CN105778713A - Antibacterial coating for surface of metalware and preparation of antibacterial coating - Google Patents

Antibacterial coating for surface of metalware and preparation of antibacterial coating Download PDF

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Publication number
CN105778713A
CN105778713A CN201610182459.7A CN201610182459A CN105778713A CN 105778713 A CN105778713 A CN 105778713A CN 201610182459 A CN201610182459 A CN 201610182459A CN 105778713 A CN105778713 A CN 105778713A
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China
Prior art keywords
mixture
metal product
antibiotic paint
antibacterial
product according
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Pending
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CN201610182459.7A
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Chinese (zh)
Inventor
喻倩
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Individual
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Individual
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Priority to CN201610182459.7A priority Critical patent/CN105778713A/en
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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
    • 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
    • C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
    • C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
    • C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • 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
    • C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
    • C09D161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • 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
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • 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
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K

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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)
  • Plant Pathology (AREA)
  • Inorganic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention discloses an antibacterial coating for a surface of metalware and a preparation method of the antibacterial coating. The antibacterial coating is prepared from the following raw materials: 0.5-2wt% of bactericide, 30-70wt% of resin, 20-50wt% of filler, 0.1-10wt% of curing agent and 0.05-20wt% of dispersing agent, wherein the bactericide is selected from one or more of a silver-containing inorganic bactericide, a zinc-containing inorganic bactericide and a titanium-containing inorganic bactericide. The preparation method comprises the following steps: 1) weighing the resin and the filler, mixing uniformly, reacting for 30-90 minutes at a temperature of 70-150 DEG C, finally cooling to 40 DEG C, discharging and filtering the materials by means of a screen to obtain a mixture A; 2) adding the dispersing agent into the mixture A, and mixing uniformly to obtain a mixture B; 3) adding the curing agent into the mixture B, and mixing uniformly to obtain a mixture C; 4) adding the bactericide into the mixture C, and mixing uniformly and sufficiently, and filtering the mixture by means of the screen to obtain the antibacterial coating. When being used for coating the metalware, the antibacterial coating not only has a good antibacterial effect, but also has extremely good resistance to high temperature and wear.

