CN101672799A - Cat urine pH indicating material, pH indicating silica gel cat sand and preparation method thereof - Google Patents
Cat urine pH indicating material, pH indicating silica gel cat sand and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a pH indicating material, prepared pH indicating silica gel cat sand and a production method thereof, wherein the pH indicating material can indicate whether a pH value of peturine is within a normal range. The silica gel cat sand containing the pH indicating material is a mixture of the pH indicating material and basic silica gel, wherein the pH indicating material accounts for 1-15 percent of the gross weight of the mixed silica gel cat sand, the pH indicating material uses silica gel as a carrier and contains a pH mixed indicator accounting for 0.025-2 percent of the gross weight of the pH indicating material and a water soluble polymer accounting for 0.5-20 percent of the gross weight of the pH indicating material, and the proportion by weight of methyl red and bromothymol blue in the pH mixed indicator is 1:12-1:1. Because the consistency of the pH indicating material and the basic silica gel in the materials is ensured, the pH indicating material in catsand products is uniformly distributed and can sensitively and stably indicate the acidity-basicity of the cat urine. The pH indicating material has low production cost, no toxin, no radioactivity, simple and easy preparation process as well as attractive appearance and color.
Description
Technical field
The present invention relates to a kind of can indicate pet (especially cat) urine pH value whether pH indication material and the pH within normal range indicate silica gel cat litter and production method thereof.
Background technology
Discover that according to domestic and international zooscopy mechanism the normal urine of cat is weakly acidic, the pH value is between 5.5-7.5.Many urine pH values of suffering from the cat of disease depart from normal range and turn to acidity or alkalescence.The common cause that cat urine pH value is unusual is cat lower urinary tract disorders or cat urinary system syndrome.The higher urine of pH easily causes the formation of magnesium crystallization, and the urine that pH is on the low side easily causes the formation of calcium crystallization.So, can predict the health status of cat by check cat urine pH value, so that make pet owners to some disease of cat early prevention in addition.
U.S. Pat 6162646 provides a kind of basic cat litter material (as bentonitic clay), wherein added with foam of polymers (particularly isocyanurate foam) is the pH indication material of matrix material, be used for detection of acidic or alkaline cat urine, reach the purpose of prevention cat lower urinary tract disorders.European patent EP 0569232, a kind of cat litter of the pH of having deixis is disclosed, its composition is to have added in the bentonitic clay material by a kind of non-absorptive lime carbonate Dali flag, granite chippings or non-soluble polymer material (for example high crosslinking sodium polyacrylate) as matrix material, utilizes water-soluble polymers will play the dyestuff of pH indicative function and pH indication material that matrix material bonds.In this indication material, this patent particularly points out absorptive, the reflective inert carrier of the best right and wrong of matrix material, and the pH indicating dye can be wrapped up by water-soluble polymers at an easy rate like this, and remains on the outside surface of inert carrier (matrix) material; And if it is inner and cause waste to use absorptive matrix material, water-soluble polymers and solubility pH indicating dye will enter matrix material.Because what this patent recommended to use is non-water absorptivity matrix material, so water-soluble polymers plays after drying is the effect of adhesive coating, in order to the Stationary pH indicator dye.
More than two selected basic cat litters of patent are bentonitic clays, and the matrix of pH indication material is that to adopt plastic foam, high crosslinking sodium polyacrylate polymeric material or marble, granite chippings be carrier.Bentonitic shortcoming is can adhere on one's body the cat after urine is soaked, and can there be ion-exchange in bentonitic clay with urine, may influence the accuracy of pH indication.Though and polymeric material itself has the function of absorption cat urine, owing to be opaque, water-soluble polymers and/or solubility pH indicating dye will enter matrix material inside and cause waste.Though marble, grouan etc. have the stable advantage of chemical property,
But owing to itself can not adsorb urine, cat urine back urine can directly be penetrated on its a large amount of on every side bentonitic clay, and bentonitic clay conglomeration at once owing to absorb water, the pH indication material that quantitatively occupies the minority is wrapped up, influenced cat litter colour developing, color changeable effect on the whole, even have to take indicate material handwork to be sprinkling upon the way on cat litter surface pH, but do the problem of bringing like this is the urine that can bury oneself after cat drained once, and the pH that can make on the surface again indication material is buried the bentonitic clay the inside and causes waste.And the pH of above two patent disclosures indication material is different because of material with basic cat litter, and density is variant, can cause that pH indicates distribution of material inhomogeneous in the cat litter, has also influenced cat litter colour developing, color changeable effect on the whole.
