Urethane coating compositions
Abstract
Abstract A SINGLE PACKAGE, MOISTURE-CURABLE, STABILIZED, URETHANE COATING COMPOSITION CONTAINING UNREACTED ISOCYANATE GROUPS AND CAPABLE OF CARING TO A HARD SURFACE FILM AT AMBIENT TEMPERATURE IN ABOUT TWO TO EIGHT HOURS COMPRISES AN ISOCYANATE-TERMINATED PREPOLYMER PREPARED BY REACTING (1) AN ORGANIC POLYOL WITH (2) A STOICHIOMETRIC EXCESS OF AN ORGANIC POLYISOCYANATE IN THE PRESENCE OF AN INERT SOLVENT AND OPTIONALLY IN THE PRESENCE OF A TETRAVALENT METALLOORGANIC SALT CATALYST. THE RESULTING PREPOLYMER IS THEN ADMIXED WITH A BORON TRIFLUORIDE COMPOUND, A SELECTED AMINE AND A TETRAVALENT METALLO-ORGANIC SALT. OPTIONALLY, THE BORON TRIFLUORIDE COMPOUND MAY BE ADDED TO EITHER (A) THE ORGANIC POLYOL, (B) THE ORGANIC POLYISOCYANATE PRIOR TO THE PREPARATION OF THE ISOCYANATETERMINATED PREPOLYMER, OR (C) TO THE REACTION MIXTURE DURING THE PREPARATION.
Inventors
- 👤 Bernardas Brizgys
Bibliographic Details
Claims Analysis
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