GB1325654A - Process for the manufacture of mixtures of linear highpolymeric organosiloxanes with fillers - Google Patents
Process for the manufacture of mixtures of linear highpolymeric organosiloxanes with fillersInfo
- Publication number
- GB1325654A GB1325654A GB1503072A GB1503072A GB1325654A GB 1325654 A GB1325654 A GB 1325654A GB 1503072 A GB1503072 A GB 1503072A GB 1503072 A GB1503072 A GB 1503072A GB 1325654 A GB1325654 A GB 1325654A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- polysiloxanes
- linear
- neutralize
- sio
- 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
- C08G77/06—Preparatory processes
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
1325654 Equilibrating polysiloxanes BAYER AG 30 March 1972 [3 April 1971] 15030/72 Heading C3T Linear polysiloxanes are obtained by equilibration of cyclic polysiloxanes [RR<SP>1</SP>SiO] n , wherein R is a hydrocarbon or halohydrocarbon radical, R<SP>1</SP> is H or a hydrocarbon or halohydrocarbon radical and n is 3 or more, optionally with a siloxane R[RR<SP>1</SP>SiO] m SiR 2 R<SP>1</SP>, wherein m is 1 or more, below 50‹ C. in the presence of an anhydrous perfluoroalkane sulphonic acid in amount at least 0À05 wt. per cent of the total siloxane. An acidic or neutral filler may be added before, during, or after the polymerization. In the example octamethyl cyclotetrasiloxane with a trace of hexamethyldisiloxane is stirred at room temperature with perfluoro n butane sulphonic acid while pyrogenic silica of 130 m.<SP>2</SP>/g. specific surface area is slowly added; the product is kneaded with hexamethyldisilazane to neutralize the acid. In alternative procedures the silica is omitted, the reaction is conducted at 45‹ C., trifluoromethane- or perfluorooctanesulphonic acid is used, or ZnCO 3 is used to neutralize the catalyst.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712116430 DE2116430A1 (en) | 1971-04-03 | 1971-04-03 | Process for the preparation of mixtures of linear high polymer organosiloxanes with fillers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1325654A true GB1325654A (en) | 1973-08-08 |
Family
ID=5803827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1503072A Expired GB1325654A (en) | 1971-04-03 | 1972-03-30 | Process for the manufacture of mixtures of linear highpolymeric organosiloxanes with fillers |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE781560A (en) |
DE (1) | DE2116430A1 (en) |
FR (1) | FR2132365B1 (en) |
GB (1) | GB1325654A (en) |
NL (1) | NL7204370A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0021683A1 (en) * | 1979-06-25 | 1981-01-07 | Union Carbide Corporation | Siloxane bond rearrangement effected by solid perfluorinated polymers containing pendant sulfonic acid groups |
US4431771A (en) * | 1983-03-14 | 1984-02-14 | Dow Corning Corporation | Polymerization of silicone polymer-filler mixtures as powders |
US4448927A (en) * | 1983-03-14 | 1984-05-15 | Dow Corning Corporation | Method of polymerizing oligomers of polydiorganosiloxane in the presence of filler |
US4482670A (en) * | 1983-03-14 | 1984-11-13 | Dow Corning Corporation | Method of polymerizing polydiorganosiloxane fluid-filler mixture using sulfuric or sulfonic acids |
US4508887A (en) * | 1983-08-01 | 1985-04-02 | Dow Corning Corporation | Method and novel catalyst compositions for preparing polyorganosiloxanes |
GB2145727A (en) * | 1983-08-29 | 1985-04-03 | Gen Electric | Method for making cyclopolydimethylsiloxanes |
