CN112980252A - Erasable water-based long-acting antibacterial film coating agent and preparation method thereof - Google Patents
Erasable water-based long-acting antibacterial film coating agent and preparation method thereof Download PDFInfo
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- CN112980252A CN112980252A CN202110357892.0A CN202110357892A CN112980252A CN 112980252 A CN112980252 A CN 112980252A CN 202110357892 A CN202110357892 A CN 202110357892A CN 112980252 A CN112980252 A CN 112980252A
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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
- C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
- C09D101/08—Cellulose derivatives
- C09D101/26—Cellulose ethers
- C09D101/28—Alkyl ethers
- C09D101/284—Alkyl ethers with hydroxylated hydrocarbon radicals
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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
- C09D129/00—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 an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/02—Homopolymers or copolymers of unsaturated alcohols
- C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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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
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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
- 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
Abstract
The invention relates to the technical field of film coating agents, in particular to an erasable water-based long-acting antibacterial film coating agent and a preparation method thereof; the preparation raw materials at least comprise the following components in parts by weight: 0.0002 to 10 parts of disinfection factor, 0.05 to 5 parts of film forming agent, 0.02 to 10 parts of dispersant, 2 to 30 parts of cosolvent and 50 to 90 parts of water; the coating formed by the erasable water-based long-acting antibacterial coating agent can slowly release the antibacterial agent and has long-acting antibacterial activity; the coating formed by the coating agent has strong mechanical strength and flexibility and is not easy to crack; and the coating agent is water-based, so that the coating agent is convenient to erase.
Description
Technical Field
The invention relates to the technical field of film coating agents, and in particular relates to an erasable water-based long-acting antibacterial film coating agent and a preparation method thereof.
Background
Pathogenic microorganisms are easy to breed when a kitchen, a toilet, an automobile, an air conditioner filter screen and the like are affected with damp, and meanwhile, peculiar smell is easy to emit, so that human body discomfort is caused, and the environment attractiveness is affected. Polysaccharides such as starch and cellulose are macromolecular renewable substances widely existing in the nature, and have wide application prospects in many fields due to rich sources, environmental friendliness and good biological safety.
In order to endow starch and cellulose with certain antibacterial performance, researchers introduce inorganic nanoparticles such as silver, copper, titanium dioxide, cuprous oxide and the like into a starch or cellulose material substrate by a certain physical or chemical method to endow the starch or cellulose material substrate with an antibacterial function; researchers also mix cellulose with chitosan and organic compound antibacterial agents such as quaternary ammonium salt, quaternary phosphonium salt antibacterial agent, halogen amine and the like to prepare the composite material with the antibacterial function; researchers also directly derivatize starch or cellulose to prepare cellulose derivatives with bacteriostatic function. However, the starch or cellulose bacteriostatic functional material prepared by the method has certain safety due to the used bacteriostatic agent, and the prepared bacteriostatic material cannot be applied to kitchens and living environments; and the common disinfectant has short action time and no long-acting property.
Therefore, the development of an erasable water-based long-acting antibacterial film coating agent technology becomes the key point of research of technicians in the field, and can make up for the corresponding market blank and improve the quality of life.
Disclosure of Invention
In order to solve the technical problems, the first aspect of the invention provides an erasable aqueous long-acting bacteriostatic coating agent, which is prepared from at least the following raw materials in parts by weight: 0.0002 to 10 parts of disinfection factor, 0.05 to 5 parts of film forming agent, 0.02 to 10 parts of dispersant, 2 to 30 parts of cosolvent and 50 to 90 parts of water.
In a preferred embodiment of the present invention, the disinfection factor is one or more selected from polyquaternium, double-chain quaternary ammonium salt, single-chain quaternary ammonium salt, and polyhexamethylene guanidine compound.
As a preferred technical solution of the present invention, the film forming agent is selected from one or more of hydroxypropyl methylcellulose, sodium carboxymethyl cellulose, polyvinyl alcohol, and polyvinylpyrrolidone.
In a preferred embodiment of the present invention, the dispersant is a nonionic surfactant.
