Anticorrosion coating composition, an anticorrosion film and an anticorrosive article

1. An anticorrosion film comprising, as a weight percent of solids based on the total weight of solids:

(a) 1-35% by weight of one or more fluoropolymer;

(b) 1-70% by weight of one or more epoxy resin;

(c) 5-70% by weight of one or more polyamideimide; and

(d) 1-40% by weight of an auxiliary binder consisting of one or more of polyethersulfone, polyphenylene sulfide, polyamide, polyimide, polyether ether ketone, polyetherimide, polyurethane, alkyd resin, polyester, or acrylic polymers.

2. The anticorrosion film of claim 1 , wherein the fluoropolymer is one of: polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkylvinylether copolymer, ethylene-tetrafluoroethylene copolymer, polyvinyl fluoride, polyvinylidene fluoride, polyhexafluoropropylene, ethylene-hexafluoropropylene copolymer, ethylene-vinyl fluoride copolymer, or any combination thereof.

3. The anticorrosion film of claim 1 , wherein the acrylic polymer comprises polymerized units of (meth)acrylic acid, or C 1-8 alkyl(meth)acrylate, or a combination thereof.

4. The anticorrosion film of claim 1 , comprising, as a weight percent of solids based on the total weight of solids:

3-35% by weight of one or more fluoropolymer;

2-60% by weight of one or more epoxy resin;

6-55% by weight of one or more polyamideimide; and

7-40% by weight of an auxiliary binder consisting of one or more of polyethersulfone, polyphenylene sulfide, polyamide, polyimide, polyether ether ketone, polyetherimide, polyurethane, alkyd resin, polyester, or acrylic polymers.

5. The anticorrosion film of claim 1 , comprising, as a weight percent of solids based on the total weight of solids:

8-35% by weight of one or more fluoropolymer;

15-70% by weight of one or more epoxy resin;

6-17% by weight of one or more polyamideimide; and

5-35% by weight of an auxiliary binder consisting of one or more of polyethersulfone, polyphenylene sulfide, polyamide, polyimide, polyether ether ketone, polyetherimide, polyurethane, alkyd resin, polyester, or acrylic polymers.

6. The anticorrosion film of claim 1 , comprising, as a weight percent of solids based on the total weight of solids:

10-35% by weight of one or more fluoropolymer;

1-15% by weight of one or more epoxy resin;

17-55% by weight of one or more polyamideimide; and

8-34% by weight of an auxiliary binder consisting of one or more of polyethersulfone, polyphenylene sulfide, polyamide, polyimide, polyether ether ketone, polyetherimide, polyurethane, alkyd resin, polyester, or acrylic polymers.

7. The anticorrosion film of claim 1 , further comprising:

1-15% by weight of one or more colorant, pigment or dye; and

0.5-4% by weight of one or more hard fillers.

8. The anticorrosion film of claim 7 , wherein the hard filler is a particulate filler having an average particle size of 1-100 microns and is selected from the group consisting of alumina, silicon carbide, zirconia and sheet-metal.

9. A coating composition comprising, as a weight percent of solids based on the total weight of solids:

(a) 1-35% by weight of one or more fluoropolymer;

(b) 1-70% by weight of one or more epoxy resin;

(c) 5-70% by weight of one or more polyamideimide;

(d) 1-40% by weight of an auxiliary binder consisting of one or more of polyethersulfone, polyphenylene sulfide, polyamide, polyimide, polyether ether ketone, polyetherimide, polyurethane, alkyd resin, polyester, or acrylic polymers; and a solubly or dispersibly effective amount of solvent.

10. The coating composition of claim 9 , wherein the fluoropolymer is selected from the group consisting of polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkylvinylether copolymer, ethylene-tetrafluoroethylene copolymer, polyvinyl fluoride, polyvinylidene fluoride, polyhexafluoropropylene, ethylene-hexafluoropropylene copolymer, ethylene-vinyl fluoride copolymer, or any combination thereof.

11. The coating composition of claim 9 , comprising, as a weight percent of solids based on the total weight of solids:

3-35% by weight of one or more fluoropolymer;

2-60% by weight of one or more epoxy resin;

6-55% by weight of one or more polyamideimide;

7-40% by weight of an auxiliary binder consisting of one or more of polyethersulfone, polyphenylene sulfide, polyamide, polyimide, polyether ether ketone, polyetherimide, polyurethane, alkyd resin, polyester, or acrylic polymers; and

solubly or dispersibly effective amount of solvent.

12. The coating composition of claim 9 , comprising, as a weight percent of solids based on the total weight of solids:

8-35% by weight of one or more fluoropolymer;

15-70% by weight of one or more epoxy resin;

6-17% by weight of one or more polyamideimide;

5-35% by weight of an auxiliary binder consisting of one or more of polyethersulfone, polyphenylene sulfide, polyamide, polyimide, polyether ether ketone, polyetherimide, polyurethane, alkyd resin, polyester, or acrylic polymers; and

solubly or dispersibly effective amount of a solvent mixture comprising water and non-aqueous solvent.

13. The coating composition of claim 9 , comprising, as a weight percent of solids based on the total weight of solids:

10-35% by weight of one or more fluoropolymer;

1-15% by weight of one or more epoxy resin;

17-55% by weight of one or more polyamideimide;

8-34% by weight of an auxiliary binder consisting of one or more of polyethersulfone, polyphenylene sulfide, polyamide, polyimide, polyether ether ketone, polyetherimide, polyurethane, alkyd resin, polyester, or acrylic polymers; and

a solubly or dispersibly effective amount of non-aqueous solvent.

14. The coating composition of claim 9 , further comprising:

1-15% by weight of one or more colorant, pigment or dye; and

0.5-4% by weight of one or more hard fillers.

15. The coating composition of claim 14 , wherein the hard filler is a particulate filler having an average particle size of 1-100 microns and is selected from the group consisting of alumina, silicon carbide, zirconia and sheet-metal.

16. An article comprising:

(a) a substrate and

(b) the anticorrosion film of claim 1 disposed on said substrate.