CN112175498A - Self-detection water-based self-repairing anticorrosive coating and preparation method thereof - Google Patents

Self-detection water-based self-repairing anticorrosive coating and preparation method thereof Download PDF

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Publication number
CN112175498A
CN112175498A CN202011067474.XA CN202011067474A CN112175498A CN 112175498 A CN112175498 A CN 112175498A CN 202011067474 A CN202011067474 A CN 202011067474A CN 112175498 A CN112175498 A CN 112175498A
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self
repairing
capsule
agent
developing agent
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李跃平
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Qingdao Lingzhi Coating Technology Co ltd
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Qingdao Lingzhi Coating Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04Polyurethanes
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D123/00Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/10Homopolymers or copolymers of propene
    • C09D123/12Polypropene
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08Anti-corrosive paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/63Additives non-macromolecular organic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/65Additives macromolecular
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/70Additives characterised by shape, e.g. fibres, flakes or microspheres
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention relates to a self-detection water-based self-repairing anticorrosive coating, which comprises 70-90% of a water-based resin matrix and 10-30% of self-detection self-repairing capsules, and is characterized in that the self-detection self-repairing capsules comprise capsule walls and capsule cores, and the capsule cores comprise a water-based coating repairing agent and a color developing agent. The color developing agent is capable of reacting with metal ions and performing color development reaction, and is selected from one or more of hydroxyquinoline, 1, 10-phenanthroline and thymol blue. Through add the colour-developing agent as the capsule core in current selfreparing capsule, when the capsule is torn because of the crazing line that local area appears in the dope layer, can release colour-developing agent wherein, at the initial stage that the corrosion reaction in crazing line region takes place, can observe the colour change through the naked eye, play self-checking and early warning effect, make the crazing line region discover and fix a position easily simultaneously, point out the position for the restoration of dope layer.

