JP2531593B2 - Absorbent material for pet toilet - Google Patents

Description

TECHNICAL FIELD The present invention relates to an absorbent material for pet toilets such as cats and dogs.

(Prior Art) When pets such as cats and dogs are kept indoors, a toilet in which sand is put in an appropriate container such as a box is often used as a pet toilet. As a conventional absorbent material for pet toilets, bentonite-based, zeolite-based mineral sand, pulp and the like have been used. However, mineral sand is heavy and inconvenient to carry, and there is a problem in that used sand cannot be flushed to the flush toilet and it is troublesome to dispose of it. Further, the paper-based absorbent material such as pulp has a weak deodorizing power, is difficult to remove a bad odor, and is lightweight and easily dissipated.

(Problems to be Solved by the Invention) In view of the above-mentioned drawbacks of the existing pet toilet sand and absorbent material, the present inventor has completed the present invention as a result of continuing intensive research, The purpose of the present invention is to provide an absorbent material for pet toilets which is lightweight, highly absorbent, has a property of absorbing and coagulating manure, and which is swollen or dissolved by a large amount of water and can be flow-down processed in a flush toilet. . Other objects and effects of the present invention will be apparent from the following description.

(Means for Solving the Problems) The above-mentioned object is to absorb the surface of the cereal foam with a hydrophilic resin containing a deodorant / antibacterial agent, as well as the surface of the cereal foam. , A vinyl acetate / crotonic acid copolymer resin containing metal zeolite and barium sulfate.

The cereal foam applied to the present invention includes millet, rice, soybean,
It means a popcorn-shaped product obtained by heating and exploding cereals such as cultivar and jade corn, and as the cereal raw material, old ones and scraps can be sufficiently used. These cereal foams are light in weight, have high water absorption, swell when they absorb water, and can be flushed with a flush toilet. However, it was too light and was thrown away by pets,
In addition to being easily scattered, it does not have a deodorizing effect, and the smell around the toilet bowl is unavoidable. It is necessary to add a deodorant / antibacterial agent to the cereal foam in order to impart a deodorant / antibacterial effect to the cereal foam and increase its specific gravity.
Although various kinds of deodorant / antibacterial agents can be considered, preferable results can be obtained by using a metal zeolite.

The metal zeolite used in the present invention is preferably one in which a metal having a deodorant and antibacterial action is supported in an ionic state on a porous zeolite. These metal zeolites can be easily obtained, for example, by the method described in JP-B-63-28402.

The zeolite forming the metal zeolite skeleton is generally an aluminosilicate having a three-dimensional skeleton structure, and the aluminosilicate is represented by, for example, the following formula.

xMnO ・ Al ₂ O ₃・ ySiO ₂・ zH ₂ O Many modifications of zeolite are known due to differences in the composition ratio, pore size, specific surface area, etc. of the monovalent or divalent metal substituted in the metal oxide and its oxide. The zeolite has a specific surface area of 150 m ² / g or more based on the weight of the anhydrous zeolite component excluding water of crystallization, and a molar ratio of silicon oxide to aluminum oxide SiO ₂ / Al ₂ O ₃ is 14 or less. What is preferable. In the present invention, natural zeolite or synthetic zeolite may be used as the zeolite. As natural zeolites, there are arsine, chabaside, clinobutilolite, erionite, faujasite, mordenite, phillipsite, etc., and as synthetic zeolites, A-type zeolite, X-
Type zeolite, Y-type zeolite, mordenite, etc. may be mentioned, and these zeolites may be used alone or in combination. Of these, A-type zeolite, X-type zeolite, and Y-type zeolite are particularly preferable, and natural mordenite can be mentioned as a material that follows them.

The shape of the zeolite used in the present invention is preferably powdery particles, and the particle diameter is preferably 50 μm or less, more preferably 0.5 μm or more and 20 μm or less. The zeolite used in the present invention has one or more kinds of metal ions retained in the natural or synthetic zeolite as described above. Specifically, the metal ion of the metal oxide in the zeolite is replaced by the metal ion. As the metal used as a preferable metal ion in the present invention, copper, silver, zinc,
Examples include nickel and tin. These may be used alone or in combination. The amount of metal ions contained in the zeolite is preferably 30% by weight or less for silver ions, and preferably 35% for copper or zinc ions, based on the total weight of anhydrous zeolite excluding water of crystallization.
% By weight or less. These metal ions may be used alone or in combination. When used in combination, the proportion of metal ions is preferably 35% by weight or less based on the total weight of zeolite, calculated as anhydrous zeolite excluding water of crystallization. It does not matter if the substituted metal ion also contains another metal ion.

Further, in the present invention, a deodorant / antibacterial agent is added to the grain foam,
Examples of the hydrophilic resin that is applied to fix a high-density agent or the like, and at the same time, to absorb the water of pet excrement and to give a solidifying effect include, for example, dextrin, carboxy,
Starch and starch derivatives such as methyl starch and cyanoethylated starch, polyvinyl alcohol (PVA), polyvinyl alcohol resins such as acrylamide modified PVA and acrylic modified PVA, vinyl resins such as vinyl acetate and polyvinyl methyl ether, acetic acid Vinyl-based copolymer resins such as vinyl-acrylic acid copolymer, vinyl acetate-crotonic acid copolymer, acidic vinyl-maleic acid copolymer, vinyl acetate-ethylene copolymer, styrene-maleic acid copolymer,
Acrylic resins such as polyacrylic amide, polyacrylic acid soda, polymethacrylic acid, polymethacrylic acid soda, acrylic acid ester / acrylonitrile copolymer, and partially saponified polyacrylic acid ester can be used. The vinyl acetate crotonic acid copolymer resin is most preferable because it is harmless. These hydrophilic resins are used after being dissolved or dispersed in a solvent such as water or alcohol.

