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First thermoplastic polyurethane based on CO2 technology

First thermoplastic polyurethane based on CO2 technology2018.10.16

Under the name cardyon™, Covestro is developing and marketing new polyether carbonate polyols that are produced with the aid of carbon dioxide (CO2). With Desmopan® 37385A the company now offers the first representative of a new series of thermoplastic polyurethanes (TPU) containing polyether carbonate polyols based on CO2 technology. 


Compared to conventional TPU materials, the new TPU products leave a lower carbon footprint and help close the carbon cycle. They also conserve fossil resources and, unlike many bio-based materials, do not compete with food production. 


“With the new TPU, our customers can reduce the carbon footprint of their products and as a result play a pioneering role in sustainability vis-à-vis their competitors,” explains Georg Fuchte, TPU expert at Covestro. “This is especially true for companies in the consumer goods industry, which often manufacture products with a short lifespan.”


Excellent mechanical properties

Desmopan® 37385A has a hardness of 85 Shore A. Its mechanical properties are at least at the level of conventional TPU grades of similar hardness, and even exceed some of them. For example, it has a tensile strength of 36 megapascals. The elongation at break reaches 660 percent (DIN 53504). The plastic is designed for extrusion, but is also suitable for injection molding. “The application spectrum covers typical applications of conventional TPU grades with comparable hardness and ranges from soles and upper shoe components to sportswear, handles and knobs to packaging for sensitive electronics,” says Fuchte. 


Different product variants

Covestro plans to expand the new TPU series with variants of different hardness. A product with a hardness of 95 Shore A, for example, whose melt cures rapidly during processing, is well advanced in development. “We are thus targeting applications in which economic production in short cycle times is particularly important,” explains Fuchte. 


Covestro cooperates closely with companies and research institutions to use CO2 technology as a synthesis platform for other large-scale chemical raw materials. For example, work is underway on new CO2-based polyols for rigid polyurethane foams that could be used, for example, in the thermal insulation of buildings, in automobiles and in sports equipment. At the Dormagen plant, Covestro already operates a production plant that produces CO2-based polyols for flexible polyurethane foams. The latter are used in the commercial production of upholstered furniture and mattresses. 




source: covestro.com


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