As a preferable technical scheme of the invention, the nonionic surfactant is selected from one or more of long-chain fatty alcohol-polyoxyethylene ether, fatty acid-polyoxyethylene ester, polyoxyethylene alkylamine, alkylolamide and alkyl glucoside.
In a preferred embodiment of the present invention, the nonionic surfactant is alkylolamide.
As a preferable technical scheme of the invention, the cosolvent is a small molecular alcohol.
In a preferred embodiment of the present invention, the small molecular alcohol is selected from one or more of ethanol, isopropanol, n-propanol, propylene glycol, glycerol, ethylene glycol, n-butanol, and low molecular weight polyvinyl alcohol.
As a preferable technical scheme, the mass ratio of the film-forming agent to the cosolvent is 1: (0.4-10).
In a second aspect, the present invention provides a method of preparing an erasable aqueous long-acting bacteriostatic coating agent, the method at least comprising the steps of:
adding water, a disinfection factor, a film forming agent, a dispersing agent and a cosolvent into a reactor in proportion, and uniformly stirring; and (5) obtaining the product.
Compared with the prior art, the invention has the beneficial effects that:
1) the coating formed by the erasable water-based long-acting antibacterial coating agent can slowly release the antibacterial agent and has long-acting antibacterial activity;
2) the coating formed by the erasable water-based long-acting antibacterial coating agent provided by the invention has strong mechanical strength and flexibility and is not easy to crack;
3) the erasable water-based long-acting antibacterial film coating agent provided by the invention is water-based and is convenient to erase.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.
In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.
In order to solve the technical problems, the first aspect of the invention provides an erasable water-based long-acting antibacterial film coating agent, which at least comprises, by weight, 0.0002-10 parts of a disinfection factor, 0.05-5 parts of a film forming agent, 0.02-10 parts of a dispersing agent, 2-30 parts of a cosolvent and 50-90 parts of water.
In a more preferable embodiment, the erasable aqueous long-acting bacteriostatic coating agent at least comprises 3-8 parts of disinfection factor, 0.5-4 parts of film-forming agent, 1-6 parts of dispersing agent, 5-25 parts of cosolvent and 60-85 parts of water in parts by weight.
In a most preferred embodiment, the erasable aqueous long-acting bacteriostatic coating agent provided by the invention is prepared from at least 4.5 parts of disinfection factor, 2.3 parts of film-forming agent, 4 parts of dispersing agent, 15 parts of cosolvent and 80 parts of water in parts by weight.
Disinfection factor
The disinfection factor is a substance with disinfection, sterilization and bacteriostasis functions.
In a preferred embodiment, the disinfection factor is selected from one or more of polyquaternium, double-chain quaternary ammonium salt, single-chain quaternary ammonium salt, polyhexamethylene guanidine compound.
In a preferred embodiment, the polyquaternium according to the invention is selected from one or more of polyquaternium 1, polyquaternium 126, polyquaternium 15.
In a preferred embodiment, the double-chain quaternary ammonium salt of the present invention is selected from one or more of dioctyldimethylammonium chloride, didecyldimethylammonium chloride, dioctyldimethylammonium chloride, didodecyldimethylammonium bromide, and octyldecyldimethylammonium bromide.
In a preferred embodiment, the single-chain quaternary ammonium salt according to the present invention is selected from one or more of dodecyl dimethyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, dodecyl dimethyl phenoxy ethyl ammonium bromide, tetradecyl dimethyl benzyl ammonium chloride, dodecyl trimethyl ammonium chloride, dodecyl trimethoxy ammonium, trimethyl tetradecyl ammonium.
In a preferred embodiment, the disinfection factor of the present invention is polyquaternium 1.
The polyquaternium belongs to a strong cationic high molecular polymer, has good solubility in water, is a non-oxidative bactericide, and has broad-spectrum and high-efficiency bactericidal capability; meanwhile, the oil-removing deodorant has certain oil-removing and deodorizing capabilities; has special effect on killing escherichia coli; the polyquaternium has no obvious irritation to skin, and can be washed with water when contacting with skin; but not with anionic surfactants.
