1. An article comprising:
a body portion or an end portion of a food or beverage can comprising a metal substrate; and
a coating composition disposed thereon, wherein the coating composition includes an emulsion polymerized latex polymer, and wherein the emulsion polymerized latex polymer comprises a reaction product of an ethylenically unsaturated monomer component polymerized in the presence of an aqueous dispersion of a polyurethane resin.
2. The article of claim 1, wherein the article comprises a 2-piece drawn food can body, a 3-piece food can body, a food can end, a drawn and ironed can body, a beverage can body, or a beverage can end.
3. The article of claim 1, wherein the polyurethane resin includes anionic salt groups, cationic salt groups, or a combination thereof.
4. The article of claim 1, wherein the polyurethane resin comprises a salt of an acid- or anhydride-functional polyurethane resin.
5. The article of claim 1, wherein the polyurethane resin comprises a salt of an acid- or anhydride-functional polyurethane resin and an amine.
6. The article of claim 1, wherein the polyurethane resin has a number average molecular weight of 1,500 to 50,000.
7. The article of claim 1, wherein the polyurethane resin is present in an amount comprising at least 5 wt-%, based on the total weight of the ethylenically unsaturated monomer component and the polyurethane resin.
8. The article of claim 1, wherein the ethylenically unsaturated component comprises at least about 25 wt-% of the emulsion polymerized latex polymer, based on the total weight of the ethylenically unsaturated monomer component and the polyurethane resin.
9. The article of claim 1, wherein the ethylenically unsaturated monomer component is polymerized in the presence of the aqueous dispersion with a water-soluble free radical initiator at a temperature of 0\xb0 C. to 100\xb0 C.
10. The article of claim 9, wherein the free radical initiator comprises a redox initiator system.
11. The article of claim 1, wherein the ethylenically unsaturated component has a number average molecular weight of at least 100,000.
12. The article of claim 1, wherein the emulsion polymerized latex polymer is substantially free of bound bisphenol A and aromatic glycidyl ether compounds.
13. The article of claim 1, wherein the coating composition is present on a food-contact surface of the metal substrate.
14. The article of claim 1, wherein the coating composition, when present on a beverage can end at a dry film thickness of 7 milligrams per square inch, passes less than 10 milliamps of current after being exposed for 4 seconds to a room-temperature electrolyte solution containing 1% by weight of NaCl dissolved in water.
15. A method, comprising:
providing a coating composition including an emulsion polymerized latex polymer, wherein the emulsion polymerized latex polymer comprises a reaction product of an ethylenically unsaturated monomer component polymerized in the presence of an aqueous dispersion of a polyurethane resin; and
forming a food or beverage can or portion thereof from a metal substrate having the coating composition disposed on at least one surface.
16. A method, comprising:
providing a composition comprising an emulsion polymerized latex polymer, wherein the emulsion polymerized latex polymer comprises the reaction product of:
an aqueous dispersion of a salt of an acid- or anhydride-functional polyurethane resin and an amine; and
an ethylenically unsaturated monomer component;
wherein the ethylenically unsaturated monomer component is polymerized in the presence of the aqueous dispersion to form the emulsion polymerized latex polymer, which is substantially free of bound bisphenol A and aromatic glycidyl ether compounds; and
applying the composition comprising the emulsion polymerized latex polymer to a metal substrate prior to or after forming the metal substrate into a food or beverage can or portion thereof.
17. The method of claim 16, wherein the amine comprises a tertiary amine.
18. The method of claim 16, wherein the ethylenically unsaturated monomer component is polymerized in the presence of the aqueous dispersion with a water-soluble free radical initiator.
19. The method of claim 18, wherein the ethylenically unsaturated monomer component is batch polymerized in the presence of the aqueous dispersion.
