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US 5,332,767 AGranted
Synthetic resin-coated metal pigment, process for the production thereof and use thereof
AssigneeEckart-Werke Standard Bronzpulver-Werke Carl Eckart GmbH & Co.
InventorsWolfgang Reisser, Guenter Sommer
Life of this patent
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Abstract
A synthetic resin-coated metal pigment such as aluminum pigment has a silne coating covalently bonded to the surface of the pigment particles, and a three-dimensionally cross-linked synthetic resin coating covalently bonded to the siloxane coating. Production of the coated pigment comprises production of a silicon-organic coating on the pigment surface and then conversion of that coating into a siloxane coating by hydrolysis and condensation, followed by reaction with a low-molecular compound for forming the cross-linked synthetic resin coating. A range of uses of the coated pigment is also set forth.
Claims29
A synthetic resin-coated pigment of non-oxidized elemental metal having a protective sealing structure, comprising
- a siloxane coating covalently bonded to the surface of said elemental metal pigment particles, the siloxane coating having a minimum thickness which corresponds to a monomolecular covering on the surface of said elemental pigment particles, said siloxane coating being formed from a silane derivative silicon-organic compound having at least one organic reactive group selected from the group consisting of amino, epoxy, acryl, methacryl, vinyl and mercapto, and
- a three dimensionally cross-linked synthetic resin coating covalently bonded to the siloxane coating, said synthetic resin comprising reaction product of at least one low molecular weight, cross-likable compound, containing functional groups selected from the group consisting of epoxy, isocyanate, phenol, amine, acryl, methacryl, vinyl, allyl, olefin and isocyanate, reacted with said siloxane coating,
- wherein said silicon-organic compound organic reactive group is
- amino, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and phenol;
- epoxy, when said low molecular weight compound functional groups are amine;
- mercapto, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and olefin;
- or
- is a reactive group selected from the group consisting of acryl, methacryl and vinyl, when said low molecular weight compound functional groups are selected from the group consisting of acryl, methacryl, vinyl and allyl.
5 more elements
A synthetic resin-coated pigment of non-oxidized elemental metal having a protective sealing structure, comprising
- a siloxane coating covalently bonded to the surface of said elemental metal pigment particles, the siloxane coating having a minimum thickness which corresponds to a monomolecular covering on the surface of said elemental metal pigment particles, said siloxane coating being formed from a silane-derivative silicon-organic compound having at least one organic reactive group selected from the group consisting of amino, epoxy, acryl, methacryl, vinyl and mercapto, and
- a three-dimensionally cross-linked synthetic resin coating covalently bonded to the siloxane coating, said synthetic resin comprising reaction product of at least one low molecular weight, cross-linkable compound, containing functional groups selected from the group consisting of epoxy, isocyanate, phenol, amine, acryl, methacryl, vinyl, allyl, olefin and isocyanate, reacted with said siloxane coating,
- wherein said silicon-organic compound organic reactive group is
- amino, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and phenol;
- epoxy, when said low molecular weight compound functional groups are amine;
- mercapto, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and olefin;
- or
- is a reactive group selected from the group consisting of acryl, methacryl and vinyl, when said low molecular weight compound functional groups are selected from the group consisting of acryl, methacryl, vinyl and allyl,
- said elemental metal pigment comprising 85% by weight or greater of said synthetic resin coated elemental metal pigment.
6 more elements
A synthetic resin-coated non-oxidized elemental metal pigment comprised of aluminum particles, having
- a protective sealing structure comprising a siloxane coating covalently bonded to the surface of said aluminum particles, the siloxane coating having a minimum thickness which corresponds to a monomolecular covering on the surface of said aluminum particles, said siloxane coating being formed from a silane-derivative silicon-organic compound having at least one organic reactive group selected from the group consisting of amino, epoxy, acryl, methacryl, vinyl and mercapto, and
- a three-dimensionally cross-linked synthetic resin coating covalently bonded to the siloxane coating, said synthetic resin comprising reaction product of at least one low molecular weight, cross-linkable compound, containing functional groups selected from the group consisting of epoxy, isocyanate, phenol, amine, acryl, methacryl, vinyl, allyl, olefin and isocyanate, reacted with said siloxane coating,
- wherein said silicon-organic compound organic reactive group is
- amino, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and phenol;
- epoxy, when said low molecular weight compound functional groups are amine;
- mercapto, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and olefin;
- or
- is a reactive group, selected from the group consisting of acryl, methacryl and vinyl, when said low molecular weight compound functional groups are selected from the group consisting of acryl, methacryl, vinyl and allyl,
- said aluminum pigment comprising 85% by weight or greater of said synthetic resin coated elemental metal pigment.
