GB856321A - Improvements in or relating to siloxane elastomers - Google Patents

Improvements in or relating to siloxane elastomers

Info

Publication number
GB856321A
GB856321A GB5099/59A GB509959A GB856321A GB 856321 A GB856321 A GB 856321A GB 5099/59 A GB5099/59 A GB 5099/59A GB 509959 A GB509959 A GB 509959A GB 856321 A GB856321 A GB 856321A
Authority
GB
United Kingdom
Prior art keywords
silanes
mixture
acid
under nitrogen
added
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
GB5099/59A
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.)
Rhone Poulenc SA
Original Assignee
Rhone Poulenc SA
Societe des Usines Chimiques Rhone Poulenc SA
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 Rhone Poulenc SA, Societe des Usines Chimiques Rhone Poulenc SA filed Critical Rhone Poulenc SA
Publication of GB856321A publication Critical patent/GB856321A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • 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
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
    • C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Dental Preparations (AREA)

Abstract

An elastomeric solid is made by adding to liquid diorganosiloxanes having a linear structure, Si-bonded monovalent hydrocarbon or halohydrocarbon radicals, a viscosity between 5,000 and 500,000 cs. at 25 DEG C. and contain at least 0,1% of Si-bonded OH groups, from 0,5 to 10% by weight of the siloxanes of a silane of the formula R. Si(OCOR1)3, wherein R is a lower alkyl, alkenyl, aryl or aralkyl group and R1 is an alkyl group containing 1 to 18 C atoms, but excluding methyltriacetoxysilane which is claimed in the parent Specification. Silanes specified are methyltri-propionoxy, -oleyloxy and -benzoyloxy and ethyltriacetoxy silanes. The silanes may be diluted with inert powders or octomethylcyclotetrasiloxane. Fillers, e.g. natural, precipitated and fume silicas, alkoxy modified silicas and oxides of Al, Fe, Zn and Cd and vulcanisation accelerators, e.g. oxalic acid, p-aminobenzoic acid, morpholine, ethanolamine, diethylaminoethanol, methyldiethanolamine, o-toluene sulphonamide and urea, may also be added. Examples are given in which the siloxanes used are made by heating the cyclic tetramer under nitrogen at 150 DEG C. with aqueous KOH to yield an oil to which water is added in small quantities over a period of about 4 hours. The mixture is allowed to cool and the KOH is neutralised by adding silica. The resulting liquid is then heated under nitrogen to remove volatiles and to give the desired oil. Organotriacyloxysilanes are made by reaction of an organic acid, its anhydride or its alkali metal salt with an organotrihalogenosilane. In Examples, (1) methyltribenzoyloxysilane is made by the action of methyltrichlorosilane on anhydrous sodium benzoate dispersed in toluene; (2) methyl-tripropionoxysilane is made by progressively heating to gentle boiling (150 DEG C.) a mixture of methtrichlorosilane and propionic acid; and (3) ethyltriacetoxysilane is made by refluxing a mixture of acetic anhydride and ethyltrichlorosilane. Uses. For moulding (notably for dental use), for sticking various materials together and for treatment of fabrics.
GB5099/59A 1958-12-02 1959-02-13 Improvements in or relating to siloxane elastomers Expired GB856321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR856321X 1958-12-02

Publications (1)

Publication Number Publication Date
GB856321A true GB856321A (en) 1960-12-14

Family

ID=9328823

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5099/59A Expired GB856321A (en) 1958-12-02 1959-02-13 Improvements in or relating to siloxane elastomers

Country Status (1)

Country Link
GB (1) GB856321A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174401A (en) * 1985-03-26 1986-11-05 Gen Electric Self-leveling silicone sealant compositions
US5026812A (en) * 1988-11-24 1991-06-25 Dow Corning Gmbh Organopolysiloxane composition curable to an elastomer and use thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174401A (en) * 1985-03-26 1986-11-05 Gen Electric Self-leveling silicone sealant compositions
GB2174401B (en) * 1985-03-26 1989-12-13 Gen Electric Self-leveling silicone sealant compositions and methods for making same
US5026812A (en) * 1988-11-24 1991-06-25 Dow Corning Gmbh Organopolysiloxane composition curable to an elastomer and use thereof

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