Coating agent, process of forming coating films, primer treatment process, process of repairing concretes, and process of constructing roads

• US 11,549,033 B2
• Filed: 08/21/2018
• Issued: 01/10/2023
• 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
• Primary Examiner(s): Leong, Nathan T
• Application Number:
  US16/624,655
• Publication Number:
  US 20200131398A1
• Time in Patent Office: 1,603 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 process of laying down a road by successively carrying out the steps, comprising:

a step of preparing a coating agent comprising a main component containing a polyphenol derivative and a polymerizing agent,

a step of applying the coating agent onto a substrate in an alkaline environment to form a coating film thereon,

a step of forming a water-repellent layer on the coating film, and

a step of forming an asphalt on the water-repellent layer, wherein the water-repellent layer in the step of forming the 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,

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 process of laying down a road according to claim 1, 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.

3. A process of forming a coating film, comprising:

a step of preparing a coating agent comprising a main component containing a polyphenol derivative and a polymerizing agent,

(i) a step of applying the coating agent onto a substrate in an alkaline environment having a pH of greater than 9 to form a coating film thereon, or

(ii) a step of contacting the coating agent 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, and

a step of, after formation of the coating film in (i) or (ii), bringing a solution containing at least one of an alkylamine, thiol fluoride or fluorine carbide into contact with the coating film,

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.

4. A process of forming a coating film, comprising:

a step of preparing a coating agent comprising a main component containing a polyphenol derivative, a polymerizing agent and a buffer solution, and

(i) a step of applying the coating agent onto a substrate in an alkaline environment having a pH of greater than 9 to form a coating film thereon, or

(ii) a step of contacting the coating agent 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 a substrate,

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.