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US 12,173,183 B2Granted
Metal packaging powder coating compositions, coated metal substrates, and methods
AssigneeSwimc LLC
InventorsRichard D. Joslin, Charles I. Skillman, Joseph Desousa
Life of this patent
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Abstract
Powder coating compositions, particularly metal packaging powder coating compositions, coated metal substrates, and methods; wherein the powder coating compositions include powder polymer particles comprising a polymer having a number average molecular weight of at least 2000 Daltons, wherein the powder polymer particles have a particle size distribution having a D50 of less than 25 microns; and, in certain embodiments, one or more charge control agents in contact with the powder polymer particles.
Claims31
A method comprising:
- causing a metal packaging powder coating composition to be directed to at least a portion of a metal substrate to provide a hardened continuous adherent coating on at least a portion of the metal substrate;
- wherein the powder coating composition comprises chemically produced powder polymer particles and magnetic carrier particles;
- wherein the powder polymer particles comprise a polymer having a number average molecular weight of at least 2000 Daltons, and wherein the powder polymer particles have a particle size distribution having a D50 of less than 20 microns;
- wherein the metal substrate is a metal substrate for forming metal packaging and has an average thickness of up to 635 microns;
- and
- wherein the hardened continuous adherent coating has an average thickness of up to 100 microns.
3 more elements
A method comprising:
- causing a metal packaging powder coating composition to be directed to at least a portion of a metal substrate to provide a hardened continuous adherent coating on at least a portion of the metal substrate;
- wherein the powder coating composition comprises chemically produced powder polymer particles and magnetic carrier particles;
- wherein the powder polymer particles comprise a polymer having a number average molecular weight of at least 2000 Daltons, and wherein the powder polymer particles have a particle size distribution having a D50 of less than 20 microns;
- wherein the magnetic carrier particles are not transferred to the metal substrate, and wherein the metal substrate is a metal substrate for forming a food, beverage, or aerosol container, a portion thereof, or a metal closure, and has an average thickness of up to 635 microns;
- and
- wherein the hardened continuous adherent coating has an average thickness of up to 100 microns.
3 more elements
A method of making metal packaging, the method comprising:
- causing a metal substrate having a hardened continuous adherent coating disposed on at least a portion of a surface thereof to be formed into at least a portion of a metal packaging container, a portion thereof, or a metal closure;
- wherein the metal substrate has an average thickness of up to 635 microns;
- and
- wherein the hardened continuous adherent coating is formed from a metal packaging powder coating composition;
- wherein the metal packaging powder coating composition comprises magnetic carrier particles and chemically produced powder polymer particles;
- wherein the powder polymer particles comprise a polymer having a number average molecular weight of at least 2000 Daltons, and wherein the powder polymer particles have a particle size distribution having a D50 of less than 20 microns.
3 more elements
Dependencies are inferred from the claim text.