CN113717562B - Efficient antibacterial latex composition and preparation method thereof - Google Patents

Efficient antibacterial latex composition and preparation method thereof Download PDF

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Publication number
CN113717562B
CN113717562B CN202110567631.1A CN202110567631A CN113717562B CN 113717562 B CN113717562 B CN 113717562B CN 202110567631 A CN202110567631 A CN 202110567631A CN 113717562 B CN113717562 B CN 113717562B
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parts
agent
antibacterial
latex composition
forming agent
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CN113717562A (en
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李毕忠
李燕新
彭红芳
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Shaoxing Noble New Material Technology Co ltd
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Beijing Chamgo Nano Tech Co ltd
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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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
    • 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
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/24—Homopolymers or copolymers of amides or imides
    • C09D133/26—Homopolymers or copolymers of acrylamide or methacrylamide
    • 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives

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  • Life Sciences & Earth Sciences (AREA)
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  • Materials Engineering (AREA)
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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
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  • Compositions Of Macromolecular Compounds (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention relates to the field of coatings, in particular to a high-efficiency antibacterial latex composition and a preparation method thereof, wherein the preparation raw materials comprise the following components in parts by weight: 20-100 parts of modified acrylate emulsion, 1-10 parts of antibacterial agent, 30-80 parts of filler, 0.1-5 parts of thickening agent and 2-20 parts of film-forming agent. The efficient antibacterial latex composition has good antibacterial activity, mildew resistance and antiviral property, has excellent resistance to various common bacteria, fungi, molds and viruses, and has lasting antibacterial activity, mildew resistance and antiviral property.

Description

Efficient antibacterial latex composition and preparation method thereof
Technical Field
The invention relates to the field of coatings, in particular to a high-efficiency antibacterial latex composition and a preparation method thereof.
Background
With the progress of science and technology, people are more and more favored to collect multiple functions in functional products of an organic whole. Indoor temperature and humidity change range are great in the four seasons throughout the year, and some slight changes also can take place for indoor wall, breed bacterium even virus very easily, are huge hidden danger to people's health, and the wall is unable because of the particularity of its material washs and disinfects, leads to this problem to be shelved.
Aiming at the industrial pain point, the antibacterial coating is produced at the same time, has antibacterial and antiviral properties and decorative properties of the coating, and is widely applied to interior decoration.
CN111560193A discloses an antibacterial and antiviral interior wall latex paint and a preparation method thereof, wherein the latex paint has good photocatalytic capacity under the condition of indoor visible light, and the antibacterial and antiviral effects are durable, but the formula combination is not suitable for indoor wall surface sterilization of coastal cities with high humidity and high air salinity.
CN112391090A discloses an antibacterial and antiviral paint and a preparation method thereof, wherein the antibacterial and antiviral paint has good stability and antibacterial and antiviral effects, but the paint cannot inhibit the growth of mould.
CN111500140A discloses a novel antibacterial and antiviral multifunctional paint and a preparation method thereof, which has good resistance to novel bacteria and viruses, but has poor antibacterial and antiviral durability.
Disclosure of Invention
The invention provides a high-efficiency bacteriostatic latex composition, which comprises the following raw materials in parts by weight: 20-100 parts of modified acrylate emulsion, 1-10 parts of antibacterial agent, 30-80 parts of filler, 0.1-5 parts of thickening agent and 2-20 parts of film-forming agent.
In a preferred embodiment, the antimicrobial agent includes an inorganic antimicrobial agent, an organic antimicrobial agent, and a natural antimicrobial agent.
In a preferred embodiment, the inorganic antimicrobial agent includes an inorganic silver-zinc-based antimicrobial agent.
In a preferred embodiment, the organic antibacterial agent includes at least one of a quaternary amine antibacterial agent, a biguanide antibacterial agent, an alcohol antibacterial agent, and a heterocyclic antibacterial agent.
In a preferred embodiment, the antibacterial agent includes at least one of a nano-silver antibacterial agent, a silver zeolite, a silver activated carbon, a silver silica gel, a silver glass bead, a silver hydroxyapatite-based antibacterial agent, nano-zinc oxide, benzalkonium chloride, didecyldimethylammonium bromide, dimethylbenzylammonium chloride, polyhexamethylene biguanide, phenylaminol, triadimenol, cyproconazole, hexaconazole, 1-octen-3-ol, a quaternary ammonium salt, a pyridinium salt, an imidazolium salt, an isoquinolinium salt, chitosan, chitin, hinokitiol, mugwort, and aloe vera.
