <com:Sup>13< / com:Sup>C NMR) as a clear liquid. Comparative Example 10: 6.84 parts by weight of Comparative Example 1 together with 1.65 parts by weight of Comparative Example 2 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 83% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 17% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>8< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Comparative Example 11: 6.84 parts by weight of Comparative Example 1 together with 2.47 parts by weight of Comparative Example 2 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 77% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 23% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>8< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Comparative Example 12: 6.84 parts by weight of Comparative Example 3 together with 2.65 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to а molar ratio: <com:Math><semantics>71%<annotation encoding="application / x-tex">71\%< / annotation>< / semantics>< / com:Math> (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S<com:Sub>2< / com:Sub>(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub> and 29% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3.< / annotation>< / semantics>< / com:Math> Comparative Example 13: 6.84 parts by weight of Comparative Example 3 together with 3.65 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 64% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S<com:Sub>2< / com:Sub>(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub> and 36% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math>. Comparative Example 14: 6.30 parts by weight of Comparative Example 1 together with 2.53 parts by weight of Comparative Example 2 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 75% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 25% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>8< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Comparative Example 15: 4.20 parts by weight of Comparative Example 1 together with 3.79 parts by weight of Comparative Example 2 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 57% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 43% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>8< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Comparative Example 16: 2.10 parts by weight of Comparative Example 1 together with 5.06 parts by weight of Comparative Example 2 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 33% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 67% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>8< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Comparative Example 17: 4.10 parts by weight of Comparative Example 3 together with 2.44 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 61% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S<com:Sub>2< / com:Sub>(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub> and 39% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3.< / annotation>< / semantics>< / com:Math> Comparative Example 18: 2.74 parts by weight of Comparative Example 3 together with 3.65 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: <com:Math><semantics>41%<annotation encoding="application / x-tex">41\%< / annotation>< / semantics>< / com:Math> (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S<com:Sub>2< / com:Sub>(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub> and 59% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3.< / annotation>< / semantics>< / com:Math> Example 1: 6.84 parts by weight of Comparative Example 1 together with 1.66 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 83% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 17% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 2: 6.84 parts by weight of Comparative Example 1 together with 2.49 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 77% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 23% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 3 6.84 parts by weight of Comparative Example 5 together with 1.71 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 66% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)6S2(CH2)6S(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_6S_2(CH_2)_6S(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math> and 34% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3.< / annotation>< / semantics>< / com:Math> Example 4: 6.84 parts by weight of Comparative Example 5 together with 2.57 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 58% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)6S2(CH2)6S(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_6S_2(CH_2)_6S(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math> and 42% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3.< / annotation>< / semantics>< / com:Math> Example 5: 6.84 parts by weight of Comparative Example 6 together with 1.53 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 80% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCOCH<com:Sub>3< / com:Sub> and 20% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. 