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Aqueous coating combination and automobile intermediate coating thereof

A technology of water-based coatings and compositions, applied in coatings, polyester coatings, etc., can solve problems such as poor stone chip resistance, no instructions for use by the inventor, and increased pressure

Active Publication Date: 2013-05-15
NIPPON PAINT CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN 1306055A, CN1306056A uses saturated polyester resin and isocyanate resin as the invention of the matrix to obtain water-based coatings that can be used for auto parts, but no instructions on the use of the car body by the inventor have been found
For water-based coatings with high stone chip performance requirements, the general use of water-based isocyanate will intensify the cost pressure
[0007] 2. Poor stone impact resistance
[0009] 3. The baking temperature is too high
[0010] The domestic water-based intermediate coating generally adopts a baking temperature of 150°C, which is higher than that of solvent-based coatings, which leads to an increase in energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0062] Water-soluble polyester resin 3-10% (by weight, the same below)

[0063] Emulsion polyester resin 20-45%

[0064] Full methyl etherified amino resin 1~2%

[0065] High imine amino resin 7~15%

[0066] Dispersant 0.3~1%

[0067] Substrate wetting agent 1 0.5~1%

[0068] Substrate wetting agent 2 0.2~0.5%

[0069] Co-solvent 1 0~1%

[0070] Cosolvent 2 1~2%

[0071] Amine neutralizer 0~0.5%

[0072] Defoamer 0.5~1%

[0073] Titanium dioxide 20~40%

[0074] Precipitated barium sulfate 10~20%

[0075] carbon black trace

[0076] Thixotropic agent 0~0.6%

[0077] Automotive Intermediate Coating

[0078] The present invention also provides an automotive intermediate coating obtained by coating the aqueous coating composition.

[0079] The composition obtained by the invention has better stability, and various performances can reach the performances required by the current solvent-based coatings. Compared with the water-based automobile intermediate coating curre...

preparation Embodiment 1

[0122] (1) Mix the following components (the following components are all in parts by weight):

[0123] Bayhydrol D 270 3

[0124] Cymel 285-100 2

[0125] Disperbyk 180 1

[0126] Tego wet 500 1

[0127] Diethylene glycol methyl ether 1

[0128] Propylene glycol n-butyl ether 2

[0129] Triethylamine 0.2

[0130] BYK-024 0.5

[0131] TI-PURE R-960 20

[0132] Sachleben Micro 10

[0133] MITSUBISHI CARBON BLACK MA-100 0.2

[0134] Bentone 38 0.6

[0135] Deionized water 10

[0136] The above components are dispersed at a high speed to a dispersion with a fineness of 15um.

[0137] (2) Add the following components:

[0138] Watersol NP-5300 45

[0139] Cymel-325 10

[0140] Tego wet 280 0.5

[0141] Deionized water 5

[0142] Triethylamine 0.1

[0143] The pH value is 8.2 and the viscosity is 60s.

preparation Embodiment 2

[0145] (1) Mix the following components (the following components are all in parts by weight):

[0146] Bayhydrol D 270 10

[0147] Cymel 285-100 2

[0148] Disperbyk 180 1

[0149] Tego wet 500 1

[0150] Diethylene glycol methyl ether 1

[0151] Propylene glycol n-butyl ether 2

[0152] Triethylamine 0.2

[0153] BYK-024 0.5

[0154] Tipure R-960 20

[0155] Sachleben Micro 10

[0156] MITSUBISHI CARBON BLACK MA-100 0.2

[0157] Bentone 38 0.6

[0158] Deionized water 10

[0159] The above components are dispersed at a high speed to a dispersion with a fineness of 15um.

[0160] (2) Add the following components:

[0161] Watersol NP-5300 30

[0162] Cymel-325 10

[0163] Tego wet-280 0.5

[0164] Deionized water 5

[0165] Triethylamine 0.1

[0166] The pH value is 8.2 and the viscosity is 60s.

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Abstract

The invention provides an aqueous coating combination, which comprises the following ingredients: (a) base materials, containing, by weight, 3 to 10 parts of water-soluble polyester resin, 20 to 45 parts of emulsive polyester resin, 7 to 15 parts of preimino amino resin and 1 to 2 parts of premethylate amino resin or combination thereof; (b) 10 to 60 parts by weight of pigments and filling materials; and (c) polymer science acceptable paint auxiliary agents. The invention also provides the automobile intermediate coating containing the aqueous coating combination. The invention provides an aqueous coating combination which has the advantages of high stone-beating resistant performance, lower baking temperature, lower cost and environmental protection, and an automobile intermediate coating.

Description

technical field [0001] The invention relates to a coating composition, in particular to a water-based coating composition. Background technique [0002] At present, the following steps are required for general automobile painting: pre-treatment, electrophoresis, mid-coat (usually surfacer), top coat and clear coat. In addition to the pre-treatment and electrophoresis, the coatings used in the current automobile painting (especially domestic automobile manufacturers) are basically water-based, and the other coatings are also solvent-based coatings. The large amount of solvent emissions caused by the solvent contained in solvent-based coatings will cause serious environmental pollution. When all aspects are concerned about VOC emissions, automotive coatings must be water-based. [0003] Chinese patents CN 1306055A and CN1306056A use saturated polyester resin and isocyanate resin as the invention of the matrix to obtain water-based coatings that can be used for auto parts, bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/00C09D161/28C09D5/00
Inventor 刘炳权吴广士方黎明
Owner NIPPON PAINT CHINA
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