Outdoor durable powder coating compositions

C - Chemistry – Metallurgy – 08 – G

Patent

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C08G 63/91 (2006.01) C07D 303/16 (2006.01) C08G 59/12 (2006.01) C08G 63/16 (2006.01) C09D 5/03 (2006.01) C09D 163/00 (2006.01) C09D 167/02 (2006.01)

Patent

CA 2186130

A semi-crystalline polyglycidylester obtainable by glycidation of the acid groups of a semi-crystalline acid functional polyester the latter being a reaction product of at least compound(s) A and compound(s) B, wherein compound A is a straight chain aliphatic alpha, omega-dicarboxylic acid having at least 6 carbon atoms, and wherein compounds B is a straight chain aliphatic alpha, omega-primary diol having at least 4 carbon atoms, said reaction product having an acid content of from 1.6 meq/g to 4.0 meq/g, a number average molecular weight of at least 500, a melting temperature (Tm) by Differential Scanning Calorimetry of 25°C, an average acid functionality of 2 or more and essentially no reactive groups other than carboxyl groups.

Polyglycidylester semi-cristallin obtenu par glycidation des groupes d'acides d'un polyester fonctionnel d'acide semi-cristallin, lequel est un produit de réaction entre au moins un composé A et au moins un composé B, le composé A étant un acide alpha, oméga-dicarboxylique aliphatique à chaîne droite possédant au moins 6 atomes de carbone, et le composé B étant un diol alpha, oméga-primaire aliphatique à chaîne droite possédant au moins 4 atomes de carbone; ledit produit de réaction possède une teneur en acide comprise entre ?1,6 meq/g et ?4,0 meq/g, un poids moléculaire moyen au nombre d'au moins 500, une température de fusion (Tm) de ?25 ~C obtenue par analyse calorimétrique à compensation de puissance, une fonctionnalité d'acide moyenne de 2 ou davantage, mais il ne possède pratiquement pas de groupes réactifs en dehors des groupes carboxyles.

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