MODIFIED EPOXY RESINS HAVING A NARROW MOLECULAR WEIGHT DISTRIBUTION

A process for preparing a modified epoxy resin with a molecular weight distribution of from 1.9 to 4.5 and an epoxy group content of less than 200 mmol/kg by reacting at a temperature of from 135 to 215 DEG C an aromatic epoxy resin having an epoxy group content of at least 250 mmol/kg and from 1.5...

Full description

Saved in:
Bibliographic Details
Main Authors DIJKSTRA, TETTE JAN, STACHOWIAK, STEPHEN ANTHONY, JONGEPIER, WOUTER WILLEM, DECOCQ, FRANCOISE IRENE MARIE BERNADETTE
Format Patent
LanguageEnglish
Published 21.07.1993
Edition5
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
Online AccessGet full text

Cover

More Information
Summary:A process for preparing a modified epoxy resin with a molecular weight distribution of from 1.9 to 4.5 and an epoxy group content of less than 200 mmol/kg by reacting at a temperature of from 135 to 215 DEG C an aromatic epoxy resin having an epoxy group content of at least 250 mmol/kg and from 1.5 to 2.2 epoxy groups per molecule with from 5 to 170% molar excess of a dihydroxy compound of formula: in which R is hydrogen or C1-C4 alkyl and n is a number of from 1 to 4, in the presence of an etherification catalyst selected from stannous halides and stannous carboxylates.
Bibliography:Application Number: EP19920200290