11 Example 6: 6.84 parts by weight of Comparative Example 6 together with 2.29 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 74% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCOCH<com:Sub>3< / com:Sub> and 26% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 7: 6.84 parts by weight of Comparative Example 7 together with 1.26 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 80% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 20% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 8: 6.84 parts by weight of Comparative Example 7 together with 1.89 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 74% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 26% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 9: 6.84 parts by weight of Comparative Example 8 together with 0.98 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 80% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>16< / com:Sub>CH<com:Sub>3< / com:Sub> and 20% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 10: 6.84 parts by weight of Comparative Example 8 together with 1.46 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 74% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>16< / com:Sub>CH<com:Sub>3< / com:Sub> and 26% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 11: 8.40 parts by weight of Comparative Example 1 together with 1.28 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 89% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 11% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 12: 6.30 parts by weight of Comparative Example 1 together with 2.55 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 75% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 25% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 13: 4.20 parts by weight of Comparative Example 1 together with 3.83 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 57% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 43% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 14: 2.10 parts by weight of Comparative Example 1 together with 5.10 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 33% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 67% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 15: 8.15 parts by weight of Comparative Example 5 together with 1.28 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 74% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)6S2(CH2)6S(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_6S_2(CH_2)_6S(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math> and 26% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math>. 12 Example 16: 6.11 parts by weight of Comparative Example 5 together with 2.55 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 56% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)6S2(CH2)6S(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_6S_2(CH_2)_6S(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math> and 44% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3.< / annotation>< / semantics>< / com:Math> Example 17: 4.08 parts by weight of Comparative Example 5 together with 3.83 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 38% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)6S2(CH2)6S(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_6S_2(CH_2)_6S(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math> and 62% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3.< / annotation>< / semantics>< / com:Math> Example 18: 9.14 parts by weight of Comparative Example 5 together with 1.28 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 76% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)6S2(CH2)6S(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_6S_2(CH_2)_6S(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math> and 24% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3.< / annotation>< / semantics>< / com:Math> Example 19: 6.86 parts by weight of Comparative Example 5 together with 2.55 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 59% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)6S2(CH2)6S(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_6S_2(CH_2)_6S(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math> and 41% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3.< / annotation>< / semantics>< / com:Math> Example 20: 4.57 parts by weight of Comparative Example 5 together with 3.83 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 40% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)6S2(CH2)6S(CH2)3Si(OEt)3<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_6S_2(CH_2)_6S(CH_2)_3Si(OEt)_3< / annotation>< / semantics>< / com:Math> and 60% <com:Math><semantics>(EtO)3Si(CH2)3S(CH2)3Si(OEt)3.<annotation encoding="application / x-tex">(EtO)_3Si(CH_2)_3S(CH_2)_3Si(OEt)_3.< / annotation>< / semantics>< / com:Math> Example 21: 11.08 parts by weight of Comparative Example 7 together with 1.28 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 85% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 15% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 22: 8.31 parts by weight of Comparative Example 7 together with 2.55 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 72% (EtO)<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math>Si(CH<com:Math><semantics>2<annotation encoding="application / x-tex">_2< / annotation>< / semantics>< / com:Math>)<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math>S(CH<com:Math><semantics>2<annotation encoding="application / x-tex">_2< / annotation>< / semantics>< / com:Math>)<com:Math><semantics>6<annotation encoding="application / x-tex">_6< / annotation>< / semantics>< / com:Math>SCO(CH<com:Math><semantics>2<annotation encoding="application / x-tex">_2< / annotation>< / semantics>< / com:Math>)<com:Math><semantics>6<annotation encoding="application / x-tex">_6< / annotation>< / semantics>< / com:Math>CH<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math> and 