Waterborne polyurethane emulsion, waterborne polyurethane cooling coating and preparation method

Abstract

The invention discloses a waterborne polyurethane emulsion and a preparation method. The waterborne polyurethane emulsion is prepared from the following components in parts by weight: 0.1-0.2 part ofdibutyltin dilaurate, 10-15 parts of polypropylene glycol 2000, 5-8 parts of polyadipic acid-1,4-butanediol ester, 1.3-2 parts of 2,2-dimethylolpropionic acid, 10-15 parts of isophorone diisocyanate,0.5-0.85 part of pentaerythritol, 6-8 parts of acetone, 1.5-2 parts of 1,4-butanediol, 0.8-1.2 parts of triethylamine, 1-2 parts of gamma- aminopropyltriethoxysilane and 55-60 parts of water. The invention also discloses a waterborne polyurethane cooling coating and a preparation method. The waterborne polyurethane cooling coating is prepared from the following components in parts by weight: 90-95parts of waterborne polyurethane emulsion, 0.1-0.5 part of ammonia water, 0-2 parts of color paste, 0.1-0.5 part of a dispersant, 4-6 parts of cooling reflective filler, 0.5-0.8 part of a defoamer, 0.2-0.4 part of a thickener, 0.5-1.5 parts of a flatting agent and 5-10 parts of dipropylene glycol monomethyl ether.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a water-based polyurethane emulsion, a water-based polyurethane cooling paint and a preparation method. Background technique [0002] With the acceleration of the urbanization process, the construction of urban road traffic has been continuously improved. However, a series of urban eco-environmental problems also appear in the process of urbanization, among which the urban heat island effect has become one of the most obvious urban eco-environmental problems. At present, extensive and massive research has been conducted on how to mitigate the urban heat island effect. In recent years, the research and development of cooling materials has also received more and more attention. Solar heat reflective coatings were first successfully developed by developed countries in western science and technology. In the late 1970s, some developed countries such as Japan, Western Europe...

AI Technical Summary

Problems solved by technology

Acrylic adhesives have good acid resistance, water resistance and adhesion, but it is difficult to control the residual monomers of the reaction. Usually there will be some residual monomers. The residual monomers not only affect the performance but also pollute the environment, and the compressive strength is poor, which belongs to the brittle hard type. ;Epoxy coatings usually need to use diluent and curing agent. Commonly used diluents include hydrocarbons, aromatic hydrocarbons and esters, etc., and curing agents such as organic acids and fatty amines. Therefore, after 2-3 years of general use, a large area will fall off

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