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ChemicalBook--->CAS DataBase List--->63148-53-8

63148-53-8

63148-53-8 Structure

63148-53-8 Structure
IdentificationBack Directory
[Name]

Polysiloxanes
[CAS]

63148-53-8
[Synonyms]

OV-225
Silicones
POLYSILOXANES
SILICONE FLUID
EMALEX MTS-30E
Silicone oil Ⅰ
Silicone resins
SILICONE OIL AR 200
Polyorganosiloxanes
Dowcorning710silicone
SILICONE FLUID DC 550
SILICONE DC 550 FLUID
Siloxanes and Silicones
POLYPHENYLMETHYLSILOXANE
POLYMETHYLPHENYLSILOXANE
METHYLPHENYL POLYSILOXANE
hightemperaturesiliconefluid
DOW CORNING 550 SILICONE FLUID
DOW CORNING 710 SILICONE FLUID
POLYPHENYLMETHYLDIMETHYLSILOXANE
SILOXANE, POLYSILOXANES, SILICONES
TAINFUCHEM: POLYPHENYLMETHYLDIMETHYLSILOXANE
[MDL Number]

MFCD00146731
Chemical PropertiesBack Directory
[density ]

0.91
[refractive index ]

1.443
[Fp ]

204 °C
[form ]

Liquid
[Dielectric constant]

2.2(Ambient)
[EPA Substance Registry System]

Siloxanes and Silicones (63148-53-8)
Safety DataBack Directory
[Symbol(GHS) ]


GHS07
[Signal word ]

Warning
[Hazard statements ]

H315-H335-H319
[Precautionary statements ]

P264-P280-P305+P351+P338-P337+P313P-P264-P280-P302+P352-P321-P332+P313-P362
Hazard InformationBack Directory
[Uses]

Silicone resins are normally supplied for use as solutions, prepared as described above. The final conversion of the partially polymerized soluble material into a fully cross-linked product is carried out in situ. In the crosslinking process, remaining silanol groups are condensed by heating in the presence of a catalyst, e.g. zinc octo ate, cobalt naphthenate or triethanolamine.
[Preparation]

Silicone resins consist of branched polymers, production of which is based on the hydrolysis of trichlorosilanes. If pure trichlorosilanes are hydrolysed, the products are highly cross-linked and intractable and are unsuitable for normal applications. In order to reduce the degree of cross-linking, it is usual to subject a blend of tri- and dichlorosilanes to hydrolysis. A convenient measure of the functionality of a blend is given by the R/Si value, which is the ratio of the numbers of organic groups and silicon atoms. (Thus pure dimethyldichlorosilane and methyltrichlorosilane have R/Si values of 2 and 1 respectively.)For the preparation of commercial resins, R/Si values in the range 1.2-1.6 are usual. Most commercial silicone resins contain both methyland phenyl groups. The introduction of phenyl groups into the methylsiloxane network results in improved heat resistance, flexibility and compatibility with pigments although pure phenyl silicone resins give products which are too weak for most applications. In methyl phenyl resins, the methyl and phenyl groups may be attached to either the same or different silicon atoms.
[Pharmaceutical Applications]

Silicones are inert synthetic polymers with a wide range of uses including as sealants, cookware, adhesives and medical applications. Silicones contain next to silicon atoms also carbon, hydrogen and oxygen atoms. Silicones (oligo and polysiloxanes) are the most widely used class of silicon-based compounds clinically. Silicones can be found in plastics, lubricants, catheters, implants and a variety of other medically used items. Silicone fluids, such as simethicone, are known for their antifoaming properties.
[Solubility in organics]

Insoluble in water
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