Biodegradable water-based textile coating – Durability throughout the product cycle: Impranil® DLN-SD


LEVERKUSEN, Germany – March 15, 2019 – To assess the durability of a textile coating, the entire product cycle must be taken into account: the source of raw materials, the production process and the application. Equally important, however, is what happens at the end of its useful life. This is a major advantage when substances are biologically broken down by microorganisms. Covestro offers Impranil® DLN-SD, a water-based polyurethane (PU) dispersion, which can be used to make biodegradable textile coatings1.

“Covestro’s raw materials enable the production of biodegradable coatings, but also composite solutions,” said Dr Torsten Pohl, Global Head of Textile Coatings at Covestro. “As a result, they contribute to a modern circular economy. The tests show that more than half of the PU dispersion is degraded in 28 days under the special conditions of the OECD 301 standard. Therefore, the degradation rate is considerably higher than that of polyacrylates and other film-forming agents. Covestro presents the test results at the 2019 European Coatings Fair from March 19 to 21 in Nuremberg.

Excellent properties – different applications

Textile coverings based on Impranil DLN-SD are pleasantly soft and dry; in addition, they are resistant to abrasion and washing and extremely flexible. The dispersion is also a good film former and is highly compatible with nitrile rubber (NBR). Therefore, it is also useful in other product applications, for example in gloves and latex packaging.

Since Impranil DLN-SD is an aliphatic PU dispersion, it can be used to formulate highly lightfast coatings. The dispersion can be used in adhesive, intermediate and surface coatings. Biodegradable coatings based on Impranil DLN-SD have the potential to follow the trend towards more sustainable products by also considering end-of-life solutions.

  1. According to the first internal tests without the addition of additives, crosslinking agents and pigments.

Posted on March 15, 2019

Source: Covestro SA

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