Henkel Ag & Company, Kgaa

Ralf Bätzgen

Johann Klein

Jan-Erik Damke

David Briers

A silylated polyurethane obtainable by a process comprising the following steps: (a) reacting at least one polyol with at least one triisocyanate to form a hydroxyl-terminated polyurethane prepolymer, and (b) reacting said polyurethane prepolymer with at least one isocyanatosilane of the formula (1): OCN&#x2014;R&#x2014;Si&#x2014;(X)(R), wherein m is 0, 1 or 2, each Ris independently from each other a hydroxyl group, an alkoxy group having 1 to 10 carbon atoms, an acyloxy group having 1 to 10 carbon atoms, or &#x2014;OCH(R)COOR, wherein Ris hydrogen or an alkyl group having 1 to 4 carbon atoms and Ris a straight-chain or branched alkyl group having 1 to 8 carbon atoms, each X is independently from each other and optionally substituted hydrocarbon group having 1 to 10 carbon atoms, which can be interrupted by at least one heteroatom, and R is a difunctional organic group, to endcap the hydroxyl groups on said prepolymer with said isocyanatosilane. The silylated polyurethanes are suitable for use in a preparation as an adhesive, sealant, or coating agent.

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Duesseldorf, Germany

Ralf Bätzgen