Self-crosslinked oxidation and high-efficient dispersion with water polyurethane and production thereof

Abstract

A high-efficient and oxide self-cross-linking disperser of water-based polyurethane and its production are disclosed. The disperser consists of polyester polybasic alcohol (A) containing at least two hydroxyl groups, drying oil long oil alkyd resin (B) containing at least one hydroxyl group, vulcabond containing at least one aromatic or fatty group and water-based functional monomer. It has better coating comprehensive performance and costs low. It can be used for plastic, wood and metal.

Description

Technical field:

[0001] The invention relates to a high-efficiency oxidative self-crosslinking type water-based polyurethane dispersion coating for plastic, wood, metal and other substrates and a preparation method thereof. Background technique:

[0002] Polyurethane has excellent physical and chemical properties, such as: chemical stability, friction resistance, toughness, elasticity, as a coating, it has been widely used in the coating of plastic, wood, metal and other substrates. Traditional polyurethane coatings are solvent-based, and the system contains some organic solvents. These solvents evaporate into the air during the film-forming process, causing environmental pollution. Volatile organic solvents not only pollute the environment, but also increase the cost. A feasible way to solve this problem is to replace the organic solvent with water as the dispersed phase of the system. Methods for dispersing water-insoluble polymers in the water phase include forced exter...