Summary of the invention
Technical matters to be solved by this invention provides a kind of cat urine pH indication material and a kind of pH indication silica gel cat litter and preparation method thereof, and pH indication distribution of material is even in this cat litter product, the potential of hydrogen of indication cat urine that can be responsive, stable.
The invention provides a kind of cat urine pH indication material, it is characterized in that with silica gel being carrier, contain the pH mixed indicator that accounts for pH indication material general assembly (TW) 0.025-2% and the water-soluble polymers of 0.5-20%, wherein the weight ratio of methyl red and bromthymol blue is 1 in the pH mixed indicator: 12-1: 1.
Technical scheme of the present invention is:
The pH mixed indicator accounts for the 0.025-2% of pH indication material general assembly (TW), is preferably 0.04-1.5%; Water-soluble polymers accounts for the 0.5-20% of pH indication material general assembly (TW), is preferably 2.0-8.0%; The weight ratio of methyl red and bromthymol blue is 1 in the pH mixed indicator: 12-1: 1, be preferably 1: 10-1: 2.
Described water-soluble polymers adopts a kind of in polyvinylpyrrolidone, polyglycol, propylene glycol, glycerine or the polyvinyl alcohol (PVA) or two or more potpourri arbitrarily wherein.The preferred 2000-500000 of polyvinylpyrrolidone in the water-soluble polymers (PVP) weight average molecular weight range; The preferred 200-20000 of polyglycol (PEG) weight average molecular weight range, more preferably 200-1500; The preferred 1000-35000 of polyvinyl alcohol (PVA) (PVA) weight average molecular weight range.
Described carrier silica gel is common silica gel product.Preferred block silica gel, its average pore volume 0.5-1.8ml/g, bulk density 200-700g/L, granularity 0.5-8mm; More preferably pore volume 0.76-1.5ml/g, bulk density 400-600g/L, granularity 0.7-5mm.
The invention provides a kind of pH indication silica gel cat litter that utilizes aforementioned pH indication material preparation, it is characterized in that being made up of the potpourri of pH indication material and basic silica gel, wherein pH indication material accounts for the 1-15% of silica gel cat litter general assembly (TW), preferred 2-10%.
Described basic silica gel is common silica gel product, the preferred block silica gel that uses as cat litter, its average pore volume 0.5-1.8ml/g, bulk density 200-700g/L, granularity 0.5-8mm; More preferably pore volume 0.76-1.5ml/g, bulk density 400-600g/L, granularity 0.7-5mm.
Basic silica gel of the present invention with both can be identical on than pore structures such as table, pore volumes as the silica gel of carrier in the pH indication material, also can difference.It is the block silica gel of same specification that preferred employing is indicated the silica gel in the material with described pH.
When using the silica gel cat litter that contains pH indication material of the present invention, below 6.0, as 5.0, methyl red can become redness from yellow to problematic pet urine acid ph value about.What therefore, the outward appearance of a redness showed the cat drainage is problematic acid urine.Pet urine as problem is the alkaline pH value, shows that the uropoiesis syndrome may appear in cat, for example, when the pH value 7.5 to 8.0, bromthymol blue can become blueness or purple from yellow, adds yellow methyl red, and the pH mixed indicator will present green to purple.
A kind of method for preparing pH indication silica gel cat litter may further comprise the steps:
(a) methyl red, bromthymol blue and water-soluble polymer dissolves are made dip-dye solution in the mixed solution of second alcohol and water; Perhaps methyl red and bromthymol blue are dissolved in absolute ethyl alcohol or the alcoholic solution based on ethanol in advance, make the pH indicator solution, and with water-soluble polymer dissolves in water, again both are mixed, be mixed with dip-dye solution.
