Thermally stabilised conductive polymer coatings
AssigneeThe Boeing Company
InventorsPatrick J. KINLEN, Eric Alan BRUTON, Thomas Matthew KOHL, Maria ESPIRITU
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Abstract
The present disclosure generally relates to coatings and compositions comprising conductive polymers. The present disclosure also relates to thermally stable coatings and compositions comprising solution processable polyaniline conducting polymers and thermal stability agents, and to processes for preparing the coatings and compositions.
Claims53
A liquid formulation comprising:
- a solution processable polyaniline conducting polymer in an organic solvent,
- one or more first thermal stability agents selected from an alkali metal salt, and optionally an amphoteric metal oxide, and
- one or more of second thermal stability agents selected from an antioxidant,
- wherein the combined amount of the one or more first thermal stability agents (as a weight % of total formulation) is about 2 wt % to about 7 wt %,
- wherein the total amount of the first and second thermal stability agents (as a weight % of total formulation) is less than about 9 wt %,
- wherein the first and second thermal stability agents are present in the organic solvent, and
- wherein the polyaniline conducting polymer solution has greater than 95% of a polyaniline salt dissolved in the organic solvent.
A liquid formulation consisting of:
- a solution processable polyaniline conducting polymer in an organic solvent,
- one or more first thermal stability agents selected from an alkali metal salt, and optionally an amphoteric metal oxide,
- one or more second thermal stability agents selected from an antioxidant, and
- one or more film formers,
- wherein the combined amount of the one or more first thermal stability agents (as a weight % of total formulation) is about 2 wt % to about 7 wt %,
- wherein the total amount of the first and second thermal stability agent (as a weight % of total formulation) is less than about 9 wt %,
- wherein the first and second thermal stability agents are present in the organic solvent, and
- wherein the polyaniline conducting polymer solution has greater than 95% of a polyaniline salt dissolved in the organic solvent.
The formulation according to any one of claims 1 to 15, wherein the antioxidant is selected from one or more hindered phenols.
The formulation according to any one of claims 1 to 33, wherein any one or more of the first and second thermal stability agents present in the liquid formulation is provided as a suspension or a solid to the liquid formulation.
A process for preparing a liquid formulation, comprising the steps of:
- mixing (i) one or more first thermal stability agents selected from an alkali metal salt, and optionally an amphoteric metal oxide and (ii) one or more second thermal stability agents selected for an antioxidant with (iii) a polyaniline conducting polymer that is dissolved in an organic solvent, to form the liquid formulation,
- wherein the polyaniline conducting polymer is an organic solvent soluble polyaniline conducting polymer salt made in-situ by polymerising an aniline monomer with a protonic acid in the organic solvent,
- wherein the combined amount of the one or more first thermal stability agents (as a weight % of total formulation) is about 2 wt % to about 7 wt %,
- wherein the total amount of the first and second thermal stability agent (as a weight % of total formulation) is less than about 9 wt %, and
- wherein the polyaniline conducting polymer solution has greater than 95% of a polyaniline salt dissolved in the organic solvent.
A substrate comprising one or more coating layers, wherein at least one of the coating layers comprises a formulation as defined by any one of claims 1 to 439.
A coating applied to an optionally coated substrate, wherein the coating comprises:
- a polyaniline conducting polymer, one or more first thermal stability agents selected from an alkali metal salt, and optionally an amphoteric metal oxide, and one or more of second thermal stability agents selected from an antioxidant,
- wherein the combined amount of the one or more first thermal stability agents (as a weight % of solid film) is about 4 wt % to about 15 wt %, and
- wherein the total amount of the first and second thermal stability agents (as a weight % of solid film) is less than about 20 wt %.
Dependencies are inferred from the claim text.