CN117397683A - Antibacterial mildew inhibitor, cat litter and bi-component cat litter product - Google Patents
Antibacterial mildew inhibitor, cat litter and bi-component cat litter product Download PDFInfo
- Publication number
- CN117397683A CN117397683A CN202311257010.9A CN202311257010A CN117397683A CN 117397683 A CN117397683 A CN 117397683A CN 202311257010 A CN202311257010 A CN 202311257010A CN 117397683 A CN117397683 A CN 117397683A
- Authority
- CN
- China
- Prior art keywords
- cat litter
- mildew
- antibacterial
- polyvinyl alcohol
- bacteriostatic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/015—Floor coverings, e.g. bedding-down sheets ; Stable floors
- A01K1/0152—Litter
- A01K1/0154—Litter comprising inorganic material
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/015—Floor coverings, e.g. bedding-down sheets ; Stable floors
- A01K1/0152—Litter
- A01K1/0155—Litter comprising organic material
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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
- A01N31/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic oxygen or sulfur compounds
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Abstract
The invention relates to the field of mildew prevention and bacteriostasis, and discloses a bacteriostasis mildew preventive, cat litter and a bi-component cat litter product. The antibacterial mildew inhibitor comprises a mildew inhibitor and a bacteriostatic agent wrapped by polyvinyl alcohol, and a filler; wherein the weight ratio of the polyvinyl alcohol to the mildew inhibitor to the bacteriostatic agent is (10-20) (1-2.5) (1), and the weight ratio of the polyvinyl alcohol to the filler is 1:1/2-1:2. According to the invention, polyvinyl alcohol with a specific structure is utilized to emulsify and wrap the antibacterial agent and the mildew preventive according to a specific proportion, so that the antibacterial mildew preventive is obtained; the antibacterial mildew inhibitor is added into cat litter, so that the finally prepared cat litter is not only uniformly distributed, but also the caking speed and strength of the cat litter are not affected.
Description
Technical Field
The invention relates to the field of mildew-proof antibacterial agents, in particular to a bacteriostatic and mildew-proof agent, cat litter and a bi-component cat litter product.
Background
The penetration rate of the cat litter in cat cleaning products is very high, wherein the plant cat litter has the highest specific gravity in the chinese market. From the perspective of consumers, the plant cat litter has the characteristics of easy agglomeration, easy flushing of a toilet and small dust; from the aspect of sustainable development, plant cat litter is easy to degrade compared with bentonite cat litter and mineral litter; however, the problem is also existed that the cat owner does not treat the cat urine mass in time, and the bacteria are propagated in a large quantity to generate more smelly smell; the plant cat litter absorbs moisture easily, and can cause bacteria breeding problem, so that mould is easy to generate, and the health of the cat is influenced. Therefore, cat litter products with certain antibacterial and mildew-proof functions are necessary.
In the prior art, the bacteriostatic effect is usually achieved by adding a bacteriostatic agent to cat litter. For example, chinese patent CN15956510a discloses a synergistic high-efficiency deodorizing cat litter and a preparation method thereof, which achieves bacteriostatic effect by adding quaternary ammonium salt bacteriostatic agent; chinese patent CN106342701B discloses an aromatic degerming type apple tree compound cat litter, which achieves an antibacterial effect by adding nano silver and benzalkonium chloride.
However, the problem of mould prevention of the cat litter itself is not related to in the prior art. Although a certain mildew-proof function can be achieved by adding the bacteriostat, the mildew-proof function of the bacteriostat is far insufficient in a long-time humid environment or under the condition that the excretion of the cat is not cleaned in time. Therefore, the team tries to compound the antibacterial agent and the mildew preventive in the early stage and then adds the antibacterial agent and the mildew preventive into cat litter so as to achieve the antibacterial and mildew-proof purposes. However, in the actual production process, the antibacterial agent and the mildew preventive are unevenly distributed in the molded cat litter, so that the problem of poor antibacterial and mildew-proof effects still exists. In subsequent researches, the team tries to wrap the antibacterial agent and the mildew preventive by using the polyvinyl alcohol to solve the problem of uneven dispersion, but the characteristics of high viscosity and strong film forming property of the polyvinyl alcohol are found to be unfavorable for forming the antibacterial mildew preventive, and the agglomeration speed and strength of the antibacterial mildew preventive are negatively influenced after the antibacterial mildew preventive is added into plant cat litter.
Disclosure of Invention
In order to solve the technical problems, the invention provides a bacteriostatic mildew inhibitor, cat litter and a bi-component cat litter product. According to the invention, polyvinyl alcohol with a specific structure is utilized to emulsify and wrap the antibacterial agent and the mildew preventive according to a specific proportion, so that the antibacterial mildew preventive is obtained; the antibacterial mildew inhibitor is added into cat litter, so that the finally prepared cat litter is not only uniformly distributed, but also the caking speed and strength of the cat litter are not affected.
The specific technical scheme of the invention is as follows:
in a first aspect, the invention provides a bacteriostatic and mildew-proof agent, comprising a mildew-proof agent and a bacteriostatic agent wrapped by polyvinyl alcohol, and a filler; wherein the weight ratio of the polyvinyl alcohol to the mildew inhibitor to the bacteriostatic agent is (10-20) to (1-2.5) to 1, and the weight ratio of the polyvinyl alcohol to the filler is 1:1/2-1:2.
Preferably, the weight ratio of the polyvinyl alcohol to the bacteriostatic agent to the mildew preventive is (10-18) to (1-2.5) to 1; further preferably (12-18) to (1.5-2.5) to 1. The weight ratio of the polyvinyl alcohol to the filler is 1:1-1:2.
