GB685173A - A process for the manufacture of alkoxy siloxanes - Google Patents
A process for the manufacture of alkoxy siloxanesInfo
- Publication number
- GB685173A GB685173A GB28577/50A GB2857750A GB685173A GB 685173 A GB685173 A GB 685173A GB 28577/50 A GB28577/50 A GB 28577/50A GB 2857750 A GB2857750 A GB 2857750A GB 685173 A GB685173 A GB 685173A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silanes
- mixture
- chlorosilane
- phenyltrichloro
- isopropanol
- 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
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Silicon Polymers (AREA)
Abstract
Alkoxy-polysiloxanes are made by reacting one or more chlorosilanes of the general formula RnSiCl4-n, wherein R is a saturated aliphatic hydrocarbon radical containing less than 7 carbon atoms or a monocyclic aryl radical, and n has a value from 0.9 to 2.1, with a primary or secondary saturated monohydroxy alcohol in amount of 5 to 90 mol. per cent per gram atom of silicon-bonded chlorine in the chlorosilane, and hydrolysing the alkoxylated chlorosilane or chlorosilane mixture so formed by reacting it with water in amount at least sufficient to hydrolyse all the chlorine atoms but in not more than 10 per cent excess of such amount. Silanes specified are those in which R is methyl, ethyl, propyl, butyl, cyclohexyl, cyclopentyl, phenyl, chlorophenyl, tolyl or xylol, and mixtures of SiCl4, RSiCl3, R2SiCl2 and R3SiCl. Alcohols specified are methyl, ethyl, isopropyl, secondary butyl, n-butyl, n-amyl, n-stearyl, cyclohexyl and cyclopentyl alcohols. The reactions are usually effected at 20-30 DEG C. and may be executed in a solvent inert to the chlorosilane(s), e.g. toluene, xylene, benzene, petroleum ether, ether, and tertiary amines. After addition of water, the reactants are preferably heated under reflux, any volatile matter being removed. If desired, any residual acidity may be removed from the products by treatment with sodium bicarbonate. In examples, alkoxy-polysiloxanes are obtained by hydrolysis of reaction products of (1) isopropanol with a mixture of phenyltrichloro- and dimethyldichloro-silanes; (2, 3) isopropanol with a mixture of phenylmethyldichloro-, phenyltrichloro- and methyltrichloro-silanes; (4, 5) isopropanol with a mixture of phenylmethyldichloro- and phenyltrichloro-silanes; and (6) ethanol with a mixture of dibutyldichloro - and chlorophenyltrichloro - silanes. The products find use as intermediates in the preparation of siloxane resins.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US685173XA | 1950-01-07 | 1950-01-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB685173A true GB685173A (en) | 1952-12-31 |
Family
ID=22083078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28577/50A Expired GB685173A (en) | 1950-01-07 | 1950-11-22 | A process for the manufacture of alkoxy siloxanes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB685173A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0770653A2 (en) | 1995-10-26 | 1997-05-02 | Wacker-Chemie GmbH | Polisher containing fluorosilicones |
US6319982B1 (en) * | 1998-09-08 | 2001-11-20 | Ck Witco Corporation | Waterborne silicone adhesives, sealants and coatings |
-
1950
- 1950-11-22 GB GB28577/50A patent/GB685173A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0770653A2 (en) | 1995-10-26 | 1997-05-02 | Wacker-Chemie GmbH | Polisher containing fluorosilicones |
US5705592A (en) * | 1995-10-26 | 1998-01-06 | Wacker-Chemie Gmbh | Fluorosiloxane-containing care compositions |
US6319982B1 (en) * | 1998-09-08 | 2001-11-20 | Ck Witco Corporation | Waterborne silicone adhesives, sealants and coatings |
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