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US 2001/0023537 A1Published application
Process for producing an extrusion-coated metal article
AssigneeDegussa-Huels Aktiengesellschaft
InventorsKlaus Gahlmann, Walter Hellermann
Life of this patent
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Abstract
An extrusion-coated metal article is prepared by applying a mixture which comprises an organosilane composition to a metal surface, and then extruding a melt of a polyamide molding composition onto the coated surface thus treated and dried.
Claims23
An extrusion-coated metal profile prepared by a process comprising:
- 1) applying 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:
- A—Si(R1)y(OR*)3-y, and I
- b) M mols. of alkoxysilanes selected from the group consisting of α) trialkoxysilanes of the formula:
- R2—Si(OR**)3 II
- and/or from the group consisting of β) dialkoxysilanes of the formula:
- R3R4Si(OR**)2 III
- and/or from the group consisting of γ) alkoxy compounds of the formula
- Me(OR****)n, IV
- 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 a group of this type which 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) and metals, such as 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≦M/Q≦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, respectively, metal atom, and if concomitant use is made of one of the metal compounds mentioned as compound 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.
17 more elements
A process for producing an extrusion-coated metal article, which comprises:
- extruding a mixture of:
- a) Q mols. of alkoxysilanes which have a functional group and have the formula:
- A—Si(R1)y(OR*)3-y I
- and
- b) M mols. of alkoxysilanes selected from the group consisting of α) trialkoxysilanes of the formula:
- R2—Si(OR**)3 II
- and/or from the group consisting of β) dialkoxysilanes of the formula:
- R3R4Si(OR***)2 III
- and/or from the group consisting of γ) alkoxy compounds of the formula:
- Me(OR****)n, IV
- where 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 is as 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 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 a group one of said groups which 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) and metals, such as 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≦M/Q≦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, respectively, metal atom, and if concomitant use is made of one of the metal compounds mentioned as compound 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.
18 more elements
Dependencies are inferred from the claim text.