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CN113150647A - Antibacterial coating for touch screen - Google Patents

  • ️Fri Jul 23 2021

CN113150647A - Antibacterial coating for touch screen - Google Patents

Antibacterial coating for touch screen Download PDF

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Publication number
CN113150647A
CN113150647A CN202110370922.1A CN202110370922A CN113150647A CN 113150647 A CN113150647 A CN 113150647A CN 202110370922 A CN202110370922 A CN 202110370922A CN 113150647 A CN113150647 A CN 113150647A Authority
CN
China
Prior art keywords
parts
agent
coating
touch screen
antibacterial
Prior art date
2021-04-07
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Pending
Application number
CN202110370922.1A
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Chinese (zh)
Inventor
王景泉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Branch Of Chuzhou Jinqiao Deke New Material Co Ltd
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Wuxi Branch Of Chuzhou Jinqiao Deke New Material Co Ltd
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2021-04-07
Filing date
2021-04-07
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2021-07-23
2021-04-07 Application filed by Wuxi Branch Of Chuzhou Jinqiao Deke New Material Co Ltd filed Critical Wuxi Branch Of Chuzhou Jinqiao Deke New Material Co Ltd
2021-04-07 Priority to CN202110370922.1A priority Critical patent/CN113150647A/en
2021-07-23 Publication of CN113150647A publication Critical patent/CN113150647A/en
Status Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/002—Priming paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2203/00—Other substrates
    • B05D2203/30—Other inorganic substrates, e.g. ceramics, silicon
    • B05D2203/35—Glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2503/00—Polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2504/00—Epoxy polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2508/00—Polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0806—Silver
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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

Abstract

The invention discloses an antibacterial coating for a touch screen, which comprises a bottom optical coating and a surface hardening antibacterial coating, wherein the bottom optical coating comprises the following components in parts by weight: 2-9 parts of polyethylene terephthalate, 15-25 parts of polyurethane resin, 0.1-2 parts of a defoaming agent, 0.1-2 parts of a flatting agent, 0-20 parts of a curing agent and 10-40 parts of a solvent; the surface hardening antibacterial coating comprises the following components in parts by weight: 2-9 parts of polyethylene terephthalate, 5-9 parts of polyurethane resin, 10-15 parts of epoxy resin, 0-40 parts of metal nanoparticles, 0.1-2 parts of silane coupling agent, 0.1-2 parts of defoaming agent, 0.1-2 parts of flatting agent, 0.1-2 parts of dispersing agent, 0-10 parts of curing agent and 0-20 parts of solvent. The touch screen antibacterial coating adopts the double-layer coating to replace the traditional single-layer coating, the adhesion between the bottom layer optical coating and the surface hardening antibacterial coating is good, the secondary curing mode is adopted, the antibacterial particles are concentrated on the surface coating, the antibacterial particles are prevented from sinking, the cost is saved, the antibacterial effect is improved, meanwhile, the touch screen antibacterial coating has good adhesion, wear resistance and optical performance, the appearance is smooth and tidy, and the touch screen antibacterial coating is particularly suitable for the surface of a touch screen.

Description

Antibacterial coating for touch screen

Technical Field

The invention belongs to the technical field of coatings, and particularly relates to an antibacterial coating for a touch screen.

Background

In general, with the development of society, people's awareness of health and environmental protection is continuously increasing. For example, in the field of surface coatings, coatings that are only aesthetically pleasing and that have a protective effect on the product are becoming increasingly unsatisfactory. It is also expected to produce health effects such as antimicrobial coatings. The antibacterial nano particles have unique physical and chemical properties due to their small size effect and surface effect, and if the antibacterial nano particles are added to the coating, the obtained coating has antibacterial effect. Conventional antibacterial coatings include two types, one is a photocatalytic antibacterial coating having nano titanium dioxide or nano zinc oxide as antibacterial nanoparticles. The photocatalytic nano antibacterial coating has good antibacterial performance in the presence of ultraviolet rays, oxygen and water; the other is an antibacterial coating with nano silver as antibacterial nano particles. The antibacterial action of the nano silver is less influenced by external factors, so the nano silver has wide application range.

The principle of sterilization of the nano antibacterial particles in the antibacterial coating after the coating process is mainly that the nano antibacterial particles are broken by contact with the cell membrane of bacteria in the air, the tissue fluid of the bacteria flows out, and the proteins are coagulated to inactivate the bacteria. Eventually, the bacteria are killed due to the inhibition of DNA synthesis and the loss of division and reproductive ability, thereby achieving an antibacterial effect.

