COATING AGENT, PROCESS OF FORMING COATING FILMS, PRIMER TREATMENT PROCESS, PROCESS OF REPAIRING CONCRETES, AND PROCESS OF CONSTRUCTING ROADS

• US 20200131398A1
• Filed: 08/21/2018
• Published: 04/30/2020
• Est. Priority Date: 08/22/2017
• Status: Active Grant

• Current Assignee: National Institute for Materials Science
• Original Assignee: National Institute for Materials Science
• Inventors: NAITO, Masanobu
• Granted Patent: US 11,549,033 B2
• Time in Patent Office: Days
• CPC Class Codes: C04B 41/45 Coating or impregnating paints C09D, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements ion-implantation C04B41/0027
• CPC Class Codes: C08G 73/0206 Polyalkylene(poly)amines
• CPC Class Codes: C08K 5/0025 Crosslinking or vulcanising agents; including accelerators
• CPC Class Codes: C08K 5/138 Phenolates
• CPC Class Codes: C08K 5/17 Amines; Quaternary ammonium compounds
• CPC Class Codes: C08K 5/42 Sulfonic acids; Derivatives thereof
• CPC Class Codes: C08L 71/00 Compositions of polyethers obtained by reactions forming an ether link in the main chain of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06; Compositions of derivatives of such polymers
• CPC Class Codes: C09D 171/12 Polyphenylene oxides
• CPC Class Codes: C09D 179/02 Polyamines
• CPC Class Codes: C09D 5/002 Priming paints C09D5/08 takes precedence
• CPC Class Codes: C09D 5/34 Filling pastes materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12
• CPC Class Codes: C09D 7/63 organic
• CPC Class Codes: E01C 7/147 Repairing concrete pavings, e.g. joining cracked road sections by dowels, applying a new concrete covering applying thin surface layers with other binder E01C7/35; repairing pavings in general E01C11/005; roughening by means of tools E01C11/24
• CPC Class Codes: E01C 7/325 Joining different layers, e.g. by adhesive layers; Intermediate layers, e.g. for the escape of water vapour, for spreading stresses sliding layers E01C7/34

Abstract

A coating agent is capable of forming a coating film that has enhanced adhesion and adherence to a substrate, and enhanced water resistance as well and composed mainly of an aqueous material. A process of forming a coating agent uses the coating agent, a primer treatment process uses the coating agent, a process of doing repairs to concretes uses the coating agent, and a process of laying down roads uses the coating agent. The coating agent is composed mainly of a polyphenol derivative and containing a polymerizing agent, and has a pH of 9 or less. The polymerizing agent contains a compound having two or more functional groups selected from the group of an amino group and a mercapto group per molecule. In the process of forming a coating film, the coating agent is applied onto a substrate in an alkaline environment having a pH of greater than 9.

Claims

1. A coating agent comprising a main component containing a polyphenol derivative and a polymerizing agent, wherein:

the coating agent has a pH of no greater than 9, and

the polymerizing agent contains a compound having two or more functional groups selected from the group consisting of an amino group and a mercapto group per molecule.

2. The coating agent according to claim 1, wherein the polyphenol derivative is a compound having two or more hydroxyl groups positioned adjacent to one another and bonded together in at least one aromatic ring.

3. The coating agent according to claim 1, wherein the polyphenol derivative is at least one compound selected from the group consisting of catechol and a catechol derivative.

4. The coating agent according to claim 3, wherein the catechol derivative is at least one compound selected from the group consisting of dopamine, dihydroxybenzoic acid and dihydroxyphenylalanine.

8. The coating agent according to claim 1, wherein the compound having two or more functional groups selected from the group consisting of an amino group and a mercapto group per molecule is at least one compound selected from the group consisting of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexamethylenediamine, N-(2-aminoethyl)-1,3-propanediamine, N,N′

-1,2-ethanediylbis-1,3-propanediamine, dipropylene-triamine, m-xylylenediamine, p-xylylenediamine, 1,3-bisaminocyclohexylamine, isophoronediamine, 4,4′

