GB870024A - Improvements relating to organosilicon compounds - Google Patents

Improvements relating to organosilicon compounds

Info

Publication number
GB870024A
GB870024A GB25152/59A GB2515259A GB870024A GB 870024 A GB870024 A GB 870024A GB 25152/59 A GB25152/59 A GB 25152/59A GB 2515259 A GB2515259 A GB 2515259A GB 870024 A GB870024 A GB 870024A
Authority
GB
United Kingdom
Prior art keywords
dimethyl
hydrolysed
polysiloxane
solution
curing
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
GB25152/59A
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 GB870024A publication Critical patent/GB870024A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • 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
    • C07F7/12Organo silicon halides

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)

Abstract

The invention comprises silylarylene compounds having the formula: <FORM:0870024/IV (a)/1> where X is chlorine, bromine or hydroxyl, and polymers derived therefrom having the recurring unit: <FORM:0870024/IV (a)/2> A mixture of bis (p-dimethylchlorosilylphenyl) dimethyl and bis (p-dimethylbromosilylphenyl) dimethyl silanes is prepared by reacting dimethyl-dichlorosilane with dimethyl-di-(p-bromophenyl) silane in the presence of magnesium in ether. The product also probably contains the mixed bromochloro derivative. These silanes are hydrolysed with a saturated solution of sodium bicarbonate to the disilanol which is then hydrolysed with aqueous KOH to give a solid elastic polysiloxane. This polymer can be mixed with finely divided silica and benzoyl or other peroxide and heated to form a cured elastomer. The curing may be effected in situ on a base such as cloth or a copper conductor by applying a solution of the uncured mixture in a solvent such as benzene or toluene. The halosilanes may also be applied to such materials as masonry, textiles and paper, where they are hydrolysed by atmospheric moisture to give a water-repellent surface. The disilanols may be co-condensed with other siloxanes, e.g. methyl and phenyl cyclic tetrasiloxanes.ALSO:A copper core is provided with a heat-resisting polysiloxane insulating coating by passing it through a solution-dispersion of a polysiloxane (see below), filler and curing agent, in a solvent such as benzene or toluene, and heating to cure. The siloxane has the repeating unit <FORM:0870024/III/1> Suitable fillers are finely divided silicas, and the curing agents are peroxides. Water-repellent films of the siloxane may also be provided on solid bodies, e.g. masonry, by applying the corresponding halosilanes and allowing hydrolysis to occur by atmospheric moisture.
GB25152/59A 1958-08-15 1959-07-22 Improvements relating to organosilicon compounds Expired GB870024A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US870024XA 1958-08-15 1958-08-15

Publications (1)

Publication Number Publication Date
GB870024A true GB870024A (en) 1961-06-07

Family

ID=22202271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25152/59A Expired GB870024A (en) 1958-08-15 1959-07-22 Improvements relating to organosilicon compounds

Country Status (1)

Country Link
GB (1) GB870024A (en)

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