However, whether nano titanium dioxide or nano zinc oxide is used as the antibacterial nano particles or nano silver is used as the antibacterial nano particles, most of the antibacterial nano particles are deeply dispersed in the recoating layer. Only a few antibacterial nano particles in the antibacterial coating are exposed from the surface of the coating layer, and as the antibacterial nano particles are added into the antibacterial coating and stirred, the antibacterial nano particles are positioned in the deep part in the antibacterial coating and can not play a role in sterilizing bacteria, thereby causing waste. The antibacterial nano particles exposed from the surface of the coating layer are only rare, so that the antibacterial effect of the conventional antibacterial coating layer is limited.

Therefore, there is a need for an antibacterial coating that can overcome the above problems.

Disclosure of Invention

The invention aims to provide an antibacterial coating for a touch screen on the basis of the prior art.

The object of the invention can be achieved by the following measures:

the touch screen antibacterial coating comprises a bottom optical coating and a surface hardening antibacterial coating, wherein the thickness of the bottom optical coating is 20-50 mu m, and the thickness of the surface hardening antibacterial coating is 5-15 mu m.

In a preferred embodiment, the bottom optical coating comprises the following components in parts by weight: 2-9 parts of polyethylene terephthalate, 15-25 parts of polyurethane resin, 0.1-2 parts of a defoaming agent, 0.1-2 parts of a flatting agent, 0-20 parts of a curing agent and 10-40 parts of a solvent; the surface hardening antibacterial coating comprises the following components in parts by weight: 2-9 parts of polyethylene terephthalate, 5-9 parts of polyurethane resin, 10-15 parts of epoxy resin, 0-40 parts of metal nanoparticles, 0.1-2 parts of silane coupling agent, 0.1-2 parts of defoaming agent, 0.1-2 parts of flatting agent, 0.1-2 parts of dispersing agent, 0-10 parts of curing agent and 0-20 parts of solvent.

In a more preferred embodiment, the base optical coating comprises the following components in parts by weight: 5.5 parts of polyethylene glycol terephthalate, 20 parts of polyurethane resin, 1 part of defoaming agent, 1 part of flatting agent, 10 parts of curing agent and 25 parts of solvent; the surface hardening antibacterial coating comprises the following components in parts by weight: 5.5 parts of polyethylene terephthalate, 7 parts of polyurethane resin, 12.5 parts of epoxy resin, 20 parts of metal nano particles, 1 part of silane coupling agent, 1 part of defoaming agent, 1 part of flatting agent, 5 parts of curing agent and 10 parts of solvent.

Preferably, the metal nanoparticles are one or more of nano titanium dioxide, nano silver powder, ceramic powder and chitosan.

Preferably, the defoaming agent is Shanghai millilin chemical defoaming AQUALEN HS01 or defoaming AMOKSO 7201 Shanghai research chemical; the leveling agent is a Shanghai millilin chemical leveling agent KL-401 or a Shanghai millilin chemical leveling agent KL-700; the dispersant is an aliphatic dispersant, preferably a nonionic polyoxyethylene fatty amine.

Preferably, the curing agent is one of Colesichu L75 isocyanic acid, Wuhan chemical Quanxing S-208 isocyanic acid, Colesichu L1470 isocyanic acid, Colesichu IL 1451 isocyanic acid and Korea Aijing AK-75 isocyanic acid;

preferably, the solvent is any three combinations of Beijing Taike Ruidi International trade BCS, Wuhan Beiguogongfeng PMA, Shandong Xu Chen chemical engineering technology ethyl ester, Shandong Xu Chen chemical engineering technology butyl ester, Beijing Taike Ruidi International trade DBE, Shanghai Min Shimi chemical engineering isophorone, Suzhou Hengshuo chemical acetophenone, Wuhan Beiguogong butanone.

The invention also provides a preparation method of the touch screen antibacterial coating, which comprises the following steps: the preparation method of the bottom layer optical coating comprises the steps of stirring and mixing polyethylene glycol terephthalate and polyurethane resin at the temperature of 20-80 ℃ for reaction, adding a defoaming agent, a leveling agent, a curing agent and a solvent, dispersing for 10-20 min at the speed of 800-1000 r/min by using a high-speed dispersion machine, grinding to the fineness of less than 3 mu m after stirring, and uniformly stirring; the preparation method of the surface hardening antibacterial coating comprises the steps of stirring and mixing polyethylene glycol terephthalate, polyurethane resin and epoxy resin for reaction at the temperature of 20-80 ℃, adding metal nanoparticles, a silane coupling agent, a defoaming agent, a leveling agent, a dispersing agent, a curing agent and a solvent, dispersing for 10-20 min at the speed of 800-1000 r/min by using a high-speed dispersion machine, grinding to the fineness of less than 3 mu m after stirring, and stirring uniformly.