In order to endow cat litter with antibacterial and mildew-proof properties, the team tries to compound the antibacterial agent and the mildew-proof agent and then add the antibacterial agent and the mildew-proof agent into cat litter in the early stage, and the result shows that the antibacterial agent and the mildew-proof agent are unevenly distributed in the formed cat litter in the actual production process, so that the cat litter has poor antibacterial and mildew-proof effects. In subsequent researches, the team tries to wrap the antibacterial agent and the mildew preventive by using the polyvinyl alcohol to solve the problem of uneven dispersion, but discovers that the characteristics of high viscosity and strong film forming property of the polyvinyl alcohol are unfavorable for forming the antibacterial mildew preventive, and the agglomeration speed and strength of the antibacterial mildew preventive are negatively influenced after the antibacterial mildew preventive is added into plant cat litter. Therefore, after further research, the invention discovers that the antibacterial mildew inhibitor is obtained by using polyvinyl alcohol to emulsify and wrap the antibacterial agent and the mildew inhibitor according to a specific proportion; the antibacterial mildew inhibitor is added into cat litter, so that the finally prepared cat litter is not only uniformly distributed, but also the caking speed and strength of the cat litter are not affected.
Under the condition that the total amount of the bacteriostatic agent and the mildew preventive is unchanged, the polyvinyl alcohol has certain specific gravity on the emulsifying and wrapping performance of the bacteriostatic agent and the mildew preventive, and the weight ratio of the polyvinyl alcohol to the mildew preventive to the bacteriostatic agent is not lower than 10:1-2.5:1; after the excessive polyvinyl alcohol wraps the antibacterial agent and the mildew preventive, the antibacterial agent and the mildew preventive are not beneficial to release in the inner cavity of the polyvinyl alcohol, and the antibacterial and mildew-proof performances are affected, so that the weight ratio of the polyvinyl alcohol to the mildew preventive to the antibacterial agent is not higher than 20: (1-2.5):1; in order to better facilitate the release of the bacteriostatic agent and the mildew preventive, more preferably, the weight ratio of the polyvinyl alcohol to the mildew preventive to the bacteriostatic agent is (10-18) to (1-2.5) to 1; in order to better facilitate the wrapping of the polyvinyl alcohol, the weight ratio of the polyvinyl alcohol, the mildew inhibitor and the bacteriostat is more preferably (12-18) to (1-2.5) to 1. In order to further improve the mildew resistance of the cat litter, the weight ratio of the polyvinyl alcohol to the mildew inhibitor to the bacteriostatic agent is preferably (12-18) to (1.5-2.5) to 1.
Preferably, the molecular structure of the polyvinyl alcohol is as follows:
wherein R is 1 And R is 2 Selected from-H, -OH, -OOCCH 3 And R is 1 And R is 2 With only-H and-OH, -H and-OOCCH present therebetween 3 Two combination modes; n is n 1 And n 2 The sum is less than 1000. Preferably, the hydroxyl group number in the polyvinyl alcohol is OH/(R) 1 +OH) or OH/(R) 2 +OH) is 80 to 90%, more preferably 82 to 88%.
The molecular structure of the polyvinyl alcohol contains both hydroxyl hydrophilic groups and hydrocarbon hydrophobic groups, so that the polyvinyl alcohol can reduce the surface tension of aqueous solution and has certain emulsifying property; the team of the invention discovers that in the process of wrapping the bacteriostatic agent and the mildew preventive by using the polyvinyl alcohol and then adding the wrapped bacteriostatic agent and the mildew preventive to the cat litter, the hydroxyl number of the polyvinyl alcohol accounts for a critical factor and the polymerization degree has an influence on the caking speed and the strength of the cat litter, and the hydroxyl number accounts for the dissolution of the polyvinyl alcohol which is unfavorable for too high or too low of the hydroxyl number; the polymerization degree also affects the performance, and the higher the polymerization degree is, the higher the viscosity is, and the agglomeration rate is reduced; meanwhile, the polyvinyl alcohol also has strong film forming type. Therefore, the polyvinyl alcohol with specific hydroxyl number ratio and polymerization degree is required to be searched, the emulsion coating performance of the antibacterial agent and the mildew inhibitor is better, and the water absorption performance and the caking performance of cat litter are not affected.
Preferably, the polyvinyl alcohol is of type 0588, type 0585, type 0888 or type 0885. Wherein, 0588 type represents polymerization degree of 500 and alcoholysis degree of 88%; type 0585 represents a degree of polymerization of 500 and an alcoholysis degree of 85%;0888 type represents a degree of polymerization of 800 and an alcoholysis degree of 88%; type 0885 represents a degree of polymerization of 800 and an alcoholysis degree of 85%.
Preferably, the mildew preventive is selected from one or more of calcium propionate, sodium benzoate, sodium diacetate, potassium sorbate, dimethyl fumarate, methyl parahydroxybenzoate, methyl benzimidazole carbamate, n-octyl-4 isothiazolin-3-one, 3-iodo-2 propargyl butyl carbamate, 4,5 dichloro-2-n-octyl-4 isothiazolin-3-one; and preferably one or more of calcium propionate, methyl parahydroxybenzoate, n-octyl-4 isothiazolin-3-one, 4,5 dichloro-2-n-octyl-4 isothiazolin-3-one; further preferred are calcium propionate and n-octyl-4 isothiazolin-3-one.
Preferably, the bacteriostat has a halogenated phenol structure, and the molecular structure is as follows:
wherein each X is independently selected from chlorine or bromine, a is 1, 2 or 3; each Y is independently selected from C1-C4 alkyl or halophenoxy, and b is 1, 2 or 3.
Preferably, the bacteriostat is selected from one or more of 5-chloro-2- (2, 4-dichlorophenoxy) phenol, chloroxylenol and 5-chloro-2- (4-chlorophenoxy) phenol. Further preferred is 5-chloro-2- (4-chlorophenoxy) phenol, which may be available under the trade name Tinosan HP100 from BASF.
