FR2406650A1 - PROCESS FOR PURIFYING SILICONE RESINS WITH A VIEW TO REDUCING THEIR WEIGHT LOSS UNDER PRESSURE VACUUM - Google Patents

PROCESS FOR PURIFYING SILICONE RESINS WITH A VIEW TO REDUCING THEIR WEIGHT LOSS UNDER PRESSURE VACUUM

Info

Publication number
FR2406650A1
FR2406650A1 FR7731902A FR7731902A FR2406650A1 FR 2406650 A1 FR2406650 A1 FR 2406650A1 FR 7731902 A FR7731902 A FR 7731902A FR 7731902 A FR7731902 A FR 7731902A FR 2406650 A1 FR2406650 A1 FR 2406650A1
Authority
FR
France
Prior art keywords
reducing
view
silicone resins
under pressure
weight loss
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.)
Granted
Application number
FR7731902A
Other languages
French (fr)
Other versions
FR2406650B1 (en
Inventor
Jean-Claude Guillaumon
Jacques Pierre Jean Guillin
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.)
Centre National dEtudes Spatiales CNES
Original Assignee
Centre National dEtudes Spatiales CNES
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 Centre National dEtudes Spatiales CNES filed Critical Centre National dEtudes Spatiales CNES
Priority to FR7731902A priority Critical patent/FR2406650A1/en
Priority to GB7841512A priority patent/GB2009195A/en
Priority to DE19782846305 priority patent/DE2846305C2/en
Publication of FR2406650A1 publication Critical patent/FR2406650A1/en
Application granted granted Critical
Publication of FR2406650B1 publication Critical patent/FR2406650B1/fr
Granted 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
    • C08G77/32—Post-polymerisation treatment
    • C08G77/34—Purification

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)
  • Detergent Compositions (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Extraction Or Liquid Replacement (AREA)

Abstract

L'invention se rapporte aux silicones. Elle concerne un procédé de purification de résines silicones commerciales, caractérisé en ce qu'il consiste : A. à dissoudre la résine silicone commerciale dans un solvant, B. à précipiter les chaînes longues de prépolymère par un non solvant, C. à séparer le précipité formé, et D. à évaporer ensuite le solvant et le non solvant résiduels du précipité séparé. Les résines obtenues sont utiles notamment dans des applications spatiales.The invention relates to silicones. It relates to a process for the purification of commercial silicone resins, characterized in that it consists: A. in dissolving the commercial silicone resin in a solvent, B. in precipitating the long prepolymer chains with a non-solvent, C. in separating the precipitate formed, and D. then evaporating the residual solvent and non-solvent from the separated precipitate. The resins obtained are useful in particular in space applications.

FR7731902A 1977-10-24 1977-10-24 PROCESS FOR PURIFYING SILICONE RESINS WITH A VIEW TO REDUCING THEIR WEIGHT LOSS UNDER PRESSURE VACUUM Granted FR2406650A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7731902A FR2406650A1 (en) 1977-10-24 1977-10-24 PROCESS FOR PURIFYING SILICONE RESINS WITH A VIEW TO REDUCING THEIR WEIGHT LOSS UNDER PRESSURE VACUUM
GB7841512A GB2009195A (en) 1977-10-24 1978-10-23 Process of Purification of Silicone Materials
DE19782846305 DE2846305C2 (en) 1977-10-24 1978-10-24 Process for removing low molecular weight organopolysiloxanes and impurities from curable organopolysiloxanes of technical purity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7731902A FR2406650A1 (en) 1977-10-24 1977-10-24 PROCESS FOR PURIFYING SILICONE RESINS WITH A VIEW TO REDUCING THEIR WEIGHT LOSS UNDER PRESSURE VACUUM

Publications (2)

Publication Number Publication Date
FR2406650A1 true FR2406650A1 (en) 1979-05-18
FR2406650B1 FR2406650B1 (en) 1981-12-18

Family

ID=9196847

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7731902A Granted FR2406650A1 (en) 1977-10-24 1977-10-24 PROCESS FOR PURIFYING SILICONE RESINS WITH A VIEW TO REDUCING THEIR WEIGHT LOSS UNDER PRESSURE VACUUM

Country Status (3)

Country Link
DE (1) DE2846305C2 (en)
FR (1) FR2406650A1 (en)
GB (1) GB2009195A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2639951A1 (en) * 1988-11-25 1990-06-08 Rhone Poulenc Chimie PROCESS FOR OBTAINING A THREADABLE AND CERAMISABLE POLYCARBOSILANE
EP0492001A1 (en) * 1990-12-28 1992-07-01 Dow Corning Toray Silicone Company, Limited Silicone-modified thermoplastic resin
FR2747683A1 (en) * 1996-04-19 1997-10-24 Centre Nat Etd Spatiales Stabilisation of silicone resins for use in spatial applications

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4300168A1 (en) * 1993-01-07 1994-07-14 Penn White Ltd Depolymerization agents and depolymerization processes for silicones
DE10032820A1 (en) * 2000-07-06 2002-01-24 Wacker Chemie Gmbh Process for the isolation of polyorganosiloxanes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2639951A1 (en) * 1988-11-25 1990-06-08 Rhone Poulenc Chimie PROCESS FOR OBTAINING A THREADABLE AND CERAMISABLE POLYCARBOSILANE
EP0377351A1 (en) * 1988-11-25 1990-07-11 Rhone-Poulenc Chimie Process for preparing a spinnable ceramic-forming polycarbosilane
US5028678A (en) * 1988-11-25 1991-07-02 Rhone-Poulenc Chimie Extrudable pre-ceramic polycarbosilanes
EP0492001A1 (en) * 1990-12-28 1992-07-01 Dow Corning Toray Silicone Company, Limited Silicone-modified thermoplastic resin
FR2747683A1 (en) * 1996-04-19 1997-10-24 Centre Nat Etd Spatiales Stabilisation of silicone resins for use in spatial applications

Also Published As

Publication number Publication date
DE2846305C2 (en) 1983-05-05
DE2846305A1 (en) 1979-04-26
FR2406650B1 (en) 1981-12-18
GB2009195A (en) 1979-06-13

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