28% (EtO)<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math>Si(CH<com:Math><semantics>2<annotation encoding="application / x-tex">_2< / annotation>< / semantics>< / com:Math>)<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math>S(CH<com:Math><semantics>2<annotation encoding="application / x-tex">_2< / annotation>< / semantics>< / com:Math>)<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math>Si(OEt)<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math>. Example 23: 5.54 parts by weight of Comparative Example 7 together with 3.83 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 55% (EtO)<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math>Si(CH<com:Math><semantics>2<annotation encoding="application / x-tex">_2< / annotation>< / semantics>< / com:Math>)<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math>S(CH<com:Math><semantics>2<annotation encoding="application / x-tex">_2< / annotation>< / semantics>< / com:Math>)<com:Math><semantics>6<annotation encoding="application / x-tex">_6< / annotation>< / semantics>< / com:Math>SCO(CH<com:Math><semantics>2<annotation encoding="application / x-tex">_2< / annotation>< / semantics>< / com:Math>)<com:Math><semantics>6<annotation encoding="application / x-tex">_6< / annotation>< / semantics>< / com:Math>CH<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math> and 45% (EtO)<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math>Si(CH<com:Math><semantics>2<annotation encoding="application / x-tex">_2< / annotation>< / semantics>< / com:Math>)<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math>Si(OEt)<com:Math><semantics>3<annotation encoding="application / x-tex">_3< / annotation>< / semantics>< / com:Math>. Example 24: 2.77 parts by weight of Comparative Example 7 together with 5.10 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 32% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>CH<com:Sub>3< / com:Sub> and 68% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 25: 14.32 parts by weight of Comparative Example 8 together with 1.28 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 85% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>16< / com:Sub>CH<com:Sub>3< / com:Sub> and 15% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 26: 10.74 parts by weight of Comparative Example 8 together with 2.55 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 72% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>16< / com:Sub>CH<com:Sub>3< / com:Sub> and 28% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 27: 7.16 parts by weight of Comparative Example 8 together with 3.83 parts by weight of Comparative Example 9 were weighed into a flat PE bag and mixed. This mixture corresponds to a molar ratio: 55% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>SCO(CH<com:Sub>2< / com:Sub>)<com:Sub>16< / com:Sub>CH<com:Sub>3< / com:Sub> 45% (EtO)<com:Sub>3< / com:Sub>Si(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>S(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>Si(OEt)<com:Sub>3< / com:Sub>. Example 28: Rubber tests The formulation used for the rubber mixtures is specified in Table 1 below. The unit phr means parts by weight based on 100 parts of the raw rubber used. The silane mixtures all contain an identical phr amount of silane which reacts with the rubber during the vulcanization. The second silane is added additionally. Table 1: [Image disponible dans le document PDF, Image available in the PDF document] 15 Substances used: a) NR TSR: natural rubber (TSR = technically specified rubber). b) Europrene™ Neocis BR 40, from Polimeri. c) S-SBR: Sprintan® SLR-4601, from Trinseo. d) Silica: ULTRASIL® VN 3 GR from Evonik Industries AG (precipitated silica, BET surface area = 175 m<com:Sup>2< / com:Sup> / g). e) TDAE oil: TDAE = treated distillate aromatic extract. f) 6PPD: N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD). g) DPG: N,N'-diphenylguanidine (DPG). h) CBS: N-cyclohexyl-2-benzothiazolesulfenamide. i) Sulfur: ground sulfur. The mixture was produced by processes customary in the rubber industry in three stages in a laboratory mixer of capacity 300 millilitres to 3 litres, by first mixing, in the first mixing stage (base mixing stage), all the constituents apart from the vulcanization system (sulfur and vulcanization- influencing substances) at 145 to 165°C, target temperatures of 152 to 157°C, for 200 to 600 seconds. In the second stage, the mixture from stage 1 was thoroughly mixed once more, performing what is called a remill. Addition of the vulcanization system in the third stage (ready-mix stage) produced the finished mixture, with mixing at 90 to 120°C for 180 to 300 seconds. All the mixtures were used to produce test specimens by vulcanization under pressure at 160°C-170°C after t95-t100 (measured on a moving disc rheometer to ASTM D 5289-12 / ISO 6502). The general process for producing rubber mixtures and vulcanizates thereof is described in "Rubber Technology Handbook", W. Hofmann, Hanser Verlag 1994. Rubber testing was effected in accordance with the test methods specified in Table 2. The results of the rubber testing are reported in Table 3. Table 2: [Image disponible dans le document PDF, Image available in the PDF document] Table 3: [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] Compared to the comparative mixtures, the inventive mixtures feature a reduced Payne effect, as apparent from the smaller differences for the dynamic storage modulus E' from the Eplexor measurement and the dynamic stiffness