Preferably, the filler is selected from one or more of alpha-cyclodextrin, beta-cyclodextrin, carboxymethyl cellulose, hydroxypropyl methylcellulose and microcrystalline cellulose. Further preferably, the filler is selected from one or more of beta-cyclodextrin, hydroxypropyl cellulose, and microcrystalline cellulose.
In a second aspect, the invention provides antibacterial mildew-proof cat litter, which comprises the following components in percentage by mass: 40-80% of plant fiber, 10-25% of corn starch, 2-10% of guar gum, 4-12% of antibacterial mildew inhibitor, 1-5% of active carbon, 1-5% of bentonite, 1-5% of zeolite powder, 0-1% of graphene, 0-1% of mesoporous silicon and 0-0.5% of essence.
Preferably, the plant fiber is selected from one or more of pea fiber, soybean fiber, bamboo fiber, coffee grounds, fruit wood fiber, chestnut wood fiber, walnut wood fiber, corn stalk, peanut shell fiber and pulp fiber.
In a third aspect, the invention provides a preparation method of antibacterial mildew-proof cat litter, comprising the following steps:
(1) Pretreatment: placing polyvinyl alcohol into water at 55-70 ℃, stirring until the polyvinyl alcohol is clarified, gradually adding a bacteriostatic agent and a mildew preventive, and obtaining a premix after dissolving;
(2) Adding filler into the premix, drying, and pulverizing to above 100 mesh to obtain antibacterial mildew inhibitor;
(3) Mixing plant fiber, corn starch, guar gum, activated carbon, bentonite, zeolite powder, graphene, mesoporous silicon and essence, stirring uniformly, adding antibacterial and mildew-proof powder during stirring, and mixing uniformly;
(4) And transferring the obtained mixed material to a storage bin at 70-75 ℃, extruding particles for molding, and drying at 80-85 ℃ to obtain the antibacterial mildew-proof cat litter.
In a fourth aspect, the present invention provides a two-component cat litter product comprising:
independently packaged antibacterial mildew-proof cat litter; and
the cat litter deodorizing powder comprises the following components in percentage by mass: 60-95% of carbonate and/or bicarbonate, 5-40% of silicon dioxide, 0-10% of adhesive and 0-10% of other auxiliary agents; wherein part of the carbonate and/or bicarbonate is/are loaded in the silicon dioxide, and the loading is 60-80% of the silicon dioxide.
The existing cat litter deodorizing powder mainly uses inorganic salt (carbonate) as deodorizing effect substances, and the inorganic salt (carbonate) is applied to the surface of cat litter to neutralize the peculiar smell of cat urine. However, we find that the caking strength of the cat litter is obviously reduced after inorganic salt is sprayed on the surface of the cat litter, so that the cat litter is fragile, not only is the cleaning of the cat litter inconvenient, but also the deodorizing effect of the cat litter deodorizing powder is reduced. Through research, we find that the essential reason is that: the addition of inorganic salts changes the ionic balance and charge properties of the materials in the litter, which may affect the charge density on the litter particle surface, thereby changing the interparticle attraction and interaction, enhancing the rejection and reducing caking. Therefore, part of the inorganic salt is loaded in the silicon dioxide, the silicon dioxide has a porous structure and large specific surface area, a certain amount of inorganic salt can be loaded, and the loaded inorganic salt is not directly contacted with cat litter particles, so that the negative influence of the inorganic salt on the caking property of cat litter can be effectively reduced. In order to further reduce the negative influence of inorganic salt on the agglomeration of the cat litter, a proper amount of adhesive can be added into the deodorizing powder, so that good cohesiveness and adsorptivity can be provided, the influence of the deodorizing powder on the agglomeration capacity of the cat litter is further ensured to be reduced to the minimum, and even the cat litter is used in cat litter with poor agglomeration performance, and the cat litter agglomeration can be helped.
Preferably, the silica is activated to have an average particle diameter of 30 to 120 meshes and a specific surface area of 200 to 350m 2 And/g, the oil absorption value is 170-280 mL/100g.
The invention discovers that the common silicon dioxide has weaker loading capacity to inorganic salt at normal temperature, but the loading capacity can be greatly enhanced after the common silicon dioxide is activated at high temperature. In addition, the loading capacity of the activated silica is 10-50%, the loading capacity of the activated silica under the conditions of the particle size and the specific surface area can be remarkably improved, and the characteristics of the silica can be fully utilized to coat and load inorganic salt.
On the other hand, the present invention has also found that although silica can be effective in supporting inorganic salts, dust problems are easily generated when it is added to cat litter deodorizing powder. For this reason, the present inventors have found that by controlling the particle size of silica within the above-mentioned range, not only the loading capacity thereof is not affected, but also the amount of dust generated is small because the particle size is relatively large. However, we have found that, since silica itself is relatively light, even if the particle size is optimized during mixing, there is some abrasion and dust formation, and the user experience is impaired. Finally, the invention solves the problem of dust emission by reducing the silicon dioxide as much as possible under the condition that inorganic salt does not excessively influence the caking property of cat litter, namely only partial inorganic salt is loaded in the silicon dioxide (the content of the inorganic salt which is not loaded is ensured to not excessively influence the caking property of cat litter through experiments).
Preferably, the binder contains at least a polysaccharide binder. Further, the polysaccharide binder comprises one or more of guar gum, xanthan gum, locust bean gum, sesbania gum, and other galactomannan-based vegetable gums.
The invention discovers that the types of polysaccharide adhesives have obvious difference on the adhesive effect, and the reason for selecting the galactomannan vegetable gum is as follows: the adhesive has the highest viscosity in an aqueous solution environment with the pH value of 6-8, and the pH value of cat urine is about 7-7.5, so that the adhesive has better capability of agglomerating cat litter in a normal cat urine environment. In addition, because of the compatibility of inorganic salts (carbonate and bicarbonate) of the glue, the aqueous solution of the glue can show stronger tolerance to most monovalent salt ions, so that the glue can maintain viscosity in an inorganic salt environment and assist the agglomeration of cat litter.
Preferably, the 1% aqueous solution of the cat litter deodorizing powder has a pH of 7 to 9.
The cat litter deodorizing powder has a proper pH value, can neutralize cat urinary amino acid and other acidic odor sources in cat urine in weak alkaline environment, and has less irritation to cat sole meat pads.
Preferably, the preparation method of the cat litter deodorizing powder comprises the following steps:
step 1): the silica is heat activated.
Step 2): preparing partial carbonate and/or bicarbonate into saturated inorganic salt water solution, adding activated silica, soaking, filtering, vacuum drying, heating again for activation, and cooling to obtain inorganic salt@silica powder.
Step 3): and (3) weighing the inorganic salt@silicon dioxide powder obtained in the step (2) to obtain the loaded inorganic salt load, and fully mixing the inorganic salt@silicon dioxide powder with the rest of carbonate and/or bicarbonate, a binder and other auxiliary agents to obtain the cat litter deodorizing powder in the form of a powder mixture.
In the process, the two high-temperature activation functions are respectively as follows: the first activation of the step 1) is to heat and activate the silicon dioxide to change the surface property, increase the pore structure and the surface area, thereby improving the loading capacity and providing more effective adsorption sites for the subsequent loading of inorganic salt; step 2) the second activation is to help to enhance the interaction between the silica particles and the inorganic salt, enhancing the physical adsorption and binding forces between the two, and thus forming a more stable and efficient loading system.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, polyvinyl alcohol with a specific structure is utilized to emulsify and wrap the antibacterial agent and the mildew preventive according to a specific proportion, so that the antibacterial mildew preventive is obtained; the antibacterial mildew inhibitor is added into cat litter, so that the finally prepared cat litter is not only uniformly distributed, but also the caking speed and strength of the cat litter are not affected.
(2) The bi-component cat litter product comprises antibacterial and mildew-proof cat litter and cat litter deodorizing powder. According to the invention, part of inorganic salt in the cat litter deodorizing powder is loaded in the silicon dioxide, so that the direct contact between the inorganic salt and cat litter particles can be effectively avoided under the condition that the deodorizing effect is not affected, and the negative influence of the inorganic salt on the caking property of the cat litter can be effectively reduced.
Drawings
FIG. 1 is a graph showing the bacteriostatic effects of cat litter of example 1, comparative example 4 and comparative example 5;
fig. 2 is a graph showing the mildew-proof effect of cat litter of example 1, comparative example 3 and comparative example 5.
Detailed Description
The invention is further described below with reference to examples.
General examples
A bacteriostatic and mildew-proof agent comprises a mildew-proof agent and a bacteriostatic agent which are wrapped by polyvinyl alcohol, and a filler; wherein the weight ratio of the polyvinyl alcohol to the mildew inhibitor to the bacteriostatic agent is (10-20) to (1-2.5) to 1, and the weight ratio of the polyvinyl alcohol to the filling agent is 1:1/2-1:2; preferably, the weight ratio of the polyvinyl alcohol to the bacteriostatic agent to the mildew preventive is (10-18) to (1-2.5) to 1; further preferably (12-18) to (1.5-2.5) to 1; the weight ratio of the polyvinyl alcohol to the filler is 1:1-1:2.
Preferably, the molecular structure of the polyvinyl alcohol is as follows:
wherein R is 1 And R is 2 Selected from-H, -OH, -OOCCH 3 And R is 1 And R is 2 With only-H and-OH, -H and-OOCCH present therebetween 3 Two combination modes; n is n 1 And n 2 The sum is less than 1000. The hydroxyl number in the polyvinyl alcohol accounts for the ratio OH/(R) 1 +OH) or OH/(R) 2 +OH) is 80 to 90%, more preferably 82 to 88%. Most preferably, the polyvinyl alcohol is of type 0588, type 0585, type 0888 or type 0885. Wherein, 0588 type represents polymerization degree of 500 and alcoholysis degree of 88%; type 0585 represents a degree of polymerization of 500 and an alcoholysis degree of 85%;0888 type represents a degree of polymerization of 800 and an alcoholysis degree of 88%; type 0885 represents a degree of polymerization of 800 and an alcoholysis degree of 85%.
Preferably, the mildew preventive is selected from one or more of calcium propionate, sodium benzoate, sodium diacetate, potassium sorbate, dimethyl fumarate, methyl parahydroxybenzoate, methyl benzimidazole carbamate, n-octyl-4 isothiazolin-3-one, 3-iodo-2 propargyl butylcarbamate, 4,5 dichloro-2-n-octyl-4 isothiazolin-3-one; and preferably one or more of calcium propionate, methyl parahydroxybenzoate, n-octyl-4 isothiazolin-3-one, 4,5 dichloro-2-n-octyl-4 isothiazolin-3-one; further preferred are calcium propionate and n-octyl-4 isothiazolin-3-one.
The bacteriostat has a halogenated phenol structure, and the molecular structure is as follows:
wherein each X is independently selected from chlorine or bromine, a is 1, 2 or 3; each Y is independently selected from C1-C4 alkyl or halophenoxy, and b is 1, 2 or 3. Preferably, the bacteriostat is selected from one or more of 5-chloro-2- (2, 4-dichlorophenoxy) phenol, chloroxylenol and 5-chloro-2- (4-chlorophenoxy) phenol. Further preferred is 5-chloro-2- (4-chlorophenoxy) phenol, which may be available under the trade name TinosanHP100 from BASF.
Preferably, the filler is selected from one or more of alpha-cyclodextrin, beta-cyclodextrin, carboxymethyl cellulose, hydroxypropyl methylcellulose and microcrystalline cellulose; further preferred is one or more selected from the group consisting of beta-cyclodextrin, hydroxypropyl cellulose and microcrystalline cellulose.
