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Covestro develops CO2-based TPU

Covestro produces CO2-based polyols for flexible polyurethane foams at its Dormagen site near Cologne

Covestro AG is now taking the successful development of its new polyether carbonate polyols based on CO2-technology - which the company is marketing under the brand name cardyon - another step further with the launch an innovative series of thermoplastic polyurethanes (TPU) incorporating the technology.

The German chemicals company said Desmopan 37385A is the first representative of a new series of TPUs containing CO2-based polyether carbonate polyols.

With cardyon being made of up to 20% CO2, the new TPU materials leave a lower carbon footprint compared to conventional materials.

Desmopan 37385A has a hardness of 85 Shore A and, according to Covestro, its mechanical properties are “at least at the level of conventional TPU grades of similar hardness”.

It has a tensile strength of 36 megapascals and the elongation at break reaches 660%. The plastic is designed for extrusion, but is also suitable for injection moulding.

“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,” explained Georg Fuchte, TPU expert at Covestro.

Covestro plans to expand the new TPU series with variants of different hardness. The company said a product with a hardness of 95 Shore A, whose melt cures rapidly during processing, is in advanced stages of development.

“We are thus targeting applications in which economic production in short cycle times is particularly important,” explains Fuchte.

In January 2016, Covestro opened its €15m production plant to produce CO2-based polyols for flexible polyurethane foams at its Dormagen site near Cologne.

The company said today that it is now working on new CO2-based polyols for rigid polyurethane foams that could be used, for example, in the thermal insulation of buildings, in cars and in sports equipment.

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