GB800554A - Improvements in or relating to elastomers and additives therefor - Google Patents

Improvements in or relating to elastomers and additives therefor

Info

Publication number
GB800554A
GB800554A GB29697/55A GB2969755A GB800554A GB 800554 A GB800554 A GB 800554A GB 29697/55 A GB29697/55 A GB 29697/55A GB 2969755 A GB2969755 A GB 2969755A GB 800554 A GB800554 A GB 800554A
Authority
GB
United Kingdom
Prior art keywords
pinacol
dimethyl
silane
carbon atoms
gum
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
GB29697/55A
Inventor
Robert Arthur Hall
Norman New
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB29697/55A priority Critical patent/GB800554A/en
Publication of GB800554A publication Critical patent/GB800554A/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
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-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
    • C08G77/04—Polysiloxanes
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
    • C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
    • 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
    • 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)
  • Paints Or Removers (AREA)

Abstract

The invention comprises silyl ethers produced by reacting a dihydric alcohol of the formula: R1R2C(OH)C(OH)R3R4 where R1 and R3 are hydrogen or an alkyl group of not more than 6 carbon atoms or an aryl group of 6 carbon atoms and R2 and R4 are alkyl groups of not more than 3 carbon atoms and a silane of the formula: RaR1bR11cSiX4-a-b-c where R, R1 and R11 are alkyl, alkenyl or aryl groups of not more than 12 carbon atoms, a, b and c are 0, 1, 2 or 3, a + b + c equals 2 or 3 and X is a halogen or an alkoxy group derived from an alcohol of lower boiling point than the dihydric alcohol. The invention also comprises silicone gums compounded with 20 to 55 parts of a silica having a particle size not greater than 25 millimicrons and a specific surface of at least 150 square metres per gram per 100 parts of gum and 1 to 10 per cent of the compounded gum of one of the above compounds as an additive to render the composition workable after appreciable lengths of time. The preparation of the additive may be effected in an organic solvent, e.g. benzene dioxane, and preferably in the presence of a hydrogen halide acceptor, e.g. pyridine or triethylamine. The examples describe the preparation of (1) (tetramethyl ethylene dioxy) dimethyl silane from Me2SiCl2 and pinacol; (2) (tetramethyl ethylene dioxy) diethyl silane from Et2SiCl2 and pinacol; (3) (tetramethyl ethylene dioxy) methyl phenyl silane from MePhSiCl2 and pinacol; (4) pinacol bis-trimethyl silyl ether from Me3SiCl and pinacol; (5) pinacol mono-trimethyl sibyl ether using less Me3SiCl; (6) (1,2-dimethyl-1,2-diethylethylene dioxy) dimethyl silane from Me2SiCl2 and 3,4-dimethyl hexan-3,4-diol. These compounds are mixed with a dimethyl polysiloxane gum having a Me/Si ratio of 2 : 1 and a viscosity of 1.7 X 107 centistokes at 20 DEG C., together with a silica known under the Registered Trade Mark "Aerosil" and a benzoyl peroxide/polysiloxane oil paste, and tests are carried out after curing. Specification 791,169 is referred to.
GB29697/55A 1955-10-18 1955-10-18 Improvements in or relating to elastomers and additives therefor Expired GB800554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB29697/55A GB800554A (en) 1955-10-18 1955-10-18 Improvements in or relating to elastomers and additives therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29697/55A GB800554A (en) 1955-10-18 1955-10-18 Improvements in or relating to elastomers and additives therefor

Publications (1)

Publication Number Publication Date
GB800554A true GB800554A (en) 1958-08-27

Family

ID=10295672

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29697/55A Expired GB800554A (en) 1955-10-18 1955-10-18 Improvements in or relating to elastomers and additives therefor

Country Status (1)

Country Link
GB (1) GB800554A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328340A (en) * 1963-09-09 1967-06-27 Gen Electric Organopolysiloxane composition of reduced structure
DE1669965B1 (en) * 1966-06-23 1971-03-04 Dow Corning MOLECULE ENLARGEMENT INHIBITORS IN HARDLABLE MIXTURES OF ORGANOSILICY COMPOUNDS
US4230611A (en) * 1977-12-28 1980-10-28 General Electric Company Silane plasticized polycarbonate composition

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328340A (en) * 1963-09-09 1967-06-27 Gen Electric Organopolysiloxane composition of reduced structure
DE1669965B1 (en) * 1966-06-23 1971-03-04 Dow Corning MOLECULE ENLARGEMENT INHIBITORS IN HARDLABLE MIXTURES OF ORGANOSILICY COMPOUNDS
US4230611A (en) * 1977-12-28 1980-10-28 General Electric Company Silane plasticized polycarbonate composition

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