-methylenebiscyclohexaneamine, 4,4′

-methylenebis-(2-methyl-cyclohexaneamine), m-phenylenediamine, diaminodiphenylmethane, diaminodiphenylsulfone, N-aminoethylpiperazine, 3,9-bis(3-aminopropyl)-2,4,8,10-tetraoxaspiro(5,5)undecane, 4,7-dioxadecane-1,10-diamine, 1-propanamine, 3,3′

-(oxybis(2,1-ethanediyloxy))bis (diaminopropylated diethylene glycol), poly(oxy(methyl-1,2-ethanediyl)□

-(2-aminomethylethyl)□

-(2-aminomethylethoxy), triethylene glycol diamine, poly(oxy(methyl-1,2-ethanediyl))□

,□

′

-(oxydi-2,1-ethanediyl)bis(□

-aminomethylethoxy)), bis(3-aminopropyl)polytetrahydrofuran, bis(3-aminopropyl) polytetrahydrofuran 750, poly(oxy(methyl-1,2-ethanediyl))□

-hydro-□

-(2-aminomethylethoxy) ether, diaminopropyldipropylene glycol having 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, 1,2-ethanedithiol, 1,3-propanedithiol, 1,4-butanedithiol, 1,6-hexanedithiol, 2,2′

-thiodiethanethiol, 3,6-dioxa-1,8-octanedithiol, 1,2-benzenedithiol, 1,4-benzenedithiol, toluene-3,4-dithiol, 3-mercaptobutylate and 2-aminoethanedithiol.

9. The coating agent according to claim 1, wherein the molar ratio of the compound having two or more functional groups selected from the group consisting of an amino group and a mercapto group with respect to the polyphenol derivative is no less than 0.1 to no greater than 10.

10. The coating agent according to claim 3, wherein the molar ratio of the compound having two or more functional groups selected from the group consisting of an amino group and a mercapto group with respect to the catechol or catechol derivative is no less than 0.1 to no greater than 10.

12. The coating agent according to claim 1, which contains a pH regulator.

15. A process of forming a coating film, wherein the coating agent according to claim 1 is applied onto a substrate in an alkaline environment having a pH of greater than 9 to form a coating film thereon.

16. A process of forming a coating film, wherein the coating agent according to claim 1 is brought into contact with an alkaline substrate having a pH of greater than 9 to form a coating film on at least a portion of a surface layer of the substrate.

17. The process according to claim 16, wherein the alkaline substrate is a concrete or mortar.

18. A process of forming a coating film, comprising a step of alkalifying a substrate to place the surface of the substrate in a state having a pH of greater than 9, and a step of bringing the coating agent according to claim 1 in contact with the surface of the substrate to form a coating film.

19. A process of forming a coating film, comprising a step of applying the coating agent according to claim 1 onto a substrate, and a step of treating the coating agent applied onto the substrate with an alkaline liquid to form a coating film.

20. The process of forming a coating film according to claim 16, wherein the substrate is wetted with water.

21. The process of forming a coating film according to claim 15, which further comprises a step of, after formation of the coating film, bringing a solution containing at least one of an alkylamine, thiol fluoride or fluorine carbide into contact with the coating film.

23. A process of repairing a concrete by filling the coating agent according to claim 1 in a crack portion in the concrete to form a polymerized film in the crack portion.

24. A process of laying down a road by successively carrying out a step of forming a water-repellent layer on a substrate and a step of forming an asphalt on the water-repellent layer, wherein the water-repellent layer in the step of forming a water-repellent layer contains at least one of a polyurethane resin, an acrylic resin, an epoxy resin, a synthetic rubber, and a polyester-based unwoven fabric, and a step of applying the coating agent according to claim 1 onto the substrate in an alkaline environment is provided prior to the step of forming a water-repellent layer.

25. The process of laying down a road according to claim 24, wherein after the step of applying the coating agent onto the substrate and before the step of forming a water-repellent layer, a step of applying a solution containing at least one of an alkylamine, thiol fluoride or fluorine carbide is provided.

26. The process of forming a coating film according to claim 17, wherein the substrate is wetted with water.

27. The process of forming a coating film according to claim 16, which further comprises a step of, after formation of the coating film, bringing a solution containing at least one of an alkylamine, thiol fluoride or fluorine carbide into contact with the coating film.

5-7. -7. (canceled)

11. (canceled)

13-14. -14. (canceled)

22. (canceled)