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Tailor‐made UV‐curable powder clear coatings for metal applications
Author(s) -
Wenning Andreas
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200209)187:1<597::aid-masy597>3.0.co;2-e
Subject(s) - materials science , coating , environmentally friendly , curing (chemistry) , composite material , uv curing , polyester , gloss (optics) , powder coating , amorphous solid , organic chemistry , ecology , chemistry , biology
UV‐curable powder coatings combine most of the benefits of conventional powder coatings together with the advantages of radiation‐curable liquid coatings. This new coating process is not only environmentally friendly. It can also be used to coat substrates like wood, plastic, glass or metal at low temperatures within a short curing time. Several coatings based on binders like urethane vinylethers/unsaturated polyesters or methacrylates are developed for metals, wood or pvc flooring. This paper describes urethane acrylates as a new resin system for UV‐curable powder clear coatings. The binders can be amorphous or (semi)crystalline. By combining both types it is possible to get tailor‐made binders which exhibit an unique coating performance of excellent adhesion, good flexibility and high hardness on metal substrates. The appearance of the clear coatings can be varied from high to low translucent. In addition, the coatings show a good weatherability.