PROCESS FOR THE PREPARATION OF A POLYTHIOETHERSULFIDE

Process for the production of a liquid mercapto-terminated polythioethersulfide comprising the step of reacting, at a temperature in the range 0-100° C. and in the presence of a catalyst:at least one compound selected from the group consisting of (i) dimercapto-dioxa-alkanes (DMDAs) and (ii) glycol...

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Bibliographic Details
Main Authors BURKHARDT, Volker, KLOBES, Olaf, PROBST, Christian
Format Patent
LanguageEnglish
Published 25.11.2021
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Summary:Process for the production of a liquid mercapto-terminated polythioethersulfide comprising the step of reacting, at a temperature in the range 0-100° C. and in the presence of a catalyst:at least one compound selected from the group consisting of (i) dimercapto-dioxa-alkanes (DMDAs) and (ii) glycol di(mercapto carboxylic acid ester)s (GDMEs),at least one dimercapto-dialkyl sulfide (DMDS)at least one di-epoxide, andoptionally at least one branching agent selected from compounds having at least three terminal groups selected from epoxy and mercapto groups,wherein the molar ratio (DMDA+GDME)/DMDS is in the range 1.1-4.0.
Bibliography:Application Number: US201816886868