Polyaniline coating composition
AssigneeRohm and Haas Company
InventorsMichael DeWayne Kelly, Thomas Glenn Madle, Paul Ralph Van Rheenen
Life of this patent
Estimating the term…
Abstract
A coating composition including a polyaniline particle and a binder is provided. The polyaniline particle contains a core polymer particle with strong acid groups and an attached polyaniline polymer, and has a particle diameter in a select range. Coatings prepared from the coating composition may be employed to provide corrosion resistance to metal substrates. A process for preparing the polyaniline particle and an article including a coating prepared from the coating composition are also provided.
Claims10
A coating composition comprising:
- a) a polyaniline particle comprising:
- i) a core polymer particle in an amount from 33% to 91% by weight of the polyaniline particle comprising strong acid groups derived from the polymerization of one or more ethylenically unsaturated strong acid monomers;
- and
- ii) a polyaniline polymer attached to said core polymer particle;
- wherein said polyaniline particle has an average particle diameter of less than or equal to 10 μm;
- and
- b) a binder.
A polyaniline particle comprising:
- a) a core particle in an amount from 33% to 91% by weight of the polyaniline particle comprising strong acid groups derived from the polymerization of one or more ethylenically unsaturated strong acid monomers;
- and
- b) a polyaniline polymer attached to said core polymer particle;
- wherein said polyaniline particle has an average particle diameter of less than or equal to 10 μm.
A process for preparing a polyaniline particle, comprising the steps of:
- a) preparing a core polymer particle in an amount of 33% to 91% by weight of the polyaniline particle comprising strong acid groups derived from one or more unsaturated strong acid monomers, wherein said core polymer particle has an average particle diameter of less than or equal to 10 μm;
- b) contacting said core polymer particle with at least one aniline monomer selected from the group consisting of aniline and aniline derivatives;
- c) allowing said aniline monomer to complex with said core polymer particle;
- and
- d) polymerizing said aniline monomer complexed with said core polymer particle to provide said polyaniline particle;
- wherein said polyaniline particle has a particle diameter of less than or equal to 10 μm.
An article comprising a coating prepared from a coating composition:
- a) a polyaniline particle comprising:
- i) a core polymer particle in an amount from 33% to 91% by weight of the polyaniline particle comprising strong acid groups derived from the polymerization of one or more ethylenically unsaturated strong acid monomers;
- and
- ii) a polyaniline polymer attached to said core polymer particle;
- wherein said polyaniline polymer has an average particle diameter of less than or equal to 10 μm;
- and
- c) a binder.
Dependencies are inferred from the claim text.