The invention adopts polyquaternium as a disinfection factor, especially adopts polyquaternium 1, has stronger adsorption effect, can decompose a peptide chain in protein into a plurality of sections, thereby inhibiting the activity of bacteria, and is possibly related to the polyquaternium 1 containing a linking group which links a plurality of ion heads through chemical bonds to cause the tight combination of a plurality of quaternary ammonium salt monomer ions, thereby weakening the repulsion effect among the ions, also strengthening the charge density on polymer nitrogen positive ions, leading the polyquaternium to be easier to permeate thalli into cells from cell walls to damage the thalli, achieving the sterilization effect, leading the hydrophilic group on the quaternary ammonium salt molecule to act on the protein layer of the thalli, and leading the protein to denaturalization and inactivation; particularly, it has excellent antibacterial effect against Staphylococcus, Streptococcus (including Streptococcus faecalis, Streptococcus pneumoniae, Streptococcus pyogenes, etc.), Clostridium, Corynebacterium diphtheriae, Bacillus anthracis, Neisseria, Brucella, Legionella, helicobacter, Mycoplasma, Rickettsia, Chlamydia, etc.
Film forming agent
The film forming agent refers to a high molecular compound capable of forming a continuous film.
In a preferred embodiment, the film forming agent of the present invention is selected from one or more of hydroxypropyl methylcellulose, sodium carboxymethyl cellulose, polyvinyl alcohol, and polyvinyl pyrrolidone.
In a preferred embodiment, the film forming agent of the present invention is hydroxypropyl methylcellulose.
In a preferred embodiment, the hydroxypropylmethylcellulose of the present invention has a viscosity of 10 to 100 mPa-s.
In a most preferred embodiment, the hydroxypropylmethylcellulose of the present invention has a viscosity of 50 mPa-s.
Hydroxypropyl methylcellulose according to the present invention is commercially available from manufacturers including, but not limited to, Shandong Weifang Strength composite, Inc.
The hydroxypropyl methyl cellulose is a cellulose variety with rapidly increased yield and dosage in recent years, and is nonionic cellulose mixed ether prepared by alkalizing purified cotton, using epoxypropane and chloromethane as etherifying agents and carrying out a series of reactions, wherein the properties of the nonionic cellulose mixed ether are different due to different ratios of methoxyl content to hydroxypropyl content.
In order to improve the water retention performance of the erasable long-acting antibacterial film coating agent, the invention takes the natural cellulose as the raw material into priority, and especially when the viscosity of the hydroxypropyl methyl cellulose is 10-100mPa & s, the film coating agent has excellent film forming property while improving the water retention performance; the viscosity of the coating agent is too low to form a film easily, and the viscosity of the coating agent is too high, so that the coating agent is not beneficial to spraying and use, is easy to precipitate, and influences the storage stability of the coating agent;
in experiments, the inventor unexpectedly discovers that when hydroxypropyl methyl cellulose is added into a system and compounded with polyquaternium, the bacteriostatic long-acting property of the film coating agent can be effectively improved, particularly the film coating agent covers the surface of mould, and the mould disappears after two weeks; the reason for the existence is that the hydroxypropyl methyl cellulose adopted by the invention is in an amorphous structure, the interaction between molecules can generate a compact net structure, and the molecules of the polyquaternium have polyhydroxy structures and can be combined with hydroxypropyl methyl cellulose molecules through the actions of hydrogen bonds, molecular dipoles and the like, so that the disinfection factors are loaded on the surface of a film layer, the slow release effect is realized, the mould coated by the film coating agent is efficiently removed, and the infection of external bacteria is reduced; however, the film formed by the hydroxypropyl methyl cellulose adopted by the invention has poor mechanical strength and flexibility, and the application range of the film coating agent is greatly influenced.
Dispersing agent
The dispersant of the invention is a surfactant which has two opposite properties of lipophilicity and hydrophilcity in a molecule, can uniformly disperse inorganic and organic dyes which are difficult to dissolve in liquid and liquid particles, and can prevent the particles from precipitating and coagulating to form an amphiphilic agent required by stable suspension; is an amphiphilic chemical, and can increase the compatibility of oily and aqueous components in the same system.
