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US 8,343,570 B2Granted
Stabilizers for thermosetting powder coating compositions
AssigneeDcc IP
InventorsThomas Gross, Conny Te Walvaart, Hub Bernsen, Jules Lahaye
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AssigneeDcc IP
InventorsThomas Gross, Conny Te Walvaart, Hub Bernsen, Jules Lahaye
Estimating the term…
The present invention relates to thermosetting powder coating compositions comprising of at least one bismuth-containing inorganic pigment, at least one organic phosphorous stabilizer, at least one thermally polymerizable thermosetting powder coating resin and at least one crosslinker. The inventive thermosetting powder coating compositions are advantageously used where there is a need for heat resistant coatings and where only minor surface modifications during over bake conditions are acceptable. The invention also relates to the use of the inventive thermosetting powder coating compositions for the preparation of powdered paints and varnishes for the making of coatings and to coatings obtained therewith.
A colorant composition comprising of:
A method of reducing the discoloration of a thermosetting powder coating composition comprising at least one thermally polymerizable thermosetting powder coating resin, at least one crosslinker and at least one bismuth-containing inorganic pigment, which comprises incorporating in or applying to these composition an organic phosphorous containing stabilizer, wherein the at least one organic phosphorous containing stabilizer is at least one organic phosphite or phosphonite selected from the group consisting of tris(2,4-di-tert-butylphenyl) phosphite, tris(nonylphenyl) phosphite and the formulae
Dependencies are inferred from the claim text.