Novel polyurea isocyanates

The present invention provides novel prepolymers comprising a blend of a toluene diisocyanate prepolymer, formed from a toluene diisocyanate and a polyol, and a diphenylmethane diisocyanate or a diphenylmethane diisocyanate quasi-prepolymer. The present invention also provides polyurea elastomers co...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	CONNER MARK DAVID
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES INKS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The present invention provides novel prepolymers comprising a blend of a toluene diisocyanate prepolymer, formed from a toluene diisocyanate and a polyol, and a diphenylmethane diisocyanate or a diphenylmethane diisocyanate quasi-prepolymer. The present invention also provides polyurea elastomers comprising the novel prepolymer blends reacted with an amine-terminated chain extender or cross-linker to form the polyurea elastomer. The present invention further provides methods for preparing the novel prepolymers and the polyurea elastomers. The novel polyurea elastomers have improved modulus, tensile properties, adhesion, and surface characteristics and may be applied by spraying, troweling, casting, or caulking.