High-solid-content and low-viscosity polyaspartic acid ester primer-topcoat coating suitable for high-pressure airless spraying and preparation method thereof

Abstract

The invention relates to a high-solid-content and low-viscosity polyaspartic acid ester primer-topcoat coating suitable for high-pressure airless spraying and a preparation method thereof. The high-solid-content low-viscosity polyaspartic acid ester primer-topcoat coating comprises the following components in percentage by mass: 30-40% of polyaspartic acid ester resin; 10%-20% of polyester resin;0.3%-1.5% of a dispersing agent; 0.3%-1.0% of a defoaming agent; 1%-3% of a dehydrating agent; 0.3%-0.8% of a leveling agent; 0.4%-1.5% of an anti-sagging agent; 1%-3.0% of an ultraviolet absorber; 34%-45% of pigment; 10%-25% of a filler; 6%-10% of a solvent; 20%-29% of curing agent. Conventional high-pressure airless spraying equipment can be adopted for construction, it is guaranteed that the mixed paint can be normally constructed after 30 min at the environment temperature of 30 DEG C, the surface of a paint film is leveled normally, the defects of pinholes, shrinkage cavities, bubbles andthe like are avoided, the weather resistance, gloss retention, color retention and weather resistance are excellent, the solid content is high, and the requirements of environment-friendly paint aremet; the one-time film forming thickness can reach 150-350mu m, the surface drying and hard drying time is fast, and the working life is long.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a high-solid-content, low-viscosity polyaspartate bottom-surface-in-one coating suitable for high-pressure airless spraying and a preparation method thereof. Background technique [0002] With the continuous and rapid development of my country's national economy and infrastructure, as well as the strengthening of environmental protection policies, the coatings used at this stage not only need to meet environmental protection requirements, but also need to have excellent weather resistance, good resistance to acid, alkali and salt corrosion It is not only durable and wear-resistant, but also has good construction and decoration. In this environment, many different types of environmentally friendly coatings are continuously introduced in the market. As an environmentally friendly coating, polyaspartic acid ester coating has high solid content, low VOC, high strength, high wear res...

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Problems solved by technology

[0003] Traditional polyaspartic ester coating, the main resin polyaspartic acid ester is secondary aminodiamine, the reaction speed is fast, the pot life is short, it is not suitable for conventional high-pressure airless spraying, only two-component suction pump can be used Graco spraying equipment with heating method is used; and due to the influence of factors such as moisture retention in the coating caused by high humidity in the coating manufacturing and construction environment, pinholes will appear after the coating film is dry. Phenomenon

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