Nonionic, water-dispersible polyisocyanates as concrete additives

Additives for inorganic binders used to make mortar or concrete, comprise water dispersible polyisocyanate mixtures (M1) that have an average isocyanate functionality of 1.8-4, contain 4-25 wt.% (cyclo)aliphatic isocyanate groups (calculated as NCO ; molecular weight = 42), contain 5-80 wt.% ethylen...

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Bibliographische Detailangaben
Hauptverfasser:	J. MAZANEK, M. BRAHAM, H.-J. LAAS
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS REFRACTORIES SLAG THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	Additives for inorganic binders used to make mortar or concrete, comprise water dispersible polyisocyanate mixtures (M1) that have an average isocyanate functionality of 1.8-4, contain 4-25 wt.% (cyclo)aliphatic isocyanate groups (calculated as NCO ; molecular weight = 42), contain 5-80 wt.% ethylene oxide (EO) groups (calculated as C2H2O ; molecular weight = 44) in the polyether chain and contain a statistical average of 5-50 EO groups in the polyether chain. Also claimed are (i) similar mixtures (M2) that have an average isocyanate functionality of 1.8-3.5, contain 6-21.5 wt.% aliphatic isocyanate groups, contain 5-75 wt.% EO groups in the polyether chain and contain an average of 5-25 EO groups in the polyether chain and (ii) similar mixtures (M3) that have an average isocyanate functionality of 1.8-3.5, contain 4-13 wt.% cycloaliphatic isocyanate groups, contain 10-70 wt.% EO groups in the polyether chain and contain an average of 5-25 EO groups in the polyether chain.