Waterborne polyurethane for automotive trim and automotive chassis paint

Abstract

The invention relates to waterborne polyurethane for automotive trim and automotive chassis paint. The waterborne polyurethane is prepared from 10-30 parts of fat-soluble particles, 10-50 parts of polyisocyanate, 20-40 parts of a hydrogen-containing compound, 0.5-2 parts of a flame retardant, 1-5 parts of a chain extender, 1-5 parts of zeolite powder, 0.5-0.8 part of an epoxy resin curing agent, 0.2-0.6 part of an organic drier, 10-50 parts of a water-based curing agent, and 0.5-1 part of a cell regulator. The waterborne polyurethane prepared by the method has the advantages of moderate viscosity, light color, high brightness and good leveling property, is non-toxic after being cured with epoxy resin, has better insulativity, water resistance and wear resistance, and can play a good protective role when being used for automotive trim or automotive chassis paint.

Description

technical field [0001] The invention relates to the field of automobile interior spraying or automobile chassis paint spraying, in particular to a water-based polyurethane used for automobile interior decoration and automobile chassis paint. Background technique [0002] The scientific name of automobile chassis armor is automobile chassis anti-collision, anti-rust and sound insulation (primer), that is, chassis paint, a high-tech adhesive rubber asphalt coating, which is non-toxic, high coverage, and high adhesion. Spray on exposed parts such as vehicle chassis, wheel hubs, fuel tanks, car underpanels, and trunks. Water-based polyurethane is a new type of polyurethane system that uses water instead of organic solvents as the dispersion medium. It is also called water-dispersed polyurethane, water-based polyurethane or water-based polyurethane. Water-based polyurethane uses water as a solvent, and has the advantages of no pollution, safety and reliability, excellent mechanic...

AI Technical Summary

Problems solved by technology

Among them, polyurethane coating agents have good film-forming properties, strong hiding power, firm bonding, and excellent physical properties of the coating, which can greatly improve the grade of finished leather. Therefore, they have been highly valued and widely concerned. Water-based polyurethane can be widely used Coatings, adhesives, fabric coating and finishing agents, leather finishing agents, paper surface treatment agents and fiber surface treatment agents are widely used in automotive interior spraying and automotive chassis paint spraying, forming a firm elastic protective layer after fast drying , can prevent the impact of flying stones and gravel, avoid the erosion of moisture, acid rain, and salt on the metal of the vehicle chassis, prevent the chassis from rusting and corrosion, and protect the driving safety of the car owner. The water-based polyurethane emulsion prepared by the traditional method has poor stability and low viscosity. And it is not flame retardant, sprayed on the interior and chassis of the car, the safety performance is low