GB659011A - Improvements in or relating to the manufacture of cyclic ethylmethylpolysiloxanes - Google Patents
Improvements in or relating to the manufacture of cyclic ethylmethylpolysiloxanesInfo
- Publication number
- GB659011A GB659011A GB15824/49A GB1582449A GB659011A GB 659011 A GB659011 A GB 659011A GB 15824/49 A GB15824/49 A GB 15824/49A GB 1582449 A GB1582449 A GB 1582449A GB 659011 A GB659011 A GB 659011A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cyclic
- molecular weight
- low molecular
- formula
- hydrolysis
- 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
- 125000004122 cyclic group Chemical group 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 title 1
- -1 polysiloxanes Polymers 0.000 abstract 7
- 239000003921 oil Substances 0.000 abstract 3
- 229920001296 polysiloxane Polymers 0.000 abstract 3
- 239000002904 solvent Substances 0.000 abstract 3
- 239000004215 Carbon black (E152) Substances 0.000 abstract 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 abstract 2
- 229930195733 hydrocarbon Natural products 0.000 abstract 2
- 150000002430 hydrocarbons Chemical class 0.000 abstract 2
- 230000007062 hydrolysis Effects 0.000 abstract 2
- 238000006460 hydrolysis reaction Methods 0.000 abstract 2
- 239000004342 Benzoyl peroxide Substances 0.000 abstract 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 abstract 1
- 125000003545 alkoxy group Chemical group 0.000 abstract 1
- 239000010425 asbestos Substances 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 235000019400 benzoyl peroxide Nutrition 0.000 abstract 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000008199 coating composition Substances 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 229920005565 cyclic polymer Polymers 0.000 abstract 1
- 238000013016 damping Methods 0.000 abstract 1
- 238000004821 distillation Methods 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 abstract 1
- 239000000806 elastomer Substances 0.000 abstract 1
- 239000000945 filler Substances 0.000 abstract 1
- 244000144992 flock Species 0.000 abstract 1
- 239000006260 foam Substances 0.000 abstract 1
- 238000005187 foaming Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 229910052736 halogen Inorganic materials 0.000 abstract 1
- 150000002367 halogens Chemical class 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- 238000010348 incorporation Methods 0.000 abstract 1
- 239000000314 lubricant Substances 0.000 abstract 1
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 239000002685 polymerization catalyst Substances 0.000 abstract 1
- 229910052895 riebeckite Inorganic materials 0.000 abstract 1
- 150000004756 silanes Chemical class 0.000 abstract 1
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Silicon Polymers (AREA)
Abstract
Cyclic polysiloxanes of the formula (CH3 C2H5.SiO)n, where n is an integer of at least 3, by hydrolysing and condensing silanes of the formula CH3.C2H5.SiX2, which may be made as set forth in Specification 632,824, [Group IV (b)], wherein X is a hydrolysable group such as halogen or alkoxy. The hydrolysis may be effected by water, at temperatures from 0 DEG to 250 DEG C. with or without a solvent such as ether and in the presence or absence of condensation catalysts. Low molecular weight cyclic ethylmethylsiloxanes formed during the hydrolysis may be separated by distillation. The cyclic siloxanes of low molecular weight may also be made by heating in the absence of oxygen, high polymeric ethyl-methylsiloxanes to a temperature above 250 DEG C. The low molecular weight cyclic polymers may be further polymerized by contact with a polymerization catalyst, e.g. a strong acid or an alkali metal hydroxide, preferably at 50 DEG to 250 DEG C. and, if desired, in presence of a solvent. Examples are given. The cyclic polysiloxanes may be used as low temperature lubricants and damping media; to increase the viscosity and inhibit the tendency to foam of hydrocarbon oils; to make elastomers which remain flexible at low temperatures, by incorporation of fillers, e.g. metal oxides and carbonates, asbestos and glass flock, and vulcanizing agents, e.g. benzoyl peroxide and tertiary butyl perbenzoate; they may be co-polymerized with other siloxanes and the products diluted with oils or solvents to form coating compositions. Specification 659,012 also is referred to.ALSO:Cyclic polysiloxanes of the general formula (CH3.C2H5.SiO)n, where n is an integer of at least 3, are incorporated in hydrocarbon oils to inhibit foaming.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US659011XA | 1948-07-31 | 1948-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB659011A true GB659011A (en) | 1951-10-17 |
Family
ID=22065898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15824/49A Expired GB659011A (en) | 1948-07-31 | 1949-06-14 | Improvements in or relating to the manufacture of cyclic ethylmethylpolysiloxanes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB659011A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010080482A2 (en) | 2008-12-18 | 2010-07-15 | Momentive Performance Materials Inc. | Composition comprising at least two different cycloalkylmethicones and use thereof |
| WO2019031079A1 (en) * | 2017-08-10 | 2019-02-14 | 信越化学工業株式会社 | Cosmetic |
-
1949
- 1949-06-14 GB GB15824/49A patent/GB659011A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010080482A2 (en) | 2008-12-18 | 2010-07-15 | Momentive Performance Materials Inc. | Composition comprising at least two different cycloalkylmethicones and use thereof |
| US8557260B2 (en) | 2008-12-18 | 2013-10-15 | Momentive Performance Materials Inc. | Composition comprising at least two different cycloalkylmethicones and use thereof |
| WO2019031079A1 (en) * | 2017-08-10 | 2019-02-14 | 信越化学工業株式会社 | Cosmetic |
| CN111032014A (en) * | 2017-08-10 | 2020-04-17 | 信越化学工业株式会社 | Cosmetic preparation |
| US11389389B2 (en) | 2017-08-10 | 2022-07-19 | Shin-Etsu Chemical Co., Ltd. | Cosmetic |
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