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Thursday, 19 September 2019
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Raw materials & technologies, Raw materials, Coatings binders

Biobased polyester polyols are water-resistant

Wednesday, 25 July 2012

Hydrolytically stable polyester polyols increase percentage of renewable carbon in PUDs significantly.

The new polyols are 100 % biobased

Source: Croda

The new polyols are 100 % biobased

Source: Croda

Polyurethanes have been used for many years to produce high performance materials such as solventborne coatings. However, though possible to formulate waterborne polyurethane systems, the widely used adipate polyester backbones often cause problems, such as reduction in storage stability and hydrolytic resistance. In addition, the slow water evaporation of polyurethane dispersions is seen as a drawback in certain applications.

At the European Coatings Conference "Polyurethanes for high-performance coatings” on 25-26 September, 2012, Eric Brouwer (Croda Industrial Specialties) will present a range of hydrolytically stable polyester polyols using biobased technology, that counter these deficits. The reduced number of ester bonds and the hydrophobic environment make these polyols practically immune to water, while keeping the resistance against UV, characteristic for polyesters. Their hydrophobic nature enables fast removal of water out of the system, shortening processing times dramatically. A 100 % biobased polyester polyol is now on the market which increases the percentage of renewable carbon in PUDs significantly to well over 60 %.

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