GB992025A - Encapsulating organopolysiloxanes - Google Patents
Encapsulating organopolysiloxanesInfo
- Publication number
- GB992025A GB992025A GB4536061A GB4536061A GB992025A GB 992025 A GB992025 A GB 992025A GB 4536061 A GB4536061 A GB 4536061A GB 4536061 A GB4536061 A GB 4536061A GB 992025 A GB992025 A GB 992025A
- Authority
- GB
- United Kingdom
- Prior art keywords
- copolymer
- monovalent hydrocarbon
- added
- siloxane
- amount
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/46—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes silicones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- 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
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Silicon Polymers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A substantially solventless siloxane encapsulating liquid is made by (A) forming a homogeneous mixture of (1) an organic solvent solution of a resinous copolymer of R3SiO0.5 and SiO2 units wherein R is a monovalent hydrocarbon (saturated or unsaturated) radical, the copolymer containing an average of from 0.3 to 0.8 R3SiO0.5 units per SiO2 unit, and (2) a liquid silanol-terminated diorganopolysiloxane having a viscosity of from 100 to 4000 cp. at 25 DEG C. and in which the organic radicals are monovalent hydrocarbon radicals, and (B) heating the mixture at an elevated temperature to remove the organic solvent. Solvents specified are aliphatic and aromatic mineral spirits, benzene, toluene, xylene and trichloroethylene. Preferably siloxane (2) is used in amount of 1 to 10 pts. (by wt.) per pt. of copolymer (1). The critical step is the removal of the solvent which is preferably effected below 100 DEG C. under reduced pressure. If desired, conventional siloxanes may be added in amount up to 50% by wt. of the encapsulating liquid, and fillers, e.g. silica (aerogel, fume and precipitated), diatomaceous earth and calcium carbonate, may also be added. The liquids can be cured in situ with either acidic or basic catalysts, e.g. the acetates, octoates, butyrates or naphthenates of Pb, Sn, Zn, Co, Fe, Cr or Mn, tetramethyl- and benzyltrimethylammonium hydroxides, tetrabutyl-phosphonium hydroxide, and the complex system comprising an amine and an epoxy-containing organic compound described in Specification 992,026. Examples are given.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7955560A | 1960-12-30 | 1960-12-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB992025A true GB992025A (en) | 1965-05-12 |
Family
ID=22151279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4536061A Expired GB992025A (en) | 1960-12-30 | 1961-12-18 | Encapsulating organopolysiloxanes |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1244401B (en) |
FR (1) | FR1320767A (en) |
GB (1) | GB992025A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1981000232A1 (en) * | 1979-07-16 | 1981-02-05 | Gen Electric | Organopolysiloxane-silica mixture for treatment of gypsum paper |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4489127A (en) * | 1983-07-13 | 1984-12-18 | Dow Corning Corporation | Flexible silicone resin coated fabric |
US4785041A (en) * | 1987-12-31 | 1988-11-15 | Dow Corning Corporation | Screen printable organosiloxane resin coating compositions |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE909995C (en) * | 1950-10-12 | 1954-04-26 | Dow Corning | Process for the production of siloxane elastomers |
DE1008912B (en) * | 1952-10-22 | 1957-05-23 | Westinghouse Electric Corp | Process for the production of moldings and coatings from hardened synthetic resins based on organopolysiloxanes |
DE1091161B (en) * | 1954-01-11 | 1960-10-20 | Dow Corning | Use of organopolysiloxane resins as an insulating compound for electrical devices |
NL238741A (en) * | 1958-04-30 | 1900-01-01 |
-
1961
- 1961-12-18 GB GB4536061A patent/GB992025A/en not_active Expired
- 1961-12-28 DE DE1961G0033918 patent/DE1244401B/en active Pending
- 1961-12-29 FR FR883440A patent/FR1320767A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1981000232A1 (en) * | 1979-07-16 | 1981-02-05 | Gen Electric | Organopolysiloxane-silica mixture for treatment of gypsum paper |
Also Published As
Publication number | Publication date |
---|---|
DE1244401B (en) | 1967-07-13 |
FR1320767A (en) | 1963-03-15 |
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