US Patent:
20190276678, Sep 12, 2019
Inventors:
- Cleveland OH, US
Robert Cavlovich - Gibsonia PA, US
Anthony M. Chasser - Allison Park PA, US
Troy Larimer - North Huntingdon PA, US
Julia Pacilio - Cleveland OH, US
John Robert Schneider - Allison Park PA, US
Kathryn A. Shaffer - Bethel Park PA, US
International Classification:
C09D 5/03
C09D 177/06
C09D 127/06
C09D 123/26
C09D 133/12
C09D 167/00
C08J 3/12
C08J 3/00
Abstract:
A powder coating composition grindable at non-cryogenic temperatures includes: (a) a first polymer having a number average molecular weight (Mn) of more than 1,000 and a Tg of at least 40 C.; (b) a second polymer having a Tm of at least 100 C.; and optionally (c) a cross-linker. The first polymer and the second polymer are different from one another, and each of the first and second polymers have less than 25 wt % fluorine-containing monomeric units, with wt % based on the total weight of the monomeric units in each polymer. Upon grinding at a temperature above 4 C. the coating composition has an average particle size from 15 to 150 microns. Further coating compositions, methods of preparing coating compositions, coating systems, and substrates coated with a powder coating composition are also disclosed.