The antibacterial mildew-proof cat litter comprises the following components in percentage by mass: 40-80% of plant fiber, 10-25% of corn starch, 2-10% of guar gum, 4-12% of antibacterial mildew inhibitor, 1-5% of active carbon, 1-5% of bentonite, 1-5% of zeolite powder, 0-1% of graphene, 0-1% of mesoporous silicon and 0-0.5% of essence.
Preferably, the plant fiber is selected from one or more of pea fiber, soybean fiber, bamboo fiber, coffee grounds, fruit wood fiber, chestnut wood fiber, walnut wood fiber, corn stalk, peanut shell fiber and pulp fiber.
A preparation method of antibacterial mildew-proof cat litter comprises the following steps:
(1) Pretreatment: placing polyvinyl alcohol into water at 55-70 ℃, stirring until the polyvinyl alcohol is clarified, gradually adding a bacteriostatic agent and a mildew preventive, and obtaining a premix after dissolving;
(2) Adding filler into the premix, drying, and pulverizing to above 100 mesh to obtain antibacterial mildew inhibitor;
(3) Mixing plant fiber, corn starch, guar gum, activated carbon, bentonite, zeolite powder, graphene, mesoporous silicon and essence, stirring uniformly, adding antibacterial and mildew-proof powder during stirring, and mixing uniformly;
(4) And transferring the obtained mixed material to a storage bin at 70-75 ℃, extruding particles for molding, and drying at 80-85 ℃ to obtain the antibacterial mildew-proof cat litter.
A bi-component cat litter product comprises antibacterial and mildew-proof cat litter and cat litter deodorizing powder.
The cat litter deodorizing powder comprises the following components in percentage by mass: 60-95% of carbonate and/or bicarbonate, 5-40% of silicon dioxide, 0-10% of adhesive and 0-10% of other auxiliary agents. Further preferred are: 70-90% of carbonate and/or bicarbonate, 10-30% of silicon dioxide, 2-7% of adhesive and 0-10% of other auxiliary agents; wherein, part of the carbonate and/or bicarbonate is loaded in the silicon dioxide, the loading is 60-80% of the silicon dioxide, and the pH of the 1% aqueous solution of the cat litter deodorizing powder composition is 7-9.
Preferably, the silica is activated to have an average particle diameter of 30 to 120 meshes and a specific surface area of 200 to 350m 2 Per gram, the oil absorption value is 170-280 mL/100g; the carbonate is one or two of sodium carbonate and potassium carbonate; the bicarbonate is one or two of sodium bicarbonate and potassium bicarbonate; the adhesive at least comprises a polysaccharide adhesive, and further comprises one or more of guar gum, xanthan gum, locust bean gum, sesbania gum and other galactomannan plant gum; other auxiliary agents comprise essence, nanometer zinc oxide, nanometer silver oxide, nanometer titanium dioxide, nanometer silver antibacterial agent, probiotic deodorant, white oil and chlorineOne or more of m-xylenol, benzisothiazolinone, and other functional adjuvants.
The preparation method of the cat litter deodorizing powder composition comprises the following steps:
step 1): the silicon dioxide is heated and activated (200-300 ℃ C., 2-5 hours).
Step 2): preparing 8-35 wt% saturated inorganic salt water solution of partial carbonate and/or bicarbonate, adding activated silica, soaking for 24-36 hr, vacuum drying, heating to activate for 2-5 hr at 200-300 deg.c, and cooling to obtain inorganic salt @ silica powder.
Step 3): and (3) weighing the inorganic salt@silicon dioxide powder obtained in the step (2) to obtain the loaded inorganic salt load, and fully mixing the inorganic salt@silicon dioxide powder with the rest of carbonate and/or bicarbonate, a binder and other auxiliary agents through a mixer to obtain the cat litter deodorizing powder composition in the form of a powder mixture. Preferably, the mixer is a stirring mixer, a coulter mixer, a gravity-free mixer, a V-type mixer or a three-dimensional oscillating mixer.
Test method
< antibacterial Property test >
1. The cat litter was cut into 10mm length samples for use.
2. Preparation of the medium with bacteria, weighing 25g of tryptone soybean agar medium, coagulating, and sucking 1ml of Staphylococcus aureus bacterial liquid (10) 6 cfu/ml) on the culture medium, shaking the culture dish back and forth to completely and uniformly cover the bacterial liquid on the surface, and drying for 15min for later use.
3. The cat litter sample in step 1 was placed on the surface of the medium with bacteria and cultured at 37℃for 24 hours. The diameter of the inhibition ring (including the cat litter diameter) was measured with a vernier caliper and recorded, and the test was repeated 3 times to average.
< test of mildew resistance >
1. Preparing aspergillus niger spore suspension: sucking 10ml of PBS solution containing 0.05% Tween 80, adding into Aspergillus niger culture for 6d, washing spores with sterile cotton swab, filtering spore spinning solution with sterile gauze to remove mycelium, and fixing spore suspensionTo 40ml, giving about 10 6 Spore suspension with concentration is diluted 100 times by PBS to prepare 10 4 Spore suspension at concentration was ready for use.
2. Inoculating: adding cat litter into a sterile plate by using sterile forceps, uniformly dripping spore suspension on the surface of the cat litter by using a liquid-transferring gun, covering a plate cover, sealing by a sealing film to keep humidity, placing the cat litter in a constant temperature and humidity box with the humidity of 85% at 32 ℃ for culturing for 48 hours, and then observing the result.