(b) will contaminate in the carrier silica gel immersion dip-dye solution, take out drying then, become pH indication material.Preferred immerged time is 0.5-20 hour, more preferably 2-8 hour.
(c) the pH indication material that (b) is made does not mix with there being treated basic silica gel, and wherein pH indication material accounts for the ratio of mixing silica gel and is preferably 1-15%, more preferably 2-10%.
In the above-mentioned steps (a), there is no particular limitation for the amount of the mixed solution of second alcohol and water, the absolute ethyl alcohol alcoholic solution of ethanol (or based on) and the consumption of water, as long as can make each auxiliary agent dissolving, be uniformly dispersed, and each adjuvant component is impregnated on the silica-gel carrier just equably, but consider that from the cost angle consumption of preferred absolute ethyl alcohol may be as few as just with two kinds of pH indicator dissolvings.In the dip-dye solution for preparing, the weight concentration of pH indicator is preferably 0.05-1wt%, more preferably 0.1-0.5wt%; The concentration of water-soluble polymers aqueous solution is preferably 1-10wt%, more preferably 2-5wt%.
The preparation method of silica gel cat litter of the present invention both can adopt above-mentioned steps, also can use solution impregnating carrier silica gel a period of time of water-soluble polymers earlier, and then adding pH indicator solution is contaminated, wherein use the time of water-soluble polymers solution impregnating carrier silica gel unimportant, can be from a few minutes to the several hrs, as long as can make water-soluble polymers pre-soaked in the silica gel part.This preparation method's effect is to make the pH indicator less enter into the internal void of carrier silica gel, can improve the susceptibility that develops the color when pH indication material runs into pet excrement.
PH indication silica gel cat litter of the present invention has overcome the deficiency that existing pH indicates cat litter, and carrier and basic cat litter in the pH indication material all adopt commaterial one silica gel, make both dispersions more even.And because the silica gel chemical property is stable, unlike bentonitic clay, has the character of significant ion-exchange, thereby can not disturb the pH value of cat urine, improved test accuracy.
The silica gel of pH in the silica gel cat litter of the present invention indication material water-soluble polymers that has been load and two kinds of pH indicator.Wherein a kind of indicator has significant change color when detecting pH value less than 5.6 solution, another kind of indicator has significant change color during greater than 7.4 solution in detection pH value.Especially be used to show that as the cat litter adjuvant cat urine is acid ph value (pH value is less than about 5.6 greatly), perhaps be used to indicate cat urinary system syndrome (cat urinate the pH value 7.4 or more than).
In this manner, when urine contacts with pH indication silica gel cat litter of the present invention, the pH indication material that will be evenly dispersed therein absorbs, and enters its inner pH mixed indicator and contact with loading on its surface and small part, thereby makes it to indicate the pH value of cat urine.The urine of different pH values can make pH indication material demonstrate different colors.Because silica gel itself is transparent, can form waste even entered into the pH mixed indicator of pH indication material silica-gel carrier yet, but can demonstrate change in color again by the refraction action of light.And because the water-soluble polymers among the present invention can make pH mixed indicator (dyestuff) be uniformly dispersed in solution on the one hand in the preparation, can also after indicating the material drying, pH form one deck Obstruct membrane on the other hand, can stop pH mixed indicator (dyestuff) further diffusion in the internal void of carrier silica gel, infiltration, making most pH indicator dyes all is the surface that loads on carrier silica gel, has increased the susceptibility of its colour developing.
Compare with the pH indication cat litter of prior art, the silica gel cat litter of the pH of containing indication material of the present invention has remarkable advantages.As previously mentioned, because it has guaranteed pH indication material support and the basic cat litter consistance at material, make that pH indication distribution of material is even in the cat litter product, the potential of hydrogen of indication cat urine that can be responsive, stable.Its low production cost, nontoxic, "dead", preparation is simple, and appearance luster is attractive in appearance.
Embodiment
By embodiment the present invention is described in detail below, but should be pointed out that these embodiment are used to explain the present invention, rather than limitation of the present invention.
