GB787800A - A novel trisiloxane - Google Patents

A novel trisiloxane

Info

Publication number
GB787800A
GB787800A GB22262/56A GB2226256A GB787800A GB 787800 A GB787800 A GB 787800A GB 22262/56 A GB22262/56 A GB 22262/56A GB 2226256 A GB2226256 A GB 2226256A GB 787800 A GB787800 A GB 787800A
Authority
GB
United Kingdom
Prior art keywords
diphenylmethylsilanol
dimethyldichlorosilane
trisiloxane
novel
compound
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
GB22262/56A
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.)
Midland Silicones Ltd
Original Assignee
Midland Silicones 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 Midland Silicones Ltd filed Critical Midland Silicones Ltd
Publication of GB787800A publication Critical patent/GB787800A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02Silicon compounds
    • C07F7/08Compounds having one or more C—Si linkages
    • C07F7/0834Compounds having one or more O-Si linkage
    • C07F7/0838Compounds with one or more Si-O-Si sequences

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)

Abstract

The invention comprises the compound 1,1,5,5 - tetraphenyl - 1,3,3,5 - tetramethyltrisiloxane, useful as a vacuum diffusion pump fluid. It is best prepared by reacting diphenylmethylsilanol with dimethyldichlorosilane at a temperature below 100 DEG C. in the presence of a hydrogen halide acceptor such as pyridine in amount at least sufficient to react with all the hydrogen chloride produced. Less satisfactory methods of preparing the compound include: (1) cohydrolysis of the corresponding chlorosilanes; (2) catalytic copolymerization of tetraphenyldimethyldisiloxane and dimethylsiloxane; and (3) reaction of the sodium salt of diphenylmethylsilanol with dimethyldichlorosilane. Specifications 612,595 and 684,440 are referred to.
GB22262/56A 1955-10-07 1956-07-18 A novel trisiloxane Expired GB787800A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US787800XA 1955-10-07 1955-10-07

Publications (1)

Publication Number Publication Date
GB787800A true GB787800A (en) 1957-12-18

Family

ID=22146171

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22262/56A Expired GB787800A (en) 1955-10-07 1956-07-18 A novel trisiloxane

Country Status (3)

Country Link
FR (1) FR1158850A (en)
GB (1) GB787800A (en)
NL (2) NL209448A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309557A (en) * 1981-02-12 1982-01-05 Nusil Research Process for the preparation of alkyl and aryl substituted oligosiloxanes suitable for use as diffusion pump oils

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309557A (en) * 1981-02-12 1982-01-05 Nusil Research Process for the preparation of alkyl and aryl substituted oligosiloxanes suitable for use as diffusion pump oils

Also Published As

Publication number Publication date
FR1158850A (en) 1958-06-19
NL95177C (en) 1900-01-01
NL209448A (en) 1900-01-01

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