Polyester and its use in powder coating

Details Polyester and its use in powder coating Polyester and its use in powder coating

C - Chemistry, Metallurgy

08

G

117/197, 402/202

C08G 63/18 (2006.01) C08F 283/01 (2006.01) C08G 63/20 (2006.01) C09D 167/00 (2006.01)

Patent

CA 1216992

ABSTRACT OF THE DISCLOSURE The invention relates to a polyester containing carboxyl groups, based on a substantially aromatic dicarboxylic acid component and a substantially aliphatic diol component, wherein the polyester has the following properties: an acid number between 10 and 26 mg KOH/g, a hydroxyl number of less than 15 mg KOH/g, a theoretical number-average molecular weight between 4,500 and 12,500 and a glass transition temperature between 40 and 85°C, a powder coating containing the polyester, a process for electrostatic coating using the powder coating and a substrate coated using the powder coating. The greater clearness in combination with the excellent flow of the coating, which the polyester/epoxy binding agent systems according to the invention yield, makes these systems particularly suitable as top-coat for automobiles.

439944

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