In a preferred embodiment, the dispersant of the present invention is a nonionic surfactant.
In a preferred embodiment, the nonionic surfactant of the present invention is selected from one or more of long-chain fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, polyoxyethylene alkylamine, alkylolamide and alkyl glycoside.
In a preferred embodiment, the nonionic surfactant of the present invention is an alkylolamide.
In a preferred embodiment, the carbon chain length of the alkylolamides of the present invention is from C10 to C16.
In a most preferred embodiment, the alkylolamides of the present invention are lauric acid diethanolamides.
In order to improve the wettability of the film coating agent on the surface of an acting object and further improve the removal rate of the film coating agent on mould, the surface active agent is added for reducing the surface tension of an attachment, expanding the leveling property of the film coating agent on the surface of the attachment and forming a film layer structure with uniform and stable thickness; in view of containing polyquaternium in the system, in order to avoid inactivation and precipitation, the invention preferably selects nonionic surfactants, especially long-chain fatty alcohol-polyoxyethylene ether, alkylolamide and the like; the inventor unexpectedly discovers in experiments that the technical problems of poor mechanical property and poor toughness of a film forming agent for forming a film layer can be solved by controlling the type of the nonionic surfactant and the carbon chain length of the surfactant, probably because the nonionic surfactant selected by the invention contains amino, the nonionic surfactant is easy to form hydrogen bonds with polar groups in the film layer, and the nonpolar long carbon chain is easy to wind with a network structure of the film layer, the effect of flexibility of the film layer is given to a certain extent, the film layer is not easy to break after being dried, the external influence can be blocked, and the mould removing efficiency is improved; the longer the carbon chain is, the better the flexibility of the film layer is, but if the carbon chain is longer, the higher the lipophilicity is, and the poorer the dispersibility of the film coating agent system is; through multiple experimental analysis, the two effects are best when the carbon chain length is C10-C16.
Cosolvent
The cosolvent in the invention refers to a substance for increasing the solubility of the substance in a system.
In a preferred embodiment, the co-solvent of the present invention is a small molecule alcohol.
In a preferred embodiment, the small molecule alcohol of the present invention is selected from one or more of ethanol, isopropanol, n-propanol, propylene glycol, glycerol, ethylene glycol, n-butanol, and low molecular weight polyvinyl alcohol.
In a most preferred embodiment, the small molecule alcohol of the present invention is glycerol.
The glycerol, also known as glycerin, has a chemical formula of C3H8O3The product is colorless, odorless, sweet, clear, sticky and liquid in appearance, is an organic matter, and can absorb moisture from the air and also absorb hydrogen sulfide, hydrogen cyanide and sulfur dioxide; insoluble in benzene, chloroform, carbon tetrachloride, carbon disulfide, petroleum ether and oils, and is a skeletal component of triglyceride molecules.
According to the invention, the water-retaining property of the film coating agent can be effectively improved by adding glycerol, but the content of the glycerol cannot be too much, and if too much glycerol is added, the solubility of the hydroxypropyl methyl cellulose can be reduced; through experimental analysis, the mass ratio of the film forming agent to the cosolvent is 1: (0.4-10), the effect is best.
In a second aspect, the present invention provides a method of preparing an erasable aqueous long-acting bacteriostatic coating agent, the method at least comprising the steps of:
adding water, a disinfection factor, a film forming agent, a dispersing agent and a cosolvent into a reactor in proportion, and uniformly stirring; and (5) obtaining the product.
When in use, the mixture provided by the invention is sprayed and coated on the surfaces of walls and objects such as indoor toilets, kitchens, vehicles and the like, and after the coating film loses efficacy for a long time, a wet towel can be used for wiping the coating film to conveniently remove the water-based antibacterial coating film, so that the water-based antibacterial coating film can be conveniently coated again.
It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the raw materials used are commercially available from national chemical reagents, unless otherwise specified.