G' from the RPA measurement, which results in an improvement in hysteresis characteristics and reduced rolling resistance. Moreover, the silane mixtures according to the invention lead to advantages in bear properties as a result of an improved fracture energy density. Example 29: Rubber tests The formulation used for the rubber mixtures is specified in Table 4 below. The unit phr means parts by weight based on 100 parts of the raw rubber used. In the silane mixtures, some of the silane that reacts with the rubber during the vulcanization is replaced by the second silane which is unreactive toward the rubber. Table 4: [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] 20 Substances used: a) NR TSR: natural rubber (TSR = technically specified rubber). b) Europrene Neocis BR 40, from Polimeri. c) S-SBR: Sprintan® SLR-4601, from Trinseo. d) Silica: ULTRASIL® VN 3 GR from Evonik Industries AG (precipitated silica, BET surface area = 175 m<com:Sup>2< / com:Sup> / g). e) TDAE oil: TDAE = treated distillate aromatic extract. f) 6PPD: <com:Math><semantics>N<annotation encoding="application / x-tex">N< / annotation>< / semantics>< / com:Math>-(1,3-dimethylbutyl)-<com:Math><semantics>N<annotation encoding="application / x-tex">N< / annotation>< / semantics>< / com:Math>'-phenyl-p-phenylenediamine (6PPD). g) DPG: N,N'-diphenylguanidine (DPG). h) CBS: N-cyclohexyl-2-benzothiazolesulfenamide. i) Sulfur: ground sulfur. The mixture was produced in processes customary in the rubber industry in three stages in a laboratory mixer of capacity 300 millilitres to 3 litres, by first mixing, in the first mixing stage (base mixing stage), all the constituents apart from the vulcanization system (sulfur and vulcanization- influencing substances) at 145 to 165°C, target temperatures of 152 to 157°C, for 200 to 600 seconds. In the second stage, the mixture from stage 1 was thoroughly mixed once more, performing what is called a remill. Addition of the vulcanization system in the third stage (ready-mix stage) produced the finished mixture, with mixing at 90 to 120°C for 180 to 300 seconds. All the mixtures were used to produce test specimens by vulcanization under pressure at 160°C-170°C after t95-t100 (measured on a moving disc rheometer to ASTM D 5289-12 / ISO 6502). The general process for producing rubber mixtures and vulcanizates thereof is described in "Rubber Technology Handbook", W. Hofmann, Hanser Verlag 1994. Rubber testing was effected in accordance with the test method specified in Table 5. The results of the rubber testing are reported in Table 6. Table 5: [Image disponible dans le document PDF, Image available in the PDF document] Table 6: [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] The partial exchange of the rubber-reactive silane for the second silane leads to improved rolling resistance (tan <com:Math><semantics>δ<annotation encoding="application / x-tex">\delta< / annotation>< / semantics>< / com:Math> at 10% strain measured at 70°C) in the mixtures according to the invention compared to the comparative mixtures. *** In some aspects, embodiments of the present disclosure include the following items: Item 1. A silane mixture comprising a silane of formula (I) [Image disponible dans le document PDF, Image available in the PDF document] (I), and a silane of formula (II) [Image disponible dans le document PDF, Image available in the PDF document] (II), wherein R<com:Sup>1< / com:Sup> is independently a C1-C10-alkoxy group, phenoxy group, C4-C10-cycloalkoxy group, or alkyl polyether group –O-(R<com:Sup>6< / com:Sup>-O)<com:Sub>r< / com:Sub>-R<com:Sup>7< / com:Sup> where R<com:Sup>6< / com:Sup> is a divalent C1-C30 hydrocarbon group, r is an integer in a range of from 1 to 30, and R<com:Sup>7< / com:Sup> is monovalent alkyl, alkenyl, aryl, or aralkyl group, R<com:Sup>2< / com:Sup> is independently a C6-C20-aryl group, C1-C10-alkyl group, C2-C20-alkenyl group, C7-C20-aralkyl group, or halogen, R<com:Sup>3< / com:Sup> is independently a divalent C1-C30 hydrocarbon group, R<com:Sup>4< / com:Sup> is independently a divalent C1-C30 hydrocarbon group, x is an integer in a range of from 1 to 10, wherein, when x is 1, R<com:Sup>5< / com:Sup> is a –C(=O)-R<com:Sup>8< / com:Sup> group with R<com:Sup>8< / com:Sup> being H, a C1-C20 alkyl group, C6-C20-aryl group, C2-C20-alkenyl group, or a C7-C20-aralkyl group and n is 0, 1, 2, or 3, wherein, when x is in a range of from 2 to 10, <com:Math><semantics>R5<annotation encoding="application / x-tex">R^5< / annotation>< / semantics>< / com:Math> is <com:Math><semantics>−(R4−S)n−R3−Si(R1)y(R2)3−y<annotation encoding="application / x-tex">-(R^4-S)_n-R^3-Si(R^1)_y(R^2)_{3-y}< / annotation>< / semantics>< / com:Math> and n is 1, 2, or 3, and y is independently 1, 2, or 3, or wherein the silane of the formula (I) is (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S<com:Sub>2< / com:Sub>-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>- Si(OEt)<com:Sub>3< / com:Sub>, (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S-C(=O)-CH<com:Sub>3< / com:Sub>, (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S-C(=O)-C<com:Sub>7< / com:Sub>H<com:Sub>15< / com:Sub>, or <com:Math><semantics>(EtO)3Si−(CH2)3−S−(CH2)6−S−C(=O)−C17H35<annotation encoding="application / x-tex">(EtO)_3Si-(CH_2)_3-S-(CH_2)_6-S-C(=O)-C_{17}H_{35}< / annotation>< / semantics>< / com:Math>, and the silane of the formula (II) is <com:Math><semantics>(EtO)3Si−(EtO)3Si−(EtO)3Si−(EtO)3Si−(EtO)3Si−(EtO)3Si−(EtO)3Si−(EtO)3Si−(EtO)3Si−(EtO)3Si−(EtO)3Si−(EtO)3Si−(EtO)<annotation