Siliconerubber,methyldiphenylrtv108
Dimethyl-diphenylpolysiloxane
CAS: 68083-14-7
Molecular Formula: C6H18OSi2
Siliconerubber,methyldiphenylrtv108 - Names and Identifiers
| Name | Dimethyl-diphenylpolysiloxane |
| Synonyms | k333 ps089 sf1154 sf1153 cf1142 sf1179 polydimethyldiphenylsiloxane Dimethyl-diphenylpolysiloxane Siliconerubber,methyldiphenylrtv108 |
| CAS | 68083-14-7 |
| EINECS | 203-492-7 |
Siliconerubber,methyldiphenylrtv108 - Physico-chemical Properties
| Molecular Formula | C6H18OSi2 |
| Molar Mass | 162.380004882813 |
| Density | 1.09 g/mL at 20 °C |
| Melting Point | -50 °C |
| Boling Point | >140 °C0.002 mm Hg(lit.) |
| Flash Point | >230 °F |
| Vapor Presure | <5 mm Hg ( 25 °C) |
| Storage Condition | Room Temprature |
| Refractive Index | 0 |
| Use | Applications for sealing, bonding, molding, insulation |
Siliconerubber,methyldiphenylrtv108 - Risk and Safety
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
Siliconerubber,methyldiphenylrtv108 - Preparation Method of dimethyl diphenyl polysiloxane
from Baidu Library
Application (patent) number:
CN202010657432.5
application date:
2020-07-09
Public/Announcement Number:
CN111560119A
Public/announcement date:
2020.08.21
applicant (patent):
Weihai Xinyuan Chemical Co., Ltd.; Weihai Xinyuan New Material Co., Ltd.
inventor:
Tian Zhi Gang , Forest peak , Liu Xiaomin , Xia Jinpeng , cluster flight , Zhao Weijie , Zhou Jianmin , zouwei
National and provincial code:
CN371002
Abstract:
The present invention relates to a preparation method of dimethyldiphenylpolysiloxane, comprising the following steps: mixing octa-phenyl cyclotetrasiloxane and dimethylcyclosiloxane uniformly, and dehydrating under vacuum, after the back pressure of nitrogen, add a special compound solvent, Catalyst, capping agent and promoter, raise the temperature, carry out the first-stage polymerization reaction, and evaporate the solvent under reduced pressure after the end of the first-stage polymerization reaction, the second stage of polymerization reaction is continued at elevated temperature. After the end of the reaction, the neutralizer is added, and the low boiling rate is removed by vacuum heating to obtain dimethyl diphenyl polysiloxane. Compared with the traditional method, the invention realizes the equilibrium copolymerization between the solid-liquid two-phase by introducing a special compound solvent, and through the two-stage polymerization reaction, the phenyl siloxane chain can be evenly dispersed in the molecular chain, and the homogeneous colorless and transparent dimethyl diphenyl polysiloxane is prepared. At the same time, the process operation is simple and convenient.
Last Update：2024-01-02 23:10:35
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