Antibacterial water-absorbing resin with deodorizing function and preparation method thereof

Abstract

The present invention relates to the technical field of C08F120 / 00, specifically to an antibacterial water-absorbing resin having a deodorizing function and a preparation method thereof, which comprises at least the following raw materials by weight: 80-100 parts of acrylic acid water-absorbing resin semi-finished products, 120-150 parts of alkane compounds, 4-8 parts of organic acid salt aqueous solutions, 25-40 parts of cross-linking solutions, 0.25-2 parts of organic-inorganic acid salt compositions, and 0.02-0.1 parts of antibacterial agents. By optimizing the formula and preparation process of the water-absorbing resin, the water-absorbing resin provided has excellent antibacterial properties and a deodorizing function without affecting the basic properties of the water-absorbing resin, and effectively avoids safety problems caused by the dissolution of the antibacterial agent.

Description

Technical Field

[0001] The invention relates to the technical field of C08F120 / 00, in particular to an antibacterial water-absorbing resin with deodorizing function and a preparation method thereof. Background Art

[0002] The super absorbent resin for disposable sanitary products is mainly composed of synthetic polymers of polyacrylic acid. Due to its unique three-dimensional network structure, the super absorbent resin of polyacrylic acid has the function of absorbing water hundreds to thousands of times higher than its own weight, and has excellent water retention performance. It is widely used in the fields of infant diapers, adult diapers, and female sanitary products. Disposable sanitary pads or diapers absorb a large amount of human body fluids and urine when used. They are very easy to breed bacteria and emit unpleasant odors in a humid and warm environment. For disposable sanitary products that come into contact with the human body for a long time, the development of antibacterial super absorbent resins with deodorizing functions is crucial.

[0003] A Chinese patent application (publication number CN111675815A) discloses a method for preparing an antibacterial super absorbent resin, which mainly comprises atomizing and dispersing an aqueous dispersion containing one or more antibacterial agents selected from chitosan, aloe vera freeze-dried powder, polyhexanide hydrochloride, nano-silver, nano-zinc oxide and quaternary ammonium salt on the surface of super absorbent resin beads. However, since the antibacterial agent stays on the resin surface, the dissolved antibacterial agent will affect the human microecological environment, causing bacterial flora disorder, and even irritating the skin and sensitive mucous membranes, causing discomfort or inducing disease, and it also has no deodorizing function. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an antibacterial water-absorbent resin with a deodorizing function. By optimizing the formula and preparation process of the water-absorbent resin, the water-absorbent resin provided has excellent antibacterial properties and a deodorizing function without affecting the basic properties of the water-absorbent resin, thereby effectively avoiding the safety problems caused by the dissolution of the antibacterial agent.

[0005] On one hand, the present invention provides an antibacterial water-absorbing resin with a deodorizing function, which comprises at least the following raw materials by weight: 80-100 parts of a semi-finished acrylic water-absorbing resin, 120-150 parts of an alkane compound, 4-8 parts of an organic acid salt aqueous solution, 25-40 parts of a cross-linking solution, 0.25-2 parts of an organic-inorganic acid salt composition, and 0.02-0.1 parts of an antibacterial agent.

[0006] As a preferred technical solution, the particle size of the acrylic acid water-absorbing resin semi-finished product is 106-850 microns, and the centrifugal water retention rate is 45-55g / g; the acrylic acid water-absorbing resin semi-finished product comes from Yixing Dansen Technology Co., Ltd.

[0007] Preferably, the alkane compound is at least one of a straight-chain alkane, a branched-chain alkane and a cycloalkane having 5 to 10 carbon atoms.

[0008] Preferably, the alkane compound is n-heptane.

[0009] As a preferred technical solution, the organic acid salt aqueous solution includes 5-8% organic acid salt, 8-12% aluminum sulfate, and water to make up the balance, by mass percentage. Preferably, the organic acid salt is a combination of sodium lactate and pentasodium diethylenetriamine pentaacetate, and the mass ratio of sodium lactate to pentasodium diethylenetriamine pentaacetate is (0.25-0.3): (0.01-0.05).

[0010] As a preferred technical solution, the cross-linking solution includes glycidyl ether compound, Tween and water. The mass ratio of the glycidyl ether compound, Tween and water is 0.1:(0.2-0.5):(33.0-33.5).

[0011] Preferably, the glycidyl ether compound is diethanol diglycidyl ether, and the Tween is Tween 60.

[0012] Based on the system of the present invention, a semi-finished acrylic acid-based water-absorbent resin with a particle size of 106 to 850 microns and a centrifugal water retention ratio of 45 to 55 g / g is treated with n-heptane and then surface cross-linked, which effectively solves the problem of cracking of the cross-linked layer or insufficient restriction of linear polymer migration to the outside caused by the difference in swelling capacity between the surface cross-linked layer and the internal cross-linked layer during the swelling process of the water-absorbent resin product.

