Direct-to-metal coating composition

Patent metadata

Field	Value
Publication number	US-2018282554-A1
Application number	US-201815945111-A
Country	US
Kind code	A1
Filing date	Apr 4, 2018
Priority date	Apr 4, 2017
Publication date	Oct 4, 2018
Grant date	—

Abstract

A fast drying, heavy metal-free, high performance coating composition with outstanding UV resistance, and excellent corrosion resistance coupled with fast dry and long pot life. This coating can be applied over DTM, such as blasted cold rolled steel, or treated cold rolled steel, aluminum and treated aluminum. High corrosion resistance without sacrificing gloss or UV resistance achieved by selecting proper pigments and proper pigment design and packing by advantageously utilizing differing pigment morphologies (sizes and shape).

First claim

What is claimed is:

1 . A coating composition comprising: (a) a binder resin system; (b) a crosslinker resin; (c) a plurality of specialty pigments having pigment particles of various morphologies; and (d) a corrosion inhibiting pigment.

2 . The composition of claim 1 , further comprising a color pigment.

3 . The composition of claim 1 , wherein the specialty pigments are selected from a group consisting of filler pigments and extender pigments.

4 . The composition of claim 1 , wherein the pigment volume concentration of the composition is between 10 to 80%.

5 . The composition of claim 1 , wherein the pigment volume concentration of the composition is between 20 to 60%.

6 . The composition of claim 1 , wherein the pigment volume concentration of the composition is between 25 to 45%.

7 . The composition of claim 1 , wherein the corrosion inhibiting pigment comprises at least one non-toxic environmental friendly micronized cation-containing pigment.

8 . The composition of claim 1 , wherein the corrosion inhibiting pigment is between 1 to 30 wt %, based on the total weight of the coating composition.

9 . The composition of claim 1 , wherein the corrosion inhibiting pigment is between 2 to 20 weight percent based on the total weight of the coating composition.

10 . The composition of claim 1 , wherein the corrosion inhibiting pigment is between 3 wt % to 15 wt %, based on the total weight of the coating composition.

11 . The composition of claim 1 , wherein the corrosion inhibiting pigment comprises at least one micronized anodic passivating pigment.

12 . The composition of claim 11 , wherein the micronized anodic passivating pigment is between 1 to 30 wt %, preferably between 2 wt % to 20 wt %, most preferably between 3 wt % to 15 wt %, based on the total weight of the coating composition.

13 . The composition of claim 11 , wherein the micronized anodic passivating pigment is between 2 wt % to 20 wt %, based on the total weight of the coating composition.

14 . The composition of claim 11 , wherein the micronized anodic passivating pigment is between 3 wt % to 15 wt %, based on the total weight of the coating composition.

15 . The composition of claim 2 , wherein the color pigments comprise at least one organic or inorganic color pigment between 0.5 to 30 wt %, based on the total weight of the coating composition.

16 . The composition of claim 1 , wherein the specialty pigments comprise at least three or more specialty extender pigments having differing particle sizes and shapes.

17 . The composition of claim 1 , wherein the specialty pigments comprise: (a) at least one spherical shaped pigment; (b) at least one acicular shaped pigment; and (c) at least one platy shaped pigment.

18 . The composition of claim 1 , wherein the specialty pigments comprise: (a) between 5 to 50 wt %, spherical shaped pigment ; (b) between 2 to 30 wt acicular shaped pigment; and (c) between 1 to 30 wt % platy-shaped pigment.

19 . The composition of claim 1 , wherein the specialty pigments comprise: (a) between 10 to 30 wt %, spherical shaped pigment; (b) between 3 to 20 wt % acicular shaped pigment; and (c) between 3 to 20 wt % platy-shaped pigment.

20 . The composition of claim 1 , wherein the specialty pigments comprise: (a) between 15 to 25 wt % spherical shaped pigment; (b) between 4 to 12 wt % acicular shaped pigment; and (c) between 4 to 12 wt % platy-shaped pigment.

