GB657169A - Alkylsilsesquioxanes - Google Patents
AlkylsilsesquioxanesInfo
- Publication number
- GB657169A GB657169A GB2342/49A GB234249A GB657169A GB 657169 A GB657169 A GB 657169A GB 2342/49 A GB2342/49 A GB 2342/49A GB 234249 A GB234249 A GB 234249A GB 657169 A GB657169 A GB 657169A
- Authority
- GB
- United Kingdom
- Prior art keywords
- distillation
- carbon atoms
- formula
- alkyl radical
- hydrolysis product
- 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
- C08G77/04—Polysiloxanes
- C08G77/045—Polysiloxanes containing less than 25 silicon atoms
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
Soluble, completely condensed alkylsilsesquioxanes, having the formula (R.SiO1,5)n, where R is an alkyl radical containing 2 to 6 carbon atoms and n is an integer from 8 to 24, are made by destructive distillation of an alkylsilsesquioxane hydrolysate (i.e. the hydrolysis product of a silane having the formula R.SiX3, where R is an alkyl radical containing 2 to 6 carbon atoms and X is a readily hydrolysable group such as alkoxy or halogen atom), or by distillation above 200 DEG C., but preferably below 500 DEG C., and at a pressure below 5 mm. of a mixture of an alkali metal hydroxide and either the hydrolysis product of an alkyltrichlorosilane or an incompletely condensed alkylsilsesquioxane polymer, in which the alkyl radical contains 2 to 6 carbon atoms. The products may be separated into their components by fractional distillation or by crystallization. In examples: (1) C3H5SiC13; (2) C2H7SiC13 and (3) n-C4H9SiC13 were hydrolysed and the resulting oily-products mixed with powdered NaOH and distilled under reduced pressure to give paste-like products from which were separated by crystallization from acetone (C3H7SiO1,5)8, (C2H5SiO1,5)8 and (C4H9SiO1,5)8, respectively, the p uncrystallized material remaining in each case being a viscous oil; (4) distillation of NaOH and the hydrolysis product of C6H13SiC13 gave a mixture of polymers containing an average of 14.8 units of the formula (C6H13SiO1,5). The liquid compounds may be employed as lubricants and damping fluids. When heated to above 150 DEG C. with or without catalysts such as alkali metal hydroxide or alcoholate and organo metallic salts such as lead naphthenate, they form insoluble resinous compounds, and consequently find use in coatings, adhesives and potting compounds.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US657169XA | 1948-03-27 | 1948-03-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB657169A true GB657169A (en) | 1951-09-12 |
Family
ID=22064619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2342/49A Expired GB657169A (en) | 1948-03-27 | 1949-01-27 | Alkylsilsesquioxanes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB657169A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0290137A1 (en) * | 1987-04-13 | 1988-11-09 | Toshiba Silicone Co., Ltd. | Lubricating composition and hydraulic fluid |
-
1949
- 1949-01-27 GB GB2342/49A patent/GB657169A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0290137A1 (en) * | 1987-04-13 | 1988-11-09 | Toshiba Silicone Co., Ltd. | Lubricating composition and hydraulic fluid |
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