The invention also provides a method for applying each coating, which comprises the following steps: firstly, spraying a bottom optical coating on a touch screen glass substrate, and baking and drying the substrate at 90-120 ℃ for 20-30min, wherein the curing rate of the coating is 70%; and then spraying a surface hardening antibacterial coating on the surface of the bottom optical coating, and baking and drying at the temperature of 140-160 ℃ for 30-45min until the coating is completely dried.

According to the invention, a double-layer coating process of a bottom optical coating and a surface hardening antibacterial coating is adopted, polyethylene terephthalate and polyurethane resin are added, the optical effect and the adhesive force of the coating are improved, and the physical property of the coating is improved by adding epoxy resin into the surface hardening antibacterial coating; according to the invention, only the metal nanoparticles are added into the surface hardening antibacterial coating and matched with the aliphatic dispersant, so that the effects of preventing the metal nanoparticles from settling and dispersing are achieved, the material cost is saved, and the antibacterial effect of the contact surface of the touch screen is ensured.

Has the advantages that:

the touch screen antibacterial coating provided by the invention has the advantages that the synergistic effect of the multi-component mixed resin is exerted, the adhesive force of the bottom layer optical coating and the surface hardening antibacterial coating is good, the secondary curing mode is adopted, the antibacterial particles are concentrated on the surface coating, the antibacterial particles are prevented from sinking, the cost is saved, the antibacterial effect is improved, meanwhile, the touch screen antibacterial coating has good adhesive force, wear resistance and optical performance, the appearance is smooth and tidy, and the touch screen antibacterial coating is particularly suitable for the surface of a touch screen.

Detailed Description

The present invention will be further described with reference to the following examples. The scope of the invention is not limited to the following examples.

The preparation method of the resin composition in each example comprises the following steps:

the preparation method of the bottom layer optical coating comprises the steps of stirring and mixing polyethylene glycol terephthalate and polyurethane resin at the temperature of 20-80 ℃ for reaction, adding a defoaming agent, a leveling agent, a curing agent and a solvent, dispersing for 10-20 min at the speed of 800-1000 r/min by using a high-speed dispersion machine, grinding to the fineness of less than 3 mu m after stirring, and uniformly stirring; the preparation method of the surface hardening antibacterial coating comprises the steps of stirring and mixing polyethylene glycol terephthalate, polyurethane resin and epoxy resin for reaction at the temperature of 20-80 ℃, adding metal nanoparticles, a silane coupling agent, a defoaming agent, a leveling agent, a curing agent and a solvent, dispersing for 10-20 min at the speed of 800-1000 r/min by using a high-speed dispersion machine, grinding to the fineness of less than 3 mu m after stirring, and uniformly stirring.

Example 1

The bottom optical coating comprises the following components in parts by weight: 2 parts of polyethylene terephthalate, 15 parts of polyurethane resin, 0.1 part of defoaming agent, 0.1 part of flatting agent, 5 parts of curing agent and 10 parts of solvent;

the surface hardening antibacterial coating comprises the following components in parts by weight: 2 parts of polyethylene terephthalate, 5 parts of polyurethane resin, 10 parts of epoxy resin, 5 parts of metal nano particles, 0.1 part of silane coupling agent, 0.1 part of defoaming agent, 0.1 part of flatting agent, 0.1 part of dispersing agent, 1 part of curing agent and 5 parts of solvent.

Wherein the metal nanoparticles are nano titanium dioxide and nano silver powder; the defoaming agent is Shanghai millilin chemical defoaming AQUALEN HS 01; the leveling agent is a Shanghai millimin chemical leveling agent KL-401; the dispersing agent is nonionic polyoxyethylene fatty amine; the curing agent is Colesichu L75 isocyanic acid; the solvent is BCS of the national trade of Beijing Taike Ruidi, PMA of the Beihan Beiguofeng, and ethyl ester of Shandong Xu Chen chemical engineering.

Example 2

The bottom optical coating comprises the following components in parts by weight: 5.5 parts of polyethylene glycol terephthalate, 20 parts of polyurethane resin, 1 part of defoaming agent, 1 part of flatting agent, 10 parts of curing agent and 25 parts of solvent;

the surface hardening antibacterial coating comprises the following components in parts by weight: 5.5 parts of polyethylene terephthalate, 7 parts of polyurethane resin, 12.5 parts of epoxy resin, 20 parts of metal nano particles, 1 part of silane coupling agent, 1 part of defoaming agent, 1 part of flatting agent, 1 part of dispersing agent, 5 parts of curing agent and 10 parts of solvent.

