Covestro develops CO2-based elastomers for offshore industry 

Leverkusen, Germany – Covestro AG has developed sustainable a cast elastomer system for the offshore industry, enabling the sector to reduce its environmental impact and carbon footprint.

Based on CO2-driven cardyon-branded polyols, Desmodur polyurethane elastomer system is claimed to offer a similar performance compared to petrochemical-based elastomers.

In a 26 Nov statement, Covestro said that Dutch moulding company Polarttech successfully used the elastomer system in the production of sustainable parts for offshore wind power industry. 

The parts produced, it noted, show “very good hydrolysis resistance” for offshore application, and are “more durable than other elastomers such as rubber.”

The polyurethane system is also claimed to deliver high-performance elastomers with “even better mechanical properties” such as tensile strength and tear resistance compared to conventional cast polyurethane systems made from fossil feedstock. 

"The use of CO2 in chemical raw materials is a ground-breaking innovation that is in perfect harmony with our vision of recycling," said Thomas Braig, head of Covestro elastomers. 

Even more important, he said, is a “successful application in practical use.” 

Commenting on the use of the materials, Arthur Brouwers, CTO of Polarttech, said the newly developed solution, “surpasses Polarttech's previous system in terms of resilience and abrasion resistance.” 

Moreover, its processing is easier helped by a long pot life and detaching properties when the part is demoulded, Brouwers added. 

Covestro has developed a technology to produce polyurethane precursors from carbon dioxide in a proportion of up to 20% by weight. The cardyon-branded polyols have previously been used in the production of mattress and upholstry foams, elastic textiles and in special sports adhesive applications.