Colour indicators for curing of unsatd. polyester(s)

Colour indicators for curing of unsatd. polyester(s)

Controlled cross-linking of unsatd. polyester resins is carried out in the presence of (a) a metal cation-contg. accelerator, (b) an organic peroxide initiator, and opt. (c) a promoter. The cross-linking is effected in the presence of 0.005-0.5 (pref. 0.01-0.1)% (based on the wt. of the resin) of a...

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Hauptverfasser: MAGDANYI LASZLO, KECSKEMETHY GEZA, KOVACSAY ISTVAN
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Sprache:eng ; ita
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AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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creator MAGDANYI LASZLO
KECSKEMETHY GEZA
KOVACSAY ISTVAN
description Controlled cross-linking of unsatd. polyester resins is carried out in the presence of (a) a metal cation-contg. accelerator, (b) an organic peroxide initiator, and opt. (c) a promoter. The cross-linking is effected in the presence of 0.005-0.5 (pref. 0.01-0.1)% (based on the wt. of the resin) of a cpd. (I) of the formula (where R1-R4 are H, OH, NO2, SO3H or SO3Na, with the proviso that at least one is not H), cross-linking being indicated by a colour change in the reaction medium. The technique allows visual control of the process.
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subjects AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
title Colour indicators for curing of unsatd. polyester(s)
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