Polyester resin powder coating compositions
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United States of America Patent
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Feb 21, 1995
Grant Date -
N/A
app pub date -
May 11, 1994
filing date -
May 19, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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 an alkanolamine having the formula M.sub.3 [(OR).sub.3 N].sub.4 or O[M(OR).sub.3 N].sub.2 or R.sup.1 [OM(OR).sub.3 N].sub.x where M represents Ti or Zr, R represents a divalent aliphatic radical, x is 1 to 4 and R .sup.1 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 carboxyl-rich polyester resins and the cured coatings have desirable physical properties.
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