THIXOTROPIC POLYURETHANE RESIN COMPOSITION

PURPOSE:To obtain a moisture-curing polyurethane resin composition being nonproblematic in storage stability, adhesiveness, resin strength and carcinogenicity, showing stable thixotropy and being useful as an adhesive, a sealing agent or the like by dispersing sepiolite in an active NCO-containing u...

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Bibliographische Detailangaben
Hauptverfasser:	SUGIMORI MASARU, NAKAJIMA TAKAO
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DYES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a moisture-curing polyurethane resin composition being nonproblematic in storage stability, adhesiveness, resin strength and carcinogenicity, showing stable thixotropy and being useful as an adhesive, a sealing agent or the like by dispersing sepiolite in an active NCO-containing urethane prepolymer. CONSTITUTION:0.5-5wt.%, desirably 0.8-3.0wt.%, based on the total weight of the composition, sepiolite (desirably one predried to a water content of 2% or less) is dispersed in an active NCO-containing urethane prepolymer, e.g. one based on a polymer obtained by reacting a polyether polyol of a mol.wt. of 3000 with an excess of MDI in an NCO to OH ratio of 6 and having an NCO content of 9.3wt.% and a viscosity of 8000cP at 25 deg.C to obtain a thixotropic polyurethane composition (of a ratio of the viscosity at 2rpm to that at 20rpm of 3-5).