1,3-Bis(3-Chloropropyl)-1,1,3,3-Tetramethyldisiloxane: The Key Ingredient in Silicone Rubber Manufacturing

Silicone rubber is a popular material used in various industries, including automotive, construction, and electronics. It offers excellent durability, stability, and resistance to extreme temperatures and chemicals. The key ingredient in silicone rubber is a compound called 1,3-Bis(3-chloropropyl)-1,1,3,3-tetramethyldisiloxane, or BCDMS for short. In this article, we'll explore the properties, applications, and manufacturing of BCDMS, and its importance in silicone rubber production.

Properties of BCDMS

BCDMS is a colorless liquid with a molecular weight of 295.9 g/mol and a boiling point of 216-220°C. It has a density of 0.93 g/mL and a refractive index of 1.419. BCDMS is soluble in organic solvents such as toluene, xylene, and chloroform, but insoluble in water. It is a highly reactive compound and can undergo various chemical reactions, such as hydrosilation, halogenation, and condensation.

Applications of BCDMS

BCDMS is used primarily in the production of silicone rubber. It is a crosslinking agent that reacts with the polymer chains of silicone to form a three-dimensional network, which gives the rubber its unique properties. BCDMS is preferred over other crosslinking agents, such as tetramethyltetravinylcyclotetrasiloxane (TMVCT) and methylvinylsiloxane-dimethylsiloxane copolymer (MVQ), due to its high reactivity, low volatility, and low toxicity.

BCDMS is also used in the synthesis of other silicon-containing compounds, such as silanes, siloxanes, and silicones. It can be used as a starting material for the preparation of bifunctional silanes, which have applications in adhesives, coatings, and sealants. BCDMS can also be used as a co-monomer in the production of silicone elastomers, resins, and fluids.

Manufacturing of BCDMS

BCDMS is manufactured by the reaction of hexamethyldisiloxane (HMDS) with allyl chloride in the presence of a catalyst, such as copper(I) chloride. The reaction proceeds via a substitution mechanism, where the chlorine atoms of allyl chloride are replaced by methyl groups from HMDS. The resulting product is then purified by distillation or chromatography.

INNO Specialty Chemicals is a leading manufacturer and supplier of BCDMS in China. The company has a state-of-the-art production facility and strict quality control procedures to ensure the purity and consistency of its products. INNO's BCDMS is widely used in the silicone rubber industry and has gained a reputation for its high quality and reliability.

Conclusion

1,3-Bis(3-chloropropyl)-1,1,3,3-tetramethyldisiloxane is a crucial ingredient in silicone rubber manufacturing. It serves as a crosslinking agent that gives the rubber its unique properties, such as high temperature resistance, chemical stability, and durability. BCDMS is also used in the production of other silicon-containing compounds and has various applications in adhesives, coatings, and sealants. INNO Specialty Chemicals is a trusted supplier of BCDMS, and its high-quality products have made it a leader in the industry.

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