Use of polysilazanes for coating metal strips

Details Use of polysilazanes for coating metal strips Use of polysilazanes for coating metal strips

C - Chemistry, Metallurgy

09

D

C09D 183/16 (2006.01) C04B 35/589 (2006.01) C08G 77/62 (2006.01) C23C 18/12 (2006.01)

Patent

CA 2587504

A coating for metals containing a polysilazane solution or a mixture of polysilazanes of general formula (1) -(SiR'R"-NR" )n- (1) wherein R', R", R'" are identical or different and independently represent hydrogen or an optionally substituted alkyl-, aryl-, vinyl or (trialkoxysilyl)alkyl radical, wherein n is a whole number and n is dimensioned in such a way that polysilazane has an average molecular weight of 150 -150.000 g/mol, in a solvent and at least one catalyst. The invention also relates to a method for the production of the coating.

L'invention concerne un revêtement servant au revêtement de métaux et contenant une solution constituée d'un polysilazane ou d'un mélange de polysilazanes de formule générale -(SiR'R''-NR''')n- (1) dans un solvant, ainsi qu'au moins un catalyseur. Dans la formule (1), R', R'', R''' sont identiques ou différents et représentent, indépendamment l'un de l'autre, hydrogène ou un reste alkyle, aryle, vinyle ou (trialcoxysilyl)alkyle éventuellement substitué, et n est un nombre entier tel que le polysilazane présente un poids moléculaire moyen en nombre compris entre 150 et 150.000 g/mole. L'invention concerne également un procédé pour produire ce revêtement.

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