EP4208469A1 - Verfahren zur herstellung von polysulfansilanen mittels phasentransferkatalyse - Google Patents
Verfahren zur herstellung von polysulfansilanen mittels phasentransferkatalyseInfo
- Publication number
- EP4208469A1 EP4208469A1 EP21769066.8A EP21769066A EP4208469A1 EP 4208469 A1 EP4208469 A1 EP 4208469A1 EP 21769066 A EP21769066 A EP 21769066A EP 4208469 A1 EP4208469 A1 EP 4208469A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- formula
- polysulfansilanes
- catalyst
- preparing
- eto
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
- C07F7/1872—Preparation; Treatments not provided for in C07F7/20
- C07F7/1892—Preparation; Treatments not provided for in C07F7/20 by reactions not provided for in C07F7/1876 - C07F7/1888
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
Definitions
- the invention relates to a process for preparing polysulfansilanes by means of phase transfer catalysis using alkylguanidinium halide as catalyst.
- US Pat. No. 5,468,893 discloses the preparation of polysulfanesilanes using phase transfer catalysis in the presence of an alkali metal halide or alkali metal sulfate.
- EP 19217272.4 discloses the production of polysulfansilanes by means of phase transfer catalysis and subsequent purification of the crude products by means of carrier vapor distillation and/or ozone treatment during or after the reaction.
- CN 108250233 A discloses the preparation of bis(triethoxysilylpropyl)tetrasulfane using a catalyst with the addition of potassium iodide.
- hexabutylguanidinium chloride can be used as a catalyst.
- the crude product is purified by filtration through activated carbon.
- WO 2006/113122 discloses the preparation of thiocarboxylate silanes using phase transfer catalysis and the use of alkylguanidinium salts.
- the object of the present invention is to provide a simple PTC process for preparing polysulfanesilanes, in which the product is free from toxic Minor components and is stable in storage and the monomer content remains relatively constant without the need for additional purification steps.
- the invention relates to a process for the preparation of polysulfanesilanes of the formula I (R 1 ) 3-m R 2 m Si-R 3 -S x -R 3 -SiR 2 m (OR 1 ) 3-m I where R 1 is or are different and C1-C10-alkoxy group, preferably ethoxy or methoxy, particularly preferably ethoxy, phenoxy group or alkyl polyether group -(R'-O) r R" with R' are identical or different and a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic divalent C1-C30 hydrocarbon group, preferably C 2 H 4 , r is an integer from 1 to 30, preferably 5, and R" is unsubstituted or substituted, branched or unbranched monovalent alkyl, alkenyl, aryl or aralkyl group, preferably C11-C15 alkyl group, R 2
- Hal CI
- Y can preferably be equal to N.
- Y can preferably be N, n is 1 and at least two groups of R 4 , R 5 , R 6 , R 7 , R 8 and R 9 are -(CH 2 ) 2 CH 3 , -CH 2 CH 3 or -CH 3 be.
- Y can be N
- n can be 1 and at least four of R 4 , R 5 , R 6 , R 7 , R 8 and R 9 can be -CH 2 CH 3 or -CH 3 .
- Polysulfansilanes of the formula I can be:
- the catalyst of formula III Alkylguanidinium hexaethylguanidinium chloride, Hexapropylguanidiniumchlorid, Dimethyltetrabutylguanidiniumchlorid, Tetramethyldibutylguanidiniumchlorid, Diethyltetrabutylguanidiniumchlorid, Tetrabutyldipropylguanidiniumchlorid, Dibutyltetrapropylguanidiniumchlorid, Diethyltetrapropylguanidiniumchlorid, Tetraethyldipropylguanidiniumchlorid, Tetraethyldibutylguanidiniumchlorid, Tetraethyldipentylguanidiniumchlorid, Tetramethyldipentylguanidiniumchlorid, Dipentyltetrapropylguanidiniumchlorid Tetraethyl
- the base used can preferably be Na 2 CO 3 or NaOH.
- the process according to the invention for preparing polysulfanesilanes of the formula I can be carried out at temperatures of from 25.degree. C. to 200.degree. C., preferably at from 60.degree. C. to 110.degree.
- the phase transfer catalyst of the formula III and then the halosilane of the formula II can be added to the aqueous phase, prepared by M(SH) y , preferably NaSH, a base, preferably NaOH or Na 2 CO3 , preferably in aqueous solution, and sulfur.
- the molar ratio between the halosilane of the formula II used and the M(SH) y used can be between 1.0:0.35 and 1.0:1.0, preferably between 1.0:0.45 and 1.0: 0.55.
- the molar ratio between the halosilane of the formula II used and the base can be between 1.0:0.35 and 1.0:1.0, preferably between 1.0:0.45 and 1.0:0.60 .
- the molar ratio between the halosilane of the formula II used and sulfur can be between 1.0:0.4 and 1.0:3.0, preferably between 1.0:0.5 and 1.0:1.5.
- the molar ratio between the halosilane of the formula II used and the phase transfer catalyst of the formula III can be between 1.0:0.0005 and 1.0:0.05, preferably between 1.0:0.0005 and 1.0:0.005. be.
- the process according to the invention for preparing polysulfanesilanes of the formula I can be carried out without an organic solvent.
- the aqueous phase used can contain process salts from the preliminary batch.
- the amount of the phase transfer catalyst of the formula III can be added partially or completely.
- the aqueous phase can be mixed with the silane of the formula II. Both the aqueous phase can be metered into the halosilane of the formula II and the halosilane of the formula II can be metered into the aqueous phase.
- the halosilane of the formula II is preferably metered into the aqueous phase.
- the halosilane of the formula II can be added in portions or continuously, preferably continuously.
- the process according to the invention can be carried out in an atmospherically open or closed reaction vessel.
- the contents of the reaction vessel can be mixed. External circulation, agitation of the contents of the reaction vessel by gases or stirrers, preferably stirrers, are suitable for mixing the contents of the reaction vessel.
- the process can be carried out continuously or batchwise.
- the aqueous phase can be separated from the organic phase.
- the salt formed as a by-product can be removed by filtration.
- Volatile secondary components can be removed by thin film evaporation.
- the advantage of the process according to the invention is the avoidance of toxic secondary components in the product and contamination of the product by the catalyst and the associated improved storage stability of the product.
- GC Analytical gas chromatography
- a C18 column was used for LC-MS measurements (mobile phase: A: 5 mmol ammonium acetate in water, B: 1-propanol+acetonitrile (1:1 vol%), gradient).
- the target substance was calibrated externally and measured in SIM mode.
- Tetra-n-butylammonium bromide (17 g, 0.03 mol, 0.01 equiv, 50% aqueous solution) and (3-chloropropyl)triethoxysilane (999 g, 4.2 mol, 2.0 equiv) were at 70-80°C successively added to the reaction mixture.
- water (249 g) was added and the phases separated at 71°C.
- the crude product (1.1 kg) was obtained as a yellow liquid.
- Low boilers were then removed using a thin film evaporator at 140° C. and 10 mbar abs. removed so that the bis (triethoxysilylpropyl) tetrasulfane was isolated as the bottom product and then filtered.
- Tetra-n-butylammonium bromide (20 g, 0.03 mol, 0.02 equiv, 50% aqueous solution) and (3-chloropropyl)triethoxysilane (743 g, 3.1 mol, 2.0 equiv) were at 70-80°C successively added to the reaction mixture.
- water (589 g) was added and the phases separated at 71°C.
- the crude product (793 g) was obtained as a yellow liquid.
- Low boilers were then removed using a thin film evaporator at 140° C. and 10 mbar abs. removed so that the bis (triethoxysilylpropyl) disulfane was isolated as the bottom product and then filtered.
- Hexabutylguanidinium chloride (2.8 g, 0.003 mol, 0.004 equiv., 50% aqueous solution) and (3-chloropropyl)triethoxysilane (372 g, 1.5 mol, 2.0 equiv.) were sequentially treated at 70-80°C added to the reaction mixture. The suspension was stirred at 75° C. for 3 hours. After the reaction was complete, water (426 g) was added and the phases separated at 71°C. The crude product (355.32 g) was obtained as a yellow liquid. Low boilers were then removed using a thin film evaporator at 140° C. and 10 mbar abs. removed so that the bis (triethoxysilylpropyl) disulfane was isolated as the bottom product and then filtered.
- Hexabutylguanidinium chloride (1.1 g, 0.001 mol, 0.003 equiv., 50% aqueous solution) and (3-chloropropyl)triethoxysilane (250 g, 1.0 mol, 2.0 equiv.) were sequentially treated at 70-80°C added to the reaction mixture.