[0013] As a preferred technical solution, the organic-inorganic acid salt composition is a combination of at least one of sodium percarbonate, sodium perborate, sodium carbonate, and sodium bicarbonate and sodium nonanoyloxybenzenesulfonate.

[0014] Preferably, the organic-inorganic acid salt composition is a combination of sodium percarbonate, sodium carbonate and sodium nonanoyloxybenzene sulfonate. Preferably, the mass ratio of sodium percarbonate, sodium carbonate and sodium nonanoyloxybenzene sulfonate is (3-6):1:(3-6).

[0015] The present invention introduces a combination of the above-mentioned sodium percarbonate, sodium carbonate and sodium nonanoyloxybenzene sulfonate, especially controlling the mass ratio of sodium percarbonate, sodium carbonate and sodium nonanoyloxybenzene sulfonate to (3-6):1:(3-6), so that the provided water-absorbing resin product has excellent deodorizing ability.

[0016] As a preferred technical solution, the antibacterial agent is at least one of chitosan quaternary ammonium salt, polyhexanide hydrochloride, polyhexamethyleneguanidine hydrochloride, and didecyldimethylammonium chloride; preferably, the antibacterial agent is didecyldimethylammonium chloride.

[0017] Based on the system of the present invention, by simultaneously introducing an organic-inorganic acid salt composition and didecyldimethylammonium chloride, the provided water-absorbing resin has excellent antibacterial properties and can achieve a rapid, efficient and lasting removal effect of the resin on instantaneous odor sources and long-term odor sources in urine and feces.

[0018] Another aspect of the present invention provides a method for preparing an antibacterial water-absorbing resin having a deodorizing function, comprising at least the following steps:

[0019] (1) After mixing the semi-finished acrylic acid water-absorbent resin, the organic-inorganic acid salt composition and the alkane compound, the temperature and the rotation speed are controlled, and a cross-linking solution is added to carry out stirring reaction for 50-70 minutes, and then the temperature is increased to azeotropically dry the reaction solution until no water fraction is generated to obtain a surface cross-linked water-absorbent resin;

[0020] (2) The surface cross-linked water-absorbing resin is mixed with a mixed solution of an organic acid salt aqueous solution and an antibacterial agent to obtain the product.

[0021] Preferably, the temperature is 78-82° C. and the rotation speed is 400-600 rpm.

[0022] Preferably, the heating is specifically: heating to 100-110°C.

[0023] Based on the system of the present invention, by controlling the organic-inorganic acid salt composition to be directly blended and added before the acrylic acid water-absorbing resin semi-finished product is cross-linked, and controlling the cross-linking temperature, time and azeotropic drying temperature, the influence of the organic-inorganic acid salt composition on the conventional properties of the water-absorbing resin is effectively reduced, while giving the water-absorbing resin excellent deodorizing properties.

[0024] Based on the system of the present invention, the antibacterial water-absorbent resin is prepared by controlling the mixing of the antibacterial agent didecyl dimethyl ammonium chloride with an organic acid salt aqueous solution and then mixing it with a surface-crosslinked water-absorbent resin, so that the didecyl dimethyl ammonium chloride can be uniformly dispersed and fixed on the surface of the surface-crosslinked water-absorbent resin, which significantly improves the non-dissolution property of the antibacterial agent and also helps to improve the anti-yellowing performance of the water-absorbent resin.

[0025] Beneficial Effects

[0026] 1. The present invention provides an antibacterial water-absorbent resin with a deodorizing function. By optimizing the formula and preparation process of the water-absorbent resin, the water-absorbent resin provided has excellent antibacterial properties and a deodorizing function without affecting the basic properties of the water-absorbent resin, thereby effectively avoiding the safety problems caused by the dissolution of the antibacterial agent.

[0027] 2. Based on the system of the present invention, the semi-finished acrylic acid absorbent resin with a particle size of 106 to 850 microns and a centrifugal water retention ratio of 45 to 55 g / g is treated with n-heptane and then surface cross-linked, which effectively solves the problem of cracking of the cross-linked layer or insufficient restriction of linear polymer migration to the outside caused by the difference in swelling capacity between the surface cross-linked layer and the internal cross-linked layer during the swelling process of the absorbent resin product.

[0028] 3. The present invention introduces the combination of the above-mentioned sodium percarbonate, sodium carbonate and sodium nonanoyloxybenzene sulfonate, especially controlling the mass ratio of sodium percarbonate, sodium carbonate and sodium nonanoyloxybenzene sulfonate to (3-6):1:(3-6), so that the water-absorbing resin product provided has excellent deodorizing ability.