Description

Antibiotic paint for surface of metal product and preparation method thereof
Technical field
The invention belongs to technical field of coatings, relate to a kind of antibiotic paint for surface of metal product and preparation method thereof.
Background technology
Along with metallic article extensively uses in the various fields of recent life of industry, agricultural, service trade and people, to social creativity while increasing value, metallic article is faced with problems, wherein antibacterial problem is the problem that must face and solve in a lot of industry of metallic article and in life, especially for the metallic article being applied in the fields such as kitchen appliance, public article and medical facilities, propose high anti-microbial property requirement especially.
Instantly improve the mode of the anti-microbial property of metallic article, be generally divided into metallic article entirety antimicrobial treatment and antibacterial surface processes two kinds.Wherein, overall antimicrobial treatment is to add a small amount of antibacterial in metallic article preparation process and make metallic article obtain anti-microbial property, and overall antibacterial metal product surface has durable antibiotic, will not lose antibacterial effect because surface is worn.But owing to Cu or Ag that add overall in matrix adds cost, it addition, the overall interpolation of antibacterial can increase difficulty prepared by material.Compared with overall antimicrobial treatment, the antibacterial more advantage of surface treatment.Surface treatment is antibacterial almost can be carried out on any material, it is possible to obtain multiple film system, multiple types, multi-functional, and the antimicrobial surface that technique is prone to optimize, performance is easily controlled processes layer.Such as with ion implanting Ag or Cu, each antibacterial rete of sol-gel method system etc..But wearing no resistance of these retes, antibacterial effect can not be lasting, lack to the anti-biotic material of various bacteria and the excellent bactericidal effect of fungus, use poisonous dangerous, heat-resistant antifriction performance is low, popularizing application prospect is little, universality is poor, base material is required higher, the preparation work of coating is complicated, and the coating cost of raw material and the cost in O&M process are higher.
Summary of the invention
The problem that antibacterial effect is poor and high temperature resistant, anti-wear performance is poor for solving the antimicrobial coating of existing metallic article, the present invention proposes a kind of antibiotic paint for surface of metal product, this antibiotic paint is coated in above metallic article not only good anti-bacterial effect, and has fabulous high temperature resistant and anti-wear performance.
The technical scheme is that and be achieved in that:
A kind of antibiotic paint for surface of metal product, including following raw material: antibacterial 0.5～2wt%, resin 30～70wt%, filler 20～50wt%, firming agent 0.1～10wt% and dispersant 0.05～20wt%, wherein said antibacterial is selected from silver-containing inorganic antibacterial, containing one or more in zinc inorganic fungicide and titaniferous inorganic fungicide.
Further, drier 0.1～2wt% is also included.
Further, described silver-containing inorganic antibacterial is silver nitrate, and described is zinc oxide containing zinc inorganic fungicide, and described titaniferous inorganic fungicide is titanium oxide.
Further, described resin is selected from one or more in epoxy resin, phenolic resin and amino resins.
Further, described filler is selected from one or more in quartz, Anhydrite, Pulvis Talci, carbonitride and boron nitrogen carbon.
Further, described firming agent is selected from one or more in diethyl amino propylamine, glycyl, fatty amine and aromatic amine.
Further, described dispersant is selected from one or more in butyl acetate, Siloxane-Oxyalkylene Copolymers and ethyl acetate.
Further, described drier is selected from one or more in cobalt hydroxide, glycerol, isobutanol, ethylene glycol, ethylene glycol ethyl ester and p-methyl benzenesulfonic acid.
The preparation method that it is a further object to provide a kind of antibiotic paint for surface of metal product, comprises the following steps:
1) weighing resin and filler mixing and stirring, 70～150 DEG C, react 30～90min, be finally cooled to 40 DEG C, discharging, excessively screen filtration obtain mixture A；
2) dispersant is joined in mixture A and be uniformly mixing to obtain mixture B；
3) firming agent joined in mixture B and be uniformly mixing to obtain mixture C；
4) antibacterial is joined in mixture C stir, cross screen filtration, obtain antibiotic paint.
Further, described step 3) in mixture B is additionally added drier 0.1～2wt%.
Using method is as follows: being coated onto through aluminium sheet, tinplate or chromium plating iron-based material with spraying equipment by the antibiotic paint for surface of metal product provided by the invention, target dry film is heavily 12～15g/m2, 150 DEG C of baking ovens toast 30～60s, reach to be fully cured.
Beneficial effects of the present invention:
The antibiotic paint solidification temperature of the present invention is low, and hardening time is short, can be used for not same metal, even the surface treatment of some plastics.Good anti-bacterial effect, high temperature resistant, and staphylococcus aureus and colibacillary antibacterial value both are greater than 4, antibiotic rate reaches 99.99%.Can use under not higher than 650 DEG C of conditions.Hardness is high, resistance to scratching.Antibacterial persistently: antibacterial used is inorganic antiseptic, is combined in coat inside, will not dissociate out due to the existence of organic solvent and water, dauer effect.
