DE68918877D1 - Verfahren zur Herstellung von cyclischen Polydiorganosiloxanen durch Equilibrierung in der Gasphase. - Google Patents

Verfahren zur Herstellung von cyclischen Polydiorganosiloxanen durch Equilibrierung in der Gasphase.

Info

Publication number
DE68918877D1
DE68918877D1 DE68918877T DE68918877T DE68918877D1 DE 68918877 D1 DE68918877 D1 DE 68918877D1 DE 68918877 T DE68918877 T DE 68918877T DE 68918877 T DE68918877 T DE 68918877T DE 68918877 D1 DE68918877 D1 DE 68918877D1
Authority
DE
Germany
Prior art keywords
equilibration
preparation
gas phase
cyclic polydiorganosiloxanes
polydiorganosiloxanes
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 - Lifetime
Application number
DE68918877T
Other languages
English (en)
Other versions
DE68918877T2 (de
Inventor
Roland Lee Halm
Sidney Alvin Hansen
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 DE68918877D1 publication Critical patent/DE68918877D1/de
Application granted granted Critical
Publication of DE68918877T2 publication Critical patent/DE68918877T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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 System
    • C07F7/02—Silicon compounds
    • C07F7/21—Cyclic compounds having at least one ring containing silicon, but no carbon in the ring
DE68918877T 1988-01-15 1989-01-10 Verfahren zur Herstellung von cyclischen Polydiorganosiloxanen durch Equilibrierung in der Gasphase. Expired - Lifetime DE68918877T2 (de)

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 (2)

Publication Number Publication Date
DE68918877D1 true DE68918877D1 (de) 1994-11-24
DE68918877T2 DE68918877T2 (de) 1995-05-18

Family

ID=22507913

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68918877T Expired - Lifetime DE68918877T2 (de) 1988-01-15 1989-01-10 Verfahren zur Herstellung von cyclischen Polydiorganosiloxanen durch Equilibrierung in der Gasphase.

Country Status (8)

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

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
CN102137883B (zh) * 2008-08-27 2013-09-18 陶氏康宁公司 聚硅氧烷再分布的工艺方法
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 (de) * 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 (de) * 1966-01-17
NL6816661A (de) * 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 (de) * 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
ATE22896T1 (de) * 1983-05-27 1986-11-15 Consortium Elektrochem Ind 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
EP0328241A2 (de) 1989-08-16
EP0328241B1 (de) 1994-10-19
CN1034730A (zh) 1989-08-16
JPH078876B2 (ja) 1995-02-01
JPH01216999A (ja) 1989-08-30
CN1020455C (zh) 1993-05-05
BR8900175A (pt) 1989-09-12
US4764631A (en) 1988-08-16
EP0328241A3 (en) 1990-12-05
CA1326677C (en) 1994-02-01
ES2009698A6 (es) 1989-10-01
DE68918877T2 (de) 1995-05-18

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