Examples
Example 1
The erasable water-based long-acting antibacterial film coating agent is prepared from 4.5 parts of disinfection factor, 2.3 parts of film forming agent, 4 parts of dispersing agent, 15 parts of cosolvent and 80 parts of water in parts by weight.
The disinfection factor is polyquaternium 1.
The film forming agent is hydroxypropyl methyl cellulose.
The viscosity of the hydroxypropylmethylcellulose was 50mPa · s.
The hydroxypropyl methylcellulose is commercially available from a manufacturer's package, Shandong Weifang Strength composite, Inc.
The dispersant is a nonionic surfactant.
The nonionic surfactant is an alkylolamide.
The alkylolamide is lauric acid diethanolamide.
The cosolvent is a small molecular alcohol.
The micromolecular alcohol is glycerol.
A method of preparing an erasable aqueous long acting bacteriostatic film coating, the method comprising the steps of: adding water, a disinfection factor, a film forming agent, a dispersing agent and a cosolvent into a reactor in proportion, and uniformly stirring; and (5) obtaining the product.
Example 2
The erasable water-based long-acting antibacterial film coating agent is prepared from 0.0002 part of disinfection factor, 0.05 part of film forming agent, 0.02 part of dispersing agent, 2 parts of cosolvent and 50 parts of water in parts by weight.
The disinfection factor is polyquaternium 1.
The film forming agent is hydroxypropyl methyl cellulose.
The viscosity of the hydroxypropylmethylcellulose was 50mPa · s.
The hydroxypropyl methylcellulose is commercially available from a manufacturer's package, Shandong Weifang Strength composite, Inc.
The dispersant is a nonionic surfactant.
The nonionic surfactant is an alkylolamide.
The alkylolamide is lauric acid diethanolamide.
The cosolvent is a small molecular alcohol.
The micromolecular alcohol is glycerol.
A method of preparing an erasable aqueous long acting bacteriostatic film coating, the method comprising the steps of: adding water, a disinfection factor, a film forming agent, a dispersing agent and a cosolvent into a reactor in proportion, and uniformly stirring; and (5) obtaining the product.
Example 3
The erasable water-based long-acting antibacterial film coating agent is prepared from the following raw materials, by weight, 10 parts of a disinfection factor, 5 parts of a film forming agent, 10 parts of a dispersing agent, 30 parts of a cosolvent and 90 parts of water.
The disinfection factor is polyquaternium 1.
The film forming agent is hydroxypropyl methyl cellulose.
The viscosity of the hydroxypropylmethylcellulose was 50mPa · s.
The hydroxypropyl methylcellulose is commercially available from a manufacturer's package, Shandong Weifang Strength composite, Inc.
The dispersant is a nonionic surfactant.
The nonionic surfactant is an alkylolamide.
The alkylolamide is lauric acid diethanolamide.
The cosolvent is a small molecular alcohol.
The micromolecular alcohol is glycerol.
A method of preparing an erasable aqueous long acting bacteriostatic film coating, the method comprising the steps of: adding water, a disinfection factor, a film forming agent, a dispersing agent and a cosolvent into a reactor in proportion, and uniformly stirring; and (5) obtaining the product.
Example 4
The erasable water-based long-acting antibacterial film coating agent is prepared from 4.5 parts of disinfection factor, 2.3 parts of film forming agent, 4 parts of dispersing agent, 15 parts of cosolvent and 80 parts of water in parts by weight.
The disinfection factor is polyquaternium 1.
The film forming agent is hydroxypropyl methyl cellulose.
The viscosity of the hydroxypropylmethylcellulose was 5mPa · s.
The hydroxypropyl methylcellulose is commercially available from a manufacturer's package, Shandong Weifang Strength composite, Inc.
The dispersant is a nonionic surfactant.
The nonionic surfactant is an alkylolamide.
The alkylolamide is lauric acid diethanolamide.
The cosolvent is a small molecular alcohol.
The micromolecular alcohol is glycerol.
