| 摘要 |
<p>The invention relates to coating agents having an antigraffiti effect. Said coating agents can be obtained according to a method consisting in condensing the organic silicon compounds of general formula (I): R<SUP>1</SUP><SUB>n</SUB>SIX<SUB>4-n</SUB>, wherein R<SUP>1 </SUP>represents a group comprising 1-20 carbon atoms, X represents an alkoxy radical having 1-20 carbon atoms or halogen and n represents an even number between 0-3. The different radicals X or R<SUP>1 </SUP>can be identical or different and/or the precondensates can be obtained from said components. At least 50 wt. % of the silicon compounds, in relation to the total weight of the used silicon compounds, is represented by the formula R<SUP>1</SUP>SiX<SUB>3</SUB>, wherein R<SUP>1 </SUP>and X have the above-cited meaning, in order to form polysiloxanes until the ratio of signals R<SUP>1</SUP>SiO(OH) and signals R<SUP>1</SUP>SiO<SUB>1,5 </SUB>measured by NMR-spectroscopy ranges from 0.6-4, and by adding compounds of formula (II) (R'')<SUB>u</SUB>Si(R')<SUB>t</SUB>(OR)<SUB>(4-t-u) </SUB>to said polysiloxane mixture, wherein R represents a group comprising 1-20 carbon atoms having at least 3 fluoro atoms. U is 1 or 2 and t is 0 or 1, R and R' are identical or different and represent a group comprising 1-20 carbon atoms. The also relates to plastic bodies which have coating which can be obtained by means of the coating agents.</p> |
