The water-based polyurethane emulsion has gradually replaced the solvent type and has become an important direction for the development of the polyurethane industry.Water-based polyurethane can be widely used in coatings, adhesives, fabric coatings and finishing agents, leather finishing agents, paper surface treatment agents and fiber surface treatment agents.

 1. Coating agent: Leather-coated polyurethane material is flexible and wear-resistant, and can be used as a coating agent and injury repair agent for natural leather and artificial leather.It is used to replace acrylate resin emulsion leather finishing agent. When processing high-grade natural leather, it overcomes the shortcomings of acrylate resin's “hot sticky and cold crisp”, and the finished leather feels soft and plump.It can be blended with acrylate resin for use.Polyurethane-coated leather can be used for boots, shoes, clothing, ladies bags, etc.; Fabric coatings can be used as coating agents for a variety of fabrics, such as canvas, clothing fabrics, and conveyor belt coatings; fiber treatment agents, cotton fibers, and chemical fibers are impregnated with a dilute solution of polyurethane emulsion, dehydrated, and heat treated to improve the feel, crease resistance, and shrinkage resistance; plastic coatings, nylon, ABS and other surface coatings; floor coatings can be used in stadiums, indoor wooden floor coatings, concrete floor coatings, wear-resistant, impact-resistant, and good gloss; coatings of other materials, such as paper coatings, automotive interior decoration coatings; primer.

 2. Adhesives: Like solvent-based polyurethane adhesives, water-based polyurethane adhesives have good adhesion properties and can be used as coating adhesives for various substrates and bonding and bonding of various substrates.

Manufacturing of a variety of laminates, plywood, food packaging composite plastic film, fabric laminates, laminates of various thin-layer materials; flocking adhesives, artificial leather adhesives, glass fiber and other fiber cluster adhesives, ink adhesives; bonding of ordinary materials; the application method of water-based polyurethane adhesives is basically the same as the solvent type.

 3. Wood processing: Wood processing is the largest application field of water-based adhesives.Water—based adhesives commonly used in the manufacture of plywood, fiberboard, and particle board are urea-formaldehyde resin, melamine-formaldehyde resin, phenolic resin, etc., and water-based adhesives for woodworking bonding are vinyl acetate resin emulsion, ethylene-vinyl acetate resin emulsion, acrylate resin emulsion, etc.Preclude the use of "trialdehyde resin" to manufacture composite plates.

Water-based polyurethane is a new type of polyurethane system with water instead of organic solvents as the dispersion medium, also known as water-dispersible polyurethane, water-based polyurethane or water-based polyurethane.Water-based polyurethane uses water as the solvent, which has the advantages of non-polluting, safe and reliable, excellent mechanical properties, good compatibility, and easy modification.

 According to the particle size and appearance, it can be divided into aqueous polyurethane solution, polyurethane water dispersion, and polyurethane emulsion; according to the charge properties of hydrophilic groups, water-based polyurethane can be divided into anionic water-based polyurethane, cationic water-based polyurethane and nonionic water-based polyurethane.Among them, the anionic type is the most important, and it is divided into the acid type and the sulfonic acid type; in terms of appearance: water-based polyurethane can be divided into polyurethane emulsion, polyurethane dispersion, and aqueous polyurethane solution.The most practical applications are polyurethane emulsions and dispersions.