Process for preparing mercaptoorganyl (alkoxysilanes)

1. A process for preparing mercaptoorganyl(alkoxysilanes) comprising: hydrogenating bis(alkoxysilylorganyl) polysulphides with hydrogen in the presence of at least one alcohol and a doped metal catalyst, wherein the doped metal catalyst comprises at least one substance selected from the group consisting of: iron, iron compound, osmium, osmium compound, ruthenium, ruthenium compound, and at least one doping component, wherein said doping component comprises 0.001% to 15% by weight of said doped metal catalyst.

2. The process for preparing mercaptoorganyl(alkoxysilanes) of claim 1 , wherein the weight conversion is 0.00 1 to 10 g of mercaptoorganyl(alkoxysilane) per mmol of substance of the doped metal catalyst per minute.

3. The process for preparing mercaptoorganyl(alkoxysilanes) of claim 1 , wherein the molar conversion is 0.001 to 50 mmol of mercaptoorganyl(alkoxysilane) per mmol of substance of the doped metal catalyst per minute.

4. The process for preparing mercaptoorganyl(alkoxysilanes) of claim 1 , wherein the hydrogenation is carried out at a temperature of between 100 and 175° C. and under a hydrogen pressure of 5 to 55 bar, and wherein said doping component comprises 0.01%-7.5% by weight of said doped metal catalyst.

5. The process of claim 1 , wherein said doping component is sulphur, tin molybdenum or zirconium.

6. The process of claim 1 , wherein said doped metal catalyst is formed by the absorption, adsorption or deposition of said doping component.

7. The process for preparing mercaptoorganyl(alkoxysilanes) of claim 1 , wherein said mercaptoorganyl(alkoxysilanes) are compounds of the general formula (II):

W-A-SH  (II)

wherein:

W is SiY 1 Y 2 Y 3 or Si(OCH 2 —CH 2 —) 3 N and Y 1 , Y 2 , Y 3 each independently of one another may be hydroxyl (—OH), a linear, branched or cyclic hydrocarbon chain having 1-18 carbon atoms (C1-C18), a linear or branched alkyl acid group (C a H 2a+1 )—C(═O)O—with a=1-25, a linear or branched alkenyl acid group (C b H 2b−1 )—C(═O)O— with b=2-25, a linear or branched substituted alkyl or alkenyl acid group, an unsubstituted, halogen-substituted or alkyl-substituted cycloalkane radical having 5-12 carbon atoms, benzyl radical, a halogen-substituted or alkyl-substituted phenyl radical, a linear or branched alkoxy group, a cycloallcoxy group having 5-12 carbon atoms, a halogen-substituted or alkyl-substituted phenoxy or benzyloxy group, an alkyl ether group O—(CR I 2 —CR I 2 )—O-Alk or alkyl polyether group O—(CR I 2 —CR I 2 O) y -Alk, with y=2-25 and wherein R I independently at each occurrence is H or an alkyl group, Alk being a linear or branched, saturated or unsaturated alkyl chain having 1-30 carbon atoms (C1-C30), and

A is a linear or branched, saturated or unsaturated aliphatic, aromatic or mixedly aliphatic/aromatic divalent C1-C30 hydrocarbon chain.

8. The process for preparing a mercaptoorganyl(alkoxysilane) of claim 7 , wherein said mercaptoorganyl(alkoxysilane) of formula (II) is selected from the group consisting of:

3-mercaptopropyl(trimethoxysilane), 3-mercaptopropyl(dimethoxyhydroxysilane), 3-mercaptopropyl(triethoxysilane), 3-mercaptopropyl(diethoxyhydroxysilane), 3-mercaptopropyl(diethoxymethoxysilane), 3-mercaptopropyl(tripropoxysilane), 3-mercaptopropyl(dipropoxymethoxysilane), 3-mercaptopropyl(dipropoxyhydroxysilane), 3-mercaptopropyl(tridodecanoxysilane), 3-mercaptopropyl(didodecanoxyhydroxysilane), 3-mercaptopropyl(tritetradecanoxysilane), 3-mercaptopropyl(trihexadecanoxysilane), 3-mercaptopropyl(trioctadecanoxysilane), 3-mercaptopropyl(didodecanoxy)tetradecanoxysilane, 3-mercaptopropyl(dodecanoxy)tetradecanoxy(hexadecanoxy)silane, 3-mercaptopropyl(dimethoxymethylsilane), 3-mercaptopropyl(methoxymethylhydroxysilane), 3-mercaptopropyl(methoxydimethylsilane), 3-mercaptopropyl(hydroxydimethylsilane), 3-mercaptopropyl(diethoxymethylsilane), 3-mercaptopropyl(ethoxyhydroxymethylsilane), 3-mercaptopropyl(ethoxydimethylsilane), 3-mercaptopropyl(dipropoxymethylsilane), 3-mercaptopropyl(propoxymethylhydroxysilane), 3-mercaptopropyl(propoxydimethylsilane), 3-mercaptopropyl(diisopropoxymethylsilane), 3-mercaptopropyl(isopropoxydimethylsilane), 3-mercaptopropyl(dibutoxymethylsilane), 3-mercaptopropyl(butoxydimethylsilane), 3-mercaptopropyl(disiobutoxymethylsilane), 3-mercaptopropyl(siobutoxymethylhydroxysilane), 3-mercaptopropyl(isobutoxydimethylsilane), 3-mercaptopropyl(didodecanoxymethylsilane), 3-mercaptopropyl(dodecanoxydimethylsilane), 3-mercaptopropyl(ditetradecanoxymethylsilane), 3-mercaptopropyl(tetradecanoxymethylhydroxysilane), 3-mercaptopropyl(tetradecanoxydimethylsilane), 2-mercaptoethyl(trimethoxysilane), 2-mercaptoethyl(triethoxysilane), 2-mercaptoethyl(diethoxymethoxysilane), 2-mercaptoethyl(tripropoxysilane), 2-mercaptoethyl(dipropoxymethoxysilane), 2-mercaptoethyl(tridodecanoxysilane), 2-mercaptoethyl(tritetradecanoxysilane), 2-mercaptoethyl(trihexadecanoxysilane), 2-mercaptoethyl(trioctadecanoxysilane), 2-mercaptoethyl(didodecanoxy)tetradecanoxysilan, 2-mercaptoethyl(dodecanoxy)tetradecanoxy(hexadecanoxy)silane, 2-mercaptoethyl(dimethoxymethylsilane), 2-mercaptoethyl(methoxymethylhydroxysilane), 2-mercaptoethyl(methoxydimethylsilane), 2-mercaptoethyl(diethoxymethylsilane), 2-mercaptoethyl(ethoxydimethylsilane), 2-mercaptoethyl(hydroxydimethylsilane), 1-mercaptomethyl(trimethoxysilane), 1-mercaptomethyl(triethoxysilane), 1-mercaptomethyl(diethoxymethoxysilane), 1-mercaptomethyl(diethoxyhydroxysilane), 1-mercaptomethyl(dipropoxymethoxysilane), 1-mercaptomethyl(tripropoxysilane), 1-mercaptomethyl(trimethoxysilane), 1-mercaptomethyl(dimethoxymethylsilane), 1-mercaptomethyl(methoxydimethylsilane), 1-mercaptomethyl(diethoxymethylsilane), 1-mercaptomethyl(ethoxymethylhydroxysilane), 1-mercaptomethyl(ethoxydimethylsilane), 3-mercaptobutyl(trimethoxysilane), 3-mercaptobutyl(triethoxysilane), 3-mercaptobutyl(diethoxymethoxysilane), 3-mercaptobutyl(tripropoxysilane), 3-mercaptobutyl(dipropoxymethoxysilane), 3-mercaptobutyl(dimethoxymethylsilane), 3-mercaptobutyl(diethoxymethylsilane), 3-mercaptobutyl(dimethylmethoxysilane), 3-mercaptobutyl(dimethylethoxysilane), 3-mercaptobutyl(dimethylhydroxysilane), 3-mercaptobutyl(tridodecanoxysilane), 3-mercaptobutyl(tritetradecanoxysilane), 3-mercaptobutyl(trihexadecanoxysilane), 3-mercaptobutyl(didodecanoxy)tetradecanoxysilan, 3-mercaptobutyl(dodecanoxy)tetradecanoxy(hexadecanoxy)silane, 3-mercapto-2-methyl-propyl(trimethoxysilane), 3-mercapto-2-methyl-propyl(triethoxysilane), 3-mercapto-2-methyl-propyl(diethoxymethoxysilane), 3-mercapto-2-methyl-propyl(tripropoxysilane), 3-mercapto-2-methyl-propyl(dipropoxymethoxysilane), 3-mercapto-2-methyl-propyl(tridodecanoxysilane), 3-mercapto-2-methyl-propyl(tritetradecanoxysilane), 3-mercapto-2-methyl-propyl(trihexadecanoxysilane), 3-mercapto-2-methyl-propyl(trioctadecanoxysilane), 3-mercapto-2-methyl-propyl(didodecanoxy)tetradecanoxysilane, 3-mercapto-2-methyl-propyl(dodecanoxy)tetradecanoxy(hexadecanoxy)silane, 3-mercapto-2-methyl-propyl(dimethoxymethylsilane), 3-mercapto-2-methyl-propyl(methoxydimethylsilane), 3-mercapto-2-methyl-propyl(diethoxymethylsilane), 3-mercapto-2-methyl-propyl(ethoxydimethylsilane), 3-mercapto-2-methyl-propyl(hydroxydimethylsilane), 3-mercapto-2-methyl-propyl(dipropoxymethylsilane), 3-mercapto-2-methyl-propyl(propoxydimethylsilane), 3-mercapto-2-methyl-propyl(diisopropoxymethylsilane), 3-mercapto-2-methyl-propyl(isopropoxydimethylsilane), 3-mercapto-2-methyl-propyl(dibutoxymethylsilane), 3-mercapto-2-methyl-propyl(butoxydimethylsilane), 3-mercapto-2-methyl-propyl(diisobutoxymethylsilane), 3-mercapto-2-methyl-propyl(isobutoxydimethylsilane), 3-mercapto-2-methyl-propyl(didodecanoxymethylsilane), 3-mercapto-2-methyl-propyl(dodecanoxydimethylsilane), 3-mercapto-2-methyl-propyl(ditetradecanoxymethylsilane), 3-mercapto-2-methyl-propyl(tetradecanoxydimethylsilane), [(C 9 H 19 O—(CH 2 —CH 2 O) 2 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 3 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 4 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 5 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 6 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 2 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 3 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 4 