Description

Self-detection water-based self-repairing anticorrosive coating and preparation method thereof
Technical Field
The invention relates to the field of water-based self-repairing anticorrosive coatings, in particular to a self-detecting water-based self-repairing anticorrosive coating and a preparation method thereof.
Background
In order to avoid or slow down the corrosion and damage of oxygen and moisture in the environment to the metal material, the common method is to apply water-based anticorrosive paint on the surface of the metal material. However, the anticorrosive coating cannot absolutely guarantee the corrosion resistance of the metal material, and the anticorrosive coating is also damaged by impact, scratch and the like of the external environment in the using process, so that microcracks or openings are formed in the coating layer, and the local area of the coating layer loses the protection effect on the metal material.
In order to solve the problem of influence on the protection of metal materials caused by the damage of a coating layer, self-repairing water-based coatings are researched, self-repairing capsules or self-repairing fibers are added into the water-based coatings, when the coating layer is damaged, local stress concentration can be generated in the damaged area, the self-repairing capsules or self-repairing fibers are torn, a repairing agent in the self-repairing capsules or self-repairing fibers is released, and therefore the coating layer is repaired.
The common self-repairing capsules or self-repairing fibers are mostly disposable, the repairing function of the capsules or the self-repairing fibers is irreversible, and multiple repairing or circulating repairing can not be realized. In addition, a repairing agent capable of performing repeated repair for many times has been studied. However, in the process of repeatedly repairing the coating layer by the self-repairing capsule or the self-repairing fiber for many times, the judgment of the area or the part to be repaired is difficult. On one hand, fine cracks in the coating layer are difficult to be found, and when the fine cracks are found, the metal materials usually have relatively serious corrosion; on the other hand, larger openings or cracks in the paint layer are easily found, but the corrosion of these areas is also very fast. It is therefore desirable to repair the paint layer immediately when it has just developed microcracks.
Therefore, the inventor of the invention develops a self-detection water-based self-repairing anticorrosive coating and a preparation method thereof.
Disclosure of Invention
Aiming at the technical problem that microcracks in the existing self-repairing coating are not easy to discover, the invention provides a self-detection water-based self-repairing anticorrosive coating and a preparation method thereof. The self-detection water self-repairing anticorrosive coating comprises 70-90% of a water-based resin matrix and 10-30% of self-detection self-repairing capsules. When the local area in the coating layer has microcracks, the capsule wall of the self-detection self-repairing capsule is torn by local concentrated stress, the repairing agent and the color developing agent in the capsule wall are released, and when the metal material is corroded at first, the generated metal ions can show easily observed color or color change when meeting the color developing agent, so that the microcrack area is easily found and positioned, and the position is indicated for repairing the coating layer.
The self-detection water-based self-repairing anticorrosive coating comprises 70-90% of a water-based resin matrix and 10-30% of self-detection self-repairing capsules, and is characterized in that the self-detection self-repairing capsules comprise capsule walls and capsule cores, and the capsule cores comprise a water-based coating repairing agent and a color developing agent. Wherein the aqueous resin matrix is selected from one or more of aqueous polyurethane resin, aqueous epoxy resin and aqueous propylene resin.
Further, in the self-detecting and self-repairing capsules used in the present invention, the color-developing agent is a color-developing agent capable of reacting with a metal ion and developing a color reaction, for example,
the color developing agent can be one or more of hydroxyquinoline, 1,10 phenanthroline and thymol blue. In order to facilitate the preparation of the self-detection and self-repair capsule, the color developing agent is loaded on the surface of the nano-carrier, the nano-carrier selected by the invention is graphene, and other suitable nano-carriers can be selected.
In the self-detection and self-repair capsule used in the invention, the water-based paint repair agent used in the capsule core can be a single repair agent with a single repair function or a multiple repair agent with multiple repair functions and capable of realizing repeated repair of the paint layer, and preferably is a multiple repair agent with multiple repair functions and capable of realizing repeated repair of the paint layer.
Wherein, the single-time repairing agent can be selected from liquid epoxy resin or polyhydroxy or polyamino compound which respectively reacts with isocyanate to generate isocyanate derivative and the like.
Wherein, the multiple repairing agent can be selected from diamine addition crosslinking agent in CN 104045810A.
Further, the capsule core may also include a catalyst to accelerate the repair of the coating layer.
In the self-detection and self-repair capsule, the basic function is to repair the coating layer, and the color developing agent is used for finding the area to be repaired and positioning the repair area. Therefore, in the capsule core, the mass percent of the color developing agent is 1-10%, and the mass percent of the water-based paint repairing agent is 90-99%.
Further, the capsule wall used in the invention is polyurethane, specifically, polyhydroxy or polyamino compounds are respectively reacted with isocyanate to generate isocyanate derivatives, and then the isocyanate derivatives are reacted with polyol to generate polyurethane to coat the capsule core.
The preparation method of the self-detection and self-repair capsule comprises the following steps:
(1) and (3) loading a color developing agent, preparing graphene aqueous dispersion with a certain concentration, adding the color developing agent into the graphene aqueous dispersion in a certain proportion, ultrasonically dispersing, filtering and airing to obtain the color developing agent taking graphene as a carrier.
(2) And (2) uniformly dispersing and mixing the graphene prepared in the step (1) as a color developing agent of a carrier and a water-based paint repairing agent in a solvent to form a core material, forming polyurethane on the surface of the core material, specifically, reacting polyhydroxy or polyamino compounds with isocyanate respectively to generate isocyanate derivatives, and then reacting with polyol to generate polyurethane to obtain the self-detection and self-repair capsule.
The mass ratio of the color developing agent to the graphene is (1-2): (2-1).
