Covestro Deutschland Ag

Qinglan Liu

Dieter Mager

Limin Cheng

The present invention relates to a two-component system comprising a component A) comprising at least one polymeric polyol which has an OH content of &#x2264;4.5 wt %, based on the total solids content of the polymeric polyol, and a component B) comprising at least one polyisocyanate which has a number average isocyanate group functionality of &#x2265;4.0 to &#x2264;10.0, based on the total solids content of the polyisocyanate, a fraction of &#x2264;25 wt %, based on the total solids content of the polyisocyanate, of oligomers containing isocyanate groups and having a number-average molecular weight of &#x2264;780 g/mol, and an isocyanurate group fraction of &#x2265;5 mol % to &#x2264;70 mol %, based on the total amount of isocyanurate groups and allophanate groups in the polyisocyanate. The invention further relates to a method for producing a coating on a substrate, to the coating obtainable by this method, and to the coated substrate.

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Shanghai, China

Qinglan Liu