Wherein the metal nanoparticles are ceramic powder and chitosan; the defoaming agent is Shanghai millilin chemical defoaming AQUALEN HS 01; the leveling agent is a Shanghai millimin chemical leveling agent KL-700; the dispersing agent is nonionic polyoxyethylene fatty amine; the curing agent is Wuhanhua Quanxing S-208 isocyanic acid; the solvent is Shandong Xu morning chemical engineering butyl ester, Beijing Taike Ruidi International trade DBE, Shanghai Min Shi chemical industry isophorone.

Example 3

The bottom optical coating comprises the following components in parts by weight: 9 parts of polyethylene terephthalate, 25 parts of polyurethane resin, 2 parts of a defoaming agent, 2 parts of a leveling agent, 20 parts of a curing agent and 40 parts of a solvent;

the surface hardening antibacterial coating comprises the following components in parts by weight: 9 parts of polyethylene terephthalate, 9 parts of polyurethane resin, 15 parts of epoxy resin, 40 parts of metal nanoparticles, 2 parts of a silane coupling agent, 2 parts of a defoaming agent, 2 parts of a leveling agent, 2 parts of a dispersing agent, 10 parts of a curing agent and 20 parts of a solvent.

Wherein the metal nanoparticles are nano titanium dioxide, nano silver powder and ceramic powder; the defoaming agent is Shanghai millilin chemical defoaming AQUALEN HS 01; the leveling agent is a Shanghai millimin chemical leveling agent KL-700; the dispersing agent is nonionic polyoxyethylene fatty amine; the curing agent is Colesichu L1470 isocyanic acid; the solvent is Shanghai Ming chemical isophorone, Suzhou Henghuo chemical acetophenone, Wuhan northland butanone.

Comparative example 1

The polyethylene terephthalate in the bottom coating and the surface coating of the example 1 is removed, and the polyurethane resin is increased to 28 parts;

comparative example 2

The polyurethane resin in the bottom coating and the surface coating of the example 2 is removed, and the polyethylene terephthalate is increased to 28 parts;

comparative example 3

The metal nanoparticles in the surface coating of example 3 were removed and the solvent was increased to 68 parts;

comparative example 4

The dispersant in the surface coating of example 2 was removed and the amount of polyethylene terephthalate was increased to 28 parts; firstly, spraying a bottom optical coating on a touch screen glass substrate, and baking and drying the substrate at 90-120 ℃ for 20-30min, wherein the curing rate of the coating is 70%; and then spraying a surface hardening antibacterial coating on the surface of the bottom optical coating, and baking and drying at the temperature of 140-160 ℃ for 30-45min until the coating is completely dried. The test results are shown in Table 1

Figure BDA0003009273320000041

TABLE 1

RCA wear resistance: abrasion resistance tester, load 175 g.

Gloss: measured according to the method of GB/T13217.2-2009.

Bacteriostasis: and respectively testing the sterilization rate of the coating film to escherichia coli and staphylococcus aureus within 24 h.

Claims (9)

1. The touch screen antibacterial coating is characterized by comprising a bottom layer optical coating and a surface hardening antibacterial coating, wherein the thickness of the bottom layer optical coating is 20-50 mu m, and the thickness of the surface hardening antibacterial coating is 5-15 mu m.

2. The touch screen antibacterial coating material according to claim 1,

the bottom optical coating comprises the following components in parts by weight: 2-9 parts of polyethylene terephthalate, 15-25 parts of polyurethane resin, 0.1-2 parts of a defoaming agent, 0.1-2 parts of a flatting agent, 0-20 parts of a curing agent and 10-40 parts of a solvent;

the surface hardening antibacterial coating comprises the following components in parts by weight: 2-9 parts of polyethylene terephthalate, 5-9 parts of polyurethane resin, 10-15 parts of epoxy resin, 0-40 parts of metal nanoparticles, 0.1-2 parts of silane coupling agent, 0.1-2 parts of defoaming agent, 0.1-2 parts of flatting agent, 0.1-2 parts of dispersing agent, 0-10 parts of curing agent and 0-20 parts of solvent.

