What is 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 is very versatile and can replace rubber, plastic, nylon, etc., used in airports, hotels, building materials, automobile factories, coal mines, cement factories, high-end apartments, villas, landscaping, colored stone art, parks, etc.

The role of polyurethane:

Polyurethane can be used in the manufacture of plastics, rubber, fibers, rigid and flexible foams, adhesives and coatings, etc. It can be used in various fields of people's lives and has a wide range of applications.

1. Polyurethane foam: divided into rigid polyurethane foam, semi-rigid polyurethane foam and flexible polyurethane foam. Rigid polyurethane foam is mainly used for building thermal insulation materials, thermal insulation materials (thermal insulation of pipeline facilities, etc.), daily necessities (beds, sofas, etc. pads, refrigerators, air conditioners, etc., insulation layers, and surfboards, etc. core material. ), and means of transport (materials such as cushions and ceilings for automobiles, airplanes, and railway vehicles).

2. Polyurethane elastomer: Polyurethane elastomer has the advantages of good tensile strength, tear strength, impact resistance, abrasion resistance, weather resistance, hydrolysis resistance, oil resistance and so on. Mainly used for coating materials (such as protection of hoses, washers, tires, rollers, gears, pipes, etc.), insulators, shoe soles, and solid tires.

3. Polyurethane waterproof material: Polyurethane waterproof material is very convenient to use. It can be mixed and coated on site and cured with normal temperature and humidity, and a waterproof layer with no seams, rubber elasticity and good performance can be obtained. And easy to repair after damage. Generally used as paving materials, track and field track materials, racetracks, park ground materials, thermal insulation window frames, etc.

4. Polyurethane coating: Polyurethane coating has strong adhesion, and the coating film has excellent wear resistance, water resistance and chemical resistance. Mainly used for furniture coatings, building materials coatings and industrial printing inks.

5. 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 adhesion to the substrate, excellent water resistance, oil resistance and chemical resistance. Polyurethane adhesives are mainly used in packaging, construction, wood, automobile, shoemaking and other industries.

6. Biomedical materials: Polyurethane has excellent biocompatibility, so it 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, artificial kidneys, artificial dialysis membranes, etc.