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 5 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 6 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 2 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 3 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 4 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 5 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 6 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 2 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 3 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 4 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 5 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 6 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 2 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 3 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 4 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 5 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 6 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 2 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 3 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 4 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 5 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 6 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 2 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 3 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 4 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 5 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 6 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 2 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 3 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 4 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 5 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 6 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 2 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 3 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 4 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 5 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 6 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 2 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 3 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 4 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 5 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 6 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 2 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 3 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 4 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 5 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 6 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 2 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 3 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 4 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 5 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 6 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 2 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 3 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 4 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 5 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 6 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 2 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 3 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 4 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 5 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 6 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 2 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 3 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 4 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 5 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 6 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 2 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 3 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 4 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 5 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 6 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 2 ] 3 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 3 ] 3 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 4 ] 3 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 5 ] 3 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 6 ] 3 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 2 ] 3 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 3 ] 3 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 4 ] 3 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 5 ] 3 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 6 ] 3 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 2 ] 3 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 3 ] 3 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 4 ] 3 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 5 ] 3 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 6 ] 3 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 2 ] 3 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 3 ] 3 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 4 ] 3 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 5 ] 3 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 6 ] 3 Si(CH 2 ) 3 SH, and HS—CH 2 —CH 2 —CH 2 —Si(OCH 2 —CH 2 —) 3 N.