In a preferred embodiment, the filler is a porous filler.
In a preferred embodiment, the filler with holes is at least one selected from coal-based activated carbon, wood-based activated carbon, nutshell activated carbon, diatomaceous earth, bentonite, alumina, silica gel, carbon molecular sieve, nano silica, vermiculite and calcium silicate.
As a preferred embodiment, the film forming agent is at least one selected from a protein film forming agent, an acrylic resin film forming agent, a butadiene resin film forming agent, a polyurethane film forming agent and a nitrocellulose film forming agent.
As a preferred embodiment, the preparation raw materials further comprise, in parts by weight: 0.1-5 parts of pigment and 10-200 parts of deionized water.
The second aspect of the invention provides a preparation method of a high-efficiency bacteriostatic latex composition, which comprises the following steps:
1. preparing modified acrylate emulsion;
2. mixing the antibacterial agent, the filling material and the deionized water, and stirring at constant speed of 100-;
3. adding the modified acrylate emulsion, the pigment and the filler into the premix, and stirring at the constant speed of 1000r/min at 300-;
4. adding a thickening agent into the mixture, and stirring at constant speed of 1700-3000r/min clockwise for 1-60min to obtain a semi-finished product;
5. adding the film forming agent into the semi-finished product, and stirring at constant speed of 100-500r/min clockwise for 1-60min to obtain the finished product.
Compared with the prior art, the invention has the following beneficial effects:
1. the efficient antibacterial latex composition has good antibacterial activity, mildew resistance and antiviral property, has excellent resistance to various common bacteria, fungi, molds and viruses, and has lasting antibacterial activity, mildew resistance and antiviral property.
2. The efficient antibacterial latex composition is suitable for decoration of indoor buildings, is particularly suitable for indoor environments with high humidity and high air salinity such as coastal cities and fishing boats, and has stable property and lasting antibacterial, mildew-proof and antiviral properties.
3. The acrylate emulsion is modified by introducing a specific acrylamide monomer, so that the technical problems of water intolerance and unstable property of the acrylate emulsion in the prior art are solved, and the composition is endowed with waterproof capability in a long-term high-humidity environment, so that the stability, long-acting antibacterial activity, mildew resistance and antiviral property of the composition are maintained.
4. The nano-silver antibacterial agent and methyl-1- (benzyl) pyridinium chloride salt are mixed in a mass ratio of (1-5): 1, the compound preparation not only overcomes the technical resistance that silver ions are easily oxidized into brown silver oxide or reduced into black simple substance silver by ultraviolet catalysis although the antibacterial activity of the silver ions is good, the antibacterial activity is reduced, and the application in white or light-colored paint is limited, but also improves the antibacterial activity, the mildew resistance and the antiviral activity of the whole composition.
5. The acrylic resin film-forming agent and the polyurethane film-forming agent are mixed according to the mass ratio of (4-7): (4-11) by compounding, a compact protective film can be formed on the surface of the composition, the water resistance and salt fog resistance of the composition are further improved, and the long service life of the composition is endowed.
Detailed Description
In order to solve the technical problems, the invention provides a high-efficiency antibacterial latex composition, which is prepared from the following raw materials in parts by weight: 20-100 parts of modified acrylate emulsion, 1-10 parts of antibacterial agent, 0.1-5 parts of pigment, 30-80 parts of filler, 0.1-5 parts of thickening agent, 2-20 parts of film forming agent and 10-200 parts of deionized water.
As a preferred embodiment, the preparation method of the modified acrylate emulsion comprises the following steps:
1. weighing 1-3g of emulsifier and 45-55g of water in a flask 1, heating and dissolving, weighing 4-5g of acrylamide and 8-12g of water in a constant temperature funnel 1, weighing 20-50g of methyl methacrylate, 20-30g of butyl acrylate and 2-3g of acrylic acid in a constant temperature funnel 2, placing the constant temperature funnel 1 and the constant temperature funnel 2 at the mouth of a flask, taking down the constant temperature funnel 1 and the constant temperature funnel 2 after 20-50min, and stirring clockwise for 30-40min to obtain the pre-emulsion.
