CN110742063A - Slow-release composite mildew inhibitor and preparation method thereof - Google Patents
Slow-release composite mildew inhibitor and preparation method thereof Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
- A01N47/12—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing a —O—CO—N< group, or a thio analogue thereof, neither directly attached to a ring nor the nitrogen atom being a member of a heterocyclic ring
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
- A01N47/18—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing a —O—CO—N< group, or a thio analogue thereof, directly attached to a heterocyclic or cycloaliphatic ring
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides
- A01N47/48—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides containing —S—C≡N groups
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C11/00—Surface finishing of leather
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Abstract
The invention provides a slow-release composite mildew inhibitor and a preparation method thereof, wherein the slow-release composite mildew inhibitor comprises the following components: 20-35% of liquid mildew-proof active ingredient and solid mildew-proof active ingredient, 5-30% of porous carrier, 5-20% of emulsifier and the balance of diffusant. According to the invention, the porous carrier is used for adsorbing the liquid mildew-proof active ingredient to form powder, so that the powder composite mildew inhibitor can be compounded with the solid mildew-proof active ingredient to form powder, the effects of the liquid mildew-proof active ingredient and the solid mildew-proof active ingredient can be simultaneously retained, and the mildew-proof performance is further improved by utilizing the synergistic effect of the liquid mildew-proof active ingredient and the solid mildew-proof active ingredient; and the adsorption effect of the porous carrier can slowly release the liquid mildew-proof component, prolong the action time of the mildew-proof agent and overcome the defect that the liquid mildew-proof agent is easy to run off when directly attached to leather.
Description
Technical Field
The invention relates to the field of leather mildew prevention, and particularly relates to a slow-release composite mildew inhibitor and a preparation method thereof.
Background
Leather mildew is always a headache problem for leather manufacturers, and with the increasingly wide application range of leather products, the export quantity of leather in China increases year by year, and the elimination of the leather mildew problem becomes more important. There are many ways to prevent leather from mildewing, the most commonly used effective method being the addition of a mildewcide. Common leather mildew preventive products comprise liquid, emulsion or powder, wherein the liquid product has the defects of strong solvent smell, environmental pollution, easy nonuniform emulsification and short drug effect, the emulsion product has the defect of easy layering in the storage process, and the powder does not have the defects due to different physical and chemical properties.
The composite mildew inhibitor is a multi-component mildew inhibitor for improving the mildew-proof effect by utilizing the synergistic interaction among various mildew-proof active ingredients, most of the conventional powder composite mildew inhibitors are prepared from different solid mildew-proof active ingredients, and the synergistic interaction of the composite mildew inhibitors is not obvious. If the liquid mildew-proof active ingredient and the solid mildew-proof active ingredient can be prepared into the powder type composite mildew-proof agent together, the mildew-proof effect can be greatly improved, and the defects of the liquid type mildew-proof agent, such as large solvent smell, nonuniform emulsification, easy loss of drug effect, easy layering and the like, can be avoided. However, the liquid mildewproof active ingredient and the solid mildewproof active ingredient have larger difference in physical state, so that the preparation of the liquid mildewproof active ingredient into the powder type composite mildewproof agent and the maintenance of good dispersibility are always difficult.
Disclosure of Invention
The invention aims to solve the problem that liquid mildew-proof active ingredients are not easy to prepare powder, and provides a slow-release type composite mildew inhibitor formed by compounding the liquid mildew-proof active ingredients and solid mildew-proof active ingredients and a preparation method thereof.
The invention provides a slow-release composite mildew inhibitor which comprises the following components in percentage by mass:
further, the porous carrier is one or more of activated clay, bentonite, white carbon black, diatomite and kaolin.
Further, the mass ratio of the liquid mildew-proof active ingredient to the solid mildew-proof active ingredient is 1: 1.2-1: 5.
Further, the solid mildew-proof active component is one or more of carbendazim, iodopropynyl butyl carbamate (IPBC), dithiocyano Methane (MBT) and o-phenylphenol 4, 5-dichloro-N-octyl-4-isothiazoline-3-ketone (DCOIT).