21 . The composition of claim 1 , wherein the specialty pigments comprise: (a) at least one spherical shaped pigment; (b) at least one acicular shaped pigment; and (c) at least one platy-shaped pigment; wherein said specialty pigments have median particle size between 0.1 to 20 μm.

22 . The composition of claim 1 , wherein the specialty pigments have median particle size between 0.1 to 10 μm.

23 . The composition of claim 1 , wherein the specialty pigments have median particle size between 0.3 to 6 μm.

24 . The composition of claim 1 , wherein the binder system comprises one or more resins selected from the group consisting of: (a) malonate-functional donor resin between 10 to 50 wt %; (b) one or more acrylic or polyester polyol resin between 10 to 50 wt %; and
(c) one or more aspartic ester resin between 10 to 50 wt %; and (d) one or more alkyd or modified alkyd resin between 10 to 50 wt %, based on the total weight of the coating composition.

25 . The composition of claim 1 , wherein the binder system comprises one or more resins selected from the group consisting of: (a) malonate-functional donor resin between 15 to 35 wt %; (b) one or more acrylic or polyester polyol resin between 15 to 40 wt %; and (c) one or more aspartic ester resin between 15 to 35 wt %; and (d) one or more alkyd or modified alkyd resin between 20 to 45 wt %, based on the total weight of the coating composition.

26 . The composition of claim 1 , wherein the binder system comprises one or more resins selected from the group consisting of: (a) malonate-functional donor resin between 20 to 35 wt %; (b) one or more acrylic or polyester polyol resin between 18 to 30 wt %; and (c) one or more aspartic ester resin between 20 to 25 wt %; and (d) one or more alkyd or modified alkyd resin between 30 to 35 wt %, based on the total weight of the coating composition.

27 . The composition of claim 1 , wherein the binder system comprises one or more malonate-functional resin between 10 to 50 wt %, and the crosslinker resin comprise of one or more acryloyl acceptor resin between 5 to 40 wt %, based on the total weight of the coating composition.

28 . The composition of claim 1 , wherein the binder system comprises one or more malonate-functional resin between 15 to 35 wt %, and the crosslinker resin comprises one or more acryloyl acceptor resin between 6 to 25 wt %, based on the total weight of the coating composition.

29 . The composition of claim 1 , wherein the binder system comprises one or more malonate-functional resin between 20 to 35 wt % and the crosslinker resin comprise of one or more acryloyl acceptor resin between 8 to 15 wt %, based on the total weight of the coating composition.

30 . The composition of claim 1 , wherein the binder system is selected from the group consisting of one or more acrylic resin, polyester polyol resin, and aspartic ester resin, and the crosslinker resin comprises one or more aliphatic isocyanate resin between 5 to 40 wt %.

31 . The composition of claim 1 , wherein the binder system is selected from the group consisting of one or more acrylic resin, polyester polyol resin, and aspartic ester resin, and the crosslinker resin comprises one or more aliphatic isocyanate resin between 8 to 25 wt %.

32 . The composition of claim 1 , wherein the binder system is selected from the group consisting of one or more acrylic resin, polyester polyol resin, and aspartic ester resin, and the crosslinker resin comprises one or more aliphatic isocyanate resin between 10 to 18 wt %.

33 . The composition of claim 1 , wherein the binder system comprises one or more cycloaliphatic epoxy resin between 10 to 50 wt %, and wherein the crosslinker system comprises one or more amines between 5 to 50 wt %, based on the total weight of the coating composition.

34 . The compos

Assignees

• Swimc Llc

Inventors

• Avudaiappan Sundaresan
• Novelli Wendy M
• Desai Ganesh S

Classifications

• C08K2003/2241

  Titanium dioxide · CPC title

• C09D7/68

  Particle size between 100-1000 nm · CPC title

• C09D175/02

  Polyureas · CPC title

• C08K9/02

  Ingredients treated with inorganic substances · CPC title

• C09D167/00

  Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain (based on polyester-amides C09D177/12; based on polyester-imides C09D179/08); Coating compositions based on derivatives of such polymers · CPC title