Metal effect pigments comprising a mixed inorganic/organic layer, method for the production of such metal effect pigments, and use thereof
AssigneeEckart GmbH
InventorsStefan Trummer, Frank Henglein, Mariel Brauer
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Abstract
The invention relates to metallic effect pigments with coating, comprising a platelet-shaped substrate, where the coating comprises at least one hybrid inorganic/organic layer, the hybrid layer having at least partly an inorganic network that has one or more inorganic oxide components, and having at least one organic component, the organic component being at least partly an organic oligomer and/or polymer which is covalently bonded at least partly to the inorganic network via one or more organic network formers. The invention further relates to a method of producing these metallic effect pigments, and to their use.
Claims57
Metallic effect pigments with coating, comprising a platelet-shaped substrate, wherein the coating comprises at least one hybrid inorganic/organic layer, the hybrid layer having at least partly an inorganic network that has one or more inorganic oxide components, and having at least one organic component, the organic component being at least partly an organic oligomer and/or polymer which is covalently bonded at least partly to the inorganic network via one or more organic network formers, wherein the inorganic network is interpenetrated by at least one selected from the group consisting of at least partly covalently bonded organic oligomers and at least partly covalently bonded organic polymers, wherein said coating is produced by applying a coating composition to platelet-shaped metallic substrates, wherein said coating composition is formed by reacting at least one inorganic network former and at least one organic network former and at least one reactive organic component in a liquid phase, wherein the at least partial covalent bonding of inorganic oxide component and organic oligomer and/or polymer is accomplished at least partly through one or more organic network formers of the general formula II:
- (R1O)n(R2O)m(R3O)oMX(k-n-m-o)
- where the compound of the general formula II has at least one hydrolyzable group X after whose hydrolysis a covalent bond of organic network former to the inorganic network forms, at least one organic radical R1 is a reactive organic group which convalently bonds to the organic oligomer and/or polymer, and R2 and R3 independently of one another is an organic group which is covalently bonded to the organic oligomer and/or polymer, or R2 or R3 independently of one another are non-reactive,
- where
- k is the formal oxidation number of M,
- M is Al, Zr or Ti,
- n is an integer from 1 to (k−1),
- m is an integer from 0 to (k−2),
- o is an integer from 0 to (k−2), and
- where n+m+o is an integer from 1 to (k- 1).
A method of producing metallic effect pigments with hybrid inorganic/organic layer, comprising the following steps:
- reacting at least one inorganic network former and at least one organic network former and at least one reactive organic component in a liquid phase to form a coating composition,
- applying the coating composition to platelet-shaped metallic substrates as a hybrid layer, the platelet-shaped metallic substrates being added to the liquid phase before, during or after the addition or reaction of the at least one inorganic network former and of the at least one organic network former and of the at least one reactive organic component,
- the hybrid layer having at least partly an inorganic network that has one or more inorganic oxide components, and having at least one organic component, the organic component at least partly being at least one of an organic oligomer and an organic polymer which is covalently bonded at least partly to the inorganic network, wherein the inorganic network is interpenetrated by at least one selected from the group consisting of at least partly covalently bonded organic oligomers and at least partly covalently bonded organic polymers, wherein the at least partial covalent bonding of inorganic oxide component and organic oligomer and/or polymer is accomplished at least partly through one or more organic network formers of the general formula II:
- (R1O)n(R2O)m(R3O)oMX(k-n-m-o) (II)
- where the compound of the general forumla II has at least one hydrolyzable group X after whose hydrolysis a covalent bond of organic network former to the inorganic network forms, at least one organic radical R1 is a reactive organic group which covalently bonds to the organic oligomer and/or polymer, and R2 and R3 independently of one another is an organic group which is covalently bonded to the organic oligomer and/or polymer, or R2 or R3 independently of one another are non-reactive,
- where
- k is the formal oxidation number of M,
- M is Al, Zr or Ti,
- n is an integer from 1 to (k−1),
- m is an integer from 0 to (k−2),
- o is an integer from 0 to (k−2), and
- where n+m+o is an integer from 1 to (k- 1).
Dependencies are inferred from the claim text.