Water-base polyurethane coating for fan blades and preparation method thereof

Abstract

The invention relates to water-base polyurethane coating for fan blades and a preparation method thereof. The water-base polyurethane coating comprises component A and component B by weight proportion of 5:1. The component A comprises deionized water, anti-settling agents, wetting dispersant, defoaming agents, rutile type titanium dioxide powder, carbon black, precipitated barium sulphate, acrylic dispersion, filming auxiliary, flatting agents and thickeners, and the component B comprises hydrophilic modified polyether HDI (hexamethylene diisocyanate) trimer, modified polyester HDI trimer and propylene glycol methyl ether acetate. By taking water as a main dispersion medium, the water-base polyurethane coating for the fan blades has the advantages of low VOC (volatile organic compounds) release, light smell, low harms on human bodies, non-combustible property, unique safety in storage, transport and use, excellent performance and the like, and further, safety potential hazards caused by accumulation of a great quantity of harmful solvents can be eliminated, and physical and psychological health of constructors are benefited greatly.

Description

technical field [0001] The invention belongs to the technical field of coating chemicals, and in particular relates to a water-based polyurethane coating for fan blades and a preparation method thereof. Background technique [0002] As a renewable and non-polluting green energy, wind energy is abundant in reserves, inexhaustible and inexhaustible. The large-scale development and utilization of wind energy will effectively reduce the use of petrochemical energy, reduce greenhouse gas emissions, and protect the environment. Vigorously developing wind energy has become an important choice for governments around the world. [0003] my country is rich in wind energy resources. With the vigorous development of my country's wind power industry, the demand for coatings for wind turbine blades is naturally increasing. However, most of the coatings used at present are solvent-based systems, which release a large amount of solvents during construction, which is harmful to the environme...

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Problems solved by technology

[0003] my country is rich in wind energy resources. With the vigorous development of my country's wind power industry, the demand for coatings for wind turbine blades is naturally increasing. However, most of the coatings used at present are solvent-based systems, which release a large amount of solvents during construction, which is harmful to the environment. Serious pollution is even more detrimental to ecological health. This is extremely inconsistent with the environmental protection attributes of wind energy itself, and it is also contrary to my country's "energy saving and emission reduction" and sustainable development strategies.

As for the water-based environmentally friendly coatings for wind turbine blades, although some domestic manufacturers have begun to try to use them, due to complete dependence on imports, there are problems such as high product prices, long delivery cycles, and especially slow feedback on problems that arise during construction. Its application has been severely restricted. Therefore, it is particularly important and imperative for our country to develop and use water-based fan blade coatings.

[0004] However, the research on fan blade coatings in my country is relatively late, and the design idea is hydroxyacrylic resin + isocyanate curing agent, and the low-temperature performance of the coating formed by it is poor; there are also hydroxyacrylic resin + polyester resin + isocyanate curing agent Composition Coatings, but the weather resistance of the coating film is poor, and it cannot meet the higher requirements of my country for the performance of wind power blade coatings

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