Patent ID: 8357431

Claim:
A method of protecting a surface of a workpiece, comprising the step of coating at least one surface of a workpiece with one or more amine-modified siloxanes, the one or more amine-modified siloxanes having at least one molecular unit I R a ⁢ X b ⁢ Si ⁢ ⁢ O ⁢ ( 4 - a - b ) 2 ( I ) and one molecular unit II R c ⁢ Si ⁢ ⁢ O ⁢ ( 4 - c ) 2 ( II ) where X independently at each occurrence is an amine-modified radical X 1 or a hydrophilic radical X 2 , and X 1 and X 2 occur at least once in the one or more amine-modified siloxanes, wherein the amine-modified radical X 1 is an amino-functional group of the following general formula —R 1 —O—R 2 —C(OH)H—CH 2 —N(R 4 ) 2 where R 1 and R 2 each independently of one another are a saturated or unsaturated, straight, branched or cyclic alkylene or alkenylene group having C 1 to C 18 carbon atom(s), and where appropriate may be substituted; and R 4 independently at each occurrence is hydrogen, a straight-chain, branched or cyclic C 1 to C 18 alkyl or alkenyl group, which where appropriate may be substituted; R independently at each occurrence is a saturated, unsaturated, straight-chain, branched or cyclic alkyl, alkenyl or alkoxy group having C 1 to C 18 carbon atoms, and where appropriate may be substituted; a is an integer 0, 1 or 2; b is an integer 1, 2 or 3, where a sum of a and b is 1, 2 or 3; c is an integer 0, 1, 2 or 3, wherein said coating step forms a surface coating with biocidal properties for protecting said workpiece.