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Water-based bi-component polyurethane color paint

A two-component polyurethane and colored coating technology, applied in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc., can solve the problem of increasing volatile organic compounds, poor chemical resistance, environmental and human impact And other problems, to achieve the effect of increasing cross-linking density, good compatibility, improving water resistance and gloss

Active Publication Date: 2011-07-20
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the current water-based two-component polyurethane coatings are formulated, an appropriate amount of film-forming aids must be added, and the coating film has low hardness and poor chemical medium resistance.
Chinese invention patent application 20071014847475.5 discloses a waterborne two-component polyurethane colored coating and its preparation method. In order to disperse the pigments and fillers in the coating, a conventional pigment dispersant is used, which has a good effect on the gloss and chemical medium resistance of the coating film. Influence, and sometimes an appropriate amount of film-forming aids must be added to the coating, which will also increase the content of volatile organic compounds (VOC) in the coating, which will have an impact on the environment and the human body

Method used

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  • Water-based bi-component polyurethane color paint
  • Water-based bi-component polyurethane color paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0020] Embodiment 1~3 prepares the hydroxyl component of coating of the present invention

[0021] (1) Raw materials and specifications

[0022] 1. Acrylic hydroxyl emulsion: produced by CNOOC Changzhou Paint Chemical Research Institute, model HAE-120(s), the dispersed phase has a core-shell structure and the core-hard shell is soft, and the soft shell is a mixed single with a glass transition temperature of 0-5 °C The hard core is formed by mixed monomers with a glass transition temperature of 80-105°C, and the mass ratio of core / shell monomers is 1:1-1:3; the solid content of the emulsion is 43% by mass, and the hydroxyl content is 2.8 quality%;

[0023] 2. Dispersed resin: produced by CNOOC Changzhou Coating Chemical Research Institute, model AHF-100, with a solid content of 25% by mass and a hydroxyl content of 2.6% by mass;

[0024] 3. Pigment: Titanium dioxide, produced by DuPont Company of the United States, brand R-706; carbon black, produced by Degussa Company, bran...

Embodiment 1

[0054] The mass part ratio of embodiment 1 hydroxyl component and curing agent is 8: 1, the mass part ratio of embodiment 2 hydroxyl component and curing agent is 6: 1, the mass part ratio of embodiment 3 hydroxyl component and curing agent The ratio is 7: 1, and the mass part ratio of the hydroxyl group of comparative example 1 and comparative example 2 and curing agent is 8: 1, and the hydroxyl group of embodiment 1 ~ 3 and comparative example 1 ~ 2 are respectively prepared according to this ratio. The mixture was evenly mixed with the curing agent to prepare the coatings of Examples 1-3 and Comparative Examples 1-2 respectively.

[0055] The above-mentioned coatings were used to coat the samples respectively, and the performance of the coating film was tested after standing for 7 days under standard conditions. The test results are shown in Table 2.

[0056] Table 2

[0057]

[0058] Can illustrate by the result of table 2, coating (embodiment 1~3 coating) of the prese...

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PUM

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Abstract

The invention relates to water-based bi-component polyurethane color paint, comprising the following hydroxyl components by mass portions: 4-12 portions of water, 3-6 portions of dispersion resin, 2-30 portions of pigments, 0.1-0.5 portion of antifoaming agents, 50-90 portions of acrylic hydroxyl emulsion, 0.1-0.5 portion of wetting flatting agent, 0.1-0.3 portion of slipping agent, 0.1-0.5 portion of microbicide, and 0.1-1 portion of thickening agents; wherein the acrylic hydroxyl emulsion is a hardcore soft shell structure, the hydroxyl content is 2.5-3.0 by mass percentage, and the hydroxyls are primary hydroxyl groups and are uniformly distributed on a shell layer; when the emulsion is synthesized, the emulsifier is reactive type emulsifier; the curing agent is self-emulsifying aliphatic isocyanate with 100 of solid content by mass percentage in water; when in use, the hydroxyl components and the curing agents are mixed according to 6-8:1 by mass portion; the VOC content of the paint in the invention is far lower than that of the existing water-based bi-component polyurethane color paint, the rigidity and toughness of the coating are considered, and the invention has good wearing resistance and chemical resistance.

Description

technical field [0001] The invention relates to a water-based two-component polyurethane colored paint, which is used as a surface decoration and protection material for wood, metal, plastic and the like. Background technique [0002] With the improvement of laws and regulations in various countries around the world and the improvement of people's health awareness, the use of solvent-based coatings has become more and more restricted. In recent years, with the continuous rise of oil prices, the development of water-based coatings has been promoted. Solvent-based polyurethane coatings develop rapidly due to their excellent performance. However, compared with the excellent performance of solvent-based polyurethane coatings, the performance of water-based one-component polyurethane coatings is far behind. Water-based two-component polyurethane coatings use water-based isocyanate as a curing agent. After cross-linking and curing, the cross-linking density of the coating film is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/14C09D5/28
Inventor 史立平孔志元何庆迪殷武蔡青青
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST