GB755762A - Improvements relating to organo polysiloxane rubber compositions - Google Patents

Improvements relating to organo polysiloxane rubber compositions

Info

Publication number
GB755762A
GB755762A GB9798/54A GB979854A GB755762A GB 755762 A GB755762 A GB 755762A GB 9798/54 A GB9798/54 A GB 9798/54A GB 979854 A GB979854 A GB 979854A GB 755762 A GB755762 A GB 755762A
Authority
GB
United Kingdom
Prior art keywords
compositions
siloxane
milling
cured
extrusion
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
GB9798/54A
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 GB755762A publication Critical patent/GB755762A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
    • 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
    • C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
    • C08G77/24—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen halogen-containing groups
    • 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
    • C08G77/70—Siloxanes defined by use of the MDTQ nomenclature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/18—Homopolymers or copolymers or tetrafluoroethene
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

A composition, for making silicone rubber having improved tear strength, comprises an organopolysiloxane convertible by heat to the solid, elastic state, and a minor amount, preferably less than 25 per cent by weight of the siloxane, of a solid polytetrafluoroethylene dispersed throughout the siloxane in the form of randomly distributed fibres. Other ingredients specified are fillers, e.g. silica aerogel, g -alumina, titania, lithopone, calcium carbonate, carbon and talc, and curing agents, e.g. benzoyl peroxide, t-butyl perbenzoate, zirconyl nitrate and boron hydrides. The compositions may be made by milling mixtures of the ingredients on differential rolls or by extrusion in a machine employing a worm gear which imparts a shearing action on the P.T.F.E. The P.T.F.E. is used in the dry state or in the form of an aqueous dispersion, shearing deformation by the milling or extrusion causing it to be drawn into fibres. The compositions may be moulded, extruded, knife coated, used for dipping purposes (by using solvents, e.g. toluene and xylene) and may then be cured, e.g. at 125-200 DEG C. The cured compositions may be used as insulation for electrical conductors, as gasket materials, shock absorbers and valve seats. Examples are given.
GB9798/54A 1953-04-03 1954-04-02 Improvements relating to organo polysiloxane rubber compositions Expired GB755762A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US755762XA 1953-04-03 1953-04-03

Publications (1)

Publication Number Publication Date
GB755762A true GB755762A (en) 1956-08-29

Family

ID=22126662

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9798/54A Expired GB755762A (en) 1953-04-03 1954-04-02 Improvements relating to organo polysiloxane rubber compositions

Country Status (1)

Country Link
GB (1) GB755762A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1111385B (en) * 1956-06-27 1961-07-20 Dow Corning A G Process for the production of elastomers from fluorine-containing organopolysiloxanes
US3059764A (en) * 1958-04-14 1962-10-23 Minnesota Mining & Mfg Silicone tape
US4488771A (en) * 1982-03-08 1984-12-18 Allied Corporation Fluorosilicone elastomers, method of making such elastomers and electrical connectors including the elastomers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1111385B (en) * 1956-06-27 1961-07-20 Dow Corning A G Process for the production of elastomers from fluorine-containing organopolysiloxanes
US3059764A (en) * 1958-04-14 1962-10-23 Minnesota Mining & Mfg Silicone tape
US4488771A (en) * 1982-03-08 1984-12-18 Allied Corporation Fluorosilicone elastomers, method of making such elastomers and electrical connectors including the elastomers

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