Methods of coating metal substrates and making metal packaging, coated metal substrates, metal packaging, and powder coating composition systems

Patent metadata

Field	Value
Publication number	US-2024286170-A1
Application number	US-202218289785-A
Country	US
Kind code	A1
Filing date	May 19, 2022
Priority date	May 19, 2021
Publication date	Aug 29, 2024
Grant date	—

Abstract

Methods of coating powder coating compositions, particularly metal packaging powder coating compositions, and methods of making a metal packaging container, a portion thereof, or a metal closure for a container, as well as coated substrates and metal packaging, and powder coating composition systems.

First claim

1 . A cartridge-based delivery system comprising:
a plurality of cartridges, wherein each cartridge of the plurality of cartridges comprises:
a body defining an enclosed volume containing a metal packaging powder coating composition;
a dispensing port arranged to provide a path for the metal packaging powder coating composition during dispensing of the metal packaging powder coating composition from the cartridge; and
an optional inlet port configured to allow makeup air to enter the enclosed volume as the metal packaging powder coating composition is dispensed from the dispensing port;
wherein the metal packaging powder coating composition comprises 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.

2 . The cartridge-based delivery system of claim 1 , wherein the enclosed volume of each cartridge of the plurality cartridges contains 0.001 cubic meter or more of the powder coating composition.

3 . The cartridge-based delivery system of claim 1 , wherein each cartridge comprises desiccant material exposed within the enclosed volume such that the makeup air passes through the desiccant material when entering the enclosed volume.

4 . The cartridge-based delivery system of claim 1 , wherein the powder polymer particles comprise powder polymer particles prepared by spray drying or limited coalescence.

5 . The cartridge-based delivery system of claim 1 , wherein the powder coating composition further comprises one or more charge control agents in contact with the powder polymer particles, and/or magnetic carrier particles, which may or may not be in contact with the powder polymer particles.

6 . A method of coating a metal substrate suitable for use in forming metal packaging, the method comprising:
providing a metal substrate; providing multiple metal packaging powder coating compositions, wherein at least two of the multiple metal packaging powder coating compositions are different; directing each of the multiple powder coating compositions to at least a portion of the metal substrate such that at least one powder coating composition is deposited on another different powder coating composition; and providing conditions effective for the multiple powder coating compositions to form a hardened continuous adherent coating on at least a portion of the metal substrate; wherein each metal packaging powder coating composition comprises 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.

7 . The method of claim 6 , wherein the powder polymer particles comprise powder polymer particles prepared by spray drying or limited coalescence.

00 . The method of claim 6 , wherein the powder coating composition further comprises one or more charge control agents in contact with the powder polymer particles, and/or magnetic carrier particles, which may or may not be in contact with the powder polymer particles.

9 . The method of claim 6 , wherein the method comprises electrically grounding the metal substrate while directing at least one powder coating composition of the multiple powder coating compositions to the at least a portion of the substrate.

10 . The method of claim 9 , wherein the method comprises electrostatically adhering at least one powder coating of the multiple powder coating compositions to a transporter surface, imaging member, and/or intermediate transfer member, before directing each of the multiple powder coating compositions to at least a portion of the metal substrate; wherein electrostatically adhering the at least one powder coating composition comprises electrically biasing the transporter surface, imaging member, and/or intermediate transfer member to a non-zero voltage before electrostatically adhering the at least one powder coating composition to the transporter surface, imaging member, and/or intermediate transfer member.

11 . The method of claim 10 , wherein a first deposited powder coating composition is at a first polarity, and the method further includes changing the first polarity of the first deposited powder coating composition to a second polarity, and applying a second coating composition at the second polarity to the first deposited powder coating composition.

12 . A method of coating a metal substrate suitable for use in forming metal packaging, the method comprising:
providing a metal substrate; providing a metal packaging powder coating composition, wherein the powder coating composition comprises powder polymer particles; selectively applying the powder coating composition on at least a portion of the metal substrate to form a patterned coating; and providing conditions effective for the powder coating composition to form a hardened adherent patterned coating on at least a portion of the metal substrate.

13 . The method of claim 12 , wherein the powder polymer particles comprise powder polymer particles prepared by spray drying or limited coalescence.

14 . The method of claim 12 , wherein the powder coating composition further comprises one or more charge control agents in contact with the powder polymer particles, and/or magnetic carrier particles, which may or may not be in contact with the powder polymer particles.

15 . The method of claim 12 , wherein the method comprises electrically grounding the metal substrate while selectively applying the powder coating composition on the at least a portion of the substrate.

16 . The method of claim 15 , wherein the method comprises electrostatically adhering at least one powder coating of the multiple powder coating compositions to a transporter surface, imaging member, and/or intermediate transfer member, before directing each of the multiple powder coating compositions to at least a portion of the metal substrate; wherein electrostatically adhering the at least one powder coating composition comprises electrically biasing the transporter surface, imaging member, and/or intermediate transfer member to a non-zero voltage before electrostatically adhering the at least one powder coating composition to the transporter surface, imaging member, and/or intermediate transfer member.

17 . A method of making metal packaging in one location and/or in one continuous manufacturing line or process, the method comprising:
providing a metal substrate; providing a metal packaging powder coating composition, wherein the powder coating composition comprises powder polymer particles; directing the powder coating composition to at least a portion of the metal substrate; providing conditions effective for the powder coating composition to form a hardened continuous adherent coating on at least a portion of the metal substrate; and forming the at least partially coated metal substrate into at least a portion of a metal packaging container, a portion thereof, or a metal closure.

18 . The method of claim 17 , wherein the powder polymer particles comprise powder polymer particles prepared by spray drying or limited coalescence.

19 . The method of claim 17 , wherein the powder coating composition further comprises one or more charge control agents in contact with the powder polymer particles, and/or magnetic carrier particles, which may or may not be in contact with the powder polymer particles.

20 . The met

Assignees

• Swimc Llc

Inventors

• Skillman Charles I
• Joslin Richard D
• Desousa Joseph
• Romagnoli Kevin M
• Stelter Eric Carl

Classifications

• G03G15/0865

  Arrangements for supplying new developer · CPC title

• G03G15/6585

  by using non-standard toners, e.g. transparent toner, gloss adding devices · CPC title

• G03G15/6594

  characterised by the format or the thickness, e.g. endless forms · CPC title

• G03G15/6591

  characterised by the recording material, e.g. plastic material, OHP, ceramics, tiles, textiles (details transferring the toner pattern onto particular materials G03G15/1625) · CPC title

• B05D7/53

  Base coat plus clear coat type · CPC title