2. Weighing 15-30g of pre-emulsion in a flask 2, heating in water bath at 60-80 ℃ while stirring, and dropwise adding an initiator and water into a constant temperature funnel 3 according to the mass ratio of (6-10): 1, dripping the mixture for 2-5h, keeping the temperature for 1-3h after dripping, and adjusting the PH to 7-8 to obtain the modified acrylate emulsion.
Preferably, the emulsifier is a compound of an anionic emulsifier and a nonionic emulsifier.
Preferably, the emulsifier is sodium dodecyl sulfate and glycerol in a mass ratio of 1: (1-3) compounding.
Preferably, the initiator is potassium persulfate.
In a preferred embodiment, the antimicrobial agent includes at least one of an inorganic antimicrobial agent, an organic antimicrobial agent, and a natural antimicrobial agent.
Preferably, the inorganic antibacterial agent includes an inorganic silver-zinc antibacterial agent.
Preferably, the organic antibacterial agent includes at least one of a quaternary amine antibacterial agent, a biguanide antibacterial agent, an alcohol antibacterial agent, and a heterocyclic antibacterial agent.
Preferably, the antibacterial agent includes at least one of nano-silver antibacterial agent, silver zeolite, silver activated carbon, silver silica gel, silver glass beads, silver hydroxyapatite antibacterial agent, nano zinc oxide, benzalkonium chloride, didecyl dimethyl ammonium bromide, dimethyl benzyl ammonium chloride, polyhexamethylene biguanide, aniline alcohol, triadimenol, cyproconazole, hexaconazole, 1-octen-3-ol, quaternary ammonium salt, pyridinium salt, imidazolium salt, isoquinolinium salt, chitosan, chitin, hinokitiol, mugwort, and aloe.
Preferably, the antibacterial agent comprises nano silver antibacterial agent and quaternary ammonium salt.
Preferably, the quaternary ammonium salt is methyl-1- (phenylmethyl) pyridinium chloride.
Preferably, the antibacterial agent is a nano-silver antibacterial agent, and methyl-1- (benzyl) pyridinium chloride salt is prepared by mixing the following components in a mass ratio of (1-5): 1, compounding.
The pigment of the present invention is not particularly limited, and any pigment capable of adding a color to a paint may be used, and the pigment may be selected from titanium-based pigments, iron-based pigments, chromium-based pigments, lead-based pigments, zinc-based pigments, metallic pigments, and organic synthetic pigments.
In a preferred embodiment, the filler is a perforated filler.
Preferably, the filling material with holes is at least one selected from coal activated carbon, wood activated carbon, shell activated carbon, diatomite, bentonite, alumina, silica gel, carbon molecular sieve, nano silicon dioxide, vermiculite and calcium silicate.
Preferably, the porous filler is selected from nano-silica.
Preferably, the particle size of the nano silicon dioxide is 15-100 nm.
The thickening agent is not specially limited, and any thickening agent capable of improving the viscosity of the composition can be selected from inorganic salt thickening agents, fatty alcohol, fatty acid thickening agents, alkanolamide thickening agents, amine oxide thickening agents, cellulose thickening agents, polyacrylic acid thickening agents, polyurethane thickening agents, natural gum thickening agents and polyoxyethylene thickening agents.
As a preferred embodiment, the film forming agent is at least one selected from a protein film forming agent, an acrylic resin film forming agent, a butadiene resin film forming agent, a polyurethane film forming agent and a nitrocellulose film forming agent.
Preferably, the film forming agent is selected from an acrylic resin film forming agent and a polyurethane film forming agent in a mass ratio of (2-9): (1-12) compounding.
Preferably, the film forming agent is selected from an acrylic resin film forming agent and a polyurethane film forming agent in a mass ratio of (4-7): (4-11) compounding.
Silver ions in the traditional silver-based antibacterial agent are easy to lose electrons to form black silver oxide particles, or are catalyzed into black simple substance silver by ultraviolet rays, so that the antibacterial performance of the traditional silver-based antibacterial agent is reduced, and the application of the traditional silver-based antibacterial agent in white or light-colored coatings is limited. The applicant finds that a protective film is formed on the surface of the coating to isolate water vapor and oxygen, so that the composite antibacterial agent in the coating can be protected, the service performance and the service life are improved, the traditional acrylic film-forming agent has strong toughness and poor hydrophobicity, and when the applicant makes the mass ratio of the acrylic resin film-forming agent to the polyurethane film-forming agent (4-7): (4-11) when the water-based oil-resistant and salt mist-resistant paint is added into a system in a compounding way, the hydrophobicity of the film-forming agent is improved, the surface toughness and the mechanical strength of the film-forming agent are enhanced, the water-resistant, oil-resistant and salt mist-resistant performances of the paint are endowed, and the damage of external force to the paint can be resisted.
The second aspect of the invention provides a preparation method of a high-efficiency bacteriostatic latex composition, which comprises the following steps:
1. preparing modified acrylate emulsion;
2. mixing the antibacterial agent, the filling material and the deionized water, and stirring at constant speed of 100-;
3. adding the modified acrylate emulsion, the pigment and the filler into the premix, and stirring at the constant speed of 1000r/min at 300-;
4. adding a thickening agent into the mixture, and stirring at constant speed of 1700-3000r/min clockwise for 1-60min to obtain a semi-finished product;
5. adding the film forming agent into the semi-finished product, and stirring at constant speed of 100-500r/min clockwise for 1-60min to obtain the finished product.
The present invention will be specifically described below by way of examples. It is to be noted that the following examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, as many insubstantial modifications and variations of the invention described above will now occur to those skilled in the art.
Titanium white was purchased from Guangzhou city Si Tuyuan chemical Co Ltd
Acrylamide CAS # 79-06-1
Methyl methacrylate CAS # 80-62-6
Butyl acrylate CAS # 141-32-2
Acrylic acid CAS # 79-10-7
2386-53-0 CAS # of sodium dodecyl sulfate
7727-21-1 CAS # potassium persulfate
The nano silver antibacterial agent is purchased from Beijing Chonggao nano technology Co., Ltd
Methyl-1- (phenylmethyl) pyridinium chloride CAS #:26747-91-1
The nanometer silicon dioxide is purchased from a micro-nano chemical plant of Changtai of shouguang city, Shandong province
Acrylic resin film former was purchased from siliconization chemical Limited, Guangzhou
Polyurethane film formers were purchased from Xinhui Chemicals, Inc., Zhongshan
Acrylic ester emulsion purchased from Qingdao Zongnengda architecture science Co Ltd
Pure acrylic emulsion purchased from Nantong Biochemical Co Ltd
Kaolin is purchased from mineral processing plant of Hengda mineral in Ling shou county
Nitrocellulose film former was purchased from research institute of photoanalysis chemical technology in Beijing middle school
In addition, the starting materials used are all commercially available, unless otherwise specified.
Examples
Example 1
The first aspect of example 1 provides a high-efficiency bacteriostatic latex composition, which is prepared from the following raw materials in parts by weight: 20 parts of modified acrylate emulsion, 1 part of antibacterial agent, 0.1 part of titanium white, 30 parts of filler, 0.1 part of sodium phosphate, 2 parts of film-forming agent and 10 parts of deionized water.
The preparation method of the modified acrylate emulsion comprises the following steps:
1. Weighing 1g of emulsifier and 45g of water in a flask 1, heating and dissolving, weighing 4g of acrylamide and 8g of water in a constant-temperature funnel 1, weighing 20g of methyl methacrylate, 20g of butyl acrylate and 2g of acrylic acid in a constant-temperature funnel 2, placing the constant-temperature funnel 1 and the constant-temperature funnel 2 at the mouth of a flask, taking down the constant-temperature funnel 1 and the constant-temperature funnel 2 after 20min, and stirring clockwise for 30min to obtain the pre-emulsion.
2. Weighing 15g of pre-emulsion in a flask 2, heating in a water bath at 60 ℃, continuously stirring, and adding an initiator and water into a constant-temperature funnel 3 in a mass ratio of 10: 1, dropwise adding the mixture for 2h, keeping the temperature for 1h after dropwise adding is finished, and adjusting the pH value to 7 to obtain the modified acrylate emulsion.
The emulsifier is sodium dodecyl sulfate and glycerol, and the mass ratio of the sodium dodecyl sulfate to the glycerol is 1: 1, compounding.
The initiator is potassium persulfate.
The antibacterial agent is a nano-silver antibacterial agent, methyl-1- (benzyl) pyridinium chloride salt, and the mass ratio of the methyl-1- (benzyl) pyridinium chloride salt is 1: 1, compounding.
The filler is selected from nano silicon dioxide, and the particle size is 15 nm.
The film forming agent is selected from an acrylic resin film forming agent and a polyurethane film forming agent according to a mass ratio of 4: 5, compounding.
The second aspect of example 1 provides a method for preparing a high-potency bacteriostatic latex composition, comprising the following steps:
1. Preparing modified acrylate emulsion;
2. mixing the antibacterial agent, the filler and deionized water, and stirring at 100r/min clockwise at constant speed for 5min to obtain premix;
3. adding the modified acrylate emulsion, the pigment and the filler into the premix, and stirring at a constant speed of 300r/min clockwise for 5min to obtain a mixture;
4. adding a thickening agent into the mixture, and stirring at a constant speed of 1700r/min clockwise for 5min to obtain a semi-finished product;
5. adding the film forming agent into the semi-finished product, and stirring at constant speed of 100r/min clockwise for 1min to obtain the finished product.
Example 2
The first aspect of example 2 provides a high-efficiency bacteriostatic latex composition, which is prepared from the following raw materials in parts by weight: 100 parts of modified acrylate emulsion, 10 parts of antibacterial agent, 5 parts of titanium white, 80 parts of filler, 5 parts of sodium phosphate, 20 parts of film-forming agent and 200 parts of deionized water.
The preparation method of the modified acrylate emulsion comprises the following steps:
1. weighing 3g of emulsifier and 55g of water in a flask 1, heating and dissolving, weighing 5g of acrylamide and 12g of water in a constant-temperature funnel 1, weighing 50g of methyl methacrylate, 30g of butyl acrylate and 3g of acrylic acid in a constant-temperature funnel 2, placing the constant-temperature funnel 1 and the constant-temperature funnel 2 at the mouth of a flask, taking down the constant-temperature funnel 1 and the constant-temperature funnel 2 after 50min, and stirring clockwise for 40min to obtain the pre-emulsion.
2. 30g of pre-emulsion is weighed in a flask 2, heated in a water bath at 80 ℃ and continuously stirred, and the mass ratio of the initiator to the water dropped in a constant-temperature funnel 3 is 6: 1, dropwise adding the mixture for 5h, keeping the temperature for 3h after dropwise adding, and adjusting the pH value to 8 to obtain the modified acrylate emulsion.
The emulsifier is sodium dodecyl sulfate and glycerol which are mixed according to the mass ratio of 1: 3, compounding.
The initiator is potassium persulfate.
The antibacterial agent is a nano-silver antibacterial agent, methyl-1- (benzyl) pyridinium chloride salt, and the mass ratio of the antibacterial agent to the methyl-1- (benzyl) pyridinium chloride salt is 5: 1, compounding.
The filler is selected from nano silicon dioxide, and the particle size is 100 nm.
The film forming agent is selected from an acrylic resin film forming agent and a polyurethane film forming agent according to the mass ratio of 7: 11 and (4) compounding.
The second aspect of example 2 provides a preparation method of a high-potency bacteriostatic latex composition, comprising the following steps:
1. preparing modified acrylate emulsion;
2. mixing the antibacterial agent, the filling material and the deionized water, and stirring at a constant speed of 500r/min clockwise for 10min to obtain a premix;
3. adding the modified acrylate emulsion, the pigment and the filler into the premix, and stirring at a constant speed of 1000r/min clockwise for 10min to obtain a mixture;
4. adding a thickening agent into the mixture, and stirring at a constant speed of 3000r/min clockwise for 10min to obtain a semi-finished product;
5. Adding the film forming agent into the semi-finished product, and stirring at a constant speed of 500r/min clockwise for 10min to obtain the finished product.
Example 3
The first aspect of example 3 provides a high-efficiency bacteriostatic latex composition, which is prepared from the following raw materials in parts by weight: 60 parts of modified acrylate emulsion, 4 parts of antibacterial agent, 3 parts of titanium white, 50 parts of filler, 3 parts of sodium phosphate, 8 parts of film-forming agent and 120 parts of deionized water.
The preparation method of the modified acrylate emulsion comprises the following steps:
1. weighing 2g of emulsifier and 50g of water in a flask 1, heating and dissolving, weighing 4.5g of acrylamide and 10g of water in a constant-temperature funnel 1, weighing 30g of methyl methacrylate, 25g of butyl acrylate and 2.5g of acrylic acid in a constant-temperature funnel 2, placing the constant-temperature funnel 1 and the constant-temperature funnel 2 in a flask opening, taking down the constant-temperature funnel 1 and the constant-temperature funnel 2 after 35min, and stirring clockwise for 35min to prepare the pre-emulsion.
2. Weighing 25g of pre-emulsion in a flask 2, heating in a water bath at 70 ℃ while stirring, and adding an initiator into a constant temperature funnel 3 in a mass ratio of 8: and (3) dropwise adding the mixture for 4h, keeping the temperature for 2h after dropwise adding, and adjusting the pH to 7 to obtain the modified acrylate emulsion.
The emulsifier is sodium dodecyl sulfate and glycerol, and the mass ratio of the sodium dodecyl sulfate to the glycerol is 1: 2, compounding.
The initiator is potassium persulfate.
The antibacterial agent is a nano-silver antibacterial agent, methyl-1- (benzyl) pyridinium chloride salt, and the mass ratio of the antibacterial agent to the methyl-1- (benzyl) pyridinium chloride salt is 3: 1, compounding.
The filler is selected from nano silicon dioxide, and the particle size is 20 nm.
The film forming agent is selected from an acrylic resin film forming agent and a polyurethane film forming agent according to the mass ratio of 5: 7, compounding.
The second aspect of example 3 provides a method for preparing a high potency bacteriostatic latex composition, comprising the steps of:
1. preparing modified acrylate emulsion;
2. mixing the antibacterial agent, the filling material and the deionized water, and stirring at a constant speed of 300r/min clockwise for 6min to obtain a premix;
3. adding the modified acrylate emulsion, the pigment and the filler into the premix, and stirring at a constant speed of 800r/min clockwise for 4min to obtain a mixture;
4. adding a thickening agent into the mixture, and stirring at a constant speed of 2300r/min clockwise for 6min to obtain a semi-finished product;
5. adding film forming agent into the semi-finished product, and stirring at 200r/min clockwise for 5min to obtain the final product.
Comparative example 1
The first aspect of comparative example 1 provides a high performance bacteriostatic latex composition, which is similar to example 3, except that the modified acrylate emulsion is replaced by the acrylate emulsion.
The first aspect of the comparative example 1 provides a preparation method of the high-efficiency bacteriostatic latex composition, and the specific implementation mode is the same as that of example 3.
Comparative example 2
The first aspect of comparative example 2 provides a high performance bacteriostatic latex composition, which is similar to example 3, except that acrylic emulsion is used instead of modified acrylic emulsion.
The first aspect of the comparative example 2 provides a preparation method of the high-efficiency bacteriostatic latex composition, and the specific implementation mode is the same as that of the example 3.
Comparative example 3
A first aspect of comparative example 3 provides a highly bacteriostatic latex composition, which is similar to example 3, except that the antibacterial agent is a nano-silver antibacterial agent, methyl-1- (benzyl) pyridinium chloride salt in a mass ratio of 1: 2, compounding.
The first aspect of the comparative example 3 provides a preparation method of the high-efficiency bacteriostatic latex composition, and the specific implementation mode is the same as that of the example 3.
Comparative example 4
The first aspect of comparative example 4 provides a highly bacteriostatic latex composition, which is similar to example 3, except that the antibacterial agent is a nano-silver antibacterial agent.
The first aspect of comparative example 4 provides a method for preparing a high-efficiency bacteriostatic latex composition, which is implemented in the same manner as in example 3.
Comparative example 5
The first aspect of comparative example 5 provides a highly effective bacteriostatic latex composition, which is similar to example 3, except that kaolin is used instead of nano-silica.
The first aspect of the comparative example 5 provides a preparation method of the high-efficiency bacteriostatic latex composition, and the specific implementation mode is the same as that of the example 3.
Comparative example 6
The first aspect of comparative example 6 provides a highly effective bacteriostatic latex composition, which is similar to example 3, except that the filler is selected from nano-silica and has a particle size of 120 nm.
The first aspect of the comparative example 6 provides a preparation method of the high-efficiency bacteriostatic latex composition, and the specific implementation mode is the same as that of the example 3.
Comparative example 7
The first aspect of comparative example 7 provides a bacteriostatic latex composition with high potency, which is the same as example 3, except that the film former is selected from acrylic resin film formers.
The first aspect of comparative example 7 provides a method for preparing a high-efficiency bacteriostatic latex composition, and the specific implementation mode is the same as that of example 3.
Comparative example 8
The first aspect of the comparative example 8 provides a high-efficiency bacteriostatic latex composition, which is the same as that in example 3 except that the film forming agent is selected from an acrylic resin film forming agent and a polyurethane film forming agent in a mass ratio of 1: 1, compounding.
The first aspect of the comparative example 8 provides a preparation method of the high-efficiency bacteriostatic latex composition, and the specific implementation mode is the same as that of the example 3.
Comparative example 9
The first aspect of comparative example 9 provides a high bacteriostatic latex composition, which is the same as example 3 except that the film-forming agent is a nitrocellulose film-forming agent.
The first aspect of comparative example 9 provides a method for preparing a high-efficiency bacteriostatic latex composition, which is implemented in the same manner as in example 3.
Performance testing
The examples and comparative examples were subjected to performance tests, and the results are as follows.
Reference for mould test standard: GB/T1741-2007, the strains are Aspergillus niger and Aspergillus flavus, and the strains come from the national level strain collection center.
The mould test rating criteria were:
level 0: no obvious mildew growth occurs under the magnification of 50 times;
level 1: mildew cannot be seen or is difficult to see by the naked eyes, but can be obviously seen under a magnifying glass;
and 2, stage: the mold growth can be seen by naked eyes, and the coverage area on the surface of the sample is 10-30%;
and 3, level: the mold growth can be seen by naked eyes, and the coverage area on the surface of the sample is 30-60%;
4, level: mildew can be seen by naked eyes, and the coverage area on the surface of the sample is more than 60%;
And (3) reference of antibacterial property and antibacterial durability test standards: GB/T21866-2008, the strains used are staphylococcus aureus and Escherichia coli, and the strains come from the national level strain collection center.
The rating standards of antibacterial property and antibacterial durability are as follows:
stage I: the antibacterial property is more than or equal to 99 percent, and the antibacterial durability is more than or equal to 95 percent.
And II, stage: the antibacterial property is more than or equal to 90 percent, and the antibacterial durability is more than or equal to 85 percent.
Standard reference for antiviral testing: ISO21702, the strain used is H3N2, and the strain is from national class culture Collection.
Figure BDA0003081474180000111
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content of the above disclosure into equivalent embodiments with equivalent changes, but all those simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the present invention.

Claims (5)

1. The efficient antibacterial latex composition is characterized by comprising the following raw materials in parts by weight: 20-100 parts of modified acrylate emulsion, 1-10 parts of antibacterial agent, 30-80 parts of filler, 0.1-5 parts of thickening agent and 2-20 parts of film-forming agent; the antibacterial agent is a nano-silver antibacterial agent and methyl-1- (benzyl) pyridinium chloride salt, and the mass ratio of the antibacterial agent to the methyl-1- (benzyl) pyridinium chloride salt is (1-5): 1, compounding; the film forming agent is an acrylic resin film forming agent and a polyurethane film forming agent in a mass ratio of (4-7): (4-11) compounding; the modified acrylate emulsion is acrylamide modified acrylate emulsion.
2. The latex composition as claimed in claim 1, wherein the filler is a porous filler.
3. The efficient bacteriostatic latex composition according to claim 2, wherein the porous filler is at least one selected from coal-based activated carbon, wood-based activated carbon, fruit shell activated carbon, diatomite, bentonite, alumina, silica gel, carbon molecular sieve, nano-silica, vermiculite and calcium silicate.
4. The efficient bacteriostatic latex composition according to claim 1, wherein the raw materials for preparation further comprise, by weight: 0.1-5 parts of pigment and 10-200 parts of deionized water.
5. The preparation method of the high-efficiency bacteriostatic latex composition according to claim 4, which is characterized by comprising the following steps of:
preparing modified acrylate emulsion;
mixing the antibacterial agent, the filling material and the deionized water, and stirring at constant speed of 100-;
adding the modified acrylate emulsion, the pigment and the filler into the premix, and stirring at the constant speed of 1000r/min at 300-;
adding a thickening agent into the mixture, and stirring at constant speed of 1700-3000r/min clockwise for 1-60min to obtain a semi-finished product;
Adding the film forming agent into the semi-finished product, and stirring at constant speed of 100-500r/min clockwise for 1-60min to obtain the finished product.
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