Detailed description of the invention
Embodiment 1
A kind of antibiotic paint for surface of metal product, including following raw material: antibacterial 1wt%, mixture (mass ratio of epoxy resin and amino resins the is 2:1) 62wt% of epoxy resin and amino resins, quartz 23wt%, mixture (mass ratio of diethyl amino propylamine and glycyl is 5:3) 2wt% and the butyl acetate 10wt% of diethyl amino propylamine and glycyl, mixture (mass ratio of cobalt hydroxide and glycerol is 4:1) the wherein said antibacterial of 2wt% of cobalt hydroxide and glycerol is the mixture of silver nitrate and zinc oxide, its mass ratio is 3:1.
Preparation method:
First the mixture of epoxy resin and amino resins and quartz being sufficiently mixed under stirring, 130 DEG C, react 80min, be finally cooled to 40 DEG C, discharging, excessively 100 eye mesh screens are filtrated to get mixture A；Butyl acetate is added under stirring; mixture B is obtained after stirring; add the mixture of the diethyl amino propylamine mixture with glycyl and cobalt hydroxide and glycerol under stirring simultaneously; mixture C is obtained after stirring; antibacterial is added under stirring; stir 100 eye mesh screens to filter, obtain antibiotic paint.
Embodiment 2
A kind of antibiotic paint for surface of metal product, including following raw material: antibacterial 0.8wt%, mixture (mass ratio of epoxy resin and amino resins the is 1:1) 43wt% of epoxy resin and amino resins, Anhydrite 42wt%, mixture (mass ratio of diethyl amino propylamine and glycyl is 5:3) 2.2wt% and the butyl acetate 10wt% of diethyl amino propylamine and glycyl, mixture (mass ratio of cobalt hydroxide and glycerol is 4:3) the wherein said antibacterial of 2wt% of cobalt hydroxide and glycerol is the mixture of silver nitrate and titanium oxide, its mass ratio is 3:1.
Preparation method:
First the mixture of epoxy resin and amino resins and Anhydrite being sufficiently mixed under stirring, 120 DEG C, react 90min, be finally cooled to 40 DEG C, discharging, excessively 100 eye mesh screens are filtrated to get mixture A；Butyl acetate is added under stirring; mixture B is obtained after stirring; add the mixture of the diethyl amino propylamine mixture with glycyl and cobalt hydroxide and glycerol under stirring simultaneously; mixture C is obtained after stirring; antibacterial is added under stirring; stir 100 eye mesh screens to filter, obtain antibiotic paint.
Embodiment 3
A kind of antibiotic paint for surface of metal product, including following raw material: antibacterial 2wt%, mixture (mass ratio of epoxy resin and phenolic resin the is 1:1) 56wt% of epoxy resin and phenolic resin, Pulvis Talci 32wt%, mixture (mass ratio of diethyl amino propylamine and glycyl is 5:3) 3.9wt% and the butyl acetate 6wt% of diethyl amino propylamine and glycyl, mixture (mass ratio of cobalt hydroxide and glycerol is 4:3) the wherein said antibacterial of 0.1wt% of cobalt hydroxide and glycerol is the mixture of silver nitrate and titanium oxide, its mass ratio is 3:1.
First the mixture of epoxy resin and phenolic resin and Pulvis Talci being sufficiently mixed under stirring, 70 DEG C, react 90min, be finally cooled to 40 DEG C, discharging, excessively 100 eye mesh screens are filtrated to get mixture A；Butyl acetate is added under stirring; mixture B is obtained after stirring; add the mixture of the diethyl amino propylamine mixture with glycyl and cobalt hydroxide and glycerol under stirring simultaneously; mixture C is obtained after stirring; antibacterial is added under stirring; stir 100 eye mesh screens to filter, obtain antibiotic paint.
Embodiment 4
The antibiotic paint prepared by embodiment 1-3 carries out performance test, and result is in Table 1:
4.1 are coated with steaming and decocting and have predominantly detected: 121 DEG C/60min decocting in water, 121 DEG C/60minNaCl steaming and decocting, the citric acid solution of 121 DEG C/30min mass percent 2% boils, and the new sulfur of 121 DEG C/60min boils.Using the vertical autoclave that Shenan Medical Appliances Factory, Shanghai produces, model: LDZX-30KBS, with specific reference to standard QB/T2763.
4.2 adhesive force tests: acid is boiled, decocting in water, NaCl steaming and decocting, before and after new sulfur boils, draw fork with cross-cut tester, become " # " shape, observe with after the 3M610 tape pull 3 times of 25.4mm, contrast properties difference.
4.3 hardness tests: use Po Sazi pendulum test, fork is deflected 12 °, unclamps fork, start stopwatch, recorded the time of 4 °, with specific reference to standard: GBT1730.
4.4 impact resistance tests: the coat side being coated with by sheet inserts Apparatus for Impacting at low-temp, highly sweeps away from 1m with the weight of 1kg, use microscope to observe degree of impairment, with specific reference to standard QB/T2763.
4.5 antibacterium aptitude tests: use film applicator coating test, using strain is staphylococcus aureus and escherichia coli, with specific reference to standard ISO22196.
4.6 Durability of antimicrobial effects test: acid is boiled, decocting in water, NaCl steaming and decocting, new sulfur boil the sheet after 50 times be coated with according to standard ISO22196 test.
The properties of product test result of table 1 embodiment 1-3
From table 1 it follows that the antibiotic paint for surface of metal product that embodiment of the present invention 1-3 prepares, its in anti-cooking characteristic, hardness performance, shock resistance, anti-microbial property (including persistency) etc. all far above industry standard.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.

