Patent ID: 6500554
Filing Date: 2002-12-31
Classification: B32B,C09D,Y10S,Y10T

Abstract:
An extrusion-coated metal profile prepared by a process comprising:1) applying to a surface of a metal a mixture which comprises an organosilane composition which is prepared from a) Q mols. of alkoxysilanes which have a functional group and have the formula: Aâ€”Si(R1)y(OR*)3-y, â€ƒâ€ƒI andb) M mols of alkoxysilanes selected from the group consisting of &agr;) trialkoxysilanes of the formula: R2â€”Si(OR**)3 â€ƒâ€ƒII and/or selected from the group consisting of &bgr;) dialkoxysilanes of the formula: R3R4Si(OR***)2 â€ƒâ€ƒIII and/or selected from the group consisting of &ggr;) alkoxy compounds of the formula Me(OR****)n,â€ƒâ€ƒIV wherein A is a substituent which has, bonded directly or via an aliphatic or aromatic hydrocarbon radical to silicon, thereto at least one amino, alkylamino, dialkylamino, amido, epoxy, acryloxy, methacryloxy, cyano, isocyanato, ureido, thiocyanato, mercapto, sulfane or halo group, R1 is methyl, ethyl or A which is defined above, y is 0 or 1, R*, R**, R*** and R****, independently of one another, are an alkyl group having from 1 to 8 carbon atoms or a corresponding alkyl group which is substituted by an alkyl poly(ethylene glycol) radical, R2, R3 and R4, independently of one another, are an alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl or aromatic group, in each case having not more than 18 carbon atoms, or said group is partially fluorinated or perfluorinated and/or is substituted by alkyloxy and/or by aryloxy groups, Me is selected from the group consisting of Si (n=4), Ti (n=4), Zr (n=4), Al (n=3) and Zn (n=2), with the proviso that the molar ratio of M and Q is 0&lE;M/Q&lE;20, on average, at least 2.4 alkoxy groups OR*, OR**, OR*** or, respectively, OR****, are present in the mixture of the compounds I to IV for each silicon atom and metal atom, and if concomitant use is made of one of the metal compounds IV, the atomic ratio of metal/Si in the mixture of compounds I to IV is not more than 4:6; and 2) extruding a melt of a polyamide molding composition onto the surface thus treated and dried.