JP-2026514245-A - Adhesive coatings for metal surfaces and related methods

Abstract

This disclosure describes curable coating compositions and methods for coating the surfaces of objects such as metal objects. The coating compositions may include organic and/or inorganic solid adsorbents and may provide a durable curable coating layer that can be used to adsorb specific molecules such as carbon dioxide or water onto the surface of a metal object.

Inventors

• パバン シタウラ
• ムスタファ スークリ
• ジェフリー メシャム

Assignees

• リサーチ トライアングル インスティテュート

Dates

Publication Date

20260507

Application Date

20240430

Priority Date

20230501

Claims (20)

1. (a) Solid adsorbent and (b) Liquid carrier and (c) A hardening binder, A curable coating composition containing the following.
2. The curable binder comprises an epoxy resin, as described in claim 1, for the curable coating composition.
3. The curable coating composition according to claim 2, wherein the epoxy resin comprises an alicyclic epoxy resin.
4. The curable coating composition according to claim 2, wherein the curable binder further comprises a diamine.
5. The curable coating composition according to claim 2, wherein the curable binder further comprises an epoxy modifier selected from the group consisting of epoxy-functionalized alcohols, epoxy-functionalized diols, epoxy-functionalized polyols, and epoxy-functionalized carboxylic acids.
6. The curable coating composition according to claim 2, wherein the curable binder further comprises an epoxy-functionalized silane.
7. The curable coating composition according to claim 1, wherein the liquid carrier is a polar organic solvent.
8. The curable coating composition according to claim 7, wherein the polar organic solvent is isopropanol.
9. The curable coating composition according to claim 1, wherein the solid adsorbent is a polyamine-based lindendrimer (P-dendrimer).
10. The curable coating composition according to claim 1, wherein the polyamine-based P-dendrimer is based on a polyamine selected from the group consisting of branched polyethyleneimine (PEI) with a molecular weight (MW) of 800, branched PEI with a molecular weight (MW) of 600, branched PEI with a molecular weight of 1200, branched PEI with a molecular weight of 2500, branched PEI with a molecular weight of 10000, linear PEI with a molecular weight (MW) of 600, tetraethylenepentamine, triethylenebutamine, diethylenetriamine, 1,2-diaminoethane, 1,2-diaminopropane, and 2,2',2''-triaminotriethylamine.
11. The curable coating composition according to claim 1, wherein the solid adsorbent is a metal-organic frame (MOF).
12. The curable coating composition according to claim 11, wherein the MOF is selected from the group consisting of MOF-801, MOF-808, MOF-841, MOF-303, MOF-333, NbOFFIVE-1-Ni, FeFFIVE-1-Ni, and AlFFIVE-1-Ni.
13. The curable coating composition according to claim 1, wherein the curable coating composition comprises at least about 5 weight percent (wt%) of the curable binder compared to the weight of the solid adsorbent.
14. The curable coating composition according to claim 13, wherein the curable coating composition comprises about 5 wt% to about 45 wt% of a curable binder compared to the weight of the solid adsorbent.
15. The curable coating composition according to claim 1, further comprising a porosity control agent.
16. The curable coating composition according to claim 15, wherein the porous control agent comprises an inorganic solid additive that can be decomposed during heating at a temperature suitable for curing the curable binder solution.
17. The curable coating composition according to claim 16, wherein the porous control agent comprises one or more ammonium carbonate and ammonium bicarbonate.
18. The curable coating composition according to claim 15, wherein the porous control agent comprises a carbamate group formed between carbon dioxide gas and a reactive amine group in a polyamine-based P-dendrimer or another curable coating composition component containing the reactive amine group.
19. (a) A step of preparing a slurry containing a solid adsorbent and a liquid carrier, (b) A step of preparing a curable binder, (c) A step of preparing a curable coating composition by bringing the curable binder into contact with the slurry, A method for preparing a curable coating composition, including the following.
20. The method according to claim 19, wherein the step of preparing the slurry includes contacting the solid adsorbent with the liquid carrier and stirring the resulting mixture for a predetermined time.

