Paint compositions containing silver metal flake pigment
AssigneeBASF SE
InventorsSol Panush, James M. Gelmini
Life of this patent
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Abstract
Acrylic coating compositions containing silver metallic flake pigments are disclosed. The coatings are particularly adapted for use in automotive top coat systems as the base coat of a pigmented base coat/clear top coat coating system. The coating compositions have a hydroxyl content of less than about 8.0 wt. %. The resulting coating compositions when dried or cured to hard durable films do not exhibit discoloration associated with silver flake coatings.
Claims12
A film-forming coating composition comprising
- a thermosetting acrylic resin wherein the acrylic resin has minimal hydroxyl functionality, said coating composition having less than 8.0 wt. % hydroxyl functionality;
- and
- silver metal flake,
- the coating composition, when cured to a hard film, exhibiting no discoloration due to the presence of the silver flake.
A substrate coated with at least one layer of a film-forming coating composition, wherein the coating composition comprises
- a thermosetting acrylic resin wherein the acrylic resin has minimal hydroxyl functionality, said coating composition having less than 8.0 wt. % hydroxyl functionality;
- and
- silver metal flake,
- the coating composition, when cured to a hard durable film, exhibiting no discoloration due to the presence of the silver flake.
In a method of coating a substrate with a coating of a thermosetting film-forming coating composition by applying said coating composition to a substrate, the improvement comprising using a film-forming coating composition comprising
- a thermosetting acrylic resin having minimal hydroxyl functionality, wherein the coating composition has less than 8.0 wt. % hydroxyl functionality;
- and
- silver metal flake;
- the coating composition, when cured to a hard durable film, exhibiting no discoloration due to the presence of the silver flake.
A film-forming coating composition comprising
- a thermoplastic acrylic resin having minimal hydroxyl functionality, wherein the acrylic resin and coating composition has less than 8.0 wt. % hydroxyl functionality;
- and
- silver metal flake;
- the coating composition, when cured to a hard durable film, exhibiting no discoloration due to the presence of the silver flake.
A substrate coated with at least one layer of a film-forming coating composition, wherein the coating composition comprises
- a thermoplastic acrylic resin having minimal hydroxyl functionality, wherein the coating composition has less than 8.0 wt. % hydroxyl functionality;
- and
- silver metal flake;
- the coating composition, when cured to a hard durable film, exhibiting no discoloration due to the presence of the silver flake.
In a method of coating a substrate with a coating of a thermoplastic film-forming coating composition by applying said coating composition to a substrate, the improvement comprising using a film-forming composition comprising
- a thermoplastic acrylic resin having minimal hydroxyl functionality, wherein the coating composition has less than 8.0 wt. % hydroxyl functionality;
- and
- silver metal flake;
- the coating, when cured to a hard durable film, exhibiting no discoloration due to the presence of the silver flake.
Dependencies are inferred from the claim text.