Basf Aktiengesellschaft

Basf Corporation

Basf Se Corporation

Michael Kutschera

Dieter Urban

Horst Weiss

Ines Pietsch

Cornelis Petrus Beyers

Guenter Klein

Stefan Kirsch

Petra Schoecker

Andreas Poppeq

Petra SCHÖCKER

An adhesive film which comprises at least two continuous polymer phases A and B each formed from a polymer or polymer mixture A (polymer A for short) and a polymer or polymer mixture B (polymer B for short) and which is obtainable by filming at least one of the polymers, A or B, initially in the form of an aqueous polymer dispersion.

Adhesive film having at least two continuous phases

The invention relates to coating agents, containing (A) at least 50 wt. %, (in relation to the content of non-volatile substances in said coating agent), of at least one compound (A1) and/or (A1') comprising at least two reactive groups of formula (I): &#x2014;X&#x2014;SiR&#x2033;x(OR&#x2032;)3-x, in which R&#x2032;=hydrogen, alkyl or cycloalkyl, whereby the carbon chain can be interrupted by non-adjacent oxygen, sulphur or NRa groups, Ra=alkyl, cycloalkyl, aryl or aralkyl, X=a linear and/or branched alkene or cycloalkene group comprising between 2 and 20 carbon atoms, R&#x2033;=alkyl, cycloalkyl, aryl or aralkyl, whereby the carbon chain can be interrupted by non-adjacent oxygen, sulphur or NRa groups, and x=0 to 2, (B) a catalyst for cross-linking the &#x2014;Si(OR&#x2032;)3-x units, and (C) an organic solvent or a mixture of organic solvents. According to the invention, during the curing of the coating agents, the reactive groups (I) are cross-linked in such a way, that the following characteristics are noted during the nanoindentation test on the cured coating: elastic recovery of volume &#x3e;86.5%; plastic deformation &#x3c;3.5%; brittle deformation &#x3c;10.0%.

Extremely scratch-resistant, highly elastic coating agents based on alkoxysilanes

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Limburgerhof, Germany

Michael Kutschera