POLYESTER RESIN POWDER COATING COMPOSITIONS

摘要

POLYESTER RESIN POWDER COATING COMPOSITIONS The invention consists of a new method of curing a polyester powder coating composition. The resin is cured by the use of an organotitanium or organozirconium derivative of alkanolamine having the formula M3¢(OR)3N!4 or O¢M(OR)3N!2 or R1¢OM(OR)3Nlx where M represents Ti or Zr, R represents a divalent aliphatic radical, x is 1 to 4 and R1 is a saturated hydrocarbyl group or a group containing one or more ether linkages. The method is suitable for use with both hydroxyl-rich and carbon rich polyester resins and the cured coatings have desirable physical properties.