VERFAHREN ZUR HERSTELLUNG VON ZELLIGEN POLYURETHANEN

VERFAHREN ZUR HERSTELLUNG VON ZELLIGEN POLYURETHANEN

The prodn of cellular polyurethanes (PU) comprises reacting (a) polyisocyanate(s) and/or modified polyisocyanate(s), (b) high-mol wt cpd(s) with at least two reactive H atoms, and opt (c) low-mol wt chain extenders and/or crosslinkers in the presence of (d) acetal(s) as blowing agent, (e) catalysts...

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Hauptverfasser: HENDREICH, REGINA, WENZEL, MARION, FALKE, PETER, TINTELNOT, DIETER
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Sprache:ger
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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 HENDREICH, REGINA
WENZEL, MARION
FALKE, PETER
TINTELNOT, DIETER
description The prodn of cellular polyurethanes (PU) comprises reacting (a) polyisocyanate(s) and/or modified polyisocyanate(s), (b) high-mol wt cpd(s) with at least two reactive H atoms, and opt (c) low-mol wt chain extenders and/or crosslinkers in the presence of (d) acetal(s) as blowing agent, (e) catalysts and opt (f) additives etc. Also claimed is the same process for the prodn of (i) PU mouldings with a compact surface zone and a cellular core, and (ii) flexible PU foam.
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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 VERFAHREN ZUR HERSTELLUNG VON ZELLIGEN POLYURETHANEN
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