High performance and high environmental protection waterborne industrial paint, preparation method and application thereof

Abstract

The invention provides a high performance and high environmental protection waterborne industrial paint, a preparation method and application thereof. The paint comprises a component A and a componentB; the component A comprises the following components by weight: 60-70 parts of an acrylic modified polyurethane emulsion, 10-20 parts of a film-forming assistant, 0.2-0.5 part of a wetting agent, 0.1-0.3 part of a defoamer, 3-5 parts of an accelerator, 5-10 parts of an alcohol resistant assistant, 0.5-1 part of a thickener, 5-20 parts of pigment, 8-15 parts of water, and 0-5 parts of other assistants; and the component B includes the following components by weight: a waterborne curing agent, 70-80 parts of isocyanate, 20-25 parts of a solvent, and 0-0.7 part of a dehydrating agent. Accordingto the invention, the low hydroxyl value waterborne acrylic modified polyurethane emulsion is adopted as the matrix resin, and can provide excellent adhesion and excellent paint film performance effectively, thus saving both labor cost and material cost, having high environmental protection properties, improving the product competitiveness, and being one of the development directions of water paint in the future.

Description

technical field [0001] The invention relates to the field of a high-performance and high-environmental protection water-based industrial coating, in particular to a water-based two-component polyurethane coating with low hydroxyl value and low curing agent, a preparation method and application thereof. Background technique [0002] At present, the paint industry is mainly solvent-based, but high VOC has brought a series of environmental pollution and health hazards. Water-based paint has low VOC, and water is added as a diluent during construction, which is highly environmentally friendly and is the development direction of the paint industry. However, at present, water-based paints have different degrees of defects in terms of gloss, adhesion, cost, etc. [0003] In the prior art, the commonly used water-based two-component polyurethane paint uses hydroxyacrylic acid emulsion as the main resin. The existing hydroxyacrylic emulsion with high hydroxyl monomer content has poo...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the commonly used water-based two-component polyurethane paint uses hydroxyacrylic acid emulsion as the main resin. The existing hydroxyacrylic emulsion with high hydroxyl monomer content has poor polymerization stability, poor appearance of the coating film, insufficient hardness, and insufficient medium resistance. Good and other disadvantages, and due to the high hydroxyl value, the water resistance of the paint film is poor, and it will lead to blackening of the ordinary silver powder paint film, so it is necessary to use specially treated silver powder with a higher price, and the use is limited

At the same time, most of the two-component polyurethane paints in the prior art use a combination of primer and topcoat, and the commonly used two-component polyurethane paint needs to add a higher proportion of curing agent to achieve better construction performance. At the same time, the price of curing agent is relatively high. high