A method of preparing an erasable aqueous long acting bacteriostatic film coating, the method comprising the steps of: adding water, a disinfection factor, a film forming agent, a dispersing agent and a cosolvent into a reactor in proportion, and uniformly stirring; and (5) obtaining the product.
Example 5
The erasable water-based long-acting antibacterial film coating agent is prepared from 4.5 parts of disinfection factor, 2.3 parts of film forming agent, 4 parts of dispersing agent, 15 parts of cosolvent and 80 parts of water in parts by weight.
The disinfection factor is polyquaternium 1.
The film forming agent is hydroxypropyl methyl cellulose.
The viscosity of the hydroxypropyl methylcellulose is 4000mPa · s.
The hydroxypropyl methylcellulose is commercially available from a manufacturer's package, Shandong Weifang Strength composite, Inc.
The dispersant is a nonionic surfactant.
The nonionic surfactant is an alkylolamide.
The alkylolamide is lauric acid diethanolamide.
The cosolvent is a small molecular alcohol.
The micromolecular alcohol is glycerol.
A method of preparing an erasable aqueous long acting bacteriostatic film coating, the method comprising the steps of: adding water, a disinfection factor, a film forming agent, a dispersing agent and a cosolvent into a reactor in proportion, and uniformly stirring; and (5) obtaining the product.
Example 6
The erasable water-based long-acting antibacterial film coating agent is prepared from 4.5 parts of disinfection factor, 2.3 parts of film forming agent, 4 parts of dispersing agent, 15 parts of cosolvent and 80 parts of water in parts by weight.
The disinfection factor is polyquaternium 1.
The film forming agent is hydroxypropyl methyl cellulose.
The viscosity of the hydroxypropylmethylcellulose was 50mPa · s.
The hydroxypropyl methylcellulose is commercially available from a manufacturer's package, Shandong Weifang Strength composite, Inc.
The dispersant is isopropanol amide.
The cosolvent is a small molecular alcohol.
The micromolecular alcohol is glycerol.
A method of preparing an erasable aqueous long acting bacteriostatic film coating, the method comprising the steps of: adding water, a disinfection factor, a film forming agent, a dispersing agent and a cosolvent into a reactor in proportion, and uniformly stirring; and (5) obtaining the product.
Example 7
The erasable water-based long-acting antibacterial film coating agent is prepared from 4.5 parts of disinfection factor, 2.3 parts of film forming agent, 4 parts of dispersing agent, 15 parts of cosolvent and 80 parts of water in parts by weight.
The disinfection factor is polyquaternium 1.
The film forming agent is polyvinyl alcohol.
The dispersant is a nonionic surfactant.
The nonionic surfactant is an alkylolamide.
The alkylolamide is lauric acid diethanolamide.
The cosolvent is a small molecular alcohol.
The micromolecular alcohol is glycerol.
A method of preparing an erasable aqueous long acting bacteriostatic film coating, the method comprising the steps of: adding water, a disinfection factor, a film forming agent, a dispersing agent and a cosolvent into a reactor in proportion, and uniformly stirring; and (5) obtaining the product.
Example 8
The erasable water-based long-acting antibacterial film coating agent is prepared from 4.5 parts of disinfection factor, 2.3 parts of film forming agent, 4 parts of dispersing agent, 15 parts of cosolvent and 80 parts of water in parts by weight.
The disinfection factor is polyquaternium 1.
The film forming agent is hydroxypropyl methyl cellulose.
The viscosity of the hydroxypropylmethylcellulose was 50mPa · s.
The hydroxypropyl methylcellulose is commercially available from a manufacturer's package, Shandong Weifang Strength composite, Inc.
The dispersing agent is zinc stearate.
The cosolvent is a small molecular alcohol.
The micromolecular alcohol is glycerol.
A method of preparing an erasable aqueous long acting bacteriostatic film coating, the method comprising the steps of: adding water, a disinfection factor, a film forming agent, a dispersing agent and a cosolvent into a reactor in proportion, and uniformly stirring; and (5) obtaining the product.
