Coating powders comprising macrocyclic oligomers

Details Coating powders comprising macrocyclic oligomers Coating powders comprising macrocyclic oligomers

C - Chemistry, Metallurgy

09

D

C09D 5/44 (2006.01) C09D 5/03 (2006.01) C09D 5/46 (2006.01) C09D 167/00 (2006.01) C09D 167/06 (2006.01) C09D 169/00 (2006.01) C09D 177/00 (2006.01) C09D 177/02 (2006.01) C09D 177/06 (2006.01) C09D 179/08 (2006.01)

Patent

CA 2351952

A coating powder comprising a macrocyclic oligomer and a ring-opening polymerization agent is applied to an article, fused, and converted to a linear polymer at a temperature of from about 160 to about 400°C. The powder has the low melt viscosity and friability of a thermoset powder but is converted at high fusing temperatures to a tough coating having the good impact resistance and good elongation of a thermoplastic powder. The oligomer is a polyester, polycarbonate, polyamide, polyimide, polyamideimide. The article may be coated electrostatically or in a fluidized bed.

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