The Concept, Features and Uses of the Polyurethane

What is polyurethane?

The full name of polyurethane is polyurethane, which is a general term for macromolecular compounds containing repeating urethane groups on the main chain. Polyurethane is a subgroup of urethane in my country, and it can also contain ether ester urea biuret urea group first polyurethane introduction group. It is formed by polyaddition of organic diisocyanate or polyisocyanate and dihydroxyl or polyhydroxyl compound. Polyurethane material has a wide range of uses and can replace rubber, plastic, nylon, etc. for airports, hotels, building materials, medical, etc.

Features of Polyurethane

1. Polyurethane has better resistance to air and moisture, and excellent corrosion resistance.

2. Stable quality, good weather resistance and long service life, which can reduce costs.

3. Long-term insulation performance, strong temperature resistance, can be at minus 20 degrees to high temperature of 120 degrees, and its thermal insulation performance can last for 20-50 years or more.

Uses of Polyurethane

Polyurethane materials have a wide range of uses, and can replace rubber, plastic, nylon, etc., used in airports, hotels, building materials, medical, etc., and are used in various industries in people's lives.

1. Polyurethane foam: divided into rigid polyurethane foam, semi-rigid polyurethane foam and flexible polyurethane foam. Rigid polyurethane foam is mainly used for thermal insulation of engineering buildings, thermal insulation materials (pipeline equipment, etc.), daily necessities (beds, fabric sofas, etc. pads, refrigerators, central air conditioners, etc.) Boards and surfboards, etc.), and their means of transportation (seat cushions, canopies and other materials for cars, airports, and rolling stock).

2. Polyurethane elastomer: Polyurethane elastomer has the advantages of very good tensile strength, tear strength, impact resistance, wear resistance, aging resistance, hydrolysis resistance, and wear resistance. Applied to coating materials (such as maintenance of plastic hoses, sealing rings, tire belts, rollers, transmission gears, pipes, etc.), conductors and insulators, shoe soles and their solid tires.

3. Polyurethane coating: Polyurethane coating has strong adhesion, and the coating has high-quality wear resistance, wear resistance and drug resistance. It is mainly used for furniture coatings, building materials coatings and industrial printing inks.

4. Polyurethane waterproof material: Polyurethane waterproof material is very convenient to use. It can be mixed and glued on site and dried with moisture in the body at room temperature, so that the ground waterproof with seamless, vulcanized rubber ductility and excellent characteristics can be obtained. And easy to repair after damage. Generally used as paving materials, track and field track materials, racing fields, ecological park floor materials, thermal insulation windows, etc.

5. Medical materials: Polyurethane has excellent biocompatibility and is gradually widely used as biomedical materials. It can be used in the manufacture of artificial cardiac pacemakers, artificial blood vessels, artificial bones, artificial esophagus, etc.

4. Polyurethane adhesive: The performance of the cured product can be adjusted by adjusting the ratio of isocyanate and polyol, so that it can achieve high-width ratio adhesion, high-quality wear resistance, wear resistance and Its chemical resistance. Polyurethane material adhesives are mainly used in packaging, engineering construction, wood, car, leather processing and other manufacturing industries.

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