20. The method of claim 16, wherein the polyurethane resin is present in an amount from at least 5 wt-% to no greater than 95 wt-%, based on the total weight of the ethylenically unsaturated monomer component and the polyurethane resin.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A staple cartridge comprising:
a cartridge main body;
a staple strike out portion;
a connected staple containing portion provided on one end side;
a staple strike out portion provided on the other end side;
a guide portion for guiding connected staples at inside of the connected staple containing portion to the staple strike out portion;
a first actuator capable of entering and exiting to and from the guide portion; and
a second actuator capable of entering and exiting to and from an inside of the connected staple containing portion;
wherein the first actuator and the second actuator are interlocked,
wherein the connected staple containing portion contains a refill that contains connected staples inside thereof and is interchangeably attached to the cartridge main body, and
the second actuator is capable of entering and exiting to and from the inside of the refill.
2. The staple cartridge according to claim 1, wherein the cartridge main body is attached and detached to and from the stapler main body,
the first actuator is operated in accordance with a presenceabsence of the connected staples at an inside of the guide portion, and
the second actuator is operated in accordance with a presenceabsence of the connected staples at the inside of the connected staple containing portion.
3. The staple cartridge according to claim 2, wherein the second actuator is pivoted around a second middle portion,
the first actuator is pivoted around a first middle portion,
the first actuator and the second actuator are aligned in series, and
respective end portions of the first actuator and the second actuator contiguous to each other are connected to be engaged such that by pivoting one thereof, the other thereof is interlocked.
4. A staple cartridge comprising:
a cartridge main body;
a staple strike out portion;
a connected staple containing portion provided on one end side;
a staple strike out portion provided on the other end side;
a guide portion for guiding connected staples at inside of the connected staple containing portion to the staple strike out portion;
a first actuator capable of entering and exiting to and from the guide portion; and
a second actuator capable of entering and exiting to and from an inside of the connected staple containing portion;
wherein the first actuator and the second actuator are interlocked,
wherein the second actuator is pivoted around a second middle portion,
the first actuator is pivoted around a first middle portion,
the first actuator and the second actuator are aligned in series, and
respective end portions of the first actuator and the second actuator contiguous to each other are connected to be engaged such that by pivoting one thereof, the other thereof is interlocked.
5. A staple cartridge comprising:
a cartridge main body;
a connected staple containing portion provided on one end side;
a staple strike out portion provided on the other end side;
a guide portion for guiding connected staples at inside of the connected staple containing portion to the staple strike out portion;
a first actuator capable of entering and exiting to and from the guide portion; and
a second actuator capable of entering and exiting to and from an inside of the connected staple containing portion;
wherein the first actuator and the second actuator are interlocked,
the second actuator is pivoted around a second middle portion,
the first actuator is pivoted around a first middle portion,
the first actuator and the second actuator are aligned in series,
respective end portions of the first actuator and the second actuator contiguous to each other are connected to be engaged such that by pivoting one thereof, the other thereof is interlocked; and
connected staples contained in the staple cartridge.
6. A staple cartridge comprising:
a cartridge main body;
a connected staple containing portion provided on one end side;
a staple strike out portion provided on the other end side;
a guide portion for guiding connected staples at inside of the connected staple containing portion to the staple strike out portion;
a first actuator capable of entering and exiting to and from the guide portion; and
a second actuator capable of entering and exiting to and from an inside of the connected staple containing portion;
wherein the first actuator and the second actuator are interlocked,
the second actuator is pivoted around a second middle portion,
the first actuator is pivoted around a first middle portion,
the first actuator and the second actuator are aligned in series,
respective end portions of the first actuator and the second actuator contiguous to each other are connected to be engaged such that by pivoting one thereof, the other thereof is interlocked; and
a refill contained in the staple cartridge.
7. A staple cartridge comprising:
a cartridge main body;
a connected staple containing portion provided on one end side;
a staple strike out portion provided on the other end side;
a guide portion for guiding connected staples at inside of the connected staple containing portion to the staple strike out portion;
a first actuator capable of entering and exiting to and from the guide portion; and
a second actuator capable of entering and exiting to and from an inside of the connected staple containing portion;
wherein the first actuator and the second actuator are interlocked,
the second actuator is pivoted around a second middle portion,
the first actuator is pivoted around a first middle portion,
the first actuator and the second actuator are aligned in series,
respective end portions of the first actuator and the second actuator contiguous to each other are connected to be engaged such that by pivoting one thereof, the other thereof is interlocked; and
connected staples contained in a refill.