GB1212421A - Method of manufacturing organopolysiloxane diols - Google Patents

Method of manufacturing organopolysiloxane diols

Info

Publication number
GB1212421A
GB1212421A GB1847668A GB1847668A GB1212421A GB 1212421 A GB1212421 A GB 1212421A GB 1847668 A GB1847668 A GB 1847668A GB 1847668 A GB1847668 A GB 1847668A GB 1212421 A GB1212421 A GB 1212421A
Authority
GB
United Kingdom
Prior art keywords
lioh
catalyst
water
dma
dmf
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
GB1847668A
Inventor
Kazuhisa Kawazumi
Bunjiro Murai
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co 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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Publication of GB1212421A publication Critical patent/GB1212421A/en
Expired legal-status Critical Current

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
    • C08G77/08—Preparatory processes characterised by the catalysts used
    • 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)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Silicon Polymers (AREA)

Abstract

1,212,421. Preparation of linear organopolysiloxane diols. TOKYO SHIBAURA ELECTRIC CO. Ltd. 18 April, 1968 [21 April, 1967; 14 June, 1967], No. 18476/68. Heading C3T. A linear organopolysiloxane diol is prepared by heating one or more cyclic organopolysiloxanes in the presence of a dipolar aprotic solvent and a quantity of water additional to any already present in the solvent or catalyst, and LiOH or LiOH.H 2 O as catalyst. The viscosity of the product is related to the amount of water used. Suitable solvents include dimethyl sulphoxide (DMSO), N: N-dimethyl formamide (DMF), methyl ethyl- and diethyl-formamides, and NN-dimethyl acetamide (DMA). In examples octamethyl cyclotetrasiloxane is polymerized alone or with trimethyl cyclotrisiloxane and decamethyl cyclopentasiloxane or with these and heptamethyl vinyl cyclotetrasiloxane and hexaphenyl cyclotrisiloxane in DMF, DMSO or DMA with small amounts of water, and LiOH or LiOH.H 2 O as catalyst. The products have viscosities of 4380-150,000 cS./30‹ C. One product is blended with ethyl silicate or triacetoxy methyl silane and dibutyltin dilaurate or dioctoate or tin dioctoate to give an RTV composition (curing in moist air).
GB1847668A 1967-04-21 1968-04-18 Method of manufacturing organopolysiloxane diols Expired GB1212421A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2513067 1967-04-21
JP3758667 1967-06-14

Publications (1)

Publication Number Publication Date
GB1212421A true GB1212421A (en) 1970-11-18

Family

ID=26362727

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1847668A Expired GB1212421A (en) 1967-04-21 1968-04-18 Method of manufacturing organopolysiloxane diols

Country Status (1)

Country Link
GB (1) GB1212421A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2311789A1 (en) * 1975-05-19 1976-12-17 Gen Electric PROCESS FOR MANUFACTURING SILICONE OILS WITH LOW MOLAR MASS SILANOL TERMINATIONS
EP0428958A2 (en) * 1989-11-20 1991-05-29 General Electric Company Polar aprotic catalysts for formation of fluorosilicone fluids
EP0429928A2 (en) * 1989-11-20 1991-06-05 General Electric Company Polar aprotic catalysts for formation of fluorosilicone fluids
EP0455163A2 (en) * 1990-04-28 1991-11-06 Dow Corning Toray Silicone Company, Limited Method for preparing diphenylsiloxane/dimethylsiloxane copolymers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2311789A1 (en) * 1975-05-19 1976-12-17 Gen Electric PROCESS FOR MANUFACTURING SILICONE OILS WITH LOW MOLAR MASS SILANOL TERMINATIONS
EP0428958A2 (en) * 1989-11-20 1991-05-29 General Electric Company Polar aprotic catalysts for formation of fluorosilicone fluids
EP0429928A2 (en) * 1989-11-20 1991-06-05 General Electric Company Polar aprotic catalysts for formation of fluorosilicone fluids
EP0428958A3 (en) * 1989-11-20 1991-11-21 General Electric Company Polar aprotic catalysts for formation of fluorosilicone fluids
EP0429928A3 (en) * 1989-11-20 1991-11-27 General Electric Company Polar aprotic catalysts for formation of fluorosilicone fluids
EP0455163A2 (en) * 1990-04-28 1991-11-06 Dow Corning Toray Silicone Company, Limited Method for preparing diphenylsiloxane/dimethylsiloxane copolymers
EP0455163A3 (en) * 1990-04-28 1992-04-01 Dow Corning Toray Silicone Company, Limited Method for preparing diphenylsiloxane/dimethylsiloxane copolymers

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees