CN112608670A - Water-based antibacterial modified polyurethane coating and preparation method thereof - Google Patents
Water-based antibacterial modified polyurethane coating and preparation method thereof Download PDFInfo
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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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
- 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
Abstract
The invention discloses a water-based antibacterial modified polyurethane coating, which comprises the following raw materials in percentage by weight of 100: 1-2; the main materials comprise the following raw materials in parts by weight: 50-70 parts of aqueous hydroxy acrylic acid dispersoid, 4-10 parts of beta-cyclodextrin, 50-70 parts of sodium hydroxide solution, 1-2 parts of antibacterial agent, 30-60 parts of polyethylene glycol, 1-2 parts of tween 80, 10-15 parts of n-octane, 1-3 parts of diphenylmethane diisocyanate, 5-15 parts of cyclohexane, 0.5-1.5 parts of pigment, 4-10 parts of filler, 1-3 parts of film forming additive, 1-2 parts of thickening agent, 1-5 parts of pH value regulator and 10-18 parts of water; the curing agent comprises the following raw materials in parts by weight: 30-60 parts of hydrophilic aliphatic isocyanate, 2-8 parts of dodecanol and 1-5 parts of propylene glycol methyl ether acetate; the invention also discloses a preparation method of the water-based antibacterial modified polyurethane coating. The invention not only has good physical and mechanical properties of the paint film, but also overcomes the defect that the antibacterial property of the paint film is influenced by the dissociation of the conventional antibacterial agent in the paint film because the antibacterial agent becomes a part of a network system, thereby having profound social benefits and obvious economic benefits.
Description
Technical Field
The invention relates to the technical field of polyurethane coatings, in particular to a water-based antibacterial modified polyurethane coating and a preparation method thereof.
Background
The solvent-based two-component polyurethane coating contains a large amount of solvent, so that the solvent-based two-component polyurethane coating causes great damage to constructors and the environment, an automobile is a large part in articles for daily use and is long in service time, and the smell and the re-adhesiveness of the solvent-based elastic coating cause poor use experience of customers.
The aqueous polyurethane coating is a coating which takes aqueous polyurethane resin as a base material and water as a dispersion medium, has the advantages of no toxicity, no odor, no pollution, difficult combustion, low cost, difficult damage to the coated surface, easy construction, easy cleaning and the like, and also has the excellent performances of high hardness, wear resistance and the like inherent in the solvent type polyurethane coating, so the aqueous polyurethane coating is widely applied to various fields of woodware coating, automobile coating, building coating, plastic coating, paper coating, fabric and leather coating and the like.
The performance of the existing polyurethane coating has defects, mainly expressed in that the impact resistance effect is poor and the antibacterial performance can not meet the requirements, so that the development of the water-soluble polyurethane waterproof antibacterial coating with better performance has far-reaching social benefits and obvious economic benefits.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a water-based antibacterial modified polyurethane coating and a preparation method thereof.
The invention provides a waterborne antibacterial modified polyurethane coating, which comprises the following raw materials in a weight ratio of 100: 1-2;
the main materials comprise the following raw materials in parts by weight: 50-70 parts of aqueous hydroxy acrylic acid dispersoid, 4-10 parts of beta-cyclodextrin, 50-70 parts of sodium hydroxide solution, 1-2 parts of antibacterial agent, 30-60 parts of polyethylene glycol, 1-2 parts of tween 80, 10-15 parts of n-octane, 1-3 parts of diphenylmethane diisocyanate, 5-15 parts of cyclohexane, 0.5-1.5 parts of pigment, 4-10 parts of filler, 1-3 parts of film forming additive, 1-2 parts of thickening agent, 1-5 parts of pH value regulator and 10-18 parts of water;
the curing agent comprises the following raw materials in parts by weight: 30-60 parts of hydrophilic aliphatic isocyanate, 2-8 parts of lauryl alcohol and 1-5 parts of propylene glycol methyl ether acetate.
Preferably, the antimicrobial agent is a natural antimicrobial agent.
Preferably, the natural antibacterial agent is chitin.
Preferably, the number average molecular weight of the polyethylene glycol is 1000-1500.
Preferably, the concentration of the sodium hydroxide solution is 0.8 to 1.6 mol/L.
Preferably, the pigment is at least one of titanium dioxide, red iron oxide, yellow iron oxide and carbon black.
Preferably, the filler is at least one of precipitated barium sulfate, superfine talcum powder, heavy calcium carbonate and calcined kaolin.
Preferably, the film forming aid is diethylene glycol butyl ether and/or trimethyl pentanediol monobutyrate.
Preferably, the thickener is fumed silica and/or nano-attapulgite.
Preferably, the pH regulator is ammonia.
The invention also provides a preparation method of the water-based antibacterial modified polyurethane coating, which comprises the following steps:
s1, feeding beta-cyclodextrin into a sodium hydroxide solution, stirring for 10-20min at the temperature of 60-80 ℃, adding an antibacterial agent under the stirring state, carrying out ultrasonic treatment for 1-2h with the ultrasonic power of 300-400W and the ultrasonic frequency of 10-25kHz, removing the solvent by rotary evaporation, drying, adding into polyethylene glycol at the temperature of 50-60 ℃ under the stirring state with the stirring speed of 10000-12000r/min, and filtering to obtain a prefabricated material a;
s2, mixing Tween 80 and n-octane, stirring at the speed of 4000-;
s3, dissolving diphenylmethane diisocyanate in cyclohexane, adding the obtained product into the prefabricated material b under a stirring state, reacting at the temperature of 110-120 ℃ for 20-30min, performing suction filtration, washing with ethanol, drying at the temperature of 50-60 ℃ to obtain particles with the particle size of 100-500 mu m, sequentially adding water, pigment and filler, fully and uniformly stirring, adding the aqueous hydroxy acrylic acid dispersion, uniformly stirring, sequentially adding the film-forming assistant, the thickening agent and the pH value regulator, and stirring for 10-20min to obtain the main material;
s4, feeding the hydrophilic aliphatic isocyanate into a stirring kettle, adding dodecyl alcohol and propylene glycol methyl ether acetate, stirring for 10-20min at a stirring speed of 1500-3000r/min, and filtering to obtain the curing agent.
The technical effects of the invention are as follows:
the invention adopts beta-cyclodextrin to include the antibacterial agent, particularly when natural antibacterial agent chitin is adopted, the heat resistance is poor, the antibacterial agent can be effectively prevented from losing and inactivating in subsequent high-temperature treatment after inclusion, the continuous antibacterial effect can be achieved through slow release, polyethylene glycol with the number average molecular weight of 1000-1500 is in a wax-like structure at normal temperature, the coated antibacterial agent is uniformly dispersed in the antibacterial agent as dispersed phase particles after being melted at 50-60 ℃ under the stirring state, the formed mixed system reacts with diphenylmethane diisocyanate to form particles with the particle size of 100-1500 mu m, the particles are uniformly dispersed in a coating in a dispersed phase manner, the processing fluidity of the coating is improved, the toughening of the coating can be realized, the viscosity of the coating can be promoted to be rapidly increased along with the increase of external impact strength after strong impact is applied, the hardness is gradually increased, so that the system absorbs and dissipates part of energy, thereby toughening the coating, even if the coating is subjected to extremely high impact, the surface of the coating can even be converted into a high-hardness solid state, and particularly, the coating has the characteristics of higher impact strength and better impact resistance, and can be quickly recovered to the original state along with the disappearance of the impact, the state is reversible, and the service life of the coating is extremely long; the water-based hydroxyl acrylic acid dispersoid is added as a main film forming substance to carry out chemical crosslinking reaction with hydrophilic aliphatic isocyanate, the product has good compatibility with the formed particles, gaps among hydroxyl acrylic acid latex particles with macromolecular structures are filled during film forming, so that the film has better compactness, the film has good crosslinking density, the coating is endowed with excellent weather resistance and water resistance, the physical and mechanical properties of the film are good, and the antibacterial particles become a part of a network system, thereby overcoming the defect that the antibacterial property of the film is influenced by the dissociation of a conventional antibacterial agent in the film.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
