C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 5/03 (2006.01) C09D 127/12 (2006.01) C09D 127/16 (2006.01) C09D 127/20 (2006.01) C09D 133/06 (2006.01) C08L 27/12 (2006.01) C08L 33/06 (2006.01)
Patent
CA 2041405
A pigmented powder coating composition comprises a resin component comprising (1) from about 50 wt.% to about 90 wt.% VDF/HFP copolymer resin having a melting point in the range of from 160°C to 170°C and a melt viscosity of from about 1 to about 4 kilopoise measured at 100 sec-1 and 232°C, and (2) from about 10 wt.% to about 50 wt.% of at least one thermoplastic acrylic resin; and a pigment component comprising from about 5 to about 30 parts of at least one pigment, per 100 parts by weight of the resin component. The powder coating composition is prepared by pelletizing the mixture components, cryogenically grinding the pellets, and classifying the particles. The composition is applied to a substrate, and subjected to heat treatment to form a coating. The coatings prepared in this manner are characterized by improved flexibility, crack resistance and surface smoothness.
Atofina Chemicals Inc.
Borden Ladner Gervais Llp
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