FR2004472A1 - Promoter for alkali metal-catalysed polymerisation of - Google Patents

Promoter for alkali metal-catalysed polymerisation of

Info

Publication number
FR2004472A1
FR2004472A1 FR6908494A FR6908494A FR2004472A1 FR 2004472 A1 FR2004472 A1 FR 2004472A1 FR 6908494 A FR6908494 A FR 6908494A FR 6908494 A FR6908494 A FR 6908494A FR 2004472 A1 FR2004472 A1 FR 2004472A1
Authority
FR
France
Prior art keywords
alkali metal
promoter
cycloorganosiloxane
atoms
parts
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.)
Withdrawn
Application number
FR6908494A
Other languages
French (fr)
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 FR2004472A1 publication Critical patent/FR2004472A1/en
Withdrawn legal-status Critical Current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

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

Diorganosiloxane rubbers are produced by the polymerisation of cycloorganosiloxane of formula (-SiRR1-O-)a (where R and R1 are monovalent hydrocarbon or halogenated hydrocarbon groups containing up to 10 C atoms, or cyanoalkyl groups containing up to 4 C atoms, andis a 3 to 6) using an alkali metal, alkali metal hydroxide, alkali metal silanolate, alkali metal siloxanolate or alkali metal hydrocarbon compound as catalyst, and in the presence of 0.05 - 100 vol. parts tetramethyldialkyl phosphoramide or hexamethyldialkyl pyrophosphoramide per 100 parts of the cycloorganosiloxane.
FR6908494A 1968-03-21 1969-03-21 Promoter for alkali metal-catalysed polymerisation of Withdrawn FR2004472A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71480668A 1968-03-21 1968-03-21

Publications (1)

Publication Number Publication Date
FR2004472A1 true FR2004472A1 (en) 1969-11-21

Family

ID=24871536

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6908494A Withdrawn FR2004472A1 (en) 1968-03-21 1969-03-21 Promoter for alkali metal-catalysed polymerisation of

Country Status (2)

Country Link
DE (1) DE1913941A1 (en)
FR (1) FR2004472A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1551775A (en) * 1975-05-05 1979-08-30 Gen Electric Process for producting diorganopolysioxane oils
GB1543596A (en) * 1975-05-05 1979-04-04 Gen Electric Diorganopolysiloxane copolymers and process for the preparation thereof
GB1549344A (en) * 1975-05-19 1979-08-08 Gen Electric Process for producing silanol end-stopped diorganopolysiloxane oils
DE3612096A1 (en) * 1986-04-10 1987-10-22 Ver Papierwarenfab Gmbh Process and device for correcting the movement direction of a web-shaped material

Also Published As

Publication number Publication date
DE1913941A1 (en) 1969-10-09

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Legal Events

Date Code Title Description
ST Notification of lapse