METHOD OF PREPARING POLYSULFIDE OLIGOMERS

technology of synthesis of polysulfide oligomers used as substrate of sealing, adhesive and pouring materials in various industries including optics and optoelectronics. SUBSTANCE: described is method of preparing polysulfide oligomers by reacting organic di- and polyhalides of general formula: R(Cl...

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Bibliographic Details
Main Authors IOFFE D.S, SHUMILINA T.N, GUBAJDULLIN I.L, GUBAJDULLIN L.JU, LIAKUMOVICH A.G
Format Patent
LanguageEnglish
Russian
Published 10.08.2000
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:technology of synthesis of polysulfide oligomers used as substrate of sealing, adhesive and pouring materials in various industries including optics and optoelectronics. SUBSTANCE: described is method of preparing polysulfide oligomers by reacting organic di- and polyhalides of general formula: R(Cl)n wherein R is aliphatic hydrocarbon or oxygen-containing hydrocarbon radical, n is equal or more than 2, in aqueous medium with sodium thiosulfate and subsequently reacting thiosulfate derivatives with sodium hydrosulfide during heating operation. Reaction of di- and polyhalides with sodium thiosulfate is carried out in the presence of sodium sulfite in amount from 5 to 20 wt.pts per 100 wt.pts of di- and polyhalides. EFFECT: optically pure polysulfide oligomers with light transmission value up to 100%. 2 ex
Bibliography:Application Number: RU19990119763