encoding="application / x-tex">(EtO)_3Si-(EtO)_3Si-(EtO)_3Si-(EtO)_3Si-(EtO)_3Si-(EtO)_3Si-(EtO)_3Si-(EtO)_3Si-(EtO)_3Si-(EtO)_3Si-(EtO)_3Si-(EtO)_3Si-(EtO)< / annotation>< / semantics>< / com:Math> <com:Math><semantics>(CH2)3<annotation encoding="application / x-tex">(CH_2)_3< / annotation>< / semantics>< / com:Math>-S-<com:Math><semantics>(CH2)3<annotation encoding="application / x-tex">(CH_2)_3< / annotation>< / semantics>< / com:Math>-Si<com:Math><semantics>(OEt)3<annotation encoding="application / x-tex">(OEt)_3< / annotation>< / semantics>< / com:Math>, and wherein a molar ratio of the silane of the formula (I) to the silane of the formula (II) is in a range of from 20:80 to 90:10. Item 2. The silane mixture of item 1, wherein n is 1. Item 3. The silane mixture of item 1, wherein the molar ratio of the silane of the formula (I) to the silane of the formula (II) is in a range of from 35:65 to 90:10. Item 4. A process for preparing the silane mixture as defined in item 1, the process comprising: mixing the silane of the formula (I) [Image disponible dans le document PDF, Image available in the PDF document] (I), and the silane of the formula (II) [Image disponible dans le document PDF, Image available in the PDF document] (II) in a molar ratio in a range of from 15:85 to 90:10. Item 5. The process of item 4, wherein n is 1. Item 6. The process of item 4, wherein the molar ratio of the silane of the formula (I) to the silane of the formula (II) is in a range of from 35:65 to 90:10. 23 Item 7. The silane mixture of item 1, wherein R<com:Sup>1< / com:Sup> in the silane of the formula (I) and (II) is independently a C1-C10-alkoxy group. Item 8. The silane mixture of item 1, wherein R<com:Sup>1< / com:Sup> in the silane of the formula (I) and (II) is independently a phenoxy group. Item 9. The silane mixture of item 1, wherein R<com:Sup>1< / com:Sup> in the silane of the formula (I) and (II) is independently a C4-C10-cycloalkoxy group. Item 10. The silane mixture of item 1, wherein R<com:Sup>1< / com:Sup> in the silane of the formula (I) and (II) is independently an alkyl polyether group -O-(R<com:Sup>6< / com:Sup>-O)<com:Sub>r< / com:Sub>-R<com:Sup>7< / com:Sup>, wherein R<com:Sup>7< / com:Sup> is a monovalent alkyl, alkenyl, aryl, or aralkyl group. Item 11. The silane mixture of item 1, wherein R<com:Sup>1< / com:Sup> in the silane of the formula (I) and (II) is independently an alkyl polyether group -O-(R<com:Sup>6< / com:Sup>-O)<com:Sub>r< / com:Sub>-R<com:Sup>7< / com:Sup>, and wherein R 7 is a monovalent alkyl. Item 12. The silane mixture of item 1, wherein the silane of the formula (I) is (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S- <com:Math><semantics>(CH2)6<annotation encoding="application / x-tex">(CH_2)_6< / annotation>< / semantics>< / com:Math>-S<com:Sub>2< / com:Sub>-<com:Math><semantics>(CH2)6<annotation encoding="application / x-tex">(CH_2)_6< / annotation>< / semantics>< / com:Math>-S-<com:Math><semantics>(CH2)3<annotation encoding="application / x-tex">(CH_2)_3< / annotation>< / semantics>< / com:Math>-Si<com:Math><semantics>(OEt)3<annotation encoding="application / x-tex">(OEt)_3< / annotation>< / semantics>< / com:Math>. Item 13. The silane mixture of item 1, wherein the silane of the formula (I) is (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S- <com:Math><semantics>(CH2)6<annotation encoding="application / x-tex">(CH_2)_6< / annotation>< / semantics>< / com:Math>-S-C(=O)-CH<com:Sub>3< / com:Sub>. Item 14. The silane mixture of item 1, wherein the silane of the formula (I) is (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S- <com:Math><semantics>(CH2)6<annotation encoding="application / x-tex">(CH_2)_6< / annotation>< / semantics>< / com:Math>-S-C(=O)-C<com:Sub>7< / com:Sub>H<com:Sub>15< / com:Sub>. Item 15. The silane mixture of item 1, wherein the silane of the formula (I) is (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S- <com:Math><semantics>(CH2)6<annotation encoding="application / x-tex">(CH_2)_6< / annotation>< / semantics>< / com:Math>-S-C(=O)-C<com:Sub>17< / com:Sub>H<com:Sub>35< / com:Sub>. Item 16. The process of item 4, wherein the silane of the formula (I) is (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>- <com:Math><semantics>S2<annotation encoding="application / x-tex">S_2< / annotation>< / semantics>< / com:Math>-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-Si(OEt)<com:Sub>3< / com:Sub>. Item 17. The process of item 4, wherein the silane of the formula (I) is (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>— <com:Math><semantics>S−C(=O)−CH3<annotation encoding="application / x-tex">S-C(=O)-CH_3< / annotation>< / semantics>< / com:Math>. Item 18. The process of item 4, wherein the silane of the formula (I) is (EtO)<com:Sub>3< / com:Sub>Si-(CH<com:Sub>2< / com:Sub>)<com:Sub>3< / com:Sub>-S-(CH<com:Sub>2< / com:Sub>)<com:Sub>6< / com:Sub>-S- <com:Math><semantics>C(=O)−C7H15<annotation encoding="application / x-tex">C(=O)-C_7H_{15}< / annotation>< / semantics>< / com:Math> or <com:Math><semantics>(EtO)3<annotation encoding="application / x-tex">(EtO)_3< / annotation>< / semantics>< / com:Math> Si-<com:Math><semantics>(CH2)3<annotation encoding="application / x-tex">(CH_2)_3< / annotation>< / semantics>< / com:Math>-S-<com:Math><semantics>(CH2)6<annotation encoding="application / x-tex">(CH_2)_6< / annotation>< / semantics>< / com:Math>-S-<com:Math><semantics>C(=O)−C17H35<annotation encoding="application / x-tex">C(=O)-C_{17}H_{35}< / annotation>< / semantics>< / com:Math>.

