Self-drying water-based aluminum powder coating for PVC screen, and preparation method and application thereof

Abstract

The invention discloses a self-drying water-based aluminum powder coating for a PVC screen, and a preparation method and application thereof. The self-drying water-based aluminum powder coating comprises, by mass, 50-60% of water-based resin, 20-25% of water-based aluminum powder and 5-15% of an water-based additive. Furthermore, the water-based additive comprises a water-based dispersing agent, awater-based leveling agent, a water-based defoamer, a water-based anti-settling agent and water-based wax slurry. The water-based coating is used for replacing an oil-based coating, water is used asa solvent, the cost is reduced, safety and environmental protection are achieved, and pollution to the environment and physical health of constructors are greatly reduced; and the performance indexesof the screen used for a long time are slow in attenuation, and the emission of VOC is reduced as the resin with lower film-forming temperature is selected and used without additionally adding a high-boiling-point cosolvent.

Description

technical field [0001] The invention belongs to coating technology, and in particular relates to a self-drying water-based aluminum powder coating for PVC screens and a preparation method and application thereof. Background technique [0002] At this stage, most of the paints used in PVC screen coatings are oily. They are mixed with one or more of different self-drying acrylic or alkyd resins, and then mixed with aluminum powder in an appropriate proportion to meet the performance index requirements. , The composition during construction is the main silver paint, organic solvent, the paint mixing ratio is 100:80-100, the solid content is low during construction, and the organic solvent content is more. [0003] Existing PVC screen coatings have several disadvantages and deficiencies: ① Due to the use of oil-based coatings, the storage site must be a special warehouse for dangerous goods, which increases storage costs and poses safety hazards; ② Oil-based coatings must use a ...

AI Technical Summary

Problems solved by technology

[0003] Existing PVC screen coatings have several disadvantages and deficiencies: ① Due to the use of oil-based coatings, the storage site must be a special warehouse for dangerous goods, which increases storage costs and poses safety hazards; ② Oil-based coatings must use a large amount of Quick-drying solvents not only have a strong smell, but are also easily breathed into the body by construction workers or irritate the exposed skin and cause health effects; ③Since oil-based paints are diluted with a large amount of organic solvents during construction, and the paint itself contains a large amount of organic solvents, when used and After construction, it will inevitably volatilize into the environment, causing environmental pollution; ④Oil-based paint needs to be diluted with organic solvents, which increases the cost; During the process, solvents are constantly volatilized, which has a certain impact on the comfort of moviegoers; ⑥The main film-forming resin used in oil-based paints is prone to yellowing, and the surface of aluminum powder is easily oxidized. The layer will turn yellow and black, and the performance indicators (gain brightness, scattering angle, polarization contrast) will gradually decline, and the comfort and 3D effect will be greatly affected during the screening.

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