Compared with the existing water-based self-repairing anticorrosive coating, the self-detecting water-based self-repairing anticorrosive coating has the following beneficial effects:
(1) according to the invention, the existing self-repairing capsule is improved, and the color developing agent is added as the capsule core to obtain the self-detecting and self-repairing capsule, so that when the self-detecting and self-repairing capsule is torn due to the microcracks appearing in the local area of the coating layer, the repairing agent and the color developing agent in the self-detecting and self-repairing capsule are released, the color change can be observed through naked eyes at the initial stage of the corrosion reaction of the microcrack area, the self-detecting and early-warning effects are achieved, meanwhile, the microcrack area is easy to find and position, and the position is indicated for repairing the coating layer.
(2) In the self-detection and self-repair capsule, the used water-based paint repair agent can be a single repair agent or a multiple repair agent. Particularly, for a multi-time repairing agent, the multi-time repairing can be realized only by additionally heating, so that the self-detection capsule disclosed by the invention has a particularly remarkable effect, and can help repairing workers to accurately judge an area to be repaired and heat the area.
Detailed Description
The following examples are only some embodiments for describing the contents of the present invention in detail, and are not all contents of the present invention.
Example 1
The self-detection water-based self-repairing anticorrosive coating comprises 80% of a water-based resin matrix and 20% of self-detection self-repairing capsules, and is characterized in that the self-detection self-repairing capsules comprise capsule walls and capsule cores, and the capsule cores comprise a water-based coating repairing agent and a color developing agent. Wherein the aqueous resin matrix is selected from aqueous polyurethane resin. The color developing agent is hydroxyquinoline and is loaded on the surface of the graphene. In the capsule core, the mass percent of the color developing agent is 5 percent, and the mass percent of the water-based paint repairing agent is 95 percent.
The water-based paint repairing agent has a repeated repairing function and can realize repeated repairing of a paint layer, and is a diamine adduct crosslinking agent selected from CN 104045810A.
The preparation method of the self-detection and self-repair capsule comprises the following steps:
(1) loading a color developing agent, preparing graphene aqueous dispersion with a certain concentration, adding the color developing agent into the graphene aqueous dispersion in a certain proportion, ultrasonically dispersing, filtering and airing to obtain the color developing agent taking graphene as a carrier; the mass ratio of the color developing agent to the graphene is 1: 1.
(2) and (2) dispersing and uniformly mixing the graphene prepared in the step (1) as a color developing agent of a carrier and a diamine adduct crosslinking agent in CN 104045810A in a solvent to form a core material, forming polyurethane on the surface of the core material, specifically, reacting polyhydroxy or polyamino compounds with isocyanate respectively to generate isocyanate derivatives, and then reacting with polyol to generate polyurethane to obtain the self-detection and self-repair capsule.
Example 2
The self-detection water-based self-repairing anticorrosive coating comprises 70% of a water-based resin matrix and 30% of self-detection self-repairing capsules, and is characterized in that the self-detection self-repairing capsules comprise capsule walls and capsule cores, and the capsule cores comprise a water-based coating repairing agent and a color developing agent. Wherein the aqueous resin matrix is selected from aqueous propylene resin. The color developing agent is hydroxyquinoline and is loaded on the surface of the graphene. In the capsule core, the mass percent of the color developing agent is 2 percent, and the mass percent of the water-based paint repairing agent is 98 percent.
The water paint repairing agent is a single repairing agent with a single repairing function, and is isocyanate derivatives generated by the reaction of polyhydroxy or polyamino compounds and isocyanate respectively.
The preparation method of the self-detection and self-repair capsule comprises the following steps:
(1) loading a color developing agent, preparing graphene aqueous dispersion with a certain concentration, adding the color developing agent into the graphene aqueous dispersion in a certain proportion, ultrasonically dispersing, filtering and airing to obtain the color developing agent taking graphene as a carrier; the mass ratio of the color developing agent to the graphene is 1: 2.
(2) and (2) taking the graphene prepared in the step (1) as a color developing agent of a carrier, reacting the color developing agent with a polyhydroxy or polyamino compound with isocyanate respectively to generate an isocyanate derivative, dispersing and mixing the isocyanate derivative in a solvent to form a core material, forming polyurethane on the surface of the core material, specifically, reacting the polyhydroxy or polyamino compound with the isocyanate respectively to generate the isocyanate derivative, and then reacting the isocyanate derivative with polyol to generate the polyurethane to obtain the self-detection and self-repair capsule.
Example 3
The self-detection water-based self-repairing anticorrosive coating comprises 90% of a water-based resin matrix and 10% of self-detection self-repairing capsules, and is characterized in that the self-detection self-repairing capsules comprise capsule walls and capsule cores, and the capsule cores comprise a water-based coating repairing agent and a color developing agent. Wherein the aqueous resin matrix is selected from aqueous epoxy resins. The color developing agent is hydroxyquinoline and is loaded on the surface of the graphene. In the capsule core, the mass percent of the color developing agent is 10 percent, and the mass percent of the water-based paint repairing agent is 90 percent.
The water-based paint repairing agent is a single repairing agent with a single repairing function and is liquid epoxy resin.
The preparation method of the self-detection and self-repair capsule comprises the following steps:
(1) loading a color developing agent, preparing graphene aqueous dispersion with a certain concentration, adding the color developing agent into the graphene aqueous dispersion in a certain proportion, ultrasonically dispersing, filtering and airing to obtain the color developing agent taking graphene as a carrier; the mass ratio of the color developing agent to the graphene is 2: 1.
(2) dispersing and uniformly mixing the graphene prepared in the step (1) as a color developing agent of a carrier and liquid epoxy resin in a solvent to form a core material, forming polyurethane on the surface of the core material, specifically, reacting polyhydroxy or polyamino compounds with isocyanate respectively to generate isocyanate derivatives, and then reacting with polyol to generate polyurethane to obtain the self-detection and self-repair capsule.

