Quick-drying high-solid polyurea coating, its preparation method and application
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A high-solid, polyurea technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., to achieve the effects of reducing construction time, excellent mechanical properties, and improving construction production efficiency
Active Publication Date: 2020-01-10
BEIJING BSS CORROSION PROTECTION IND +1
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[0005] Polyaspartic polyurea coatings have been very successful, however, the problem with these coatings is that they must cure at an acceptable rate to achieve good adhesion to metal substrates and high performance
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[0068] According to a typical embodiment of the present invention, a method for preparing a quick-drying high-solid polyurea coating is provided. The preparation method comprises the following steps: 1) adding 5 to 15 parts of composite antirust pigment, 10 to 45 parts of pigment and filler, and 1 to 5 parts of auxiliary agent and part of the solvent, grind until the fineness reaches 20 microns, and the temperature reaches 60-65°C; add 0.1-1.5 parts of the adhesion promoter and the remaining part of the solvent, and mix well to obtain component A; 2) 15-35 2 parts of isocyanate curing agent is component B; 3) before use, mix component A and component B to prepare a quick-drying high-solid polyurea coating.
[0069] Preferably, a solvent is used to adjust the viscosity of component A in step 1).
[0070] According to a typical embodiment of the present invention, according to the construction technology, the solid volume of the fast-drying high-solid polyurea coating of the pr...
Embodiment 1 to 6
[0095] The quick-drying high-solid polyurea coating in embodiment 1 to 6 among the present invention is realized by following production technology:
[0096] Component A: Add modified polyaspartic acid ester resin, add water remover, rheological agent, wetting and dispersing agent, leveling agent, anti-rust pigment and pigment filler during stirring; grind until the fineness reaches 20 microns, temperature Reach 60~65℃; add light stabilizer, UV absorber, adhesion promoter and butyl acetate, mix well; adjust viscosity with methoxypropyl acetate.
[0097] B component: polyisocyanate.
[0098] Before use, mix component A and component B according to the weight ratio shown in Table 1 to prepare the quick-drying high-solid polyurea coating of the present invention.
[0099] The compositions, physical parameters and film properties of the quick-drying high-solid polyurea coatings provided in Examples 1 to 6 are shown in Table 1.
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Abstract
The invention discloses a quick-drying high-solid polyurea coating material, and a preparation method and application thereof. The quick-drying high-solid polyurea coating material comprises the following materials, in parts by weight: 20-45 parts of modified polyaspartic ester resin, 15-35 parts of isocyanate curing agents, 5-15 parts of composite anti-rust pigment, 10-45 parts of a pigment filler, 1-5 parts of an auxiliary agent and 5-15 parts of a solvent, wherein the modified polyaspartic ester resin is prepared from amino monomers, maleic anhydride and alcohol monomers according to a molar ratio of 1:(1.8-2.3):(3.8-4.9). According to the invention, the above specific components and the component contents of the quick-drying high-solid polyurea coating material match perfectly, thus the quick-drying high-solid polyurea coating material provided by the invention has excellent mechanical properties, corrosion resistant performance and decorative performance, and can obviously improve construction production efficiency, and reduce construction time, energy consumption, VOC emissions and labor costs.
Description
technical field [0001] The invention relates to the technical field of anti-corrosion coatings, in particular to a quick-drying high-solid polyurea coating, its preparation method and application. Background technique [0002] Polyaspartate is a kind of secondary amine with a special molecular structure. On the molecule, the non-reactive functional groups around the secondary amine group have a steric hindrance effect on the activation of the secondary amine group and the reaction between the secondary amine group and other functional groups. , this steric hindrance effect can be used to design the reactivity of polyaspartic acid ester at the molecular level to obtain polyaspartic acid ester-based coatings with different pot life, which is different from general small molecule Compared with secondary amines, the pot life of polyaspartate and isocyanate curing agents is greatly extended, which greatly expands the application range of polyurea coatings. For example, it is appl...
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