Further, the liquid mildew-proof active ingredient is one or more of 2-thiocyanomethyl-thiobenzothiazole (TCMTB), Benzisothiazolinone (BIT) and Octyl Isothiazolinone (OIT).
Further, the dispersing agent is one or more of anhydrous sodium sulfate, magnesium sulfate and ammonium sulfate.
Further, the emulsifier is one or more of fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, tween and alkylbenzene sulfonate.
The invention also provides a preparation method of the slow-release composite mildew inhibitor, which comprises the following steps:
(1) dissolving the liquid mildew-proof active ingredient in an organic solvent to prepare a liquid mildew-proof active ingredient solution;
(2) spraying the liquid mildew-proof active ingredient solution on a porous carrier, uniformly mixing, and drying to obtain powder adsorbed with the liquid mildew-proof active ingredient;
(3) and (3) uniformly mixing the powder obtained in the step (2) with a solid mildew-proof active ingredient, a dispersing agent and an emulsifying agent to obtain the slow-release composite mildew inhibitor.
Further, the organic solvent is absolute ethyl alcohol.
Further, the drying temperature in the step (2) is 50-60 ℃.
Compared with the prior art, the composite mildew inhibitor has the advantages that the porous carrier is used for adsorbing the liquid mildew-proof active ingredient to form powder, so that the composite mildew inhibitor can be compounded with the solid mildew-proof active ingredient to form powder, the effects of the liquid mildew-proof active ingredient and the solid mildew-proof active ingredient can be simultaneously reserved, and the mildew resistance can be further improved by utilizing the synergistic effect of the liquid mildew-proof active ingredient and the solid mildew-proof active ingredient; and the adsorption effect of the porous carrier can slowly release the liquid mildew-proof component, prolong the action time of the mildew-proof agent and overcome the defect that the liquid mildew-proof agent is easy to run off when directly attached to leather.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific examples.
Example 1
In the embodiment, activated clay is taken as a porous carrier, emulsifier AEO-9, sodium dodecyl benzene sulfonate and anhydrous sodium sulfate serving as a diffusant are combined, and a liquid-state mildew-proof active ingredient OIT and a solid-state mildew-proof active ingredient MBT are compounded into a slow-release composite mildew inhibitor of powder, and the specific preparation method comprises the following steps:
(1) OIT solution was prepared by mixing 8 parts OIT with 2 parts AEO-9 and 10 parts absolute ethanol.
(2) Pouring 30 parts of activated clay into a ribbon mixer with a heating function and atomizing nozzles at two ends, atomizing and spraying the OIT solution prepared in the step (1) on the activated clay while stirring, and stirring for 30 minutes to fully adsorb the activated clay. And (3) after uniformly mixing, heating the materials to 55 ℃, and drying the absolute ethyl alcohol to obtain powder adsorbed with the OIT.
(3) And (3) sequentially adding 22 parts of MBT, 40 parts of anhydrous sodium sulfate and 5 parts of sodium dodecyl benzene sulfonate into a mixer, stirring for 35min, and uniformly mixing with the powder in the step (2) to obtain the powdery slow-release composite mildew preventive.
Example 2
The embodiment takes activated clay as a porous carrier, combines an emulsifier castor oil polyoxyethylene ether, sodium dodecyl benzene sulfonate and a diffusant anhydrous sodium sulfate, and compounds a liquid mildewproof active ingredient OIT and a solid mildewproof active ingredient IPBC into a slow-release composite mildewproof agent of powder, and the specific preparation method comprises the following steps:
(1) and (3) mixing 7 parts of OIT, 3 parts of castor oil polyoxyethylene ether and 10 parts of absolute ethyl alcohol to prepare an OIT solution.
(2) Pouring 30 parts of activated clay into a ribbon mixer with a heating function and atomizing nozzles at two ends, atomizing and spraying the prepared OIT solution prepared in the step (1) on the activated clay while stirring, fully adsorbing the activated clay, and stirring for 30 minutes. And (3) after uniformly mixing, heating the materials to 55 ℃, and drying the absolute ethyl alcohol to obtain powder adsorbed with the OIT.
