PU sealing primer capable of high wetting and high permeability substrate and preparation method thereof

Abstract

The invention relates to a PU (polyurethane) seal primer capable of highly wetting and highly infiltrating a substrate and a preparation method of the PU seal primer. The PU seal primer capable of highly wetting and highly infiltrating the substrate is prepared by mixing a main coating, a curing agent and a diluting agent, wherein the main coating comprises the following components in parts by weight: castor oil modified alkyd resin, tall oil alkyd resin, butyl acetate, propylene glycol methyl ether acetate, acetic ether, a defoaming agent, a drier and zinc stearate; the curing agent comprises the following components in parts by weight: aliphatic polyisocyanate, an aromatic diisocyanate TDI additive compound, dehydrated butyl acetate, dehydrated ethyl acetate and propylene glycol methyl ether acetate; and the diluting agent comprises the following components in parts by weight: butyl acetate, propylene glycol methyl ether acetate, dihydric acid ester and mixed acid methyl ester. The PU seal primer capable of highly wetting and highly infiltrating the substrate, prepared by the method provided by the invention, not only has good penetrability and wettability to the substrate but also has good environmental friendliness.

Description

technical field [0001] The invention relates to a paint for home decoration, in particular to a PU sealing primer capable of high wetting and high permeability substrates and a preparation method thereof. Background technique [0002] Since the 1990s, due to the depletion of forest resources and the consideration of environmental protection, the protection and logging of logs has become a policy strictly controlled by various countries, and the price of solid wood furniture has also continued to rise. , This kind of solid wood furniture industry that uses non-renewable resources as materials will be severely impacted by the scarcity of raw materials. Under such a market background, a large number of furniture manufacturers have begun to use artificial materials such as MDF, artificial veneer boards, and solid wood panels to produce furniture, which can greatly reduce costs while ensuring sufficient raw materials. In recent years, the manufacture and use of this kind of mate...

AI Technical Summary

Problems solved by technology

In recent years, the manufacture and use of this kind of material in our country has developed rapidly. While it has the advantages of high quality, low price and easy painting, this kind of material has also exposed some problems. Due to the limitation of technology, this type of artificial board has different density. There is a big difference, resulting in the difference in the moisture content, hollowness and glue content of the overall board, which will cause disadvantages in the use and coating process of this kind of material

[0003] General primers on the market can only treat the surface of MDF and other man-made panels due to factors such as surface tension. However, due to different processes and raw materials, the interior of these man-made panels contains a large amount of water, air, Adhesives and other non-fibrous substances used in board making, if not treated, these substances will expand and evaporate within a period of time after the coating is completed, causing deformation, expansion and Phenomena such as coating peeling off

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