9. The process for preparing mercaptoorganyl(alkoxysilanes) of claim 8 , wherein the hydrogenation is carried out at a temperature of between 100 and 175° C. and under a hydrogen pressure of 5 to 55 bar.

10. The process for preparing mercaptoorganyl(alkoxysilanes) of claim 9 , wherein said process is carried out in a reaction mixture comprising an additive selected from the group consisting of: a titanium alkoxylate; an amine; water; and an organic or inorganic acid or base.

11. A process for preparing mercaptoorganyl(alkoxysilanes) comprising: hydrogenating bis(alkoxysilylorganyl) polysulphides with hydrogen in the presence of at least one alcohol and a doped metal catalyst, wherein the doped metal catalyst comprises at least one substance selected from the group consisting of: nickel, nickel compound, palladium, palladium compound, rhodium, rhodium compound, iridium and iridium compound, and at least one doping component.

12. The process of claim 11 , wherein said doping component is sulphur, tin molybdenum or zirconium.

13. The process of claim 12 , wherein said doped metal catalyst comprises palladium or a palladium compound and one or more doping components selected from the group consisting of: sulphur, tin and molybdenum.

14. The process of claim 12 , wherein said doped metal catalyst comprises nickel or a nickel compound and zirconium.

15. The process of claim 11 , wherein said doping component comprises 0.01%-7.5% by weight of said doped metal catalyst.

16. The process of claim 11 , wherein said doped metal catalyst is formed by the absorption, adsorption or deposition of said doping component.

17. The process for preparing mercaptoorganyl(alkoxysilanes) of claim 11 , wherein said mercaptoorganyl(alkoxysilanes) are compounds of the general formula (II):

W-A-SH   (II)

wherein:

W is SiY 1 Y 2 Y 3 or Si(OCH 2 —CH 2 —) 3 N and Y 1 , Y 2 , Y 3 each independently of one another may be hydroxyl (—OH), a linear, branched or cyclic hydrocarbon chain having 1-18 carbon atoms (C1-C18), a linear or branched alkyl acid group (C a H 2a+1 )—C(═O )O— with a=1-25, a linear or branched alkenyl acid group (C b H 2b−1 )—C(═O)O— with b=2-25, a linear or branched substituted alkyl or alkenyl acid group, an unsubstituted, halogen-substituted or alkyl-substituted cycloalkane radical having 5-12 carbon atoms, benzyl radical, a halogen-substituted or alkyl-substituted phenyl radical, a linear or branched alkoxy group, a cycloalkoxy group having 5-12 carbon atoms, a halogen-substituted or alkyl-substituted phenoxy or benzyloxy group, an alkyl ether group O—(CR I 2 —CR I 2 )—O-Alk or alkyl polyether group O—(CR I 2 —CR I 2 O) y -Alk, with y=2-25 and wherein R I independently at each occurrence is H or an alkyl group, Alk being a linear or branched, saturated or unsaturated ailcyl chain having 1-30 carbon atoms (C1-C30), and

A is a linear or branched, saturated or unsaturated aliphatic, aromatic or mixedly aliphatic/aromatic divalent C1-C30 hydrocarbon chain.

18. The process for preparing a mercaptoorganyl(alkoxy-silane) of claim 17 , wherein said mercaptoorganyl(alkoxy-silane) of formula (II) is selected from the group consisting of:

3-mercaptopropyl(trimethoxysilane), 3-mercaptopropyl(dimethoxyhydroxysilane), 3-mercaptopropyl(triethoxysilane), 3-mercaptopropyl(diethoxyhydroxysilane), 3-mercaptopropyl(diethoxymethoxysilane), 3-mercaptopropyl(tripropoxysilane), 3-mercaptopropyl(dipropoxymethoxysilane), 3-mercaptopropyl(dipropoxyhydroxysilane), 3-mercaptopropyl(tridodecanoxysilane), 3-mercaptopropyl(didodecanoxyhydroxysilane), 3-mercaptopropyl(tritetradecanoxysilane), 3-mercaptopropyl(trihexadecanoxysilane), 3-mercaptopropyl(trioctadecanoxysilane), 3-mercaptopropyl(didodecanoxy)tetradecanoxysilane, 3-mercaptopropyl(dodecanoxy)tetradecanoxy(hexadecanoxy)silane, 3-mercaptopropyl(dimethoxymethylsilane), 3-mercaptopropyl(methoxymethylhydroxysilane), 3-mercaptopropyl(methoxydimethylsilane), 3-mercaptopropyl(hydroxydimethylsilane), 3-mercaptopropyl(diethoxymethylsilane), 3-mercaptopropyl(ethoxyhydroxymethylsilane), 3-mercaptopropyl(ethoxydimethylsilane), 3-mercaptopropyl(dipropoxymethylsilane), 3-mercaptopropyl(propoxymethylhydroxysilane), 3-mercaptopropyl(propoxydimethylsilane), 3-mercaptopropyl(diisopropoxymethylsilane), 3-mercaptopropyl(isopropoxydimethylsilane), 3-mercaptopropyl(dibutoxymethylsilane), 3-mercaptopropyl(butoxydimethylsilane), 3-mercaptopropyl(disiobutoxymethylsilane), 3-mercaptopropyl(siobutoxymethylhydroxysilane), 3-mercaptopropyl(isobutoxydimethylsilane), 3-mercaptopropyl(didodecanoxymethylsilane), 3-mercaptopropyl(dodecanoxydimethylsilane), 3-mercaptopropyl(ditetradecanoxymethylsilane), 3-mercaptopropyl(tetradecanoxymethylhydroxysilane), 3-mercaptopropyl(tetradecanoxydimethylsilane), 2-mercaptoethyl(trimethoxysilane), 2-mercaptoethyl(triethoxysilane), 2-mercaptoethyl(diethoxymethoxysilane), 2-mercaptoethyl(tripropoxysilane), 2-mercaptoethyl(dipropoxymethoxysilane), 2-mercaptoethyl(tridodecanoxysilane), 2-mercaptoethyl(tritetradecanoxysilane), 2-mercaptoethyl(trihexadecanoxysilane), 2-mercaptoethyl(trioctadecanoxysilane), 2-mercaptoethyl(didodecanoxy)tetradecanoxysilan, 2-mercaptoethyl(dodecanoxy)tetradecanoxy(hexadecanoxy)silane, 2-mercaptoethyl(dimethoxymethylsilane), 2-mercaptoethyl(methoxymethylhydroxysilane), 2-mercaptoethyl(methoxydimethylsilane), 2-mercaptoethyl(diethoxymethylsilane), 2-mercaptoethyl(ethoxydimethylsilane), 2-mercaptoethyl(hydroxydimethylsilane), 1-mercaptomethyl(trimethoxysilane), 1-mercaptomethyl(triethoxysilane), 1-mercaptomethyl(diethoxymethoxysilane), 1-mercaptomethyl(diethoxyhydroxysilane), 1-mercaptomethyl(dipropoxymethoxysilane), 1-mercaptomethyl(tripropoxysilane), 1-mercaptomethyl(trimethoxysilane), 1-mercaptomethyl(dimethoxymethylsilane), 1-mercaptomethyl(methoxydimethylsilane), 1-mercaptomethyl(diethoxymethylsilane), 1-mercaptomethyl(ethoxymethylhydroxysilane), 1-mercaptomethyl(ethoxydimethylsilane), 3-mercaptobutyl(trimethoxysilane), 3-mercaptobutyl(triethoxysilane), 3-mercaptobutyl(diethoxymethoxysilane), 3-mercaptobutyl(tripropoxysilane), 3-mercaptobutyl(dipropoxymethoxysilane), 3-mercaptobutyl(dimethoxymethylsilane), 3-mercaptobutyl(diethoxymethylsilane), 3-mercaptobutyl(dimethylmethoxysilane), 3-mercaptobutyl(dimethylethoxysilane), 3-mercaptobutyl(dimethylhydroxysilane), 3-mercaptobutyl(tridodecanoxysilane), 3-mercaptobutyl(tritetradecanoxysilane), 3-mercaptobutyl(trihexadecanoxysilane), 3-mercaptobutyl(didodecanoxy)tetradecanoxysilan, 3-mercaptobutyl(dodecanoxy)tetradecanoxy(hexadecanoxy)silane, 3-mercapto-2-methyl-propyl(trimethoxysilane), 3-mercapto-2-methyl-propyl(triethoxysilane), 3-mercapto-2-methyl-propyl(diethoxymethoxysilane), 3-mercapto-2-methyl-propyl(tripropoxysilane), 3-mercapto-2-methyl-propyl(dipropoxymethoxysilane), 3-mercapto-2-methyl-propyl(tridodecanoxysilane), 3-mercapto-2-methyl-propyl(tritetradecanoxysilane), 3-mercapto-2-methyl-propyl(trihexadecanoxysilane), 3-mercapto-2-methyl-propyl(trioctadecanoxysilane), 3-mercapto-2-methyl-propyl(didodecanoxy)tetradecanoxysilane, 3-mercapto-2-methyl-propyl(dodecanoxy)tetradecanoxy(hexadecanoxy)silane, 3-mercapto-2-methyl-propyl(dimethoxymethylsilane), 3-mercapto-2-methyl-propyl(methoxydimethylsilane), 3-mercapto-2-methyl-propyl(diethoxymethylsilane), 3-mercapto-2-methyl-propyl(ethoxydimethylsilane), 3-mercapto-2-methyl-propyl(hydroxydimethylsilane), 3-mercapto-2-methyl-propyl(dipropoxymethylsilane), 3-mercapto-2-methyl-propyl(propoxydimethylsilane), 3-mercapto-2-methyl-propyl(diisopropoxymethylsilane), 3-mercapto-2-methyl-propyl(isopropoxydimethylsilane), 3-mercapto-2-methyl-propyl(dibutoxymethylsilane), 3-mercapto-2-methyl-propyl(butoxydimethylsilane), 3-mercapto-2-methyl-propyl(diisobutoxymethylsilane), 3-mercapto-2-methyl-propyl(isobutoxydimethylsilane), 3-mercapto-2-methyl-propyl(didodecanoxymethylsilane), 3-mercapto-2-methyl-propyl(dodecanoxydimethylsilane), 3-mercapto-2-methyl-propyl(ditetradecanoxymethylsilane), 3-mercapto-2-methyl-propyl(tetradecanoxydimethylsilane), [(C 9 H 19 O—(CH 2 —CH 2 O) 2 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 3 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 4 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 5 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 6 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 2 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 3 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 4 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 5 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 6 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 2 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 3 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 4 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 