(3) And (3) sequentially adding 20 parts of IPBC, 40 parts of anhydrous sodium sulfate and 5 parts of sodium dodecyl benzene sulfonate into a mixer, stirring for 35min, and uniformly mixing with the powder in the step (2) to obtain the powdery slow-release composite mildew preventive.
Example 3
In the embodiment, white carbon black is used as a porous carrier, an emulsifier castor oil polyoxyethylene ether, sodium dodecyl benzene sulfonate and a diffusant anhydrous sodium sulfate are combined, and a liquid mildew-proof active ingredient TCMTB and a solid mildew-proof active ingredient carbendazim are compounded into a slow-release composite mildew inhibitor of powder, and the specific preparation method comprises the following steps:
(1) 6 parts of TCMTB, 4 parts of castor oil polyoxyethylene ether and 10 parts of absolute ethyl alcohol are mixed to prepare a TCMTB solution.
(2) And (2) pouring 20 parts of white carbon black into a spiral ribbon mixer with a heating function and atomizing nozzles at two ends, atomizing and spraying the TCMTB solution prepared in the step (1) onto the porous carrier while stirring, fully adsorbing the TCMTB solution, and stirring for 30 minutes. After being mixed evenly, the materials are heated to 55 ℃, and the anhydrous ethanol is dried to obtain powder which adsorbs TCMTB.
(3) And (3) sequentially adding 20 parts of carbendazim, 50 parts of anhydrous sodium sulfate and 3 parts of sodium dodecyl benzene sulfonate into a mixer, stirring for 35min, and uniformly mixing with the powder in the step (2) to obtain the powdery slow-release composite mildew preventive.
Example 4
In the embodiment, white carbon black is used as a porous carrier, emulsifier castor oil polyoxyethylene ether, sodium dodecyl benzene sulfonate and anhydrous sodium sulfate serving as a diffusant are combined, liquid mildewproof active ingredients OIT and TCMTB and a solid mildewproof active ingredient IPBC are compounded into a slow-release composite mildewproof agent of powder, and the preparation method specifically comprises the following steps:
(1) and 3 parts of OIT, 5 parts of TCMTB, 2 parts of castor oil polyoxyethylene ether and 10 parts of absolute ethyl alcohol are mixed to prepare an OIT-TCMTB solution.
(2) Pouring 20 parts of white carbon black into a spiral ribbon mixer with a heating function and atomizing nozzles at two ends, atomizing and spraying the OIT-TCMTB solution prepared in the step (1) on a porous carrier while stirring, fully adsorbing the solution, and stirring for 30 minutes. And (3) heating the materials to 55 ℃ after uniformly mixing, and drying the absolute ethyl alcohol to obtain powder adsorbing the OIT and TCMTB.
(3) And (3) sequentially adding 22 parts of IPBC, 50 parts of anhydrous sodium sulfate and 5 parts of sodium dodecyl benzene sulfonate into a mixer, stirring for 35min, and uniformly mixing with the powder in the step (2) to obtain the powdery slow-release composite mildew preventive.
Example 5
In the embodiment, white carbon black is used as a porous carrier, emulsifier castor oil polyoxyethylene ether, sodium dodecyl benzene sulfonate and diffusant anhydrous sodium sulfate are combined, and a liquid mildewproof active ingredient OIT and a solid mildewproof active ingredient carbendazim are compounded into a slow-release composite mildewproof agent of powder, and the specific preparation method comprises the following steps:
(1) and mixing 8 parts of OIT, 2 parts of castor oil polyoxyethylene ether and 10 parts of absolute ethyl alcohol to prepare an OIT solution.
(2) And (2) pouring 20 parts of white carbon black into a spiral ribbon mixer with a heating function and atomizing nozzles at two ends, atomizing and spraying the OIT solution prepared in the step (1) on a porous carrier while stirring, fully adsorbing the solution, and stirring for 30 minutes. And (3) after uniformly mixing, heating the materials to 55 ℃, and drying the absolute ethyl alcohol to obtain powder adsorbed with the OIT.
