Water-based polyurethane functional coating material and preparation method thereof

Abstract

The invention discloses a water-based polyurethane functional coating material and a preparation method thereof. The coating material comprises the following basic ingredients by weight percent: 10 to 40 percent of water-based polyurethane matrix resin, 1 to 10 percent of water-soluble acrylic acid resin, 1 to 5 percent of nano carbon material, 0.1 to 5 percent of silica sol, 0.5 to 2 percent of dispersing agent, 0.1 to 5 percent of moisturizing agent, 0.1 to 5 percent of leveling agent, 1 to 20 percent of butyl cellosolve, 0.1 to 10 percent of normal butanol, 0.1 to 10 percent of ethanol and the balance of water. By adopting the water-based coating material, the high-volume content addition of the nano carbon material can be realized, the conductivity and heat conduction performance of the coating can be effectively controlled, and high heat conduction performance and high conductivity characteristics can be obtained. The volatilization rate of solvent is reasonably controlled by virtue of flexible mixing, different construction coating process requirements can be met, and the applicability is wide. The novel functional coating material formula system can be used as a conducting coating material (ink), a radiation heat radiation coating material, an electric thermal coating material (ink), an antistatic coating material and an electromagnetic shielding coating material and has an important commercial value.

Description

technical field [0001] The invention relates to a water-based paint and a preparation method thereof, in particular to a water-based polyurethane functional paint and a preparation method thereof. Background technique [0002] Carbon materials are materials with the most complete functions, the most superior performance, and the most diverse forms among the materials recognized by human beings, covering from zero-dimensional, one-dimensional to two-dimensional structures. Every appearance of nano-carbon materials has led to the rapid development of nanotechnology. develop. Among them, carbon nanotubes can be regarded as a graphite sheet curl structure. The super strong C-C bond makes carbon nanotubes have super strong mechanical properties and thermal conductivity. Theoretical calculations and actual measurements show that the tensile strength of single-walled carbon nanotubes It can reach 150GPa, and its elastic modulus is 1TPa, which is 100 times that of steel, but its ...

AI Technical Summary

Problems solved by technology

[0003] Due to the huge specific surface area of ​​nano-carbon materials, it is difficult to disperse, and it is difficult to obtain a uniform compound with a high volume content in the resin, which limits the continuous improvement of the electrical conductivity and thermal conductivity of the coating film.

The addition of high-volume inorganic fillers often leads to a sharp decline in the film-forming properties of coatings. How to overcome the addition of high-volume inorganic fillers and maintain good film-forming properties is a long-term difficulty faced by the coatings industry

In particular, the viscosity of the resin matrix rises sharply after the compounding of nano-carbon materials, which makes it difficult to control the film-forming properties of coatings, and nano-carbon materials generally have good dispersion in aqueous systems, and traditional solvent-based systems can hardly mix evenly with nano-carbon materials