The water-based antibacterial modified polyurethane coating comprises the following raw materials of a main material and a curing agent, wherein the weight ratio of the main material to the curing agent is 100: 1;
the main materials comprise: 50kg of aqueous hydroxyacrylic acid dispersion, 4kg of beta-cyclodextrin, 50-kg of 0.8mol/L sodium hydroxide solution, 1kg of antibacterial agent, 30kg of 1500-polyethylene glycol with the number average molecular weight of 1000, 1kg of Tween 80, 10kg of n-octane, 1kg of diphenylmethane diisocyanate, 5kg of cyclohexane, 0.5kg of pigment, 4kg of filler, 1kg of film-forming aid, 1kg of thickener, 1kg of pH value regulator and 10kg of water;
the curing agent comprises the following raw materials: 30kg of hydrophilic aliphatic isocyanate, 2kg of dodecanol and 1kg of propylene glycol methyl ether acetate;
the preparation method of the water-based antibacterial modified polyurethane coating comprises the following steps:
s1, feeding beta-cyclodextrin into a sodium hydroxide solution, stirring for 10min at the temperature of 60 ℃, adding an antibacterial agent in a stirring state, carrying out ultrasonic treatment for 1h with the ultrasonic power of 300W and the ultrasonic frequency of 10kHz, removing a solvent by rotary evaporation, drying, adding into polyethylene glycol at the temperature of 50 ℃ in a stirring state at the stirring speed of 10000r/min, and filtering to obtain a prefabricated material a;
s2, mixing Tween 80 and n-octane, stirring at the speed of 4000r/min for 4min, raising the temperature to 50 ℃, adding the prefabricated material a under the stirring state, and uniformly stirring to obtain a prefabricated material b;
s3, dissolving diphenylmethane diisocyanate in cyclohexane, adding the solution into the prefabricated material b under a stirring state, reacting at 110 ℃ for 20min, performing suction filtration, washing with ethanol, drying at 50 ℃ to obtain particles with the particle size of 100-;
and S4, feeding the hydrophilic aliphatic isocyanate into a stirring kettle, adding dodecyl alcohol and propylene glycol methyl ether acetate, stirring for 10min at the stirring speed of 1500r/min, and filtering to obtain the curing agent.
Example 2
The water-based antibacterial modified polyurethane coating comprises the following raw materials of a main material and a curing agent, wherein the weight ratio of the main material to the curing agent is 100: 2;
the main materials comprise: 70kg of aqueous hydroxy acrylic acid dispersoid, 10kg of beta-cyclodextrin, 70kg of 1.6mol/L sodium hydroxide solution, 2kg of chitin, 60kg of 1500 polyethylene glycol with the number average molecular weight of 1000, 2kg of Tween 80, 15kg of normal octane, 3kg of diphenylmethane diisocyanate, 15kg of cyclohexane, 1.5kg of iron oxide red, 10kg of heavy calcium carbonate, 3kg of diethylene glycol monobutyl ether, 2kg of fumed silica, 5kg of ammonia water and 18kg of water;
the curing agent comprises the following raw materials: 60kg of hydrophilic aliphatic isocyanate, 8kg of dodecanol and 5kg of propylene glycol monomethyl ether acetate;
the preparation method of the water-based antibacterial modified polyurethane coating comprises the following steps:
s1, feeding beta-cyclodextrin into a sodium hydroxide solution, stirring for 20min at the temperature of 80 ℃, adding chitin in a stirring state, carrying out ultrasonic treatment for 2h with the ultrasonic power of 400W and the ultrasonic frequency of 25kHz, removing a solvent by rotary evaporation, drying, adding into polyethylene glycol at the temperature of 60 ℃ in a stirring state at the stirring speed of 12000r/min, and filtering to obtain a prefabricated material a;
s2, mixing Tween 80 and n-octane, stirring at 6000r/min for 10min, raising the temperature to 60 ℃, adding the prefabricated material a under the stirring state, and uniformly stirring to obtain a prefabricated material b;
s3, dissolving diphenylmethane diisocyanate in cyclohexane, adding the obtained product into the prefabricated material b under a stirring state, reacting at 120 ℃ for 30min, performing suction filtration, washing with ethanol, drying at 60 ℃ to obtain particles with the particle size of 100-;
and S4, feeding the hydrophilic aliphatic isocyanate into a stirring kettle, adding dodecyl alcohol and propylene glycol methyl ether acetate, stirring for 20min at the stirring speed of 3000r/min, and filtering to obtain the curing agent.
Example 3
The water-based antibacterial modified polyurethane coating comprises the following raw materials of a main material and a curing agent, wherein the weight ratio of the main material to the curing agent is 100: 1.2;
the main materials comprise: 55kg of aqueous hydroxy acrylic acid dispersoid, 5kg of beta-cyclodextrin, 55kg of 1mol/L sodium hydroxide solution with the concentration, 1.2kg of chitin, 35kg of 1500 polyethylene glycol with the number average molecular weight of 1000, 1.2kg of Tween 80, 12kg of n-octane, 1.2kg of diphenylmethane diisocyanate, 7kg of cyclohexane, 0.8kg of iron oxide yellow, 5kg of heavy calcium carbonate, 1.5kg of trimethylpentanediol monobutyrate, 1.2kg of nano-attapulgite, 3kg of ammonia water and 12kg of water;
the curing agent comprises the following raw materials: 35kg of hydrophilic aliphatic isocyanate, 4kg of dodecanol and 2kg of propylene glycol methyl ether acetate;
the preparation method of the water-based antibacterial modified polyurethane coating comprises the following steps:
s1, feeding beta-cyclodextrin into a sodium hydroxide solution, stirring for 12min at 65 ℃, adding chitin under a stirring state, carrying out ultrasonic treatment for 1h with ultrasonic power of 330W and ultrasonic frequency of 16kHz, removing a solvent by rotary evaporation, drying, adding into polyethylene glycol at 52 ℃ under a stirring state, stirring at 10000r/min, and filtering to obtain a prefabricated material a;
s2, mixing Tween 80 and n-octane, stirring for 5min at the speed of 4200r/min, raising the temperature to 51 ℃, adding the prefabricated material a under the stirring state, and uniformly stirring to obtain a prefabricated material b;
s3, dissolving diphenylmethane diisocyanate in cyclohexane, adding the obtained product into the prefabricated material b under a stirring state, reacting at the temperature of 114 ℃ for 24min, performing suction filtration, washing with ethanol, drying at the temperature of 53 ℃ to obtain particles with the particle size of 100-;
and S4, feeding the hydrophilic aliphatic isocyanate into a stirring kettle, adding dodecyl alcohol and propylene glycol monomethyl ether acetate, stirring for 12min at the stirring speed of 1600r/min, and filtering to obtain the curing agent.
Example 4
The water-based antibacterial modified polyurethane coating comprises the following raw materials of a main material and a curing agent, wherein the weight ratio of the main material to the curing agent is 100: 1.8;
the main materials comprise: 62kg of aqueous hydroxy acrylic acid dispersoid, 8kg of beta-cyclodextrin, 65kg of sodium hydroxide solution with the concentration of 1.4mol/L, 1.6kg of chitin, 50kg of 1500-polyethylene glycol with the number average molecular weight of 1000, 1.8kg of Tween 80, 14kg of normal octane, 2kg of diphenylmethane diisocyanate, 12kg of cyclohexane, 1.4kg of carbon black, 8kg of precipitated barium sulfate, 2kg of diethylene glycol monobutyl ether, 1.8kg of nano attapulgite, 3kg of ammonia water and 156kg of water;
the curing agent comprises the following raw materials: 55kg of hydrophilic aliphatic isocyanate, 7kg of dodecanol and 4kg of propylene glycol methyl ether acetate;
the preparation method of the water-based antibacterial modified polyurethane coating comprises the following steps:
s1, feeding beta-cyclodextrin into a sodium hydroxide solution, stirring for 18min at the temperature of 75 ℃, adding chitin under a stirring state, carrying out ultrasonic treatment for 1.5h with the ultrasonic power of 380W and the ultrasonic frequency of 20kHz, removing a solvent by rotary evaporation, drying, adding into polyethylene glycol at the temperature of 58 ℃ under a stirring state at the stirring speed of 11000r/min, and filtering to obtain a prefabricated material a;
s2, mixing Tween 80 and n-octane, stirring at a speed of 5500/min for 8min, raising the temperature to 58 ℃, adding the prefabricated material a under the stirring state, and uniformly stirring to obtain a prefabricated material b;
s3, dissolving diphenylmethane diisocyanate in cyclohexane, adding the obtained product into the prefabricated material b under a stirring state, reacting at 118 ℃ for 28min, performing suction filtration, washing with ethanol, drying at 58 ℃ to obtain particles with the particle size of 100-;
and S4, feeding the hydrophilic aliphatic isocyanate into a stirring kettle, adding dodecyl alcohol and propylene glycol monomethyl ether acetate, stirring for 19min at the stirring speed of 2800r/min, and filtering to obtain the curing agent.
Example 5
The water-based antibacterial modified polyurethane coating comprises the following raw materials of a main material and a curing agent, wherein the weight ratio of the main material to the curing agent is 100: 1.5;
the main materials comprise: 60kg of aqueous hydroxy acrylic acid dispersion, 6kg of beta-cyclodextrin, 50kg of 1.2mol/L sodium hydroxide solution with the concentration, 1.5kg of chitin, 40kg of polyethylene glycol with the number average molecular weight of 1000, 1.6kg of Tween 80, 12kg of n-octane, 2kg of diphenylmethane diisocyanate, 10kg of cyclohexane, 1.2kg of titanium dioxide, 6kg of superfine talcum powder, 2kg of diethylene glycol monobutyl ether, 1.5kg of fumed silica, 3kg of ammonia water and 14kg of water;
the curing agent comprises the following raw materials: 50kg of hydrophilic aliphatic isocyanate, 5kg of dodecanol and 3kg of propylene glycol methyl ether acetate;
the preparation method of the water-based antibacterial modified polyurethane coating comprises the following steps:
s1, feeding beta-cyclodextrin into a sodium hydroxide solution, stirring for 15min at the temperature of 70 ℃, adding chitin in a stirring state, carrying out ultrasonic treatment for 1h with the ultrasonic power of 380W and the ultrasonic frequency of 21kHz, removing a solvent by rotary evaporation, drying, adding into polyethylene glycol at the temperature of 55 ℃ in a stirring state at the stirring speed of 11000r/min, and filtering to obtain a prefabricated material a;
s2, mixing Tween 80 and n-octane, stirring at the speed of 5000r/min for 5min, raising the temperature to 55 ℃, adding the prefabricated material a under the stirring state, and uniformly stirring to obtain a prefabricated material b;
s3, dissolving diphenylmethane diisocyanate in cyclohexane, adding the dissolved diphenylmethane diisocyanate into the prefabricated material b under a stirring state, reacting at the temperature of 115 ℃ for 25min, performing suction filtration, washing with ethanol, drying at the temperature of 55 ℃ to obtain particles with the particle size of 100-;
and S4, feeding the hydrophilic aliphatic isocyanate into a stirring kettle, adding the dodecyl alcohol and the propylene glycol methyl ether acetate, stirring for 15min at the stirring speed of 2000r/min, and filtering to obtain the curing agent.
Comparative example 1
The water-based antibacterial modified polyurethane coating comprises the following raw materials of a main material and a curing agent, wherein the weight ratio of the main material to the curing agent is 100: 1.5;
the main materials comprise: 60kg of aqueous hydroxy acrylic acid dispersoid, 1.5kg of chitin, 1.2kg of titanium dioxide, 6kg of superfine talcum powder, 2kg of diethylene glycol monobutyl ether, 1.5kg of fumed silica, 3kg of ammonia water and 14kg of water;
the curing agent comprises the following raw materials: 50kg of hydrophilic aliphatic isocyanate, 5kg of dodecanol and 3kg of propylene glycol methyl ether acetate;
the preparation method of the water-based antibacterial modified polyurethane coating comprises the following steps:
s1, fully and uniformly stirring chitin, water, titanium dioxide and superfine talcum powder, adding the aqueous hydroxy acrylic acid dispersion, uniformly stirring, sequentially adding diethylene glycol monobutyl ether, fumed silica and ammonia water, and stirring for 16min to obtain a main material;
and S2, feeding the hydrophilic aliphatic isocyanate into a stirring kettle, adding the dodecyl alcohol and the propylene glycol methyl ether acetate, stirring for 15min at the stirring speed of 2000r/min, and filtering to obtain the curing agent.
