Stabilized urethane based surface coating

摘要

An improved urethane pre-polymer-based surface coating comprising a mineral filler the improvement comprising a benzothiazolythio compound and arylsulphorylisocyanate compound. A method of delaying or preventing the cross-linking or gelation of a urethane pre-polymer-based surface coating prepared with a mineral filler, comprises adding to of the formulation the surface coating a benzothiazolythio compound and an arylsulphonylisocyanate compound in amounts effective to prevent or delay the cross-linking or gelation of the surface coating.

主权项

1. A mineral-filled urethane pre-polymer-based surface coating, comprising free isocyanate groups, the improvement comprising
a) a benzothiazolythio compound of the chemical formula: wherein R1 is (C1 to C8)alkyl and R2 is hydrogen, halogen, NO2, CN, alkoxy or carbonyloxyalkyl, said halogen, NO2, CN, alkoxy and carbonyloxyalkyl substituent being non-reactive with components of the surface coating:
and b) an arylsulphonylisocyanate of the chemical formula
R3—SO2—N═C═O wherein R3 is (C6 to C12) aryl or (C6 to C12)aryl substituted with at least one hydrogen, halogen, NO2, alkoxy or carbonyloxyalkyl substituent, and wherein said aryl substituent is non-reactive with components of the surface coating.