Claims

1. A silane mixture comprising a silane of formula (I) [Image disponible dans le document PDF, Image available in the PDF document] (I), and a silane of formula (II) [Image disponible dans le document PDF, Image available in the PDF document] (II), wherein R 1 is independently a C1-C10-alkoxy group, phenoxy group, C4-C10-cycloalkoxy group, or alkyl polyether group –O-(R 6 -O) r -R 7 where R 6 is a divalent C1-C30 hydrocarbon group, r is an integer in a range of from 1 to 30, and R 7 is monovalent alkyl, alkenyl, aryl, or aralkyl group, R 2 is independently a C6-C20-aryl group, C1-C10-alkyl group, C2-C20-alkenyl group, C7-C20-aralkyl group, or halogen, R 3 is independently a divalent C1-C30 hydrocarbon group, R 4 is independently a divalent C1-C30 hydrocarbon group, x is an integer in a range of from 1 to 10, wherein, when x is 1, R 5 R^5 is a − C ( = O ) − R 8 -C(=O)-R^8 group with R 8 R^8 being H, a C1-C20 alkyl group, C6-C20-aryl group, C2-C20-alkenyl group, or a C7-C20-aralkyl group and n is 0, 1, 2, or 3, wherein, when x is in a range of from 2 to 10, R 5 R^5 is − ( R 4 − S ) n − R 3 − S i ( R 1 ) y ( R 2 ) 3 − y -(R^4-S)_n-R^3-Si(R^1)_y(R^2)_{3-y} and n is 1, 2, or 3, and y is independently 1, 2, or 3, or wherein the silane of the formula (I) is (EtO) 3 Si-(CH 2 ) 3 -S-(CH 2 ) 6 -S 2 -(CH 2 ) 6 -S-(CH 2 ) 3 - Si(OEt) 3 , (EtO) 3 Si-(CH 2 ) 3 -S-(CH 2 ) 6 -S-C(=O)-CH 3 , (EtO) 3 Si-(CH 2 ) 3 -S-(CH 2 ) 6 -S-C(=O)-C 7 H 15 , or (EtO) 3 Si-(CH 2 ) 3 -S-(CH 2 ) 6 -S-C(=O)-C 17 H 35 , and the silane of the formula (II) is (EtO) 3 Si- ( C H 2 ) 3 (CH_2)_3 -S- ( C H 2 ) 3 (CH_2)_3 -Si ( O E t ) 3 (OEt)_3 , and wherein a molar ratio of the silane of the formula (I) to the silane of the formula (II) is in a range of from 20:80 to 90:10.