Embodiment 1
With the 5kg pore volume is 0.91ml/g, bulk density is 386g/L, granularity is that the block silica gel of 0.7-1.5mm is put into the pH indicator dip-dye solution for preparing, it is methyl red and the bromthymol blue ethanolic solution (weight ratio of methyl red and bromthymol blue is 1/10) of 0.3wt% by 5L concentration that this pH indicator is contaminated solution, with 10L concentration be that the aqueous solution of the PEG-1500 of 6wt% forms, soak after 2 hours, dry moisture to 4wt% at 75 ℃, this pH indication material contains the mixed indicator of 0.1wt%, the PEG-1500 of 4wt%.The pH indication material that obtains and the silica gel of same size mix, and making the percent by weight of pH indication material is 5wt%, and the performance test data of silica gel cat litter sees Table 1:
Table 1
Embodiment 2
With the 3kg pore volume is 1.21ml/g, bulk density is 356g/L, granularity is that the block silica gel of 2-4mm is put into the pH indicator dip-dye solution for preparing, it is methyl red and the bromthymol blue ethanolic solution (weight ratio of methyl red and bromthymol blue is 1/6) of 0.9wt% by 4L concentration that this pH indicator is contaminated solution, with 5L concentration be that the aqueous solution of the PEG-200 of 9wt% forms, soak after 2 hours, dry moisture to 4wt% at 75 ℃, this pH indication material contains the mixed indicator of 0.4wt%, the PEG-200 of 5wt%.The pH that obtains indication material mixes with the silica gel of same size again, and making the percent by weight of pH indication material is 3wt%, and the performance test data of silica gel cat litter sees Table 2:
Table 2
Embodiment 3
With the 1kg pore volume is 0.97ml/g, bulk density is 364g/L, granularity is that the block silica gel of 5-8mm is put into the pH indicator dip-dye solution for preparing, it is methyl red and the bromthymol blue ethanolic solution (weight ratio of methyl red and bromthymol blue is 1/2) of 0.6wt% by 1.5L concentration that this pH indicator is contaminated solution, with 3L concentration be that the aqueous solution of the PVP-5000 of 6wt% forms, soak after 2 hours, dry moisture to 4wt% at 75 ℃, this pH indication material contains the mixed indicator of 0.2wt%, the PVP-5000 of 4wt%.The pH indication material that obtains and the silica gel of same size mix, and making the percent by weight of pH indication material is 8wt%, and the performance test data of silica gel cat litter sees Table 3:
Table 3
Embodiment 4
With the 3kg pore volume is 1.41ml/g, bulk density is 235g/L, granularity is that the block silica gel of 0.7-1.5mm is put into the pH indicator dip-dye solution for preparing, it is methyl red and the bromthymol blue ethanolic solution (weight ratio of methyl red and bromthymol blue is 1/4) of 0.6wt% by 8L concentration that this pH indicator is contaminated solution, with 4L concentration be that the aqueous solution of the propylene glycol of 12wt% forms, soak after 2 hours, dry moisture to 4wt% at 75 ℃, this pH indication material contains the mixed indicator of 0.4wt%, the propylene glycol of 4wt%.The pH indication material that obtains and the silica gel of same size mix, and making the percent by weight of pH indication material is 6wt%, and the performance test data of silica gel cat litter sees Table 4:
Table 4
Embodiment 5
With the 2kg pore volume is 1.03ml/g, bulk density is 388g/L, granularity is that the block silica gel of 2-4mm is put into the pH indicator dip-dye solution for preparing, it is methyl red and the bromthymol blue ethanolic solution (weight ratio of methyl red and bromthymol blue is 1/8) of 1wt% by 3L concentration that this pH indicator is contaminated solution, with 3L concentration be that the aqueous solution of the glycerine of 10wt% forms, soak after 2 hours, dry moisture to 4wt% at 75 ℃, this pH indication material contains the mixed indicator of 0.5wt%, the glycerine of 5wt%.The pH indication material that obtains and the silica gel of same size mix, and making the percent by weight of pH indication material is 3wt%, and the performance test data of silica gel cat litter sees Table 5:
Table 5
Embodiment 6
With the 2kg pore volume is 0.89ml/g, bulk density is 391g/L, granularity is that the block silica gel of 0.7-1.5mm is put into the pH indicator dip-dye solution that 4L prepares, this pH indicator is contaminated methyl red and the bromthymol blue mixed indicator (weight ratio of methyl red and bromthymol blue is 1/6) that contains 0.5wt% in the solution, the PVP-10000 of 5wt% soaked after 3 hours, dried moisture to 4wt% at 75 ℃, this pH indication material contains the mixed indicator of 0.5wt%, the PVP-10000 of 5wt%.The pH indication material that obtains and the silica gel of same size mix, and making the percent by weight of pH indication material is 4wt%, and the performance test data of silica gel cat litter sees Table 6:
Table 6
Claims (9)
1, a kind of cat urine pH indication material, it is characterized in that with silica gel being carrier, contain the pH mixed indicator that accounts for pH indication material general assembly (TW) 0.025-2% and the water-soluble polymers of 0.5-20%, wherein the weight ratio of methyl red and bromthymol blue is 1 in the pH mixed indicator: 12-1: 1.
