GB848311A - A process for polymerising siloxanes - Google Patents
A process for polymerising siloxanesInfo
- Publication number
- GB848311A GB848311A GB6981/59A GB698159A GB848311A GB 848311 A GB848311 A GB 848311A GB 6981/59 A GB6981/59 A GB 6981/59A GB 698159 A GB698159 A GB 698159A GB 848311 A GB848311 A GB 848311A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymers
- products
- siloxane
- produce
- silane
- 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
Abstract
A siloxane of the formula <FORM:0848311/IV(a)/1> is polymerized by interaction in the absence of moisture with a silane of the formula R1mSiX4-m in such an amount that during at least the latter portion of the reaction the ratio of X groups to Si OH is not greater than 1, wherein in said siloxane and silane each R and R1 is a monovalent hydrocarbon or halogenated hydrocarbon radical, X is a halogen atom, n is at least 150 and m is 1, 2 or 3. R and R1 may be alkyl, alkenyl, cyclo-aliphatic, aralkyl, aryl or halogenated aliphatic or aromatic hydrocarbon radicals. The reaction, which occurs upon mixing the two reactants, is preferably carried out at a temperature below 50 DEG C. The products can be freed from Si-bonded halogen and from any residual hydrogen halide as by washing or by neutralisation with alkali. The products may be homo- or co-polymers. Trifunctional silanes act as cross-linking agents to produce three dimensional polymers, and can thus be used to cure diorganosiloxanes ; difunctional silanes produce linear halogen-terminated polymers ; and monofunctional silanes produce triorganosilyl endblocked polymers. Examples are given. Uses : the products are useful in making siloxane elastomers, or where end-blocked with triorganosilyl groups can be used per se as stable liquids.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US848311XA | 1958-04-09 | 1958-04-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB848311A true GB848311A (en) | 1960-09-14 |
Family
ID=22187482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6981/59A Expired GB848311A (en) | 1958-04-09 | 1959-02-27 | A process for polymerising siloxanes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB848311A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3303163A (en) * | 1967-02-07 | Room temperature vulcanizing silicone compositions | ||
| US3328481A (en) * | 1964-04-20 | 1967-06-27 | Dow Corning | Organosilicon resins |
| FR2469422A1 (en) * | 1979-11-09 | 1981-05-22 | Gen Electric | PROCESS FOR THE PREPARATION OF FLUOROSILICONE POLYMERS |
| US4478911A (en) * | 1976-07-28 | 1984-10-23 | National Research Development Corporation | Stone treatment |
-
1959
- 1959-02-27 GB GB6981/59A patent/GB848311A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3303163A (en) * | 1967-02-07 | Room temperature vulcanizing silicone compositions | ||
| US3328481A (en) * | 1964-04-20 | 1967-06-27 | Dow Corning | Organosilicon resins |
| US4478911A (en) * | 1976-07-28 | 1984-10-23 | National Research Development Corporation | Stone treatment |
| FR2469422A1 (en) * | 1979-11-09 | 1981-05-22 | Gen Electric | PROCESS FOR THE PREPARATION OF FLUOROSILICONE POLYMERS |
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