ES2009698A6 - Preparacion de ciclopolidiorganosiloxanos mediante trasposicion en fase de vapor. - Google Patents

Preparacion de ciclopolidiorganosiloxanos mediante trasposicion en fase de vapor.

Info

Publication number
ES2009698A6
ES2009698A6 ES8900105A ES8900105A ES2009698A6 ES 2009698 A6 ES2009698 A6 ES 2009698A6 ES 8900105 A ES8900105 A ES 8900105A ES 8900105 A ES8900105 A ES 8900105A ES 2009698 A6 ES2009698 A6 ES 2009698A6
Authority
ES
Spain
Prior art keywords
cyclopolydiorganosiloxane
r2sio
cyclopolydiorganosiloxanes
preparation
vapor phase
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
ES8900105A
Other languages
English (en)
Inventor
Roland Lee Halm
Sidney Alvin Hansen
Jr Charles Ervin Neal
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.)
Dow Silicones Corp
Original Assignee
Dow Corning Corp
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 Dow Corning Corp filed Critical Dow Corning Corp
Publication of ES2009698A6 publication Critical patent/ES2009698A6/es
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
    • C08G77/045—Polysiloxanes containing less than 25 silicon atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/21—Cyclic compounds having at least one ring containing silicon, but no carbon in the ring

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Silicon Polymers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PREPARACION DE CICLOPOLIDIORGANOSILOXANOS MEDIANTE TRASPOSICION EN FASE DE VAPOR. SE DESCRIBE UN PROCEDIMIENTO PARA PREPARAR UN CICLOPOLIDIORGANOSILOXANO (R2SIO)C. EL PROCEDIMIENTO COMPRENDE: (A) VAPORIZAR UNA ALIMENTACION DE UN MATERIAL DE CICLOPOLIDIORGANOSILOXANO (R2SIO)X; (B) PASAR LOS VAPORES DE (A) A TRAVES DE UN LECHO CALIENTE DE UN CATALIZADOR SOLIDO, DONDE EL CATALIZADOR COMPRENDE UN COMPUESTO DE UN METAL ALCALINO; (C) CONTROLAR LA PRESION Y LA TEMPERATURA EN EL LECHO DE CATALIZADOR CALIENTE PARA FAVORECER LA FORMACION DE (R2SIO)C EN UNA MEZCLA DE EQUILIBRIO CON OTROS CICLOPOLIDIORGANOSILOXANOS; Y (D) RECUPERAR UNA CANTIDAD DEL CICLOPOLIDIORGANOSILOXANO PRODUCTO (R2SIO)C, QUE ES SUSTANCIALMENTE MAS ALTA QUE LA CANTIDAD PRESENTE EN EL CICLOPOLIDIORGANOSILOXANO DE LA ALIMENTACION.
ES8900105A 1988-01-15 1989-01-12 Preparacion de ciclopolidiorganosiloxanos mediante trasposicion en fase de vapor. Expired ES2009698A6 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/144,287 US4764631A (en) 1988-01-15 1988-01-15 Preparation of cyclopolydiorganosiloxanes via vapor phase rearrangement

Publications (1)

Publication Number Publication Date
ES2009698A6 true ES2009698A6 (es) 1989-10-01

Family

ID=22507913

Family Applications (1)

Application Number Title Priority Date Filing Date
ES8900105A Expired ES2009698A6 (es) 1988-01-15 1989-01-12 Preparacion de ciclopolidiorganosiloxanos mediante trasposicion en fase de vapor.

Country Status (8)