2, cat urine pH indication material according to claim 1, it is characterized in that the pH mixed indicator accounts for the 0.04-1.5% of pH indication material general assembly (TW), water-soluble polymers accounts for the 2-8% of pH indication material general assembly (TW), and the weight ratio of methyl red and bromthymol blue is 1 in the pH mixed indicator: 10-1: 2.
3, cat urine pH according to claim 1 indication material is characterized in that described water-soluble polymers adopts a kind of in polyvinylpyrrolidone, polyglycol, propylene glycol, glycerine or the polyvinyl alcohol (PVA) or two or more potpourri arbitrarily wherein.
4, cat urine pH indication material according to claim 3, it is characterized in that the polyvinylpyrrolidone weight average molecular weight range is 2000-500000, the polyglycol weight average molecular weight range is 200-20000, and the polyvinyl alcohol (PVA) weight average molecular weight range is 1000-35000.
5, cat urine pH indication material according to claim 1 is characterized in that described carrier silica gel is block silica gel, and its average pore volume is 0.5-1.8ml/g, and bulk density is 200-700g/L, and granularity is 0.5-8mm.
6, a kind of pH indication silica gel cat litter that uses the described cat urine pH indication of one of claim 1～5 material is characterized in that being made up of the potpourri of pH indication material and basic silica gel, and wherein pH indication material accounts for the 1-15% of silica gel cat litter general assembly (TW).
7, pH indication silica gel cat litter according to claim 6 is characterized in that described pH indication material accounts for the 2-10% of silica gel cat litter general assembly (TW).
8, pH indication silica gel cat litter according to claim 6 is characterized in that described basic silica gel is average pore volume 0.5-1.8ml/g, bulk density 200-700g/L, the block silica gel of granularity 0.5-8mm.
9, a kind of method for preparing the described pH indication of claim 6 silica gel cat litter is characterized in that may further comprise the steps:
(a) methyl red, bromthymol blue and water-soluble polymer dissolves are made dip-dye solution in the mixed solution of second alcohol and water, perhaps methyl red and bromthymol blue are dissolved in absolute ethyl alcohol or the alcoholic solution based on ethanol in advance, make the pH indicator solution, and with water-soluble polymer dissolves in water, again both are mixed, be mixed with dip-dye solution;
(b) will contaminate in the carrier silica gel immersion dip-dye solution, take out drying then, become pH indication material;
(c) the pH indication material that (b) is made does not mix with there being treated basic silica gel.
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| WO2014146287A1 (en) * | 2013-03-22 | 2014-09-25 | 青岛美高集团有限公司 | Cat urine ph indicating material, health indicating cat litter, and method for preparing health indicating cat litter |
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| US5267532A (en) * | 1992-05-05 | 1993-12-07 | Anitox Corporation | pH-indicating material and cat litter containing same |
| US6162646A (en) * | 1996-04-03 | 2000-12-19 | William H. Webster | Urine pH indicator system and associated methods |
| GB2408330B (en) * | 2003-11-22 | 2008-12-03 | Advanced Gel Technology Ltd | Polymeric materials comprising pH indicators for use in wound dressings |
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