Nanjing SiSiB Silicones Co., Ltd.
Nanjing SiSiB Silicones Co., Ltd.
SiSiB® PC5220
SiSiB® PC5220

Dimethyldichlorosilane

SiSiB® PC5130, SiSiB® PC5220 and SiSiB® PC5310 are formed by reaction of metallic silicon or ferrosilicon with hydrogen chloride or chlorine. SiSiB® PC5220 is a colorless clear liquid.


SiSiB® PC5220

Technical Data


CAS No.

75-78-5

EINECS No.

200-901-0

Formula

C2H6Cl2Si

Molecular Weight

129.06

Boiling Point

70°C [760mmHg]

Flash Point

-7°C



Color and Appearance

Colorless clear liquid

Density 25/25°C

1.07

Refractive Index

1.4022 [25°C]

Min. Purity

99.8%



Application


  • Methyl chlorosilanes have one to three methyl groups. In the case of SiSiB® PC5220 dimethyldichlorosilane, dichlorodimethylsilane, two chlorine atoms are available, so that a reaction with excess water produces a linear chain of ether-like linkages between silicon atoms.


    As in polyethers, these flexible linkages produce a rubbery polymer, polydimethylsiloxane (PDMS). Trimethylchlorosilane (SiSiB® PC5310) can be used to induce branching and cross-linking in PDMS molecules, while chlorotrimethylsilane serves to end backbone chains, limiting molecular weight.


Packing and Storag



  • In the unopened original container SiSiB® PC5220 dimethyldichlorosilane has a shelf life of one year in a dry and cool place.




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SiSiB® PC5220