PROCESS FOR PREPARING ADVANCED EPOXY RESINS EMPLOYING A PHOSPHONIUM TRIFLUOROACETATE CATALYST

PROCESS FOR PREPARING ADVANCED EPOXY RESINS EMPLOYING A PHOSPHONIUM TRIFLUOROACETATE CATALYST

Process for advancing epoxy resins in molecular weight by reacting (A) an epoxy resin which is a glycidyl ether of a dihydric phenol or thiophenol having an average of more than one glycidyl ether group per molecule with (B) a dihydric phenolic or thiophenolic compound in the presence of catalytic q...

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Hauptverfasser: DOORAKIAN, GEORGE A, PAUL, MARSHA, A, GIST, ADOLPHUS V
Format: Patent
Sprache:eng ; fre ; ger
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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
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creator DOORAKIAN, GEORGE A
PAUL, MARSHA, A
GIST, ADOLPHUS V
description Process for advancing epoxy resins in molecular weight by reacting (A) an epoxy resin which is a glycidyl ether of a dihydric phenol or thiophenol having an average of more than one glycidyl ether group per molecule with (B) a dihydric phenolic or thiophenolic compound in the presence of catalytic quantities of (C) a phosphonium catalyst. The invention is characterized by employing as the catalyst, component (C), a phosphonium trifluoroacetate salt. The process of this invention produces an advanced epoxy resin wherein the difference obtained by substracting the present epoxide obtained by analysis from the theoretical percent epoxide is from 0.5 to 4, often from 1 to 2. The advanced epoxy resins prepared by the process of this invention are suitable for use in preparing electrical laminates.
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The invention is characterized by employing as the catalyst, component (C), a phosphonium trifluoroacetate salt. The process of this invention produces an advanced epoxy resin wherein the difference obtained by substracting the present epoxide obtained by analysis from the theoretical percent epoxide is from 0.5 to 4, often from 1 to 2. 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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
title PROCESS FOR PREPARING ADVANCED EPOXY RESINS EMPLOYING A PHOSPHONIUM TRIFLUOROACETATE CATALYST
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