C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 183/16 (2006.01) C03C 17/30 (2006.01)
Patent
CA 2552733
The invention relates to hydrophilic coating for surfaces, containing one or several polysilazanes and an ionic reagent or mixtures of ionic reagents. The polysilazane is, in particular, a polysilazane of formula 1, (SiR'R"-NR" )n- (1), wherein R', R", R" can be identical or different and are either hydrogen or organic or metalorganic radicals. n is measured in such a manner that the polysilazane has a numerical average molecular weight ranging from 150 - 150.000 g/mol. In a preferred embodiment, the polysilazane is a perhydropolysilazane (R'=R"=R" = H). The ionic reagent is, preferably, a salt of a carboxylic acid, in particular a hydroxycarboxylic acid, or a cationic or anionic silane, or an oligomer or polymer. The invention also relates to a method for the production of the above-mentioned hydrophilic coatings.
L'invention concerne un revêtement hydrophile destiné à des surfaces, qui contient un ou plusieurs polysilazanes et un réactif ionique ou des mélanges de réactifs ioniques. Ce polysilazane est notamment un polysilazane de formule (1), (SiR'R"-NR"')n-, dans laquelle R', R", R" peuvent être identiques ou différents et représenter hydrogène ou des restes organiques ou organométalliques et n est calculé de sorte que le polysilazane présente un poids moléculaire moyen en nombre compris entre 150 et 150 000 g/mol. Dans un mode de réalisation préféré, le polysilazane est un perhydropolysilazane (R'=R"=R" = H). Le réactif ionique est de préférence un sel d'un acide carboxylique, notamment d'un acide hydroxycarboxylique, ou un silane cationique ou anionique, ou un oligomère ou un polymère. L'invention concerne en outre un procédé pour produire lesdits revêtements hydrophiles.
Dierdorf Andreas
Liebe Hubert
Motz Guenter
Wacker Andreas
Clariant International Ltd
Fetherstonhaugh & Co.
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