Covestro is a world-leading supplier of thermoplastic polyurethanes at present. Its thermoplastic polyurethanes exhibit many of the valuable characteristics of rubber and thermoplastic materials. Their properties can be adjusted by the modular principle through careful selection of the raw materials. Basically, every one of the talents displayed by Covestro’s TPU resins can be tailored to the particular end-user. It is this flexibility that makes Covestro’s TPU materials so innovative and unique in markets.

Besides, Covestro’s TPU materials are widely used in many industries e.g. automotive, electrical and electronics, construction and the sports and leisure industries; and they include the following properties, which make end-user very interesting for a broad variety of applications:

1. Desmopan 100 ester grades：Injection molding, extrusion and blow molding grades with a high mechanical strength. In extrusion applications, there is no crystallization of the melt with grades in this series even when the extruder has been in service for a long period of time. Used primarily for articles subject to wear, such as castors, shoe heels, pneumatic hoses and bellows.

2. Desmopan 200 ester grades：Blown film and coating grades that can be used for the production of commodity goods in food-contact applications. More information on the subject of “Food Contact” can be provided.

3. Desmopan 300 ester grades：Injection molding and extrusion grades with high mechanical strength plus improved hydrolysis resistance and low temperature flexibility. Low swelling values in oils, greases and solvents. This is the most frequently used range of products for extruded articles of all types and for highly stressed structural parts.

4. Desmopan 400 ester grades：Thanks to the use of various specialty raw materials and auxiliaries, this product range offers a number of special properties. Compared with the 100 and 300 ranges of ester grades, improvements have been made (depending on the grade) to:

These injection molding grades are used primarily in functional engineering components for automotive, mechanical and plant engineering.

5. Desmopan 500 ether/ester grades：Economical ether/ester grades combining the advantages of both classes of raw materials. They are used in applications where mechanical stresses occur with a simultaneous risk of damage through microorganisms. Areas of application include extrusion coating, seals, injection-molded engineering components and watch straps.

6. Desmopan 600 ether grades：The grades in the 600 range can be used as an economical solution where the hydrolysis stability and microbial resistance of the 900 range are specified, but the demands made on the mechanical properties are lower. Potential applications include rigid/flexible combinations.

7. Desmopan 700 carbonate grades：The grades in this range have been developed for specific applications and have been successfully used in practice for many years. They have good microbial and hydrolysis resistance, swell less in water than the ether grades and have mechanical properties comparable with those of the ester grades.

8. Desmopan W8000 aliphatic grades：Products based on an aliphatic isocyanate combine the familiar TPU properties with resistance to yellowing due to UV light. These products are therefore particularly suitable for colored applications in the automotive segment. We are carrying out intensive product development activities in the field of aliphatic products, as a result of which our product portfolio is being continuously optimized. Apart from the products listed here for injection molding, slush and extrusion applications, we can, on request, also provide you with further information about our latest product developments.

9. Desmopan 900 ether grades：Products with very good hydrolysis and microbial resistance. An additional characteristic is their very good low temperature flexibility. The 900 series is used, for example, in applications where good flexibility or impact strength is required at very low temperatures. Some of the following products can be used for food-contact applications. Applications include cables, hoses, profiles, films and shoe shells.

10. Desmopan Impact-modified ester grades：These grades were developed primarily for shoe shells and similar applications. The shoe shells and ski boots produced from them are light in weight and offer high stiffness and elasticity with very good low-temperature impact strength. The modified Desmopan® grades also have high scratch and abrasion resistance.

11. Desmopan Glass fiber reinforced grades (R-TPU)：Injection-molded parts made of glass fiber-reinforced Desmopan® are noted for their low shrinkage and low coefficient of expansion. In fact, the coefficient of expansion in the direction of the glass fibers is more or less the same as that of aluminum. Field of application: exterior automotive engineering components. Components made of R-TPU are noted for their high heat resistance, good low-temperature impact strength and sound insulation, good flow properties and accurate reproduction of detail. Molded parts can be printed and painted.

7. Texin medical grades：These grades meet the requirements of ISO10993 Part 1 “ Biological Evaluation of Medical Devices” tests with human tissue contact time of 30 days or less.

Hot-melt grades：A linear TPU hot-melt grades with a high crystallization rate and a very low thermo-plasticity. They are suitable for the manufacture of adhesive film, webs and fleece for bonding other materials. They have outstanding adhesion to leather, textiles wood fiberboard and various plastics including polyurethane elastomers and flexible PVC.

TPEE from Korea LG has good mechanical properties. It also acquires extraordinary properties in processing and good elasticity. Under broad range of temperatures and requirement of operation, it shows very good performance in its properties in mechanical, physical, chemical and electricity.