GB992025A - Encapsulating organopolysiloxanes - Google Patents

Encapsulating organopolysiloxanes

Info

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
Application number
GB4536061A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB992025A publication Critical patent/GB992025A/en
Expired legal-status Critical Current

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.
GB4536061A 1960-12-30 1961-12-18 Encapsulating organopolysiloxanes Expired GB992025A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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