Poly-urethanes (in short PUR) are a product resulting from polyaddition of aromatic or alifatic di-isocyanates with compounds containing, at least, 2 hydroxyl groups (i.e. dihydric alcohol, poly-ethers, polyesters). The physical properties of chemical products depend on the composition of product particle mass.
From poly-urethanes result materials of varying properties regulating the operation of isocyanates and polyols.
Poly-urethanes are widely applied in all technical and commercial fields.
Production installation
From poly-urethanes various types of materials are produced. Among others
stiff foam used in building, shipbuilding and aircraft production, as elements strengthening and filling various constructions.From elastic foam are produced mattresses (with application in the furniture and automotive industries, etc.) and clothing laminates.
Other areas of use for poly-urethanes include protective covers on metals, wood or concretes. Protective covers are resistant to the action of atmospheric and chemical factors. Commonly widespread is also the production of poly-urethane lacquers.
Known too are poly-urethane glues giving great durability and signifying good adhesion to metal, wood, cloth, rubber and various types of laminates.
Poly-urethane Elastomers with regard for their great durability are applied in the production of transporting wheels carrying significant weights, drive belts of long life, in the shoe industry to make heels and under sole linings, to make printing rollers, pump parts or as dampers for shocks and vibration.
Poly-urethanes in the form of liquids are applied for the impregnation of various products, fabrics, paper, metal or as lubricants.
Poly-urethanes are also used in the production of leather substitutes (artificial leather for footwear, soles, haberdashery and clothing products and imitation wood.
They are also known for its mechanical resistance, resistance to abrasion, laundering, the action of atmospheric factors and solvents.
Poly-urethanes also are applied currently for covering various types of fabric, particularly polyester and polyamide because of the high adherence of poly-urethane compounds to the majority of surfaces.