PRODUCTION OF RIGID FOAM CONTAINING URETHANE AND ISOCYANURATE GROUPS

PRODUCTION OF RIGID FOAM CONTAINING URETHANE AND ISOCYANURATE GROUPS

Rigid foams containing urethane and isocyanurate groups are produced by reacting a) polyisocyanates with b) compounds containing at least two hydrogen atoms which are reactive towards isocyanates and having a molecular weight of from 400 to 10,000, and c) optionally compounds containing at least two...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: RORUFU BUIIDAAMAN, SHIYUTEFUAN BUENDERU, URURITSUHI UEEBAA
Format: Patent
Sprache:eng
Schlagworte:
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Beschreibung
Zusammenfassung:Rigid foams containing urethane and isocyanurate groups are produced by reacting a) polyisocyanates with b) compounds containing at least two hydrogen atoms which are reactive towards isocyanates and having a molecular weight of from 400 to 10,000, and c) optionally compounds containing at least two hydrogen atoms which are reactive towards isocyanates and having a molecular weight of 32-399, in the presence of d) NCO trimerisation catalysts and e) mixtures of n-pentane and/or isopentane with cyclopentane as blowing agent, and optionally f) further blowing agents and auxiliaries and additives known per se, and are used as insulating materials.