Evaluation of Performance
1. Long-lasting antibacterial effect
The erasable water-based long-acting bacteriostatic coating agents prepared in examples 1-8 are respectively coated on the surfaces of walls with mold, the walls are kept still for 2 weeks, the mold conditions before and after coating are observed, and the test results are shown in the following table 1.
2. Flexibility of the film layer
The erasable water-based long-acting bacteriostatic coating agents prepared in the embodiments 1 to 8 are respectively coated on the same plastic films, and the thickness and the area of the coating agents are the same; after the coating agent is dried, the plastic film is folded in half, the breaking degree of the film layer is recorded, and the test results are shown in the following table 1.
3. Erasable property
The erasable water-based long-acting bacteriostatic coating agents prepared in examples 1 to 8 were respectively applied to the surfaces of walls with mold, after the coating layers were dried, the coating positions were wiped with a wet towel, and the residual degree of the coating layers was recorded, and the test results are shown in table 1 below.
4. Elongation at break
The mechanical properties of the coatings prepared in examples 1 to 8 were tested according to GB/T1039-1992 and the results are shown in Table 1 below.
TABLE 1 test results
| Bacteriostatic activity | Flexibility | Erasable property | Elongation at break | |
| Example 1 | Without mould | Good taste | Has no residue | 3.95％ |
| Example 2 | Without mould | Good taste | Has no residue | 3.91％ |
| Example 3 | Without mould | Good taste | Has no residue | 3.87％ |
| Example 4 | A small amount of mould | In general | Has no residue | 3.27％ |
| Example 5 | A small amount of mould | In general | A large amount of residues | 4.52％ |
| Example 6 | A large amount of mould | Worst case | A large amount of residues | 2.18％ |
| Example 7 | A large amount of mould | Is poor | Small amount of residue | 2.86％ |
| Example 8 | A large amount of mould | In general | Small amount of residue | 3.09％ |
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (10)
1. An erasable water-based long-acting bacteriostatic coating agent is characterized by comprising the following raw materials in parts by weight: 0.0002 to 10 parts of disinfection factor, 0.05 to 5 parts of film forming agent, 0.02 to 10 parts of dispersant, 2 to 30 parts of cosolvent and 50 to 90 parts of water.
2. The erasable aqueous long-acting bacteriostatic coating agent according to claim 1, wherein the disinfecting factor is selected from one or more of polyquaternium, double-chain quaternary ammonium salt, single-chain quaternary ammonium salt and polyhexamethylene guanidine compound.
3. An erasable aqueous long-acting bacteriostatic film coating according to claim 1 wherein said film forming agent is selected from one or more of hydroxypropyl methylcellulose, sodium carboxymethylcellulose, polyvinyl alcohol, polyvinyl pyrrolidone.
4. The erasable aqueous long-acting bacteriostatic coating agent according to claim 1, wherein the dispersant is a nonionic surfactant.
5. The erasable aqueous long-acting bacteriostatic coating agent according to claim 4, wherein the non-ionic surfactant is selected from one or more of long-chain fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, polyoxyethylene alkylamine, alkylolamide and alkyl glycoside.
6. An erasable aqueous long acting bacteriostatic coating agent according to claim 4 or 5 wherein said non-ionic surfactant is an alkylolamide.
7. The erasable aqueous long-acting bacteriostatic coating agent according to claim 1, wherein the cosolvent is a small molecule alcohol.
8. The erasable aqueous long-acting bacteriostatic coating agent according to claim 7, wherein the small molecular alcohol is selected from one or more of ethanol, isopropanol, n-propanol, propylene glycol, glycerol, ethylene glycol, n-butanol, low molecular weight polyvinyl alcohol.
9. The erasable aqueous long-acting bacteriostatic coating agent according to claim 1, wherein the mass ratio of the film forming agent to the cosolvent is 1: (0.4-10).
10. A method of preparing an erasable aqueous long acting bacteriostatic coating agent according to any one of claims 1 to 9, wherein said method of preparation comprises at least the steps of:
adding water, a disinfection factor, a film forming agent, a dispersing agent and a cosolvent into a reactor in proportion, and uniformly stirring; and (5) obtaining the product.
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