6 more elements
A water-based coating comprising
- a synthetic resin-coated elemental metal pigment having a siloxane coating covalently bonded to the surface of the metal pigment particles, the siloxane coating having a minimum thickness which corresponds to a monomolecular covering on the surface of the metal pigment particles, said siloxane coating being formed from a silane-derivative siliconorganic compound having at least one organic reactive group selected from the group consisting of amino, epoxy, acryl, methacryl, vinyl and mercapto, and
- a three-dimensionally cross-linked synthetic resin coating covalently bonded to the siloxane coating, said synthetic resin comprising reaction product of at least one low molecular weight, cross-linkable compound, containing functional groups selected from the group consisting of epoxy, isocyanate, phenol, amine, acryl, methacryl, vinyl, allyl, olefin and isocyanate, reacted with said siloxane coating,
- wherein said silicon-organic compound organic reactive group is
- amino, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and phenol;
- epoxy, when said low molecular weight compound functional groups are amine;
- mercapto, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and olefin;
- or
- is a reactive group selected from the group consisting of acryl, methacryl and vinyl, when said low molecular weight compound functional groups are selected from the group consisting of acryl, methacryl, vinyl and allyl.
5 more elements
A water-based ink comprising
- a synthetic resin-coated elemental metal pigment having a siloxane coating covalently bonded to the surface of the metal pigment particles, the siloxane coating having a minimum thickness which corresponds to a monomolecular covering on the surface of the metal pigment particles, said siloxane coating being formed from a silane-derivative silicon-organic compound having at least one organic reactive group selected from the group consisting of amino, epoxy, acryl, methacryl, vinyl and mercapto, and
- a three-dimensionally cross-linked synthetic resin coating covalently bonded to the siloxane coating, said synthetic resin comprising reaction product of at least one low molecular weight, cross-linkable compound, containing functional groups selected from the group consisting of epoxy, isocyanate, phenol, amine, acryl, methacryl, vinyl, allyl, olefin and isocyanate, reacted with said siloxane coating,
- wherein said silane-organic compound organic reactive group is
- amino, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and phenol;
- epoxy, when said low molecular weight compound functional groups are amine;
- mercapto, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and olefin;
- or
- is a reactive group selected from the group consisting of acryl, methacryl and vinyl, when said low molecular weight compound functional groups are selected from the group consisting of acryl, methacryl, vinyl and allyl.
5 more elements
A wet-lacquer for electrostatic lacquering comprising
- a synthetic resin-coated elemental metal pigment having a siloxane coating covalently bonded to the surface of the metal pigment particles, the siloxane coating having a minimum thickness which corresponds to a monomolecular covering on the surface of the metal pigment particles, said siloxane coating being formed from a silane-derivative siliconorganic compound having at least one organic reactive group selected from the group consisting of amino, epoxy, acryl, methacryl, vinyl and mercapto, and
- a three-dimensionally cross-linked synthetic resin coating covalently bonded to the siloxane coating, said synthetic resin comprising reaction product of at least one low molecular weight, cross-linkable compound, containing functional groups selected from the group consisting of epoxy, isocyanate, phenol, amine, acryl, methacryl, vinyl, allyl, olefin and isocyanate, reacted with said siloxane coating,
- wherein said silane-organic compound organic reactive group is
- amino, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and phenol;
- epoxy, when said low molecular weight compound functional groups are amine;
- mercapto, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate an olefin;
- or
- is a reactive group selected from the group consisting of acryl, methacryl and vinyl, when said low molecular weight compound functional groups are selected from the group consisting of acryl, methacryl, vinyl and allyl.
5 more elements
A powder lacquer for electrostatic lacquering comprising
- a synthetic resin-coated elemental metal pigment having a siloxane coating covalently bonded to the surface of the metal pigment particles, the siloxane coating having a minimum thickness which corresponds to a monomolecular covering on the surface of the metal pigment particles, said siloxane coating being formed from a silane-derivative silicon-organic compound having at least one organic reactive group selected from the group consisting of amino, epoxy, acryl, methacryl, vinyl and mercapto, and
- a three-dimensionally cross-linked synthetic resin coating covalently bonded to the siloxane coating, said synthetic resin comprising reaction product of at least one low molecular weight, cross-linkable compound, containing functional groups selected from the group consisting of epoxy, isocyanate, phenol, amine, acryl, methacryl, vinyl, allyl, olefin and isocyanate, reacted with said siloxane coating,
- wherein said silane-organic compound organic reactive group is
- amino, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and phenol;
- epoxy, when said low molecular weight compound functional groups are amine;
- mercapto, when said low molecular weight compound functional groups are selected from the group consisting of epoxy, isocyanate and olefin;
- or
- is a reactive group selected from the group consisting of acryl, methacryl and vinyl, when said low molecular weight compound functional groups are selected from the group consisting of acryl, methacryl, vinyl and allyl.
5 more elements
A process for the production of a synthetic resin-coated metal pigment wherein the surface of the pigment particles is treated with a silicon-organic compound which can be reacted to provide a siloxane and which contains at least one organic reactive grouping;
- the silicon-organic coating on the pigment particles is converted using a hydrolysis catalyst selected from the group consisting of phosphonic acids and phosphoric acids and with the addition of water by hydrolysis and subsequent condensation into a siloxane coating;
- and the siloxane coating is reacted with at least one low-molecular compound which is reactable with said reactive grouping, under such conditions that a three-dimensionally cross-linked synthetic resin coating is formed.
Dependencies are inferred from the claim text.