3. Mold resistance evaluation criteria:
| grade | Results |
| A | No Aspergillus niger growth was observed |
| B | Sporadic point mould growth was observed |
| C | Significant growth of Aspergillus niger was observed |
< test of caking Strength >
Spreading cat litter sample in a sample basin to a thickness of about 8-10cm, sucking 20mL of 1% sodium chloride solution with a temperature of 36-40 ℃ by a pipette (pipette or other measuring device), transferring into a buret with a plug, adjusting the buret to ensure that the liquid outlet is about 3cm away from the sample plane, opening the buret to ensure that the solution flows out at the highest speed, taking out the agglomerated sample after the solution is totally discharged for 60s, weighing gram weight m, freely falling to marble or other inelastic table surfaces from the height of 60cm, and picking up the maximumWeighing m of block cat litter 1 The calculation formula of the agglomeration intensity is as follows:
wherein:
q-agglomerate strength (%);
m 4 -mass of maximum agglomerate (g);
m-the gram weight (g) of the agglomerate before falling.
The formulation of each example/comparative example, the preparation method of cat litter and the evaluation result are as follows:
< test of caking speed >
10g of cat litter sample to be measured is taken and placed in a 100mL glass measuring cup, 20mL of warm water at 40 ℃ is dripped into the cup at a constant speed by using a separating funnel, and the time required for complete water suction is recorded from the end of dripping (complete suction means inverted beaker without water dripping). The test was performed three times to average.
Examples 1 to 6
The antibacterial mildew preventive ingredients of examples 1 to 6 are shown in Table 1 according to 100 parts by weight;
table 1 composition of antibacterial and mildew-proof agent components of examples 1 to 6
Examples 1-6 preparation method of antibacterial and mildew-proof cat litter
Preparation of antibacterial mildew preventive: taking example 1 as an example, adding according to the above proportion, taking 3 parts of 0588 type polyvinyl alcohol to 93.25 parts of pure water, heating to 60 ℃ and stirring until clear. Adding 0.5 part of n-octyl-4 isothiazolin-3-ketone and 0.25 part of 5-chloro-2- (4-chlorophenoxy) phenol, and after complete dissolution; and continuously adding 3 parts of beta-cyclodextrin, stirring until the mixture is uniform, drying the mixture at 85 ℃ for 8 hours, and crushing the dried mixture to reach the requirement of 100 meshes to obtain the antibacterial mildew inhibitor powder. The preparation methods of examples 2 to 5 are the same as in example 1.
Preparation of cat litter: mixing 40 parts of pea fiber, 25 parts of soybean fiber, 15 parts of corn starch, 5 parts of guar gum, 2 parts of activated carbon, 2 parts of bentonite, 2 parts of zeolite powder, 0.5 part of graphene, 0.4 part of mesoporous silicon and 0.1 part of essence, uniformly stirring, adding 8 parts of antibacterial mildew inhibitor in the stirring process, transferring to a 75 ℃ storage bin, extruding to form granules, and drying the obtained cat litter granules at 85 ℃ to finally obtain the cat litter with mildew-proof and deodorizing functions.
The test results were as follows:
TABLE 2 cat litter performance test results
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Diameter/mm of inhibition zone | 33.4 | 32.0 | 33.0 | 32.2 | 31.8 | 32.7 |
| Mildew resistance | A | A | A | A | A | A |
| Agglomerate strength/% | 92.5 | 91.0 | 92.4 | 92.1 | 91.2 | 91.7 |
| Agglomeration speed/s | 9.3 | 8.5 | 8.6 | 8.9 | 9.2 | 8.5 |
As can be seen from the above table and FIGS. 1 and 2, the cat litters finally prepared in examples 1-6 all had good antibacterial and mildewproof properties, and the water absorption and the caking strength of the cat litters were good.
Examples 7 to 10, comparative examples 1 to 2
Table 3 examples 7 to 10, comparative examples 1 to 2, antibacterial and mildew preventive compositions
Preparation method of antibacterial mildew-proof cat litter of examples 7-10 and comparative examples 1-2
Preparation of antibacterial mildew preventive: taking example 7 as an example, the above proportions were used to add 3 parts of 0588 type polyvinyl alcohol to 91.25 parts of pure water, heated to 70 ℃ and stirred until clear. Adding 0.5 part of n-octyl-4 isothiazolin-3-ketone and 0.25 part of 5-chloro-2- (4-chlorophenoxy) phenol, and after complete dissolution; and continuously adding 5 parts of beta-cyclodextrin, stirring to be uniform, drying at 80 ℃ for 8 hours, and crushing the dried product to reach the requirement of 100 meshes to obtain the antibacterial mildew inhibitor powder. The preparation methods of the antibacterial mildewcides of examples 8 to 10 and comparative examples 1 to 2 are the same as those of example 7.
Preparation of cat litter: 26 parts of pea fibers, 17 parts of corn stalks, 12 parts of soybean fibers, 12 parts of coffee grounds, 12 parts of corn starch, 5 parts of guar gum, 2.5 parts of activated carbon, 2 parts of bentonite, 1.2 parts of zeolite powder, 0.1 part of graphene, 0.1 part of mesoporous silicon and 0.1 part of essence are uniformly mixed and stirred, 10 parts of antibacterial mildew inhibitor are added in the stirring process, and after being transported to a 75 ℃ storage bin, extruded particles are molded, and the obtained cat litter particles are dried at 85 ℃ to finally obtain cat litter with mildew prevention and deodorization functions.
The test results were as follows:
TABLE 4 cat litter performance test results
| Example 7 | Example 8 | Example 9 | Example 10 | Comparative example 1 | Comparative example 2 | |
| Diameter/mm of inhibition zone | 33.2 | 33.7 | 32.0 | 32.6 | 30.4 | 29.5 |
| Mildew resistance | A | A | A | A | A | A |
| Agglomerate strength/% | 92.9 | 92.1 | 92.6 | 91.8 | 78.5 | 81.3 |
| Agglomeration speed/s | 8.3 | 8.4 | 8.0 | 8.5 | 12.5 | 11.8 |
From the above table, it can be found that the cat litter prepared in examples 7 to 10 is excellent in performance, and the performance of the cat litter prepared by combining different mildew inhibitors and bacteriostats is still better; the comparative examples 1 to 2 show that the polyvinyl alcohol with higher polymerization degree has obvious decrease of the agglomeration strength and the agglomeration rate in the same water absorption time; it is presumed that the possible cause is that the water dissolution rate of the polyvinyl alcohol of higher polymerization degree is lowered and that exposure of the partially hydrophobic group to the outside causes a certain water repellency.
Examples 11 to 14, comparative examples 3 to 4
Table 5 composition of antibacterial and antifungal agents of examples 11 to 14, comparative examples 3 to 4
Preparation method of antibacterial mildew-proof cat litter of examples 11-14 and comparative examples 3-4
Preparation of antibacterial mildew preventive: taking example 11 as an example, the above ratio was used to add 3 parts of 0588 type polyvinyl alcohol to 93.25 parts of pure water, heated to 70 ℃ and stirred until clear. Adding 0.5 part of n-octyl-4 isothiazolin-3-ketone and 0.25 part of 5-chloro-2- (4-chlorophenoxy) phenol, and after complete dissolution; and continuously adding 3 parts of hydroxypropyl cellulose, stirring to be uniform, drying at 80 ℃ for 8 hours, and crushing the dried product to reach the requirement of 100 meshes to obtain the antibacterial mildew preventive powder. The antibacterial and antifungal agents of examples 11 to 14 and comparative examples 3 to 4 were prepared in the same manner as in example 7.
Preparation of cat litter: 28 parts of pea fibers, 18 parts of corn stalks, 14 parts of soybean fibers, 13 parts of coffee grounds, 12 parts of corn starch, 5 parts of guar gum, 2.5 parts of activated carbon, 2 parts of bentonite, 1.2 parts of zeolite powder, 0.1 part of graphene, 0.1 part of mesoporous silicon and 0.1 part of essence are uniformly mixed and stirred, 4 parts of antibacterial mildew inhibitor are added in the stirring process, and after being transported to a 75 ℃ storage bin, extruded particles are molded, and the obtained cat litter particles are dried at 85 ℃ to finally obtain cat litter with mildew prevention and deodorization functions.
The test results were as follows:
TABLE 6 cat litter performance test results
From the results of examples 11-14 in the table above, it is found that under the condition that the addition ratio of the antibacterial mildew inhibitor is small, the antibacterial mildew resistance and caking property of the cat litter are still better; meanwhile, the comparative examples 3-4 show that the performance is general (shown in figures 1 and 2), and when the addition amount of the bacteriostatic agent and the mildew preventive is too large, the polyvinyl alcohol can not be well emulsified and wrapped, so that the problem of uneven mixing in the preparation process of cat litter can cause the mildew preventive to be reduced. Meanwhile, when the addition amount of the polyvinyl alcohol is excessive and the addition amount of the antibacterial mildew inhibitor is too low, the performance is poorer.
Examples 15 to 17, comparative examples 5 to 7
Table 7 composition of antibacterial mildew preventive of examples 15 to 17 and comparative examples 5 to 7
Preparation method of antibacterial mildew-proof cat litter of examples 15-17 and comparative examples 5-7
Preparation of antibacterial mildew preventive: examples 15 to 17 were prepared in the same manner as in the above examples; comparative examples 5 to 7 were each prepared without adding polyvinyl alcohol or 4, 5-dichloro-2-n-octyl-4-isothiazolin-3-copper or chlorodimethylphenol.
Preparation of cat litter: mixing and uniformly stirring 25 parts of corn straw, 20 parts of fruit wood fiber, 15 parts of corn starch, 12 parts of bamboo fiber, 10 parts of pea fiber, 8 parts of guar gum, 2 parts of active carbon, 1 part of bentonite, 0.8 part of zeolite powder and 0.2 part of essence, adding 6 parts of antibacterial mildew inhibitor in the stirring process, transferring to a 75 ℃ storage bin, extruding and forming particles, and drying the obtained cat litter particles at 85 ℃ to finally obtain the cat litter with mildew-proof and deodorizing functions.
The test results were as follows:
TABLE 8 cat litter performance test results
From the above table, it can be seen that the cat litter prepared in examples 15 to 17 is excellent in performance; meanwhile, according to comparative example 5, the cat litter without adding polyvinyl alcohol has obviously reduced antibacterial performance and mildew-proof performance (shown in figures 1 and 2), and the performance is reduced due to uneven mixing of the antibacterial mildew inhibitor. The comparative examples 6 to 7 show that the performance is obviously reduced without adding mildew inhibitor or bacteriostatic agent; the water absorption performance and the caking strength show little difference.
Examples 18 to 20
Table 9 cat litter and deodorant powder combination examples
The preparation method of the antibacterial mildew inhibitor and cat litter comprises the following steps: as in the above embodiment
The preparation method of the deodorant powder comprises the following steps:
placing silicon dioxide in a muffle furnace for activation at 200 ℃ for 2 hours; preparing bicarbonate with 80% of silicon dioxide weight into 8% aqueous solution, adding activated silicon dioxide, soaking for 24h, filtering, vacuum drying, activating at 200deg.C in a muffle furnace for 3 hr, and cooling in a dryer to obtain bicarbonate/carbonate/silicon dioxide solid. And finally, adding the obtained solid, the residual bicarbonate, guar gum, nano zinc oxide and essence into a stirring mixer for fully mixing.
< test of caking Strength >
When the antibacterial mildew-proof cat litter is matched with the deodorant powder for use, the cat litter is tiled to be 8-10cm thick, and then 100g of the deodorant powder is added to tile the upper surface of the cat litter. The subsequent test method is the same as above.
< test of deodorizing Property >
Taking the composition of the cat litter and the deodorant powder as a test sample, tiling the cat litter to be 8-10cm thick, and then adding 100g of the deodorant powder to tiling the upper surface of the cat litter; then adding 2g of cat urine odor source into the cat litter box, and aging for 7 days.
