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Aqueous normal temperature curing peelable paint and preparation method of paint

A room temperature curing, water-based technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor barrier performance of single-component film-forming materials and poor environmental performance of solvent-based peelable and sealed coatings. Good peelability, moderate matrix adhesion, easy peeling effect

Active Publication Date: 2012-12-19
合肥华清高科表面技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Throughout the development of peelable and sealed films, the above two kinds of peelable coatings are mainly single-layer films, and the barrier properties of single-component film-forming materials are not very good. The environmental performance of solvent-based peelable and sealed coatings not good

Method used

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  • Aqueous normal temperature curing peelable paint and preparation method of paint
  • Aqueous normal temperature curing peelable paint and preparation method of paint
  • Aqueous normal temperature curing peelable paint and preparation method of paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A water-based room temperature curing peelable coating is composed of the following raw materials in weight ratio:

[0026]

[0027]

[0028] Wherein, the wetting and dispersing agent is an anionic multifunctional polymer alkoxide ammonium salt solution.

[0029] Polyurethane emulsion contains carboxyl group or sulfonate chain extension to introduce carboxyl group or sulfonate ion anion type, solid content is 50±1%, pH value is 7.5±0.5, emulsion particle size is not more than 200nm, glass transition temperature range -25~- 5°C.

[0030] The nano-scale filler is nano-calcium carbonate with an average particle size of 40nm, the defoamer is a mixture of silicone-free hydrophobic solid and foam-breaking polymer, and the leveling agent is polyether-modified polydimethylsiloxane Copolymer solvent, thickener is modified urea polyurethane solution.

[0031] The preparation method of water-based room temperature curing peelable coating, the steps are as follows:

[0032...

Embodiment 2

[0034] A water-based room temperature curing peelable coating is composed of the following raw materials in weight ratio:

[0035]

[0036]

[0037] Wherein, the wetting and dispersing agent is acrylate copolymer ammonium salt solution.

[0038] Polyurethane emulsion, nano filler, defoamer, leveling agent and thickener are the same as in Example 1.

[0039] The preparation method of water-based room temperature curing peelable coating, the steps are as follows:

[0040] Under the condition of stirring at 1500rpm, add nano-scale fillers to the polyurethane emulsion with wetting and dispersing agent, disperse for 2 hours with a sand mill, disperse, and stir multipurpose machine, then add defoamer, leveling agent and thickener in sequence, and disperse Serve evenly.

Embodiment 3

[0042] A water-based room temperature curing peelable coating is composed of the following raw materials in weight ratio:

[0043]

[0044] Wherein, the wetting and dispersing agent is an anionic polyfunctional polymer alkoxide ammonium salt solution and an acrylate copolymer ammonium salt solution, and the weight ratio of the two is 1:1.

[0045] Polyurethane emulsion, nano filler, defoamer, leveling agent and thickener are the same as in Example 1.

[0046] The preparation method of water-based room temperature curing peelable coating, the steps are as follows:

[0047] Under the condition of stirring at 1300rpm, add nano-scale fillers to the polyurethane emulsion with wetting and dispersing agent, disperse for 2.2 hours with a sand mill, disperse, and stir multipurpose machine, and then add defoamer, leveling agent and thickener in sequence, Get it after it is evenly dispersed.

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Abstract

The invention discloses aqueous normal temperature curing peelable paint, which is applicable to the technical field of metal surface treatment and consists of the following ingredients in parts by weight: 80 to 90 parts of polyurethane emulsion, 8 to 12 parts of wetting dispersing agents, 2 to 3 parts of nanometer level filling materials, 0.5 to 0.8 parts of defoaming agents, 0.5 to 0.8 parts of flatting agents and 0.5 to 0.8 parts of thickening agents. The aqueous normal temperature curing peelable paint has the advantages that on the basis of the polyurethane emulsion film forming mechanism, through major ingredient screening and compounding of polyurethane emulsion, other film forming auxiliary agents and the like, the aqueous normal temperature curing peelable paint adopting the polyurethane emulsion as major film forming agents is developed. The product has the characteristics that nontoxicity and harmlessness are realized, the pollution is avoided, the operation is simple, the raw material resources are wide, the price is low, the clean production is realized, and the like.

Description

technical field [0001] The invention discloses a water-based room-temperature-curable strippable coating, which is suitable for the technical field of metal surface treatment. Background technique [0002] The strippable sealing coating is a protection or sealing technology emerging in the 1940s, which can be applied to the fields of metal surface treatment, instrument equipment sealing and protection, etc. Generally speaking, it is a protective layer prepared from components such as film formers, corrosion inhibitors, plasticizers, and solvents. It is applied to the surface of the article by spraying, brushing, and dipping to form a layer of structure. Dense protective layer. In addition to preventing moisture and air from penetrating into the surface of the article, this protective layer has a composite protective effect of corrosion inhibitor. In addition, because the coating is soft and elastic, it can withstand mechanical impact and friction during handling. When coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C09D5/20
Inventor 刘万青
Owner 合肥华清高科表面技术股份有限公司
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