- water (98 g) was added and the phases separated at 71°C.
- the crude product (277.91 g) was obtained as an orange to brown liquid.
- Low boilers were then removed using a thin film evaporator at 140° C. and 10 mbar abs. removed so that the bis (triethoxysilylpropyl) tetrasulfane was isolated as the bottom product and then filtered.
- Example 1 Bis(triethoxysilylpropyl)disulfane with tetraethyldibutylguanidinium chloride
- Tetraethyldibutylguandinium chloride (4.1 g, 0.006 mol, 0.008 equiv., 50% aqueous solution) and (3-chloropropyl)triethoxysilane (372 g, 1.5 mol, 2.0 equiv.) were sequentially treated at 70-80°C added to the reaction mixture. The suspension was stirred at 75° C. for 3 hours. After the reaction was complete, water (450.00 g) was added and the phases separated at 71°C. The Crude product (361.16 g) was obtained as a colorless to light green liquid. Low boilers were then removed using a thin film evaporator at 140° C. and 10 mbar abs. removed so that the bis (triethoxysilylpropyl) disulfane was isolated as the bottom product and then filtered.
- Tetraethyldibutylguandinium chloride (3.32 g, 0.005 mol, 0.005 equiv, 50% aqueous solution) and (3-chloropropyl)triethoxysilane (501 g, 2.1 mol, 2.0 equiv) were at 72 °C - 78 ° C added successively to the reaction mixture. The suspension was stirred at 75° C. for 3 hours. After the reaction was complete, water (122.00 g) was added and the phases separated at 70°C. The crude product (559.68 g) was obtained as a dark brown liquid. Low boilers were then removed using a thin film evaporator at 140° C. and 10 mbar abs. removed so that the bis (triethoxysilylpropyl) tetrasulfane was isolated as the bottom product and then filtered.
- Example 3 Bis(triethoxysilylpropyl)tetrasulfane with hexaethylguanidinium chloride
- a mixture of sodium hydroxide 0.730 kg, 18.2 mol, 1.0 equiv.
- sodium hydrosulfide 1.003 kg, 17.9 mol, 0.980 equiv., 40 1% aqueous solution
- water 1.394 kg, 77.4 mol, 4.24 equiv.
- Hexaethylguanidinium chloride (39 g, 0.1 mol, 0.008 equiv, 35% aqueous solution) and (3-chloropropyl)triethoxysilane (8.789 kg, 36.5 mol, 2.0 equiv) were at 106 °C - 112 ° C added successively to the reaction mixture.
- water 2559 kg was added and the phases separated at 80°C.
- the crude product (10.076 kg) was obtained as a yellow liquid.
- Low boilers were then removed using a thin film evaporator at 140° C. and 10 mbar abs. removed so that the bis (triethoxysilylpropyl) tetrasulfane was isolated as the bottom product and then filtered.
- Table 1 shows all the values of Comparative Examples 1-4 and Examples 1-3.
- Comparative Examples 1 and 2 with TBAB as the catalyst show tributylamine (TBA) in the final product.
- TBA is classified as hazardous to health.
- the products made by the process of the invention show no tributylamine (TBA) in the final product.
- Example 3 is compared with Example 1 (preparation of bis(triethoxysilylpropyl)disulfane), the example according to the invention has better storage stability (smaller change in the monomer content).
- Comparing Comparative Example 4 with Examples 2 and 3 both production of bis(triethoxysilylpropyl)tetrasulfane results in better storage stability (less change in the monomer content) for the examples according to the invention.
- Example 4 The materials used are listed in Table 2. The measurement methods used for the mixtures and their vulcanizates were in accordance with Table 3. The rubber mixtures were produced using a GK 1.5 E internal mixer from Harburg Freudenberger Maschinenbau GmbH. Table 2: List of materials used in the examples Table 3: List of physical test methods used in Example 4
- Table 4 Mixture recipe of the L-SBR/BR mixture
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Catalysts (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020211042.5A DE102020211042A1 (de) | 2020-09-02 | 2020-09-02 | Verfahren zur Herstellung von Polysulfansilanen mittels Phasentransferkatalyse |
| PCT/EP2021/073015 WO2022048914A1 (de) | 2020-09-02 | 2021-08-19 | Verfahren zur herstellung von polysulfansilanen mittels phasentransferkatalyse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4208469A1 true EP4208469A1 (de) | 2023-07-12 |
Family
ID=77710728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21769066.8A Pending EP4208469A1 (de) | 2020-09-02 | 2021-08-19 | Verfahren zur herstellung von polysulfansilanen mittels phasentransferkatalyse |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20230265113A1 (de) |
| EP (1) | EP4208469A1 (de) |
| JP (1) | JP2023539365A (de) |
| KR (1) | KR20230061436A (de) |
| CN (1) | CN114195819A (de) |
| BR (1) | BR112023003996A2 (de) |
| DE (1) | DE102020211042A1 (de) |
| WO (1) | WO2022048914A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3838905A1 (de) * | 2019-12-18 | 2021-06-23 | Evonik Operations GmbH | Verfahren zur herstellung von polysulfansilanen mittels phasentransferkatalyse |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5468893A (en) | 1994-07-08 | 1995-11-21 | The Goodyear Tire & Rubber Company | Preparation of sulfur-containing organosilicon compounds |
| US5405985A (en) | 1994-07-08 | 1995-04-11 | The Goodyear Tire & Rubber Company | Preparation of sulfur-containing organosilicon compounds |
| US5583245A (en) | 1996-03-06 | 1996-12-10 | The Goodyear Tire & Rubber Company | Preparation of sulfur-containing organosilicon compounds |
| US5663396A (en) | 1996-10-31 | 1997-09-02 | The Goodyear Tire & Rubber Company | Preparation of sulfur-containing organosilicon compounds |
| DE10034493C1 (de) * | 2000-07-15 | 2001-11-29 | Degussa | Verfahren zur Herstellung von Organosilylalkylpolysulfanen |
| US6384255B1 (en) | 2001-06-29 | 2002-05-07 | Dow Corning Corporation | Process for the preparation of sulfur-containing organosilicon compounds |
| US6448426B1 (en) * | 2001-06-29 | 2002-09-10 | Dow Corning Corporation | Process for the preparation of sulfur-containing organosilicon compounds |
| US6384256B1 (en) | 2001-06-29 | 2002-05-07 | Dow Corning Corporation | Process for the preparation of sulfur-containing organosilicon compounds |
| US6534668B2 (en) | 2001-06-29 | 2003-03-18 | Dow Corning Corporation | Preparation of sulfur-containing organosilicon compounds using a buffered phase transfer catalysis process |
| US6740767B1 (en) | 2002-11-12 | 2004-05-25 | Dow Corning Corporation | Method of making sulfur containing organosilicon compounds |
| ZA200601910B (en) * | 2005-03-07 | 2006-11-29 | Degussa | Process for the preparation of organosilances |
| US7528273B2 (en) * | 2005-04-14 | 2009-05-05 | Momentive Performance Materials Inc. | Aqueous catalytic process for the preparation of thiocarboxylate silane |
| US7151188B1 (en) * | 2005-11-16 | 2006-12-19 | General Electric Company | Process for the production of mercaptoalkylalkoxysilanes |
| CN108250233A (zh) | 2018-01-26 | 2018-07-06 | 青岛科技大学 | 一种在水相中制备硅烷偶联剂—Si-69的方法 |
-
2020
- 2020-09-02 DE DE102020211042.5A patent/DE102020211042A1/de not_active Withdrawn
-
2021
- 2021-04-15 CN CN202110404226.8A patent/CN114195819A/zh active Pending
- 2021-08-19 BR BR112023003996A patent/BR112023003996A2/pt unknown
- 2021-08-19 KR KR1020237010745A patent/KR20230061436A/ko active Pending
- 2021-08-19 WO PCT/EP2021/073015 patent/WO2022048914A1/de not_active Ceased
- 2021-08-19 EP EP21769066.8A patent/EP4208469A1/de active Pending
- 2021-08-19 US US18/043,708 patent/US20230265113A1/en active Pending
- 2021-08-19 JP JP2023514408A patent/JP2023539365A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BR112023003996A2 (pt) | 2023-04-04 |
| WO2022048914A1 (de) | 2022-03-10 |
| DE102020211042A1 (de) | 2022-03-03 |
| JP2023539365A (ja) | 2023-09-13 |
| CN114195819A (zh) | 2022-03-18 |
| KR20230061436A (ko) | 2023-05-08 |
| US20230265113A1 (en) | 2023-08-24 |
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