Comparative example 2
The water-based antibacterial modified polyurethane coating comprises the following raw materials of a main material and a curing agent, wherein the weight ratio of the main material to the curing agent is 100: 1.5;
the main materials comprise: 60kg of aqueous hydroxy acrylic acid dispersion, 1.5kg of chitin, 1.6kg of Tween 80, 12kg of n-octane, 2kg of diphenylmethane diisocyanate, 10kg of cyclohexane, 1.2kg of titanium dioxide, 6kg of superfine talcum powder, 2kg of diethylene glycol monobutyl ether, 1.5kg of fumed silica, 3kg of ammonia water and 14kg of water;
the curing agent comprises the following raw materials: 50kg of hydrophilic aliphatic isocyanate, 5kg of dodecanol and 3kg of propylene glycol methyl ether acetate;
the preparation method of the water-based antibacterial modified polyurethane coating comprises the following steps:
s1, mixing Tween 80 and n-octane, stirring at a speed of 5000r/min for 5min, raising the temperature to 55 ℃, adding chitin under a stirring state, and stirring uniformly to obtain a prefabricated material;
s2, dissolving diphenylmethane diisocyanate in cyclohexane, adding the dissolved diphenylmethane diisocyanate into the prefabricated material under a stirring state, reacting at the temperature of 115 ℃ for 25min, performing suction filtration, washing with ethanol, drying at the temperature of 55 ℃ to obtain particles with the particle size of 100-plus 500 mu m, sequentially adding water, titanium dioxide and superfine talcum powder, fully and uniformly stirring, adding the aqueous hydroxy acrylic acid dispersion, uniformly stirring, sequentially adding diethylene glycol butyl ether, fumed silica and ammonia water, and stirring for 16min to obtain a main material;
and S3, feeding the hydrophilic aliphatic isocyanate into a stirring kettle, adding the dodecyl alcohol and the propylene glycol methyl ether acetate, stirring for 15min at the stirring speed of 2000r/min, and filtering to obtain the curing agent.
Comparative example 3
The water-based antibacterial modified polyurethane coating comprises the following raw materials of a main material and a curing agent, wherein the weight ratio of the main material to the curing agent is 100: 1.5;
the main materials comprise: 60kg of aqueous hydroxy acrylic acid dispersion, 6kg of zeolite, 50kg of 1.2mol/L sodium hydroxide solution with the concentration, 1.5kg of chitin, 40kg of polyethylene glycol with the number average molecular weight of 1000, 1.6kg of Tween 80, 12kg of normal octane, 2kg of diphenylmethane diisocyanate, 10kg of cyclohexane, 1.2kg of titanium dioxide, 6kg of superfine talcum powder, 2kg of diethylene glycol monobutyl ether, 1.5kg of fumed silica, 3kg of ammonia water and 14kg of water;
the curing agent comprises the following raw materials: 50kg of hydrophilic aliphatic isocyanate, 5kg of dodecanol and 3kg of propylene glycol methyl ether acetate;
the preparation method of the water-based antibacterial modified polyurethane coating comprises the following steps:
s1, adding zeolite into a sodium hydroxide solution, stirring for 15min at 70 ℃, adding chitin under a stirring state, carrying out ultrasonic treatment for 1h, wherein the ultrasonic power is 380W, the ultrasonic frequency is 21kHz, removing the solvent by rotary evaporation, drying, adding into polyethylene glycol at 55 ℃ under a stirring state, and the stirring speed is 11000r/min, and filtering to obtain a prefabricated material a;
s2, mixing Tween 80 and n-octane, stirring at the speed of 5000r/min for 5min, raising the temperature to 55 ℃, adding the prefabricated material a under the stirring state, and uniformly stirring to obtain a prefabricated material b;
s3, dissolving diphenylmethane diisocyanate in cyclohexane, adding the dissolved diphenylmethane diisocyanate into the prefabricated material b under a stirring state, reacting at the temperature of 115 ℃ for 25min, performing suction filtration, washing with ethanol, drying at the temperature of 55 ℃ to obtain particles with the particle size of 100-;
and S4, feeding the hydrophilic aliphatic isocyanate into a stirring kettle, adding the dodecyl alcohol and the propylene glycol methyl ether acetate, stirring for 15min at the stirring speed of 2000r/min, and filtering to obtain the curing agent.
