BLACK PAINT COMPOSITION

Abstract

Disclosed herein is a black paint composition with improved blackness by controlling a black paint and an additive.

Claims

1. A black paint composition, comprising: a base resin including an acrylic resin and a melamine resin; a black pigment; an additive; and a solvent, wherein the black pigment has a particle size of 80 nm or less.

2. The black paint composition of claim 1, wherein the acrylic resin includes one selected from the group consisting of methyl acrylate, ethyl acrylate, and a combination thereof.

3. The black paint composition of claim 1, wherein the black pigment includes one selected from the group consisting of carbon black, titanium black, acetylene black, aniline black, perylene black, and a combination thereof.

4. The black paint composition of claim 1, wherein the black pigment has the particle size ranging from 50 nm to 70 nm.

5. The black paint composition of claim 1, wherein the additive includes one selected from the group consisting of a dispersion stabilizer, a surface modifier, an anti-settling agent, a flow inhibitor, and a combination thereof.

6. The black paint composition of claim 5, wherein the dispersion stabilizer includes a polycarboxylic acid modified product; the surface modifier includes silicone-modified acryl; the anti-settling agent includes a benzophenol derivative; and the flow inhibitor includes at least one of an acrylic derivative and modified urethane.

7. The black paint composition of claim 1, wherein the solvent includes glycol, alcohol, and deionized water.

8. The black paint composition of claim 7, wherein the glycol includes one selected from the group consisting of ethylene glycol, propylene glycol, and a combination thereof; and wherein the alcohol includes one selected from the group consisting of methanol, ethanol, butanol, and a combination thereof.

9. The black paint composition of claim 1, wherein the black paint composition includes 35% to 50% by weight of the base resin, 1.0% to 2.0% by weight of the black pigment, 8.5% to 16% by weight of the additive, and 32% to 49% by weight of the solvent, based on a total weight of the black paint composition.

10. The black paint composition of claim 1, wherein the black paint composition includes 30% to 40% by weight of the acrylic resin, 5% to 10% by weight of the melamine resin, 1.0% to 2.0% by weight of the black pigment, 0.5% to 1.0% by weight of a dispersion stabilizer, 2.0% to 4.0% by weight of a surface modifier, 2.0% to 5.0% by weight of an anti-settling agent, 4.0% to 6.0% by weight of a flow inhibitor, and 32% to 49% by weight of the solvent, based on a total weight of the black paint composition.

11. The black paint composition of claim 1, wherein blackness of the black paint composition is 200 or more, adhesion of the black paint composition is 2.0 or less, water-resistant adhesion of the black paint composition is 2.0 or less, and accelerated weather resistance of the black paint composition is 2.0 or less.

Description

EXAMPLE 1 AND COMPARATIVE EXAMPLES 1 TO 4

[0052] Paint compositions were prepared as shown in Table 1 below.

TABLE-US-00001 TABLE 1 Comparative Comparative Comparative Comparative Components Example 1 Example 1 Example 2 Example 3 Example 4 Base Acrylic resin 35.9 36.2 35.4 36.3 35.7 Resin Melamine 7.5 7.6 7.2 7.6 7.4 resin Black Carbon black 0.0 1.3 3.5 0.0 0.0 Pigment (particle size: 150 nm) Carbon black 1.2 0.0 0.0 1.2 2.5 (particle size: 60 nm) Additive Dispersion 0.7 0.0 0.7 0.0 1.3 stabilizer (polycarboxylic acid modified product) Surface 3.2 3.2 3.2 3.2 3.2 modifier (silicone- modified acrylic) Anti-settling 3.9 3.9 3.9 3.9 3.9 agent (benzophenol derivative) Flow 5.0 5.0 4.8 5.0 5.0 inhibitor (acrylic derivative) Solvent Glycol 3.3 3.3 3.3 3.3 3.3 Alcohol 8.1 8.1 8.1 8.1 8.1 Deionized 31.2 31.4 29.9 31.4 29.7 water

Experimental Example

[0053] Blackness, adhesion, water-resistant adhesion, and accelerated weather resistance were measured with respect to the paint compositions of Example 1 and Comparative Examples 1 to 4 and were shown in Table 2.

TABLE-US-00002 TABLE 2 Required Comparative Comparative Comparative Comparative Components standard Example 1 Example 1 Example 2 Example 3 Example 4 Blackness 200 or more 210 185 194 191 232 (Mf) State M-2.5 or M-1.0 M-1.0 M-3.0 M-1.0 M-2.0 adhesion more Water- After water- M-1.0 M-1.0 M-5.0 M-1.5 M-4.0 resistant resistance adhesion (40° C. × 240 Hr), M-2.5 or more Accelerated After W-O- M-1.0 M-1.0 M-5.0 M-1.5 M-4.5 weather M 1000 hr, ΔE 0.5 ΔE 0.8 ΔE 1.5 ΔE 1.2 ΔE 1.3 resistance adhesion is M-2.5 or more and a color difference is ΔE 3 or less (Blackness measurement) L*, b*, and a* values are derived using Bykmac equipment of BYK Co. Blackness (Mf) = 100X[2-log(L* + b* − a*)] on the basis of DIN6174.

[0054] Referring to Table 2, it can be confirmed that Comparative Example 1 used a carbon black pigment having a large particle size and thus has low blackness as compared to Example 1. In addition, it can be confirmed that, in Comparative Example 2, the content of the pigment was increased so that the blackness was slightly increased, but the adhesion was poor due to the increment in content of the pigment when compared to Comparative Example 1. In Comparative Example 3, the carbon black pigment having a small particle size was used, but the dispersion stabilizer was not used so that it can be seen that agglomeration between some particles occurred and thus blackness improvement was insignificant. In Comparative Example 4, it can be confirmed that the blackness is most excellent but, since the contents of the carbon black pigment having a small particle size and the dispersion stabilizer are high, adhesion was degraded.

[0055] In accordance with various aspects of the present invention, a method of improving blackness of a paint without increasing a content of a black pigment can be provided.

[0056] The effects of the present invention are not limited to the above-described effects. It should be understood that the effects of the present invention include all effects which can be inferred from the above description.

[0057] The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the present invention and their practical application, to enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the present invention be defined by the Claims appended hereto and their equivalents.