[0029] 4. Based on the system of the present invention, by simultaneously introducing an organic-inorganic acid salt composition and didecyldimethylammonium chloride, the provided water-absorbing resin has excellent antibacterial properties and can achieve a rapid, efficient and lasting removal effect of the resin on instantaneous odor sources and long-term odor sources in urine and feces.

[0030] 5. Based on the system of the present invention, the antibacterial agent didecyl dimethyl ammonium chloride is mixed with an organic acid salt aqueous solution and then mixed with a surface cross-linked water-absorbent resin to prepare an antibacterial water-absorbent resin, so that the didecyl dimethyl ammonium chloride can be evenly dispersed and fixed on the surface of the surface cross-linked water-absorbent resin, which significantly improves the non-dissolution of the antibacterial agent and also helps to improve the anti-yellowing performance of the water-absorbent resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 1 is a yellowing test result diagram of the embodiments of the present invention and the comparative examples, wherein a and b are yellowing test result diagrams of the embodiments 1-4 and the comparative examples 1-2, respectively. DETAILED DESCRIPTION

[0032] Example 1

[0033] Embodiment 1 of the present invention provides an antibacterial water-absorbent resin having a deodorizing function, which comprises the following raw materials in parts by weight: 100 parts of an acrylic acid-based water-absorbent resin semi-finished product, 150 parts of an alkane compound, 5 parts of an organic acid salt aqueous solution, 33.6 parts of a cross-linking solution, 1.75 parts of an organic-inorganic acid salt composition, and 0.04 parts of an antibacterial agent.

[0034] The particle size of the acrylic acid water-absorbent resin semi-finished product is 380 microns, and the centrifugal water retention rate is 50.5 g / g; the acrylic acid water-absorbent resin semi-finished product comes from Yixing Dansen Technology Co., Ltd.

[0035] The alkane compound is n-heptane.

[0036] The organic acid salt aqueous solution comprises 6% organic acid salt, 10% aluminum sulfate and the balance of water by mass percentage. The organic acid salt is a combination of sodium lactate and pentasodium diethylenetriamine pentaacetate, and the mass ratio of sodium lactate to pentasodium diethylenetriamine pentaacetate is 0.27:0.03.

[0037] The cross-linking solution comprises a glycidyl ether compound, Tween and water, wherein the mass ratio of the glycidyl ether compound, Tween and water is 0.1:0.3:33.2.

[0038] The glycidyl ether compound is diethanol diglycidyl ether, and the Tween is Tween 60.

[0039] The organic-inorganic acid salt composition is a combination of sodium percarbonate, sodium carbonate, and sodium nonanoyloxybenzene sulfonate. The mass ratio of the sodium percarbonate, sodium carbonate, and sodium nonanoyloxybenzene sulfonate is 3:1:3

[0040] The antibacterial agent is didecyl dimethyl ammonium chloride.

[0041] Embodiment 1 of the present invention provides a method for preparing an antibacterial water-absorbing resin having a deodorizing function, comprising the following steps:

[0042] (1) After mixing the semi-finished acrylic acid water-absorbent resin, the organic-inorganic acid salt composition and the alkane compound, the temperature and the rotation speed are controlled, and a cross-linking solution is added to carry out stirring reaction for 60 minutes, and then the temperature is increased to azeotropically dry the reaction solution until no water fraction is generated to obtain a surface cross-linked water-absorbent resin;

[0043] (2) The surface cross-linked water-absorbing resin is mixed with a mixed solution of an organic acid salt aqueous solution and an antibacterial agent to obtain the product.

[0044] The temperature is 80° C. and the rotation speed is 500 rpm.

[0045] The heating is specifically: heating to 105°C.

[0046] Example 2

[0047] Embodiment 2 of the present invention provides an antibacterial water-absorbing resin with deodorizing function, which comprises the following raw materials by weight: 100 parts of acrylic acid water-absorbing resin semi-finished product, 150 parts of alkane compound, 5 parts of organic acid salt aqueous solution, 33.6 parts of cross-linking solution, and 0.04 parts of antibacterial agent.

[0048] The particle size of the acrylic acid water-absorbent resin semi-finished product is 380 microns, and the centrifugal water retention rate is 50.5 g / g; the acrylic acid water-absorbent resin semi-finished product comes from Yixing Dansen Technology Co., Ltd.

[0049] The alkane compound is n-heptane.

[0050] The organic acid salt aqueous solution comprises 6% organic acid salt, 10% aluminum sulfate and the balance of water by mass percentage. The organic acid salt is a combination of sodium lactate and pentasodium diethylenetriamine pentaacetate, and the mass ratio of sodium lactate to pentasodium diethylenetriamine pentaacetate is 0.27:0.03.

[0051] The cross-linking solution comprises a glycidyl ether compound, Tween and water, wherein the mass ratio of the glycidyl ether compound, Tween and water is 0.1:0.3:33.2.