Description

(Government support) This invention was made with government support granted by the U.S. Department of Energy, DE-FE0032099. The U.S. Government has certain rights with respect to this invention. (Cross-reference of related applications) This application claims priority to U.S. Provisional Patent Application No. 63/463,274, entitled "ADSORPTIVE COATINGS FOR METAL SURFACES AND RELATED METHODS," filed on 1 May 2023, the entire contents of which are incorporated herein by reference. (Technical field) The subject matter of this disclosure relates to curable and pre-cured coating compositions (e.g., for metal surfaces) and methods for coating surfaces with curable coating compositions. The coating compositions may include organic and inorganic materials, which may be selected to provide desired surface/coating properties or functionalities, such as desired porosity and the ability to capture/adsorb specific molecules. Typical coating compositions include adsorbents such as polyamine-based lindendrimers (P-dendrimers) for carbon dioxide capture, or metal-organic structures (MOFs) for water adsorption. The subject matter of this disclosure also relates to methods for using the coated surfaces of this disclosure for carbon capture or water collection from the air. The coating process generally involves depositing organic and/or inorganic materials onto a surface (such as a metal rod, sheet, paper, or other object surface). It may be desirable to coat the surface of another object with different materials in a uniform manner, e.g., with a uniform pattern and/or thickness. Surface coating may be desirable for various reasons, including providing corrosion protection and/or a good appearance. The selection of a particular coating material may depend on various parameters, such as the shape of the surface to be coated, desired friction properties, hydrophilicity, thermal and/or electrical properties, and the cost and availability of the coating material. The coating material may be colored or uncolored and may be used to form a film of a desired thickness. Generally, it may be desirable for the coated surface to have good durability, for example, by minimizing loss of functionality and/or dimensionality. In recent years, coating materials and processes have attracted attention for their use in the preparation of adsorbent coatings, such as carbon capture technology, water collection, and various other chemical separation/purification applications. For example, to provide carbon capture, it may be desirable to deposit or coat a carbon dioxide-adsorbent material onto a metal plate arranged in a designed structure to selectively adsorb carbon dioxide from gaseous mixtures such as mixed gas streams, exhaust gases, or the atmosphere. Materials capable of adsorbing water can be used for atmospheric water collection, i.e., adsorbing water vapor from the air and subsequently releasing or recovering it as liquid water; this application is of particular interest in arid regions. Therefore, there is a continuing need for further coating formulations and processes for coating surfaces with materials capable of selectively capturing or adsorbing specific molecules, particularly carbon dioxide or water. This summary lists several embodiments of the subject matter of this disclosure and, in many cases, lists examples of variations and combinations of these embodiments. This summary is merely an example of the many diverse embodiments. References to representative features of a given embodiment are also illustrative. Such embodiments may or may not exist with or without the referenced features, and similarly, these features may apply to other embodiments of this disclosure, whether or not they are described in this summary. To avoid excessive repetition, this summary does not list or suggest all possible combinations of such features. In some embodiments, the subject of this disclosure provides a curable coating composition comprising (a) a solid adsorbent, (b) a liquid carrier, and (c) a curable binder. In some embodiments, the curable binder comprises an epoxy resin. In some embodiments, the epoxy resin comprises an alicyclic epoxy resin. In some embodiments, the curable binder further comprises a diamine. In some embodiments, the curable binder further comprises an epoxy modifier selected from the group comprising epoxy-functionalized alcohols, epoxy-functionalized diols, epoxy-functionalized polyols, and epoxy-functionalized carboxylic acids. In some embodiments, the curable binder further comprises an epoxy-functionalized silane. In some embodiments, the liquid carrier is a polar organic solvent. In some embodiments, the polar organic solvent is isopropanol. In some embodiments, the solid adsorbent is a polyamine-based lindendrimer (P-dendrimer). In some embodiments, the polyamine-based P-dendrimer is based on a polyamine selected from the group including branched polyethyleneimine (PEI) with a molecular weight (MW) of 800, branc