31001-77-1

Basic information

• Product Name: 3-Mercaptopropylmethyldimethoxysilane
• Synonyms: 3-(dimethoxymethylsilyl)-1-propanethio;gamma-mercaptopropylmethyldimethoxysilane;DIMETHOXY-(3-MERCAPTOPROPYL)METHYLSILANE;3-(DIMETHOXYMETHYLSILYL)-1-PROPANETHIOL;3-MERCAPTOPROPYL(DIMETHOXY)METHYLSILANE;3-MERCAPTOPROPYLMETHYLDIMETHOXYSILANE;3-(dimethoxymethylsilyl)propanethiol;3-Mercaptopropylmethyldimethysilane
• CAS NO: 31001-77-1
• Molecular Formula: C₆H₁₆O₂SSi
• Molecular Weight: 180.34
• EINECS: 250-426-8
• Product Categories: Industrial/Fine Chemicals;Dialkoxysilanes;Si (Classes of Silicon Compounds);Si-O Compounds;Adhesion Promoters;Coupling Agents;Mecapto Silanes;Surface Modifiers
• Mol File: 31001-77-1.mol
• Article Data: 5

Chemical Properties

• Boiling Point: 96 °C30 mm Hg(lit.)
• Flash Point: 199°F
• Appearance: Colorless/Liquid
• Density: 1 g/mL at 25 °C(lit.)
• Vapor Pressure: 0.672mmHg at 25°C
• Refractive Index: n20/D 1.45(lit.)
• PKA: 10.40±0.10(Predicted)
• Water Solubility: Insoluble in water.
• Sensitive: Moisture Sensitive
• BRN: 2424867
• CAS DataBase Reference: 3-Mercaptopropylmethyldimethoxysilane(CAS DataBase Reference)
• NIST Chemistry Reference: 3-Mercaptopropylmethyldimethoxysilane(31001-77-1)
• EPA Substance Registry System: 3-Mercaptopropylmethyldimethoxysilane(31001-77-1)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36
• RIDADR: UN2924
• WGK Germany: 3
• F: 10-23
• TSCA: Yes
• HazardClass: 3
• PackingGroup: III
• Hazardous Substances Data: 31001-77-1(Hazardous Substances Data)

Usage

Introduction

3-Mercaptopropylmethyldimethoxysilane is a bifunctional organosilane possessing a reactive organic mercapto and a hydrolyzable inorganic methoxysilyl group. 3-Mercaptopropylmethyldimethoxysilane is a clear, colorless to light yellow liquid with a slightly mercaptan odor. It is soluble in alcohols, ketones and aliphatic or aromatic hydrocarbons. Applications: 3-Mercaptopropylmethyldimethoxysilane can be used as coupling agent to improve the adhesion of sulfur cured elastomers (polysulfide, polyurethane sealants) to inorganic fillers (such as silica, clay, glass, mica and talc etc.), fiberglass and surfaces. Mineral-reinforced articles such as shoe soles, rubber rollers and wheels, white sidewalls, and wire and cable insulation also can be produced with lower silane loadings. Used to improve properties of mineral filled elastomer, including modulus, tensile and tear strength, heat buildup, abrasion resistance, resilience, compression set and cure time. Used as a pretreatment on minerals or added at the time of compounding. Used to improve low-rolling resistance in silica-reinforced tire tread compounds.

Uses

Different sources of media describe the Uses of 31001-77-1 differently. You can refer to the following data:
1. 3-Mercaptopropylmethyldimethoxysilane can be used to prepare UV laminated adhesive.
2. (3-Mercaptopropyl)methyldimethoxysilane (MPMDMS) can be used as a silane precursor in the synthesis of:Nafion-MPMDMS nanocomposite membranes by sol-gel method.MPMDMS functionalized magnetic- polysilsesquioxane (PSSQ) nanoparticles applicable for heavy metal ions adsorption.Thiol-organosilica nanoparticles.

Flammability and Explosibility

Notclassified

InChI:InChI=1/C6H14O2SSi/c1-7-6(8-2)10-5-3-4-9/h6,9H,3-5H2,1-2H3

Upstream product

• 18171-19-2 3-chloropropylmethyldimethoxysilane 

Downstream Products

• 108857-77-8 3,3'-bis(dimethoxymethylsilylpropyl)disulfide 
• 554-68-7 triethylamine hydrochloride 
• 4756-00-7 Si-Thiol 

Relevant articles and documents

Method for preparing mercaptosilane in virtue of thiourea process

The invention relates to a method for preparing mercaptosilane in virtue of a thiourea process, belonging to the technical field of fine chemical engineering. The method comprises the following steps:dropwise adding an alcoholic solution of thiourea into chloropropyl siloxy silane and dodecyl trimethyl phosphorus bromide, carrying out a condensation reaction and an aging reaction, and conductingstanding for layering to obtain a mercaptosilane product. According to the invention, an isomerization reaction is inhibited by adjusting reaction conditions; the consumption of thiourea is reduced; ethylenediamine is used as a neutralization initiator, so solid by-products can be greatly reduced; and a guanidine salt state can be changed, so a crude product and a salt can be better separated, operation is simplified, and yield is improved.

Catalyst for use in production of epoxide, method for producing the catalyst, and method for producing epoxide

To provide an epoxide-production-use catalyst that is suitably used for producing an epoxide by partial oxidation of an unsaturated hydrocarbon, a catalyst in accordance with the present invention is obtained by fixing gold fine particles to a carrier containing an oxide containing at least one of titanium and zirconium, and has an acid quantity of not more than 0.1 mmol/g determined by the NH3-TPD method. Such a catalyst for epoxide producing use can be produced by, for instance, fixing gold fine particles to a carrier having an acid quantity of not more than 0.15 mmol/g. The catalyst for epoxide producing use arranged as above is preferably used as a catalyst in partial oxidation of an unsaturated hydrocarbon to produce a corresponding epoxide.

Process for the preparation of mercaptosilanes

Mercaptosilanes are prepared from haloorganylsilyl compounds and an alkali metal hydrogen sulfide in the presence of a polar, aprotic medium.