Evonik Degussa Gmbh

Hans Goerlitzer

Rainer Lomoelder

Markus Hallack

Tobias Unkelhaeusser

Wiebke Stache

The present invention relates to a coating material comprising at least one aliphatic or cycloaliphatic polyisocyanate having an NCO functionality of at least 2, preferably 2.8 to 6, optionally at least one binder, preferably a hydroxyl-containing binder, at least one adduct of an isocyanatotrialkoxysilane and a polyhydric alcohol, with more than 90, more preferably more than 95, most preferably more than 99 percent of the hydroxyl groups in the polyhydric alcohol having been converted by reaction with the isocyanatotrialkoxysilane, and less than 0.1 wt % of the isocyanate groups from the isocyanatotrialkoxysilane being reactive in the adduct, at least one catalyst selected from the group consisting of Lewis acids, phosphoric acid or phosphorous acid and esters thereof, blocked or non-blocked sulphonic acids, sulphuric acid, carboxylic acids having a melting point &#x3e;60&#xb0; C. and tetraalkylammonium carboxylates, optionally at least one auxiliary, preferably at least one further crosslinker, and/or adjuvant, and optionally organic solvents, and also to a process comprising providing, applying to a surface and curing the coating material, to a coating obtainable by curing the coating material, and to use of the coating material for coating a metal, glass, plastic or wood surface.

Coating material with high scratch resistance

The present invention relates to a copolymer of the formula where A, B, and D are independently of one another an aliphatic (cyclo)alkylene radical, R is a C-Calkyl radical, and 3&#x2266;x&#x2266;10. The present invention also relates to a process for preparing the copolymer, to its use and also to a coating composition and a coating formulation containing the copolymer.

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Dortmund, Germany

Hans Goerlitzer