The aqueous antibacterial modified polyurethane coating obtained in example 5 and comparative examples 1 to 3 was applied to the surface of a polypropylene sheet to obtain a coating having a film thickness of 50 μm, and then subjected to a performance test, the results of which were as follows:
the polypropylene sheet coated with the water-based antibacterial modified polyurethane coating is placed in a constant temperature and humidity box, the antibacterial performance of the sheet is respectively tested according to national standard QB/T2591-:
| test items | Antibacterial rate of Staphylococcus aureus% | Escherichia coli, based on |
| Example 5 | 99.6％ | 98.7％ |
| Comparative example 1 | 98.5％ | 86.5％ |
| Comparative example 2 | 91.5％ | 92.6％ |
| Comparative example 3 | 94.6％ | 91.2％ |
The antimicrobial rates of example 5 and comparative examples 1 to 3 against staphylococcus aureus over time when the test sheets were left for 1 day, 7 days and 30 days are shown in the following table:
| test items | 1 day | 7 days | 30 days |
| Example 5 | 99.6％ | 99.1％ | 98.6％ |
| Comparative example 1 | 98.5％ | 72.3％ | 64.1％ |
| Comparative example 2 | 91.5％ | 78.4％ | 71.6％ |
| Comparative example 3 | 94.6％ | 81.2％ | 79.5％ |
The limit value of the content (VOC) of the volatile organic compounds of the waterborne coating provided by the invention is less than or equal to 250g/L according to the specification of the waterborne coating in HJ/T201-2005 environmental marking product technical requirement waterborne coating. The VOC content is tested to be 40-60g/L, and the product is determined to be an environment-friendly green product.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The water-based antibacterial modified polyurethane coating is characterized by comprising the following raw materials in parts by weight: 1-2;
the main materials comprise the following raw materials in parts by weight: 50-70 parts of aqueous hydroxy acrylic acid dispersoid, 4-10 parts of beta-cyclodextrin, 50-70 parts of sodium hydroxide solution, 1-2 parts of antibacterial agent, 30-60 parts of polyethylene glycol, 1-2 parts of tween 80, 10-15 parts of n-octane, 1-3 parts of diphenylmethane diisocyanate, 5-15 parts of cyclohexane, 0.5-1.5 parts of pigment, 4-10 parts of filler, 1-3 parts of film forming additive, 1-2 parts of thickening agent, 1-5 parts of pH value regulator and 10-18 parts of water;
the curing agent comprises the following raw materials in parts by weight: 30-60 parts of hydrophilic aliphatic isocyanate, 2-8 parts of lauryl alcohol and 1-5 parts of propylene glycol methyl ether acetate.
2. The aqueous antibacterial modified polyurethane coating according to claim 1, wherein the antibacterial agent is a natural antibacterial agent; preferably, the natural antibacterial agent is chitin.
3. The waterborne antibacterial modified polyurethane coating as claimed in claim 1, wherein the number average molecular weight of the polyethylene glycol is 1000-1500.
4. The aqueous antibacterial modified polyurethane coating according to claim 1, wherein the concentration of the sodium hydroxide solution is 0.8 to 1.6 mol/L.
5. The aqueous antibacterial modified polyurethane coating according to claim 1, wherein the pigment is at least one of titanium dioxide, red iron oxide, yellow iron oxide and carbon black.
6. The waterborne antibacterial modified polyurethane coating of claim 1, wherein the filler is at least one of precipitated barium sulfate, ultrafine talc, ground calcium carbonate, and calcined kaolin.
7. The waterborne antibacterial modified polyurethane coating of claim 1, wherein the film forming aid is diethylene glycol monobutyl ether and/or trimethyl pentanediol monobutyrate.
8. The aqueous antibacterial modified polyurethane coating according to claim 1, wherein the thickener is fumed silica and/or nano-attapulgite.
9. The aqueous antibacterial modified polyurethane coating according to claim 1, wherein the pH adjuster is ammonia water.