3. The touch screen antibacterial coating material according to claim 2,

the bottom optical coating comprises the following components in parts by weight: 5.5 parts of polyethylene glycol terephthalate, 20 parts of polyurethane resin, 1 part of defoaming agent, 1 part of flatting agent, 10 parts of curing agent and 25 parts of solvent;

the surface hardening antibacterial coating comprises the following components in parts by weight: 5.5 parts of polyethylene terephthalate, 7 parts of polyurethane resin, 12.5 parts of epoxy resin, 20 parts of metal nano particles, 1 part of silane coupling agent, 1 part of defoaming agent, 1 part of flatting agent, 1 part of dispersing agent, 5 parts of curing agent and 10 parts of solvent.

4. The touch screen antibacterial coating of claim 2 or 3, wherein the metal nanoparticles are one or more of nano titanium dioxide, nano silver powder, ceramic powder and chitosan.

5. The touch screen antibacterial coating according to claim 2 or 3, wherein the defoaming agent is a defoaming agent AQUALEN HS01 in the Shanghai unicin chemical industry, a defoaming AMOKSO 7201 in the Shanghai research chemical industry; the leveling agent is a Shanghai millilin chemical leveling agent KL-401 or a Shanghai millilin chemical leveling agent KL-700; the dispersant is an aliphatic dispersant.

6. The touch screen antibacterial coating of claim 2 or 3, wherein the curing agent is one of Coresta L75 isocyanic acid, Wuhan' S Quanxing S-208 isocyanic acid, Coresta L1470 isocyanic acid, Coresta IL 1451 isocyanic acid, and Korea AIJING AK-75 isocyanic acid.

7. The touch screen antibacterial coating according to claim 2 or 3, wherein the solvent is any three of BCS (BCS) in International trade of Beijing Taike Ruidi, PMA in Beihan, Shandong Xu Chen chemical engineering ethyl ester, Shandong Xu Chen chemical engineering butyl ester, DBE in International trade of Beijing Taike Ruidi, Shanghai Min Shih chemical engineering isophorone, Suzhou Hengshu chemical acetophenone, and Wuhan Beizhou Feng butanone.

8. A preparation method of the touch screen antibacterial coating of claim 1, characterized in that the preparation method of the bottom layer optical coating comprises the steps of stirring and mixing polyethylene glycol terephthalate and polyurethane resin for reaction at 20-80 ℃, adding a defoaming agent, a leveling agent, a curing agent and a solvent, dispersing for 10-20 min at the speed of 800-1000 r/min by a high-speed dispersion machine, grinding to the fineness of less than 3 μm after stirring, and uniformly stirring; the preparation method of the surface hardening antibacterial coating comprises the steps of stirring and mixing polyethylene glycol terephthalate, polyurethane resin and epoxy resin for reaction at the temperature of 20-80 ℃, adding metal nanoparticles, a silane coupling agent, a defoaming agent, a leveling agent, a dispersing agent, a curing agent and a solvent, dispersing for 10-20 min at the speed of 800-1000 r/min by using a high-speed dispersion machine, grinding to the fineness of less than 3 mu m after stirring, and stirring uniformly.

9. The touch screen antibacterial coating material according to claim 2 or 3, wherein each coating layer is applied by the following method: firstly, spraying a bottom optical coating on a touch screen glass substrate, and baking and drying the substrate at 90-120 ℃ for 20-30min, wherein the curing rate of the coating is 70%; and then spraying a surface hardening antibacterial coating on the surface of the bottom optical coating, and baking and drying at the temperature of 140-160 ℃ for 30-45min until the coating is completely dried.

CN202110370922.1A 2021-04-07 2021-04-07 Antibacterial coating for touch screen Pending CN113150647A (en)

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CN116251725A (en) * 2023-02-09 2023-06-13 刘彩云 A kind of anti-odor anti-mildew leather and its preparation method and application
EP4223845A1 (en) * 2022-02-07 2023-08-09 B/E Aerospace, Inc. Methods for forming multifunctional barrier coatings with enhanced component positioning
CN118024697A (en) * 2024-02-28 2024-05-14 佛山市奥川顺新材料实业有限公司 Double-layer composite PET protective film and preparation method thereof

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4223845A1 (en) * 2022-02-07 2023-08-09 B/E Aerospace, Inc. Methods for forming multifunctional barrier coatings with enhanced component positioning
CN116251725A (en) * 2023-02-09 2023-06-13 刘彩云 A kind of anti-odor anti-mildew leather and its preparation method and application
CN118024697A (en) * 2024-02-28 2024-05-14 佛山市奥川顺新材料实业有限公司 Double-layer composite PET protective film and preparation method thereof

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