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Coating composition

A composition and coating technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of high cost, troublesome price, environmental pollution, etc., and achieve the effect of improving influence, solving environmental problems, optimizing chemical resistance and mechanical properties

Active Publication Date: 2021-04-02
KCC CORP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following problems, that is, whenever the decal is replaced, it is troublesome and expensive to reprint each time.
In addition to stickers and paper, there is also a method of printing decals on the outside of the container using oil-based paint, however, in the case of using oil-based paint, volatile organic solvents (VOC) are generated, resulting in environmental pollution

Method used

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  • Coating composition
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to Embodiment 14

[0079] Coating compositions were prepared by blending the compositions shown in Table 1 and Table 2 below by the following method.

[0080] After addition of DIW, dispersant, antifoam, thickener, the mixture was stirred for 30 minutes. After adding the pH adjuster to the stirred liquid phase, the mixture was stirred for an additional 30 minutes. After mixing is complete, add color to make a premix. After the premix liquid was added to the disperser, dispersion was performed for 1 hour, and the dispersion was completed until the particle diameter of the dispersion reached 25 μm.

[0081] The dispersion was stirred at low speed and the acrylic resin emulsion was added thereto, followed by stirring for 30 minutes. After completion of stirring, solvent, antifoaming agent, wetting agent and preservative were added respectively, and viscosity was measured after completion of mixing, and finally a thickener was added to adjust viscosity to prepare a coating composition.

[0082] T...

experiment example

[0103] The coating compositions obtained in Examples 1 to 14 and Comparative Examples 1 to 4 were dried at room temperature for 1 hour and then immersed in water, then, the appearance evaluation after 48 hours was performed by the following evaluation method, and its The results are shown in Table 4 and Table 5.

[0104] VOC evaluation

[0105] Evaluation was performed by "100-non-volatile matter content (weight%)-moisture content (weight%)".

[0106] viscosity

[0107] The run-off time (in seconds) until the coating composition is run out is measured using a Zahn cup #3.

[0108] storage stability

[0109] The state and viscosity of the coating composition in the container after storage was visually evaluated to determine whether there was a significant difference in coating workability and appearance of the coating compared to before storage.

[0110] (◎: Excellent, ○: Good, X: Bad)

[0111] Coating thickness

[0112] Measured by coating film Gauge (ELCOMETER A456C). ...

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PUM

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Abstract

The present invention provides a coating composition comprising: a first acrylic resin emulsion comprising units derived from a hydroxyl group-containing acrylic monomer; and a second acrylic resin emulsion including a unit derived from an acrylic monomer containing an amino group or an acylamino group, in which a weight ratio of the first acrylic resin emulsion to the second acrylic resin emulsion is 0.5: 1 to 8: 1.

Description

technical field [0001] The present invention relates to coating compositions. Background technique [0002] The decal coating for container coating needs to form a uniform coating film on the outside and inside of the structure under the general environment of the winter temperature of about 5°C to the summer temperature of about 40°C without using a special drying device . [0003] In this regard, in order to prevent the coating film from becoming sticky in hot and humid summer, the glass transition temperature (Tg) of the emulsion resin is at least 20°C, and at the same time, due to the Minimum Film Forming Temperature (MFFT) When coating in winter below the glass transition temperature (Tg), in order to prevent the cracking of the coating film, when preparing the coating, usually add more than a specified amount of volatile organic compounds (VOC, Volatile Organic Compounds). [0004] On the other hand, in order to identify each container, an identification sheet called...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D133/24C09D5/08C09D7/20
CPCC09D133/04C09D133/14C09D133/24C09D5/08C09D7/20C08L33/14C08L1/284C08L33/24C08L33/04C09D5/022
Inventor 张景浩金玄洙黄柄镇李秉学李应珉李贤东黄明顺李永德
Owner KCC CORP CO LTD