Claims (9)

1. A self-detection water-based self-repairing anticorrosive coating comprises 70-90% of a water-based resin matrix and 10-30% of self-detection self-repairing capsules, and is characterized in that the self-detection self-repairing capsules comprise capsule walls and capsule cores, and the capsule cores comprise a water-based coating repairing agent and a color developing agent.
2. The self-testing aqueous self-repairing anticorrosive coating of claim 1, wherein: the color developing agent is capable of reacting with metal ions and performing color development reaction, and is selected from one or more of hydroxyquinoline, 1, 10-phenanthroline and thymol blue; the color developing agent is loaded on the surface of the nano-carrier, and the nano-carrier is graphene.
3. The self-testing aqueous self-repairing anticorrosive coating of claim 1, wherein: the aqueous resin matrix is selected from one or more of aqueous polyurethane resin, aqueous epoxy resin and aqueous propylene resin.
4. The self-testing aqueous self-repairing anticorrosive coating of claim 1, wherein: the water-based paint repairing agent used in the capsule core is a single repairing agent with a single repairing function or a multi-time repairing agent with a multi-time repairing function and capable of realizing repeated repairing of a paint layer.
5. The self-testing aqueous self-repairing anticorrosive coating of claim 4, wherein: the single repairing agent can be selected from liquid epoxy resin, polyhydroxy or polyamino compounds which respectively react with isocyanate to generate isocyanate derivatives and hydroxymethyl cellulose, and the multiple repairing agent is a diamine addition product cross-linking agent.
6. The self-testing aqueous self-repairing anticorrosive coating of claim 1, wherein: the capsule core may also include a catalyst.
7. The self-testing aqueous self-repairing anticorrosive coating of claim 1, wherein: in the capsule core, the mass percent of the color developing agent is 1-10%, and the mass percent of the water-based paint repairing agent is 90-99%.
8. The self-testing aqueous self-repairing anticorrosive coating of claim 1, wherein: the capsule wall is polyurethane, and specifically, polyhydroxy or polyamino compounds react with isocyanate respectively to generate isocyanate derivatives, then the isocyanate derivatives react with polyol to generate polyurethane, and the polyurethane is coated outside the capsule core.
9. The self-testing aqueous self-repairing anticorrosive coating of any one of claims 1 to 8, characterized in that: the preparation method of the self-detection and self-repair capsule comprises the following steps:
(1) loading a color developing agent, preparing graphene aqueous dispersion with a certain concentration, adding the color developing agent into the graphene aqueous dispersion in a certain proportion, ultrasonically dispersing, filtering and airing to obtain the color developing agent taking graphene as a carrier;
(2) dispersing and mixing the graphene prepared in the step (1) as a color developing agent of a carrier and a water-based paint repairing agent uniformly in a solvent to form a core material, and then forming polyurethane on the surface of the core material, specifically, reacting polyhydroxy or polyamino compounds with isocyanate respectively to generate isocyanate derivatives, and then reacting with polyol to generate polyurethane to obtain a self-detection capsule;
the mass ratio of the color developing agent to the graphene is (1-2): (2-1).
CN202011067474.XA 2020-10-06 2020-10-06 Self-detection water-based self-repairing anticorrosive coating and preparation method thereof Pending CN112175498A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112992404A (en) * 2021-05-06 2021-06-18 西安宏星电子浆料科技股份有限公司 High-conductivity conductive slurry

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104045810A (en) * 2014-06-18 2014-09-17 中国科学院化学研究所 Diamine addition crosslinking agent and preparation method thereof, as well as composition for preparing thermal reversible crosslinking epoxy resin and composite material of thermal reversible crosslinking epoxy resin
CN106189771A (en) * 2016-07-19 2016-12-07 上海理工大学 A kind of Autonomous test anticorrosive paint containing nano-carrier and its preparation method and application
US20170158883A1 (en) * 2015-12-04 2017-06-08 The Board Of Trustees Of The University Of Illinois Autonomic damage indication in coatings

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104045810A (en) * 2014-06-18 2014-09-17 中国科学院化学研究所 Diamine addition crosslinking agent and preparation method thereof, as well as composition for preparing thermal reversible crosslinking epoxy resin and composite material of thermal reversible crosslinking epoxy resin
US20170158883A1 (en) * 2015-12-04 2017-06-08 The Board Of Trustees Of The University Of Illinois Autonomic damage indication in coatings
CN106189771A (en) * 2016-07-19 2016-12-07 上海理工大学 A kind of Autonomous test anticorrosive paint containing nano-carrier and its preparation method and application
CN108485495A (en) * 2016-07-19 2018-09-04 上海理工大学 A method of preparing the self-test anticorrosive paint containing nano-carrier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112992404A (en) * 2021-05-06 2021-06-18 西安宏星电子浆料科技股份有限公司 High-conductivity conductive slurry

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