During the aging process, 10 odor assessment panelists were asked to conduct subjective olfactory assessment of the odor daily, with the assessment criteria as shown in table 10. And finally adding all the fractions to average, namely, regarding the comprehensive deodorizing effect of the product.
TABLE 10 sensory evaluation criteria for deodorizing effect
| Scoring of | Scoring criteria |
| 1 | The odor is very strong |
| 2 | Strong odor |
| 3 | The odor is more concentrated |
| 4 | Has obvious odor |
| 5 | The odor is light |
| 6 | Light smell |
| 7 | No smell of smell |
The test results were as follows:
table 11 test results of performance of cat litter and deodorant powder
According to the embodiment, the antibacterial mildew-proof cat litter and the deodorizing powder are matched for use, and the test results of the agglomeration strength and the deodorizing effect show that the deodorizing powder composition has little influence on the agglomeration performance of the antibacterial mildew-proof cat litter; the deodorizing effect was excellent, and in particular, in example 20, the deodorizing effect was further improved by containing cat litter made of coffee grounds and corn stalks.
The raw materials and equipment used in the invention are common raw materials and equipment in the field unless specified otherwise; the methods used in the present invention are conventional in the art unless otherwise specified.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent transformation of the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. A bacteriostatic and mildew-proof agent, which is characterized in that: comprises a mildew inhibitor and a bacteriostatic agent wrapped by polyvinyl alcohol and a filler; wherein the weight ratio of the polyvinyl alcohol to the mildew inhibitor to the bacteriostatic agent is (10-20) to (1-2.5) to 1, and the weight ratio of the polyvinyl alcohol to the filler is 1:1/2-1:2.
2. A bacteriostatic mildew inhibitor according to claim 1, wherein: the weight ratio of the polyvinyl alcohol to the antibacterial agent to the mildew preventive is (10-18) to (1-2.5) to 1.
3. A bacteriostatic mildew inhibitor according to claim 2, wherein: the weight ratio of the polyvinyl alcohol to the bacteriostatic agent to the mildew preventive is (12-18) to (1.5-2.5) to 1.
4. A bacteriostatic mildew inhibitor according to any one of claims 1-3, wherein: the molecular structure of the polyvinyl alcohol is as follows:
wherein R is 1 And R is 2 Selected from-H, -OH, -OOCCH 3 And R is 1 And R is 2 With only-H and-OH, -H and-OOCCH present therebetween 3 Two combination modes; n is n 1 And n 2 The sum is less than 1000.
5. The bacteriostatic mildew preventive according to claim 4, wherein: the hydroxyl group number in the polyvinyl alcohol accounts for the ratio OH/(R) 1 +OH) or OH/(R) 2 +OH) is 80-90%.
6. A bacteriostatic mildew inhibitor according to any one of claims 1-3, wherein:
the mildew preventive is one or more selected from calcium propionate, sodium benzoate, sodium diacetate, potassium sorbate, dimethyl fumarate, methyl parahydroxybenzoate, methyl benzimidazole carbamate, n-octyl-4 isothiazolin-3-one, 3-iodo-2 propargyl butyl carbamate and 4,5 dichloro-2-n-octyl-4 isothiazolin-3-one;
the bacteriostat has a halogenated phenol structure, and the molecular structure is as follows:
wherein each X is independently selected from chlorine or bromine, a is 1, 2 or 3; each Y is independently selected from C1-C4 alkyl or halophenoxy, b is 1, 2 or 3;
the filler is one or more selected from alpha-cyclodextrin, beta-cyclodextrin, carboxymethyl cellulose, hydroxypropyl methylcellulose and microcrystalline cellulose.
7. The utility model provides a antibacterial mould proof cat litter which characterized in that: comprises the following components in percentage by mass: 40-80% of plant fiber, 10-25% of corn starch, 2-10% of guar gum, 4-12% of antibacterial mildew preventive as claimed in any one of claims 1-6, 1-5% of activated carbon, 1-5% of bentonite, 1-5% of zeolite powder, 0-1% of graphene, 0-1% of mesoporous silicon and 0-0.5% of essence.
8. The bacteriostatic, mildewproof cat litter of claim 7, wherein: the plant fiber is one or more selected from pea fiber, soybean fiber, bamboo fiber, coffee grounds, fruit wood fiber, chestnut wood fiber, walnut wood fiber, corn stalk, peanut shell fiber and paper pulp fiber.
9. A method of preparing the bacteriostatic and mildewproof cat litter of claim 7 or 8, comprising:
(1) Pretreatment: placing polyvinyl alcohol into water at 55-70 ℃, stirring until the polyvinyl alcohol is clarified, gradually adding a bacteriostatic agent and a mildew preventive, and obtaining a premix after dissolving;
(2) Adding the filler into the premix, drying and crushing to obtain the antibacterial mildew inhibitor;
(3) Mixing plant fiber, corn starch, guar gum, activated carbon, bentonite, zeolite powder, graphene, mesoporous silicon and essence, stirring uniformly, adding antibacterial and mildew-proof powder during stirring, and mixing uniformly;
(4) And extruding the obtained mixture to form particles, and drying to obtain the antibacterial mildew-proof cat litter.
10. A two-component cat litter product comprising:
independently packaged antibacterial and mildew-proof cat litter of claim 7 or 8 or obtained by the preparation method of claim 9;
independently packaged cat litter deodorizing powder; comprises the following components in percentage by mass: 60-95% of carbonate and/or bicarbonate, 5-40% of silicon dioxide, 0-10% of adhesive and 0-10% of other auxiliary agents; wherein part of the carbonate and/or bicarbonate is/are loaded in the silicon dioxide, and the loading is 60-80% of the silicon dioxide.
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