Polyurethane elastomer is a high-performance elastomer, also known as polyurethane rubber. It is a type of elastic polymer material containing more urethane groups (NHCOO) in the molecular chain.

From the molecular structure point of view, polyurethane is a block polymer. It is generally composed of flexible long chains of oligomer polyols to form soft segments, and diisocyanate and chain extenders to form hard segments. The hard segments and soft segments are alternated to form a repeating structure. unit. In addition to urethane groups, polyurethane elastomers also contain ether, ester or urea groups. Due to the presence of a large number of polar groups, hydrogen bonds can be formed within and between polyurethane molecules, and soft and hard segments can form microphase regions and produce microscopic phase separation. Even linear polyurethanes can form physical crosslinks through hydrogen bonding.

These structural characteristics make polyurethane elastomers have excellent wear resistance and toughness, and are known as "wear-resistant rubber". And because there are many types of raw materials for polyurethane, the variety and ratio of raw materials can be adjusted to produce products with different performance ranges, and the processing methods are diverse, making polyurethane elastomers suitable for many application fields.

Although the production of polyurethane elastomers accounts for a small proportion of the total number of polyurethane products, it is an indispensable and important polyurethane material and a type of high-performance special synthetic rubber.

Polyurethane elastomer has excellent comprehensive properties, and its modulus is between that of general rubber and plastic. In many cases, compared with metal materials, polyurethane elastomer products have the characteristics of light weight, low noise, loss resistance, low processing cost and durability. Corrosion and other advantages; compared with plastics, polyurethane elastomer has the advantages of being non-brittle and wear-resistant. Compared with conventional rubber, polyurethane elastomer has the following advantages: wear resistance, cut resistance, tear resistance, high load-bearing capacity, transparent or translucent, ozone resistance, can be potted and poured, and has a wide hardness range.