(3) And (3) sequentially adding 20 parts of carbendazim, 50 parts of anhydrous sodium sulfate and 3 parts of sodium dodecyl benzene sulfonate into a mixer, stirring for 35min, and uniformly mixing with the powder in the step (2) to obtain the powdery slow-release composite mildew preventive.
In addition, under the condition of keeping the ratio of the total amount of the OIT and the carbendazim to other components unchanged, the mass ratio of the OIT to the carbendazim is adjusted to 1:1.5, 1:2, 1:3.5, 1:5 or 1.5:2, and the corresponding slow-release composite mildew inhibitor is prepared by adopting the same preparation method.
Example 6
In the embodiment, bentonite, diatomite or kaolin is used as a porous carrier, and an emulsifier castor oil polyoxyethylene ether, sodium dodecyl benzene sulfonate and a dispersing agent magnesium sulfate or ammonium sulfate are combined to compound a liquid mildew-proof active ingredient BIT and a solid mildew-proof active ingredient DCOIT into a slow-release composite mildew inhibitor of powder, wherein the specific preparation method comprises the following steps:
(1) mixing 8 parts of BIT, 2 parts of castor oil polyoxyethylene ether and 10 parts of absolute ethyl alcohol to prepare a BIT solution.
(2) Pouring 20 parts of bentonite or diatomite or kaolin into a ribbon mixer with a heating function and atomizing nozzles at two ends, atomizing and spraying the BIT solution prepared in the step (1) on a porous carrier while stirring, fully adsorbing the porous carrier, and stirring for 30 minutes. And (3) after uniformly mixing, heating the materials to 55 ℃, and drying the absolute ethyl alcohol to obtain the powder adsorbed with BIT.
(3) And (3) sequentially adding 20 parts of DCOIT, 50 parts of anhydrous sodium sulfate and 3 parts of sodium dodecyl benzene sulfonate into a mixer, stirring for 35min, and uniformly mixing with the powder in the step (2) to obtain the powdery slow-release composite mildew preventive.
The slow-release compound mildew inhibitor prepared in the above examples 1 to 6 is subjected to physical and chemical property tests, and the test results are as follows:
1. product appearance and uniformity
The slow-release composite mildew inhibitor prepared in the embodiments 1 to 6 is dry powder in appearance, and has no caking phenomenon. All products had no pungent odor. The same sample was randomly sampled at different positions, and the content of the effective components was measured, and the results are shown in table 1 below:
TABLE 1 content of active ingredient at different positions in the sample
Table 1 shows that the active ingredients of the slow-release composite mildew inhibitor prepared by the invention are distributed very uniformly.
2. Residual amount of solvent in product
By adopting a headspace sampling mode, the sustained-release composite mildewcide in the embodiments 1 to 5 is subjected to GC-MS test, and the result shows that all the sustained-release composite mildewcides do not contain ethanol, namely, the product has no solvent residue.
The preparation method of the invention uses absolute ethyl alcohol to dilute the liquid mildew-proof active ingredient so as to be beneficial to preparing spray, and removes the absolute ethyl alcohol by heating in the later period, thus really achieving that the product does not contain solvent.
3. Antibacterial and mildewproof property test
1) The antibacterial and mildew-proof performances of the single mildew inhibitor and the compound mildew inhibitor are compared
The results of the tests on the anti-mildew effects of OIT and carbendazim when used alone and the compositions of example 5 in different proportions are shown in Table 2:
TABLE 2 mildew-proofing effect of active ingredients in different proportions
| OIT carbendazim | Aspergillus flavus and Penicillium citrinum | Jiasheng leather mixed mould | Haoyuan leather mixed mould |
| 1:0 | 3 | 5 | 10 |
| 0:1 | 10 | 13 | 15 |
| 1:1.5 | 15 | 14 | 16 |
| 1:2 | 18 | 19 | 19 |
| 1:3.5 | 17 | 17 | 20 |
| 1:5 | 15 | 16 | 17 |
| 1.5:2 | 18 | 20 | 20 |
Note: 1. the addition amount of the mildew preventive is 0.1%, the data in the table represents the width of a bacteriostatic zone, the unit is mm, and the larger the numerical value is, the better the bacteriostatic effect is. 2. The Jiasheng leather mixed mould is a mixed mould of aspergillus flavus, paecilomyces varioti and aspergillus parasiticus, and the Haoyuan leather mixed mould is a mixed mould of special penicillium, penicillium citrinum and aspergillus flavus.
