Tuesday - September 5, 2017

Covestro publishes environmental life-cycle assessment of waterborne polyurethane technology

New data shows INSQIN® reduces the carbon footprint of textile coating by half

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What if the textile converted completely to waterborne polyurethanes?

In a recent life-cycle assessment (LCA), Covestro’s INSQIN® proves to be a more sustainable way to produce coated textiles than conventional technologies.

The study found that using waterborne polyurethane (PU) technology for the manufacture of PU synthetic, a key material in the textiles sector, substantially reduces the carbon footprint of the material, as compared to conventional, solvent-based technology. The assessment showed that, from the cradle to material factory gate, the Global Warming Potential for 1,000 square meters of waterborne PU synthetic is 45 percent less than that of solvent-based PU synthetic(1). An independent third party was engaged to conduct a critical review of the LCA study and results in accordance with International Organization for Standardization (ISO) standards 14040:2006 and ISO 14044:2006.

Nick Smith, Covestro’s Global Head of Textile Coatings, says: “The LCA provides an extra layer of assurance in the environmental performance of INSQIN®. It shows brands that this technology can help them reach their sustainability targets. Achievements in carbon footprint reduction will be important to not only fashion and sportswear brands, but also the automotive and furniture industries.”

The LCA delivers high-quality data on the environmental benefits of waterborne PU. In addition, the technology offers health and safety benefits, altogether enabling customers to make increasingly informed decisions on PU material sourcing.

The study compared a comprehensive range of parameters to assess the environmental performance of waterborne PU from the extraction of raw materials to coated fabric production, versus that of the conventional technology, which involves the use of the solvent dimethylformamide (DMF).

Reducing carbon footprint and acidification
According to the results of the LCA, 1,000 square meters of PU synthetic made with INSQIN® has a Global Warming Potential of 6,900 kilogrammes CO2-eq, compared to 12,700 kilogrammes CO2-eq in the case of solvent-based PU leather.

The impact of this reduction is so significant that if the entire textile industry switched to using Covestro’s waterborne PU technology, the reduction of greenhouse gas emissions would be equivalent to taking every car off the road in Beijing, or in London, Hong Kong and Los Angeles combined.

While INSQIN® itself has a significantly lower carbon footprint than solventborne equivalents, the detailed study revealed that 85 percent of the reduction in Global Warming Potential is due to the lower energy consumption of the dry textile coating process that is enabled by the waterborne PU, and that replaces conventional wet processing. In other words, the real benefit of the technology lies in the process changes it makes possible.

Using INSQIN® to coat textiles with PU also has the potential to reduce acidification in our waters and soil by 20 percent, compared to conventional technology.

Reducing water consumption
According to Covestro’s previous internal study, the production of PU synthetics with INSQIN® uses 95 percent less process water than with conventional PU. The water savings achieved can have significant social impact on water-scarce manufacturing countries. If the entire textile industry switched to INSQIN®, enough water would be saved everyday to meet the daily water use of nearly 340,000 people in China.

This work demonstrates how innovation in chemicals can bring far-reaching benefits by enabling change in process technologies to bring about significant progress in overall innovation in the textiles industry.

Dr. Lydia Simon, Global Sustainability Manager for Coatings, Adhesives & Specialties at Covestro, says: “Life cycle thinking is crucial if we are to overcome key challenges such as climate change. Life cycle studies help to quantify the potential of technologies to reduce environmental impacts and thus contribute to more sustainable solutions.”

(1) Global warming potential,commonly known as carbon footprint, refers to the capacity to influence changes in the global average surface-air temperature and subsequent change in various climate parameters and their effects, such as storm frequency and intensity, rainfall intensity and frequency of flooding.

About Covestro:
With 2016 sales of EUR 11.9 billion, Covestro is among the world’s largest polymer companies. Business activities are focused on the manufacture of high-tech polymer materials and the development of innovative solutions for products used in many areas of daily life. The main segments served are the automotive, construction, wood processing and furniture, and electrical and electronics industries. Other sectors include sports and leisure, cosmetics, health and the chemical industry itself. Covestro has 30 production sites worldwide and employs approximately 15,600 people (calculated as full-time equivalents) at the end of 2016.

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This release may contain forward-looking statements based on current assumptions and forecasts made by Covestro AG. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here. These factors include those discussed in Covestro’s public reports, which are available at The company assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.