Since the cereal foam used in the present invention has a low specific gravity, it easily scatters when it is scattered by a pet, and therefore a large specific gravity substance that does not harm the pet such as copper sulfate is used for the purpose of increasing the specific gravity of the absorbent material. Is preferred. To produce the absorbent material for a pet toilet of the present invention using these raw materials,
Grains such as millet, millet, rice, sycamore, beans, etc. are put into a foaming machine, pressurized and heated, and then rapidly depressurized to foam the raw grains. An antibacterial / deodorant, a high specific gravity material, etc. are mixed with a hydrophilic resin and uniformly dispersed to prepare a resin processing agent liquid. At this time, the hydrophilic resin may be appropriately blended with a coloring agent such as titanium oxide, a solidifying agent and the like additives which are usually blended with this type of pet manure absorbing material. Next, the resin processing liquid is applied to the grain foam. Although various methods such as impregnation, spraying and coating can be considered as the application method, the application is usually performed by coating. Subsequently, the grain to which the hydrophilic resin has been applied is dried by heating.

(Advantages of the Invention) The absorbent material of the present invention is lightweight and easy to carry, absorbs water in manure and hardens, and can be flushed to a flush toilet, so that it is clean and easy to dispose of. Further, since the absorbent material contains a deodorant / antibacterial agent, it has an advantage that it quickly adsorbs an odor derived from pet excrement and does not cause a bad odor to flow around.

The present invention will be specifically described below with reference to examples. In the examples, "part" means "part by weight".

Example 1 5 parts of vinyl acetate / crotonic acid copolymer resin (RESYN 28-1310 manufactured by Kanebo USC) was dissolved in 65 parts of ethyl alcohol, and 70 parts of barium sulfate and deodorant / antibacterial agent (Kanebo (stock) ) Bactekiller BM-101A) 0.3
And 3 parts of titanium oxide were mixed and dispersed uniformly. Awa foam (Suzuka Sangyo Co., Ltd. pop millet specific gravity 0.08) 100
Parts and the above resin dispersion were put into a Nauta mixer and stirred, and the resin dispersion was permeated into the millet foam and dried at 90 ° C. for 3 hours. The specific gravity of the absorbent after drying was 0.16.

Example 2 5 parts of modified polyacrylic acid ester copolymer resin (A-HW-7 manufactured by Taisei Kayaku Co., Ltd.) was dissolved in 120 parts of ethyl alcohol, and 47 parts of barium sulfate and a deodorant / antibacterial agent were added to the solution. 0.5 parts (Bactekiller BM-102A manufactured by Kanebo Co., Ltd.), 81 parts bentonite powder as a coagulant, and 5 parts titanium oxide were mixed and uniformly dispersed. 100 parts of millet foam (Suzuka Sangyo Co., Ltd. pop millet specific gravity 0.08) and 260 parts of the above resin dispersion are put into a Nauta mixer and stirred, and after the resin dispersion is penetrated into the millet foam, 90 ° C. And dried for 2 hours.
After drying, the processed product was taken out from the mixer to obtain an absorbent material having a specific gravity of 0.58.

With respect to the absorbent material of the present invention obtained in Examples 1 and 2 above, the water absorption and deodorant property were measured by the following methods. The results are shown in Tables 1 and 2.

Measuring method of water absorption rate: -A glass cylindrical container having a mesh filter bottom is filled with 250 cm ³ of a sample, 25 ml of tap water collected by a pipette is dropped, and the amount of water (g) flowing through the mesh filter bottom is measured. The water absorption rate per sample weight and the water absorption rate were calculated by the formula.

Method for measuring deodorizing ability: -A) 10 μm of 28% ammonia water was sampled in a 300 ml Erlenmeyer flask of ammonia, and after completely gasifying, 100 cm ^{3 of} the sample (Example 1, 2 prototype) was put and stored at 25 ° C. Then, after a lapse of a predetermined time, the residual concentration of ammonia in the flask was measured using a Kitagawa gas detector.

B) To a 300 ml Erlenmeyer flask of trimethylamine, 10 μ of 0.6% trimethylamine aqueous solution was sampled and completely gasified, and then 100 cm ^{3 of} the sample (Examples 1 and 2 prototypes) was added and stored at 25 ° C. for a predetermined time. After a lapse of time, the residual concentration of trimethylamine in the flask was measured using a Kitagawa gas detector.

Claims (2)

(57) [Claims] 1. An absorbent material for pet toilets, which is obtained by coating the surface of a grain foam with a hydrophilic resin containing a deodorant / antibacterial agent. 2. An absorbent material for pet toilets, characterized in that the surface of a grain foam is coated with a vinyl acetate / crotonic acid copolymer resin containing metal zeolite and barium sulfate.