10. A method for preparing the aqueous antibacterial modified polyurethane coating according to any one of claims 1 to 9, which is characterized by comprising the following steps:
s1, feeding beta-cyclodextrin into a sodium hydroxide solution, stirring for 10-20min at the temperature of 60-80 ℃, adding an antibacterial agent under the stirring state, carrying out ultrasonic treatment for 1-2h with the ultrasonic power of 300-400W and the ultrasonic frequency of 10-25kHz, removing the solvent by rotary evaporation, drying, adding into polyethylene glycol at the temperature of 50-60 ℃ under the stirring state with the stirring speed of 10000-12000r/min, and filtering to obtain a prefabricated material a;
s2, mixing Tween 80 and n-octane, stirring at the speed of 4000-;
s3, dissolving diphenylmethane diisocyanate in cyclohexane, adding the obtained product into the prefabricated material b under a stirring state, reacting at the temperature of 110-120 ℃ for 20-30min, performing suction filtration, washing with ethanol, drying at the temperature of 50-60 ℃ to obtain particles with the particle size of 100-500 mu m, sequentially adding water, pigment and filler, fully and uniformly stirring, adding the aqueous hydroxy acrylic acid dispersion, uniformly stirring, sequentially adding the film-forming assistant, the thickening agent and the pH value regulator, and stirring for 10-20min to obtain the main material;
s4, feeding the hydrophilic aliphatic isocyanate into a stirring kettle, adding dodecyl alcohol and propylene glycol methyl ether acetate, stirring for 10-20min at a stirring speed of 1500-3000r/min, and filtering to obtain the curing agent.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115584183A (en) * | 2022-09-29 | 2023-01-10 | 百草边大生物科技(青岛)有限公司 | A macrobiological functional agent containing naringin and cepharanthine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701128A (en) * | 2009-11-26 | 2010-05-05 | 江苏兰陵高分子材料有限公司 | Water-based two-pack polyurethane preservative coating and preparation method thereof |
| CN102391519A (en) * | 2011-12-26 | 2012-03-28 | 北京理工大学 | Method for preparing chitosan immobilized cyclodextrin derivative from chitin |
| CN107652663A (en) * | 2017-11-14 | 2018-02-02 | 东莞市鑫益电子科技有限公司 | A kind of preparation method of antibacterial modified polyurethane material |
| CN108384428A (en) * | 2018-02-12 | 2018-08-10 | 唐山德生科技有限公司 | A kind of fast light antibacterial water color polyurethane coating and preparation method thereof |
| CN109096904A (en) * | 2018-08-21 | 2018-12-28 | 青岛科技大学 | A kind of long-lasting antibacterial polyurethane coating and preparation method thereof |
| CN109096905A (en) * | 2018-08-21 | 2018-12-28 | 青岛科技大学 | A kind of long-lasting antibacterial modified polyurethane and preparation method thereof |
-
2020
- 2020-12-02 CN CN202011410718.XA patent/CN112608670A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701128A (en) * | 2009-11-26 | 2010-05-05 | 江苏兰陵高分子材料有限公司 | Water-based two-pack polyurethane preservative coating and preparation method thereof |
| CN102391519A (en) * | 2011-12-26 | 2012-03-28 | 北京理工大学 | Method for preparing chitosan immobilized cyclodextrin derivative from chitin |
| CN107652663A (en) * | 2017-11-14 | 2018-02-02 | 东莞市鑫益电子科技有限公司 | A kind of preparation method of antibacterial modified polyurethane material |
| CN108384428A (en) * | 2018-02-12 | 2018-08-10 | 唐山德生科技有限公司 | A kind of fast light antibacterial water color polyurethane coating and preparation method thereof |
| CN109096904A (en) * | 2018-08-21 | 2018-12-28 | 青岛科技大学 | A kind of long-lasting antibacterial polyurethane coating and preparation method thereof |
| CN109096905A (en) * | 2018-08-21 | 2018-12-28 | 青岛科技大学 | A kind of long-lasting antibacterial modified polyurethane and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115584183A (en) * | 2022-09-29 | 2023-01-10 | 百草边大生物科技(青岛)有限公司 | A macrobiological functional agent containing naringin and cepharanthine |
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