As can be seen from Table 2, the single carbendazim has a stronger bacteriostatic effect than the single octyl isothiazolinone, and after the octyl isothiazolinone and the carbendazim are compounded, the bacteriostatic effect is obviously improved, and the octyl isothiazolinone and the carbendazim generate an obvious synergistic effect, so that the compounded bacteriostatic effect is better than the simple addition of the octyl isothiazolinone and the carbendazim.
2) The performance of the mildew preventive in the embodiment is compared with that of the commonly used mildew preventive on the market
The mildew preventive of the present example and isothiazolinone liquid type mildew preventive of the company, leather mildew preventive No. 4 and leather mildew preventive No. 5 were tested by the bacteriostatic circle method, and the test data are shown in table 3:
TABLE 3 determination of the Effect of various fungicides by the bacteriostatic Loop method
Note: i, II in the table represent two parallel samples, respectively. The mixed mould in the laboratory is mixed mould of aspergillus flavus, penicillium citrinum and specific penicillium.
Table 3 shows that the mildewcide of the present example has a stronger and more durable mildewproofing effect than liquid isothiazolinone mildewcides.
In conclusion, the liquid mildew-proof active ingredient is adsorbed by the porous carrier, so that the powder slow-release antibacterial agent with good dispersity of the solid mildew-proof active ingredient can be effectively combined, the mildew-proof capability is obviously improved, and the mildew-proof time is prolonged.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A slow-release compound mildew preventive is characterized in that: the composite material comprises the following raw materials in percentage by mass:
2. the slow-release composite mildew inhibitor according to claim 1, wherein: the porous carrier is one or more of activated clay, bentonite, white carbon black, diatomite and kaolin.
3. The slow-release composite mildew inhibitor according to claim 1, wherein: the mass ratio of the liquid mildew-proof active ingredient to the solid mildew-proof active ingredient is 1: 1.2-1: 5.
4. The slow-release composite mildew inhibitor according to claim 3, wherein: the solid mildew-proof active component is one or more of carbendazim, iodopropynyl butyl carbamate, dithiocyano methane and o-phenylphenol 4, 5-dichloro-N-octyl-4-isothiazoline-3-ketone.
5. The slow-release composite mildew inhibitor according to claim 3, wherein: the liquid mildew-proof active component is one or more of 2-thiocyanomethyl thio benzothiazole, benzisothiazolinone and octyl isothiazolinone.
6. The slow-release composite mildew inhibitor according to claim 1, wherein: the dispersing agent is one or more of anhydrous sodium sulfate, magnesium sulfate and ammonium sulfate.
7. The slow-release composite mildew inhibitor according to claim 1, wherein: the emulsifier is one or more of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene, tween and alkylbenzene sulfonate.
8. A preparation method of a slow-release compound mildew preventive is characterized by comprising the following steps: the slow-release compound mildew inhibitor comprises the raw materials as defined in any one of claims 1 to 7, and comprises the following steps:
(1) dissolving the liquid mildew-proof active ingredient in an organic solvent to prepare a liquid mildew-proof active ingredient solution;
(2) spraying the liquid mildew-proof active ingredient solution on a porous carrier, uniformly mixing, and drying to obtain powder adsorbed with the liquid mildew-proof active ingredient;
(3) and (3) uniformly mixing the powder obtained in the step (2) with a solid mildew-proof active ingredient, a dispersing agent and an emulsifying agent to obtain the slow-release composite mildew inhibitor.
9. The method of claim 8, wherein: the organic solvent is absolute ethyl alcohol.
10. The method of claim 8, wherein: the drying temperature in the step (2) is 50-60 ℃.
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| CN112852207A (en) * | 2021-02-23 | 2021-05-28 | 广东施彩新材料科技有限公司 | Polylactic acid PDLLA slow-release antibacterial agent and preparation method and application thereof |
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