Claims (10)

1. the antibiotic paint for surface of metal product, it is characterized in that, including following raw material: antibacterial 0.5～2wt%, resin 30～70wt%, filler 20～50wt%, firming agent 0.1～10wt% and dispersant 0.05～20wt%, wherein said antibacterial is selected from silver-containing inorganic antibacterial, containing one or more in zinc inorganic fungicide and titaniferous inorganic fungicide.
2. the antibiotic paint for surface of metal product according to claim 1, it is characterised in that also include drier 0.1～2wt%.
3. the antibiotic paint for surface of metal product according to claim 1 and 2, it is characterised in that described silver-containing inorganic antibacterial is silver nitrate, described is zinc oxide containing zinc inorganic fungicide, and described titaniferous inorganic fungicide is titanium oxide.
4. the antibiotic paint for surface of metal product according to claim 1 and 2, it is characterised in that described resin is selected from one or more in epoxy resin, phenolic resin and amino resins.
5. the antibiotic paint for surface of metal product according to claim 1 and 2, it is characterised in that described filler is selected from one or more in quartz, Anhydrite, Pulvis Talci, carbonitride and boron nitrogen carbon.
6. the antibiotic paint for surface of metal product according to claim 1 and 2, it is characterised in that described firming agent is selected from one or more in diethyl amino propylamine, glycyl, fatty amine and aromatic amine.
7. the antibiotic paint for surface of metal product according to claim 1 and 2, it is characterised in that described dispersant is selected from one or more in butyl acetate, Siloxane-Oxyalkylene Copolymers and ethyl acetate.
8. the antibiotic paint for surface of metal product according to claim 2, it is characterised in that described drier is selected from one or more in cobalt hydroxide, glycerol, isobutanol, ethylene glycol, ethylene glycol ethyl ester and p-methyl benzenesulfonic acid.
9. the preparation method of the antibiotic paint being used for surface of metal product as claimed in claim 1, it is characterised in that comprise the following steps:
1) weighing resin and filler mixing and stirring, 70～150 DEG C, react 30～90min, be finally cooled to 40 DEG C, discharging, excessively screen filtration obtain mixture A；
2) dispersant is joined in mixture A and be uniformly mixing to obtain mixture B；
3) firming agent joined in mixture B and be uniformly mixing to obtain mixture C；
4) antibacterial is joined in mixture C stir, cross screen filtration, obtain antibiotic paint.
10. the preparation method of the antibiotic paint for surface of metal product according to claim 9, it is characterised in that described step 3) in mixture B is additionally added drier 0.1～2wt%.
CN201610182459.7A 2016-03-26 2016-03-26 Antibacterial coating for surface of metalware and preparation of antibacterial coating Pending CN105778713A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610182459.7A CN105778713A (en) 2016-03-26 2016-03-26 Antibacterial coating for surface of metalware and preparation of antibacterial coating

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Application Number Priority Date Filing Date Title
CN201610182459.7A CN105778713A (en) 2016-03-26 2016-03-26 Antibacterial coating for surface of metalware and preparation of antibacterial coating

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106756493A (en) * 2016-12-16 2017-05-31 安徽宝恒新材料科技有限公司 A kind of stainless steel cabinet matrixes for embossing
CN106756613A (en) * 2016-12-16 2017-05-31 安徽宝恒新材料科技有限公司 A kind of anti-bacteria stainless steel
CN107936630A (en) * 2017-12-01 2018-04-20 河南省健琪医疗器械有限公司 A kind of medical instrument special surface antimicrobial coating and its preparation process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0860036A (en) * 1994-08-19 1996-03-05 Nippon Ester Co Ltd Antibacterial antifungal polyester resin composition for powder coating
CN1343746A (en) * 2001-10-25 2002-04-10 四川升达林产有限公司 Antibacterial antimildew surface decorative material and its application method
CN101397414A (en) * 2008-10-29 2009-04-01 沈阳化工学院 High abrasion-proof and anti static antibacterial coating
CN101486863A (en) * 2008-01-18 2009-07-22 深圳市海川实业股份有限公司 Environment friendly waterborne paint and preparation thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0860036A (en) * 1994-08-19 1996-03-05 Nippon Ester Co Ltd Antibacterial antifungal polyester resin composition for powder coating
CN1343746A (en) * 2001-10-25 2002-04-10 四川升达林产有限公司 Antibacterial antimildew surface decorative material and its application method
CN101486863A (en) * 2008-01-18 2009-07-22 深圳市海川实业股份有限公司 Environment friendly waterborne paint and preparation thereof
CN101397414A (en) * 2008-10-29 2009-04-01 沈阳化工学院 High abrasion-proof and anti static antibacterial coating

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106756493A (en) * 2016-12-16 2017-05-31 安徽宝恒新材料科技有限公司 A kind of stainless steel cabinet matrixes for embossing
CN106756613A (en) * 2016-12-16 2017-05-31 安徽宝恒新材料科技有限公司 A kind of anti-bacteria stainless steel
CN107936630A (en) * 2017-12-01 2018-04-20 河南省健琪医疗器械有限公司 A kind of medical instrument special surface antimicrobial coating and its preparation process

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