Aqueous normal temperature curing peelable paint and preparation method of paint
A room temperature curing and coating technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor barrier performance of single-component film-forming materials, poor environmental performance of solvent-based peelable and sealed coatings, etc., to achieve Good stripping performance, moderate matrix bonding force, and uniform film formation
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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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