Polyurethanharz, vollständiger Name Polyurethan, als Polymerverbindung, mit seiner Vielfalt und hervorragenden Eigenschaften in der Branche. This article will delve into the properties of polyurethane resins and their wide range of applications, including coatings, elastomers, foams, Klebstoffe, and fibers. Zusätzlich, we will look at the rise of water-based polyurethanes and explore their prospects in the field of environmentally friendly coatings.

Characteristics of polyurethane resin:
The synthesis of polyurethane resins involves the reaction of a diisocyanate with a compound with two or more hydroxyl groups. These include commonly used monomers such as toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), hexane diisocyanate (HDI), usw., as well as polyols such as ethylene glycol, polyester oligomers and polyether oligomers. The reaction mechanism involves the reaction of isocyanate group with hydroxyl group to form carbamate unit. The main properties of polyurethane resin come from the carbamate group (-NHC0O-) on its main chain, and its macromolecular structure can also contain different groups such as ether, Ester, urea, biuret, urea formate, usw. Polyurethanes can be divided into polyester and polyether types, according to the different hydroxyl components.

High temperature resistance, stable under extreme temperature conditions;

Eigenschaften und Anwendungsanalyse von Polyurethanharz

Electrical insulation, as a good choice of insulating materials in the electronic and electrical fields;

Chemische Korrosionsbeständigkeit, high resistance to a variety of chemical substances;

Flexibility for applications that require flexibility, such as coatings and adhesives;

Adhäsion, with excellent adhesion, can be widely used in adhesives and coatings.

Application of polyurethane resin:
Coatings and finishes, polyurethane resins are used in a wide variety of coatings, including two-component and single-component polyurethane coatings. Excellent mechanical properties, high solid content, strength and toughness, adhesion, Wasserbeständigkeit, wear resistance and corrosion resistance are shown in the fields of wood paint, automobile repair paint, anti-corrosion paint and floor paint.

Eigenschaften und Anwendungsanalyse von Polyurethanharz

Elastomers, elastomers made of polyurethane resin, such as polyurethane rubber, are widely used in the manufacture of seals, vibration dampers, vehicle suspension systems, usw.

Foam materials, polyurethane foam in the form of hard and soft foam, used in seats, washers, insulation materials, packaging materials and other fields.

Klebstoff, polyurethane resin adhesive because of its excellent bonding properties, can be bonded to metal, Glas, plastic and wood and other materials.

Polyurethane fibers are widely used in the manufacture of synthetic leather, elastic fibers, ropes and fabrics, showing good wear resistance and flexibility.

Eigenschaften und Anwendungsanalyse von Polyurethanharz

peroration
In den vergangenen Jahren, the development of waterborne polyurethane has become the focus of the industry. By using water as dispersion medium, waterborne polyurethane avoids the use of organic solvents, and has the advantages of pollution-free, sicher und zuverlässig, good mechanical properties, good compatibility and easy modification. Its synthesis process includes two stages of pre-step polymerization and dispersion, which makes it have a wide application prospect in the field of environmental protection coatings. As a multifunctional polymer compound, polyurethane resin shows infinite possibilities. Its excellent properties provide a wide range of options for industrial applications in coatings, elastomers, foams, adhesives and fibers. With the rise of water-based polyurethane, the field of environmental protection coatings will usher in more innovation, polyurethane resin will continue to lead the development trend of polymer materials in the future.