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Wednesday, 18 September 2019
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Raw materials & technologies

The best of two worlds

Monday, 28 July 2014

Silane-urethane hybrid crosslinkers have been designed to generate multifunctional, scratch resistant coatings for different substrates

A range of silane-urethane hybrid crosslinkers has been designed by Tobias Unkelhäusser and his colleagues. Their objective was to generate multifunctional, scratch resistant coatings usable on a variety of substrates. Addition of one of their product to a 2K polyurethane automotive clearcoat greatly increased scratch resistance. An ambient-cure clearcoat applied over wood as well as plastic also showed very high scratch resistance.

Within the investigation a whole set of silane-urethane hybrid crosslinkers has been designed to generate scratch resistant coatings. 

These crosslinkers and binders can be used in automotive OEM and refinish applications and on many different substrates such as wood, plastic and metals or glass etc. Some of them cured even at ambient temperature.

Incorporation of these products into an existing 2K polyurethane clearcoat formulation had little effect on most physical properties but produced a considerable increase in scratch resistance. High levels of scratch resistance were also obtained on an ambient-cure clearcoat applied over wood.

Read more in the current issue of European Coatings Journal 07/08 • 2014

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