2. The silane mixture of claim 1, wherein n is 1.

3. The silane mixture of claim 1, wherein the molar ratio of the silane of the formula (I) to the silane of the formula (II) is in a range of from 35:65 to 90:10.

4. A process for preparing the silane mixture as defined in claim 1, the process comprising: mixing the silane of the formula (I) [Image disponible dans le document PDF, Image available in the PDF document] (I), and the silane of the formula (II) [Image disponible dans le document PDF, Image available in the PDF document] (II) in a molar ratio in a range of from 15:85 to 90:10.

5. The process of claim 4, wherein n is 1.

6. The process of claim 4, wherein the molar ratio of the silane of the formula (I) to the silane of the formula (II) is in a range of from 35:65 to 90:10.

7. The silane mixture of claim 1, wherein R 1 in the silane of the formula (I) and (II) is independently a C1-C10-alkoxy group.

8. The silane mixture of claim 1, wherein R 1 in the silane of the formula (I) and (II) is independently a phenoxy group.

9. The silane mixture of claim 1, wherein R 1 in the silane of the formula (I) and (II) is independently a C4-C10-cycloalkoxy group.

10. The silane mixture of claim 1, wherein R 1 in the silane of the formula (I) and (II) is independently an alkyl polyether group -O-(R 6 -O) r -R 7 , wherein R 7 is a monovalent alkyl, alkenyl, aryl, or aralkyl group.

11. The silane mixture of claim 1, wherein R 1 in the silane of the formula (I) and (II) is independently an alkyl polyether group -O-(R 6 -O) r -R 7 , and wherein R 7 is a monovalent alkyl.

12. The silane mixture of claim 1, wherein the silane of the formula (I) is (EtO) 3 Si-(CH 2 ) 3 -S- ( C H 2 ) 6 (CH_2)_6 -S 2 - ( C H 2 ) 6 (CH_2)_6 -S- ( C H 2 ) 3 (CH_2)_3 -Si ( O E t ) 3 (OEt)_3 .

13. The silane mixture of claim 1, wherein the silane of the formula (I) is (EtO) 3 Si-(CH 2 ) 3 -S- ( C H 2 ) 6 (CH_2)_6 -S-C(=O)-CH 3 .

14. The silane mixture of claim 1, wherein the silane of the formula (I) is (EtO) 3 Si-(CH 2 ) 3 -S- ( C H 2 ) 6 (CH_2)_6 -S-C(=O)-C 7 H 15 .

15. The silane mixture of claim 1, wherein the silane of the formula (I) is (EtO) 3 Si-(CH 2 ) 3 -S- ( C H 2 ) 6 (CH_2)_6 -S-C(=O)-C 17 H 35 .

16. The process of claim 4, wherein the silane of the formula (I) is (EtO) 3 Si-(CH 2 ) 3 -S-(CH 2 ) 6 -S 2 - ( C H 2 ) 6 (CH_2)_6 -S- ( C H 2 ) 3 (CH_2)_3 -Si ( O E t ) 3 (OEt)_3 .

17. The process of claim 4, wherein the silane of the formula (I) is (EtO) 3 Si-(CH 2 ) 3 -S-(CH 2 ) 6 — S − C ( = O ) − C H 3 S-C(=O)-CH_3 .

18. The process of claim 4, wherein the silane of the formula (I) is (EtO) 3 Si-(CH 2 ) 3 -S-(CH 2 ) 6 -S- C ( = O ) − C 7 H 15 C(=O)-C_7H_{15} or ( E t O ) 3 (EtO)_3 Si- ( C H 2 ) 3 (CH_2)_3 -S- ( C H 2 ) 6 (CH_2)_6 -S- C ( = O ) − C 17 H 35 C(=O)-C_{17}H_{35} .