Country Link
US (1) US4764631A (es)
EP (1) EP0328241B1 (es)
JP (1) JPH078876B2 (es)
CN (1) CN1020455C (es)
BR (1) BR8900175A (es)
CA (1) CA1326677C (es)
DE (1) DE68918877T2 (es)
ES (1) ES2009698A6 (es)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4895967A (en) * 1988-09-26 1990-01-23 General Electric Company Method for making cyclic poly(siloxane)s
US5110972A (en) * 1991-07-18 1992-05-05 Tremco Incorporated Process for recycling silicone scrap and products relating thereto
US5196559A (en) * 1992-01-23 1993-03-23 Dow Corning Corporation Equilibration of cyclic siloxanes with novel catalysts
US5233070A (en) * 1992-12-23 1993-08-03 Dow Corning Corporation Process for converting chlorine end-terminated polyorganosiloxanes to polyorganocyclosiloxanes
US5420325A (en) * 1994-07-29 1995-05-30 General Electric Company Siloxane cracking process
US5491249A (en) * 1995-04-20 1996-02-13 Hercules Incorporated Process for preparing cyclic polysiloxanes from linear polysiloxanes
JPH1045770A (ja) * 1996-07-29 1998-02-17 Toray Dow Corning Silicone Co Ltd ヘキサメチルシクロトリシロキサンの分離方法
AU6559996A (en) * 1996-09-13 1998-03-19 Huntsman, Peter Harold Process for the recovery of methyl polysiloxanes in the form of methyl cyclosiloxanes
US6262289B1 (en) 1997-06-11 2001-07-17 Kaneka Corporation Process for preparing cyclic oligosiloxanes
JP4663838B2 (ja) 2000-01-28 2011-04-06 東レ・ダウコーニング株式会社 環状シロキサンの製造方法
US7108771B2 (en) * 2001-12-13 2006-09-19 Advanced Technology Materials, Inc. Method for removal of impurities in cyclic siloxanes useful as precursors for low dielectric constant thin films
US7456488B2 (en) * 2002-11-21 2008-11-25 Advanced Technology Materials, Inc. Porogen material
US7423166B2 (en) * 2001-12-13 2008-09-09 Advanced Technology Materials, Inc. Stabilized cyclosiloxanes for use as CVD precursors for low-dielectric constant thin films
US8461274B2 (en) * 2008-08-27 2013-06-11 Dow Corning Corporation Polysiloxane redistribution process
CN114729128B (zh) * 2020-03-10 2024-03-22 瓦克化学股份公司 对来自传热应用的(m/d/t)-甲基聚硅氧烷混合物进行处理的方法

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438478A (en) * 1942-02-26 1948-03-23 Corning Glass Works Method of preparing silicones and product thereof
US2455999A (en) * 1944-08-01 1948-12-14 Corning Glass Works Method of preparing organosilicones
BE537467A (es) * 1954-04-21
US2884432A (en) * 1956-02-09 1959-04-28 Dow Corning Method of preparing cyclic siloxanes
US2860152A (en) * 1956-04-26 1958-11-11 Dow Corning Method of producing cyclic diorganosiloxanes
US2979519A (en) * 1956-06-27 1961-04-11 Dow Corning New cyclotrisiloxanes
US3110720A (en) * 1960-11-01 1963-11-12 Union Carbide Corp Process for producing cyclic diorganosiloxanes from diorganodihalosilanes and alkaliand alkali earth metal oxides and carbonates
NL129878C (es) * 1966-01-17
NL6816661A (es) * 1968-12-18 1970-05-25
GB1293944A (en) * 1969-04-18 1972-10-25 Dow Corning Ltd Preparation of cyclic siloxanes
US3607898A (en) * 1969-08-20 1971-09-21 Gen Electric Process for preparing cyclic syn-tetramethyltetravinyltetrasiloxane
JPS5250791B2 (es) * 1972-12-30 1977-12-27
US3846464A (en) * 1973-11-27 1974-11-05 Gen Electric Process for preparing cyclic methylvinylsiloxanes
US4111973A (en) * 1977-12-01 1978-09-05 General Electric Company Process for producing a cyclotrisiloxane in a cracking reaction
JPS54117491A (en) * 1978-03-06 1979-09-12 Asahi Chem Ind Co Ltd Preparation of octamethyl-cyclotetrasiloxane
US4412081A (en) * 1982-08-27 1983-10-25 General Electric Company Methods for preparing decamethyl cyclopentasiloxane
EP0126792B1 (de) * 1983-05-27 1986-10-15 Consortium für elektrochemische Industrie GmbH Verfahren zur Herstellung von Hexamethylcyclotrisiloxan und eine Verwendung des so hergestellten Cyclotrisiloxans
US4556726A (en) * 1985-01-09 1985-12-03 Union Carbide Corporation Process for converting octamethylcyclotetrasiloxane to decamethylcyclopentasiloxane
US4689420A (en) * 1985-11-19 1987-08-25 Dow Corning Corporation Process for preparation of cyclopolydiorganosiloxanes

Also Published As

Publication number Publication date
CN1020455C (zh) 1993-05-05
CA1326677C (en) 1994-02-01
JPH078876B2 (ja) 1995-02-01
EP0328241A2 (en) 1989-08-16
JPH01216999A (ja) 1989-08-30
EP0328241B1 (en) 1994-10-19
CN1034730A (zh) 1989-08-16
US4764631A (en) 1988-08-16
BR8900175A (pt) 1989-09-12
EP0328241A3 (en) 1990-12-05
DE68918877D1 (de) 1994-11-24
DE68918877T2 (de) 1995-05-18

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20050113