40372-72-3 Usage
Uses
Different sources of media describe the Uses of 40372-72-3 differently. You can refer to the following data:
1. Bis[3-(triethoxysilyl)propyl]tetrasulfide is a silylating coupling agent and modifier, and has been used in the design of a new generation of sustainable self-healing styrene-butadiene compounds.
2. Bis[3-(triethoxysilyl)propyl]tetrasulfide is used in radial tires, rubber tire treads, carcass, tire walls, solid rubber tires and other rubber products. It acts as a chemical intermediate and as a cross linking agent. Furthermore, it acts as a coupling agent used to chemically modify silica surface. In addition, it serves as a curing agent for good heat aging.
3. Bis[3-(triethoxysilyl)propyl] tetrasulfide (TESPTS) is generally used as a crosslinking agent and reinforcing filler in the manufacturing of rubber. TESPT film provides corrosion protection to the metallic substrates. It is also used as a precursor in the synthesis of mesoporous organosilicas.
Application
When used in rubber compounds, it produces these effects:
Coupling agent for non-black pigments;
Cure equilibrium for reversion resistance;
Curing agent for good heat aging.
Coupling Agent - With as little as 0.5 to 1.0 phr with clay fillers and 1.0 to 4.0 phr for silica pigments, BIS[3-(TRIETHOXYSILYL)PROPYL]TETRASULFIDE couples the non-black pigment and elastomers resulting in increases in modulus and increase in abrasion resistance.
Cure Equilibrium - BIS[3-(TRIETHOXYSILYL)PROPYL]TETRASULFIDE has four sulfur atoms positioned in the center. At cure temperatures, these participate with sulfur in producing polysulfidic crosslinks. The BIS[3-(TRIETHOXYSILYL)PROPYL]TETRASULFIDE replaces crosslinks broken during cure, resulting in reversion resistant, and with proper compounding, reversion free compounds. This is known as equilibrium cure. The dynamic flex characteristics, E.G., heat generation and crack growth, are dramatically improved.
Curing Agent - Removing all sulfur from the compound for NR, SBR, NBR and replacing it with BIS[3-(TRIETHOXYSILYL)PROPYL]TETRASULFIDE and certain thiuram accelerators, produces compounds with excellent heat aging characteristics in addition to the coupling effects. BIS[3-(TRIETHOXYSILYL)PROPYL]TETRASULFIDE is a silane coupling agent that has crosslinking and accelerator activity in rubber compounds.
Area of rubber industry where they would be beneficial
Footwear - Abrasion resistance | Cutting and chunking resistance | Flex life improvement
Rolls - Abrasion resistance | Aging resistance | Processing | Set reduction (better load bearing) | Reduced water swell | Lower hysteresis
Mechanical Molded Goods - Increased modulus | Better heat aging | Compression set reduction | Dynamic property improvement | Reduced swell to polar liquids | Filler substitution (non-black for black)
Hose - Improved abrasion on cover | Better heat aging | Increased modulus | Lower compression set | Improved adhesion to reinforcing elements
Solid Tires - Improved abrasion | Lower hysteresis | Higher modulus | Improved processing | Possibly better adhesion
Tires - Treads for abrasion, hot tear | Carcass for adhesion and/or filler substitution | Breaker (belt) stocks for adhesion
Belts Flat Belts - Increased abrasion | Improved reversion resistance | Reduced cost with clay substitution for black | Improved cord adhesion | Increased flex life and modulus
V Belts - Increased modulus | Improved abrasion | Longer flex life | Improved adhesion to reinforcing elements
Chemical Properties
Yellowish clear liquid
Check Digit Verification of cas no
The CAS Registry Mumber 40372-72-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,3,7 and 2 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 40372-72:
(7*4)+(6*0)+(5*3)+(4*7)+(3*2)+(2*7)+(1*2)=93
93 % 10 = 3
So 40372-72-3 is a valid CAS Registry Number.
InChI:InChI=1/C18H42O6S4Si2/c1-7-19-29(20-8-2,21-9-3)17-13-15-25-27-28-26-16-14-18-30(22-10-4,23-11-5)24-12-6/h7-18H2,1-6H3
40372-72-3Relevant articles and documents
Method for preparing silane coupling agent Si-69 in water phase
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Paragraph 0024; 0025; 0026; 0030; 0034, (2018/07/30)
The invention relates to a method for preparing a silane coupling agent Si-69 in a water phase, and relates to a preparation method of a compound. The problems that a traditional method for preparingthe silane coupling agent Si-69 is long in reaction time, low in product purity, expensive in raw material price, not easy to store, high in production cost, severe in raw material and product hydrolysis phenomenon, high in operation requirement, and not easy to control a process flow are solved. The method comprises the following steps of (1) preparing a buffer solution; (2) preparing a sodium sulfide solution; (3) synthesizing a polysulfide inorganic phase solution; (4) preparing a catalyst solution; (5) synthesizing the silane coupling agent Si-69; (6) filtering, separating, decoloring, impurity-removing, drying, and purifying the silane coupling agent Si-69. The method provided by the invention has the advantages of short reaction period, high product purity, easiness in storing raw materials, low price of the raw materials, easiness in getting the raw materials, simple operation flow, easiness in controlling process conditions, high yield, easiness in controlling average Sulphur content, and low production cost. The product prepared through the method provided by the invention is high in purity (99 percent or more), not hydrolyzed or sulfur-separated, and long in preservationtime.
PROCESS FOR PREPARING ORGANOSILANES
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Page/Page column 10, (2010/03/02)
The invention relates to a process for preparing organosilanes of the general formula I by reacting (haloorganyl)alkoxysilane of the formula II with hydrous alkali metal hydrogensulphide, sulphur and alkali metal carbonate in alcohol, wherein the molar (haloorganyl)alkoxysilane of the formula II to alkali metal hydrogensulphide ratio is between 1:0.4 and 1:0.75, and the molar alkali metal hydrogensulphide to alkali metal carbonate ratio is between 1:0.5 and 1:1.5.
Process for the preparation of organosilicon compounds
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Page/Page column 3-4, (2008/06/13)
A process for the preparation of an organosilicon compound of the formula (I) [in-line-formulae](R1R2R3SiR4)2Sx??(I) [/in-line-formulae]by reacting haloalkoxysilanes of the general formula (II) [in-line-formulae]R1R2R3SiR4X??(II) [/in-line-formulae]with a dry polysulphide of the general formula (III) [in-line-formulae]M2Sz??(III) [/in-line-formulae]and/or dry sulphide of the general formula IV [in-line-formulae]M2S??(IV) [/in-line-formulae]and optionally sulphur in an organic solvent, the organic solvent being removed from the resulting suspension, the mixture containing the organosilicon compound of the general formula (I) and the solid MX being mixed with water containing at least one buffer, and the resulting phases being separated.