5 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 6 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 2 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 3 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 4 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 5 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 6 ](MeO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 2 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 3 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 4 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 5 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 6 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 2 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 3 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 4 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 5 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 6 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 2 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 3 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 4 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 5 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 6 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 2 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 3 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 4 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 14H 29 O—(CH 2 —CH 2 O) 5 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 6 ] 2 (MeO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 2 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 3 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 4 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 5 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 6 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 2 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 3 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 4 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 5 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 6 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 2 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 3 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 4 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 5 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 6 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 2 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 3 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 4 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 5 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 6 ](EtO) 2 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 2 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 3 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 4 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 5 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 6 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 2 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 3 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 4 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 5 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 6 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 2 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 3 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 4 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 5 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 6 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 2 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 3 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 4 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 5 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 6 ] 2 (EtO)Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 2 ] 3 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 3 ] 3 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 4 ] 3 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 5 ] 3 Si(CH 2 ) 3 SH, [(C 9 H 19 O—(CH 2 —CH 2 O) 6 ] 3 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 2 ] 3 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 3 ] 3 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 4 ] 3 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 5 ] 3 Si(CH 2 ) 3 SH, [(C 12 H 25 O—(CH 2 —CH 2 O) 6 ] 3 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 2 ] 3 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 3 ] 3 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 4 ] 3 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 5 ] 3 Si(CH 2 ) 3 SH, [(C 13 H 27 O—(CH 2 —CH 2 O) 6 ] 3 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 2 ] 3 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 3 ] 3 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 4 ] 3 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 5 ] 3 Si(CH 2 ) 3 SH, [(C 14 H 29 O—(CH 2 —CH 2 O) 6 ] 3 Si(CH 2 ) 3 SH, and HS—CH 2 —CH 2 —CH 2 —Si(OCH 2 —CH 2 —) 3 N.

19. The process for preparing mercaptoorganyl(alkoxysilanes) of claim 18 , wherein said hydrogenation is carried out at a temperature of between 100 and 175° C.; under a hydrogen pressure of 5 to 55 bar and wherein the amount of doping component, based on the weight of the doped metal catalyst, is 0.01%-7.5% by weight.

20. The process for preparing mercaptoorganyl(alkoxysilanes) of claim 19 , wherein said process is carried out in a reaction mixture containing an additive selected from the group consisting of: a titanium alkoxylate; an amine; water; and an organic or inorganic acid or base.