US4525470A (en) * | 1983-08-01 | 1985-06-25 | Dow Corning Corporation | Catalyst compositions for preparing polyorganosiloxanes |
EP0205964A2 (en) * | 1985-05-28 | 1986-12-30 | Toray Silicone Company Limited | Method for producing a silicone polymer-filler mixture |
FR2614028A1 (en) * | 1987-04-16 | 1988-10-21 | Rhone Poulenc Chimie | PROCESS FOR THE PREPARATION OF POLYDIORGANOSILOXANE WITH SILANOL EXTREMITES |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4049861A (en) * | 1975-03-07 | 1977-09-20 | Minnesota Mining And Manufacturing Company | Abrasion resistant coatings |
-
1971
- 1971-04-03 DE DE19712116430 patent/DE2116430A1/en active Pending
-
1972
- 1972-03-30 GB GB1503072A patent/GB1325654A/en not_active Expired
- 1972-03-30 NL NL7204370A patent/NL7204370A/xx unknown
- 1972-03-31 FR FR7211598A patent/FR2132365B1/fr not_active Expired
- 1972-03-31 BE BE781560A patent/BE781560A/en unknown
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0021683A1 (en) * | 1979-06-25 | 1981-01-07 | Union Carbide Corporation | Siloxane bond rearrangement effected by solid perfluorinated polymers containing pendant sulfonic acid groups |
US4431771A (en) * | 1983-03-14 | 1984-02-14 | Dow Corning Corporation | Polymerization of silicone polymer-filler mixtures as powders |
US4448927A (en) * | 1983-03-14 | 1984-05-15 | Dow Corning Corporation | Method of polymerizing oligomers of polydiorganosiloxane in the presence of filler |
EP0119817A2 (en) * | 1983-03-14 | 1984-09-26 | Dow Corning Corporation | Polymerization of silicone polymer-filler mixtures as powders |
EP0120645A2 (en) * | 1983-03-14 | 1984-10-03 | Dow Corning Corporation | Method of polymerizing oligomers of polydiorganosiloxane in the presence of filler |
US4482670A (en) * | 1983-03-14 | 1984-11-13 | Dow Corning Corporation | Method of polymerizing polydiorganosiloxane fluid-filler mixture using sulfuric or sulfonic acids |
EP0119817A3 (en) * | 1983-03-14 | 1986-03-26 | Dow Corning Corporation | Polymerization of silicone polymer-filler mixtures as powders |
EP0120645A3 (en) * | 1983-03-14 | 1986-03-05 | Dow Corning Corporation | Method of polymerizing oligomers of polydiorganosiloxane in the presence of filler |
US4525470A (en) * | 1983-08-01 | 1985-06-25 | Dow Corning Corporation | Catalyst compositions for preparing polyorganosiloxanes |
US4508887A (en) * | 1983-08-01 | 1985-04-02 | Dow Corning Corporation | Method and novel catalyst compositions for preparing polyorganosiloxanes |
GB2145727A (en) * | 1983-08-29 | 1985-04-03 | Gen Electric | Method for making cyclopolydimethylsiloxanes |
EP0205964A2 (en) * | 1985-05-28 | 1986-12-30 | Toray Silicone Company Limited | Method for producing a silicone polymer-filler mixture |
US4696970A (en) * | 1985-05-28 | 1987-09-29 | Toray Silicone Company, Ltd. | Method for producing a silicone polymer-filler mixture |
EP0205964A3 (en) * | 1985-05-28 | 1989-11-23 | Toray Silicone Company Limited | Method for producing a silicone polymer-filler mixture |
FR2614028A1 (en) * | 1987-04-16 | 1988-10-21 | Rhone Poulenc Chimie | PROCESS FOR THE PREPARATION OF POLYDIORGANOSILOXANE WITH SILANOL EXTREMITES |
EP0292407A1 (en) * | 1987-04-16 | 1988-11-23 | Rhone-Poulenc Chimie | Process for preparing polydiorganosiloxanes with silanol endgroups |
Also Published As
Publication number | Publication date |
---|---|
FR2132365B1 (en) | 1978-05-12 |
DE2116430A1 (en) | 1972-10-12 |
FR2132365A1 (en) | 1972-11-17 |
NL7204370A (en) | 1972-10-05 |
BE781560A (en) | 1972-10-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |