GB586188A - Improvements in cyclic polymers of dimethyl silanone and in methods of preparing the same - Google Patents
Improvements in cyclic polymers of dimethyl silanone and in methods of preparing the sameInfo
- Publication number
- GB586188A GB586188A GB17943/43A GB1794343A GB586188A GB 586188 A GB586188 A GB 586188A GB 17943/43 A GB17943/43 A GB 17943/43A GB 1794343 A GB1794343 A GB 1794343A GB 586188 A GB586188 A GB 586188A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- products
- polymers
- dimethyl
- silanone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- SEUDSDUUJXTXSV-UHFFFAOYSA-N dimethyl(oxo)silane Chemical compound C[Si](C)=O SEUDSDUUJXTXSV-UHFFFAOYSA-N 0.000 title abstract 2
- 229920005565 cyclic polymer Polymers 0.000 title 1
- 238000009835 boiling Methods 0.000 abstract 4
- 229920000642 polymer Polymers 0.000 abstract 4
- 230000007062 hydrolysis Effects 0.000 abstract 3
- 238000006460 hydrolysis reaction Methods 0.000 abstract 3
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 abstract 1
- JZZIHCLFHIXETF-UHFFFAOYSA-N dimethylsilicon Chemical compound C[Si]C JZZIHCLFHIXETF-UHFFFAOYSA-N 0.000 abstract 1
- 238000004821 distillation Methods 0.000 abstract 1
- 238000004508 fractional distillation Methods 0.000 abstract 1
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 239000000314 lubricant Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000013638 trimer Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/21—Cyclic compounds having at least one ring containing silicon, but no carbon in the ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/06—Preparatory processes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
Abstract
Polymers of dimethyl silanone having the formula [(CH3)2SiO]x, where x is at least 3 and is not more than 10 are prepared by hydrolysing a dimethyl silicon dihalide, separating the hydrolysis products from the hydrolysis medium and separating from the hydrolysis products any products which distil over at temperatures below 160 DEG C. at 20 mms. pressure. The remaining high boiling fraction which is substantially non-volatile at 200 DEG C. at 1 mm. pressure is subjected to a temperature of between 350-450 DEG C. at 760 mms. pressure to convert the high boiling polymers to low boiling polymers of the formula given above. The material so obtained is specially suitable for use as a high temperature lubricant as is described in Specification 586,189. In an example, dimethyldichlorosilane is slowly added to water at a low temperature, the oily product separated and fractionally distilled. A series of polymers from the trimer to the hexamer are separated. The residue from the fractional distillation which was substantially non-volatile at 200 DEG C. and 1 mm. pressure was heated up to 350 DEG C. at ordinary pressure and an inert gas passed through the apparatus. The products thus obtained were again fractionally distilled to separate the low-boiling distillation products which had been formed. Specification 542,655 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US586188XA | 1942-10-29 | 1942-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB586188A true GB586188A (en) | 1947-03-11 |
Family
ID=22017921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17943/43A Expired GB586188A (en) | 1942-10-29 | 1943-10-29 | Improvements in cyclic polymers of dimethyl silanone and in methods of preparing the same |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE470802A (en) |
| FR (1) | FR950305A (en) |
| GB (1) | GB586188A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4895967A (en) * | 1988-09-26 | 1990-01-23 | General Electric Company | Method for making cyclic poly(siloxane)s |
| US5189193A (en) * | 1992-08-31 | 1993-02-23 | Dow Corning Corporation | Process for preparation of cyclic organohydrosiloxanes |
-
0
- BE BE470802D patent/BE470802A/xx unknown
-
1943
- 1943-10-29 GB GB17943/43A patent/GB586188A/en not_active Expired
-
1946
- 1946-10-22 FR FR950305D patent/FR950305A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE470802A (en) | |
| FR950305A (en) | 1949-09-23 |
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