[0052] The glycidyl ether compound is diethanol diglycidyl ether, and the Tween is Tween 60.

[0053] The antibacterial agent is didecyl dimethyl ammonium chloride.

[0054] Embodiment 2 of the present invention provides a method for preparing an antibacterial water-absorbing resin having a deodorizing function, comprising the following steps:

[0055] (1) After mixing the acrylic acid-based water-absorbent resin semi-finished product with an alkane compound, the temperature and rotation speed are controlled, a crosslinking solution is added, and the mixture is stirred and reacted for 60 minutes, and then the temperature is increased to azeotropically dry the reaction solution until no water fraction is generated to obtain a surface crosslinked water-absorbent resin;

[0056] (2) The surface cross-linked water-absorbing resin is mixed with a mixed solution of an organic acid salt aqueous solution and an antibacterial agent to obtain the product.

[0057] The temperature is 80° C. and the rotation speed is 500 rpm.

[0058] The heating is specifically: heating to 105°C.

[0059] Example 3

[0060] Embodiment 3 of the present invention provides an antibacterial water-absorbent resin having a deodorizing function, which comprises the following raw materials in parts by weight: 100 parts of a semi-finished acrylic acid water-absorbent resin, 150 parts of an alkane compound, 5 parts of an organic acid salt aqueous solution, 33.6 parts of a cross-linking solution, and 1.75 parts of an organic-inorganic acid salt composition.

[0061] The particle size of the acrylic acid water-absorbent resin semi-finished product is 380 microns, and the centrifugal water retention rate is 50.5 g / g; the acrylic acid water-absorbent resin semi-finished product comes from Yixing Dansen Technology Co., Ltd.

[0062] The alkane compound is n-heptane.

[0063] The organic acid salt aqueous solution comprises 6% organic acid salt, 10% aluminum sulfate and the balance of water by mass percentage. The organic acid salt is a combination of sodium lactate and pentasodium diethylenetriamine pentaacetate, and the mass ratio of sodium lactate to pentasodium diethylenetriamine pentaacetate is 0.27:0.03.

[0064] The cross-linking solution comprises a glycidyl ether compound, Tween and water, wherein the mass ratio of the glycidyl ether compound, Tween and water is 0.1:0.3:33.2.

[0065] The glycidyl ether compound is diethanol diglycidyl ether, and the Tween is Tween 60.

[0066] The organic-inorganic acid salt composition is a combination of sodium percarbonate, sodium carbonate, and sodium nonanoyloxybenzene sulfonate. The mass ratio of the sodium percarbonate, sodium carbonate, and sodium nonanoyloxybenzene sulfonate is 3:1:3

[0067] Embodiment 3 of the present invention provides a method for preparing an antibacterial water-absorbing resin having a deodorizing function, comprising the following steps:

[0068] (1) After mixing the semi-finished acrylic acid water-absorbent resin, the organic-inorganic acid salt composition and the alkane compound, the temperature and the rotation speed are controlled, and a cross-linking solution is added to carry out stirring reaction for 60 minutes, and then the temperature is increased to azeotropically dry the reaction solution until no water fraction is generated to obtain a surface cross-linked water-absorbent resin;

[0069] (2) The surface cross-linked water-absorbing resin is mixed with an organic acid salt aqueous solution to obtain the product.

[0070] The temperature is 80° C. and the rotation speed is 500 rpm.

[0071] The heating is specifically: heating to 105°C.

[0072] Example 4

[0073] Embodiment 4 of the present invention provides an antibacterial water-absorbing resin with deodorizing function, which comprises the following raw materials by weight: 100 parts of acrylic acid water-absorbing resin semi-finished product, 150 parts of alkane compound, 5 parts of organic acid salt aqueous solution, and 33.6 parts of cross-linking solution.

[0074] The particle size of the acrylic acid water-absorbent resin semi-finished product is 380 microns, and the centrifugal water retention rate is 50.5 g / g; the acrylic acid water-absorbent resin semi-finished product comes from Yixing Dansen Technology Co., Ltd.

[0075] The alkane compound is n-heptane.

[0076] The organic acid salt aqueous solution comprises 6% organic acid salt, 10% aluminum sulfate and the balance of water by mass percentage. The organic acid salt is a combination of sodium lactate and pentasodium diethylenetriamine pentaacetate, and the mass ratio of sodium lactate to pentasodium diethylenetriamine pentaacetate is 0.27:0.03.

[0077] The cross-linking solution comprises a glycidyl ether compound, Tween and water, wherein the mass ratio of the glycidyl ether compound, Tween and water is 0.1:0.3:33.2.

[0078] The glycidyl ether compound is diethanol diglycidyl ether, and the Tween is Tween 60.

[0079] Embodiment 4 of the present invention provides a method for preparing an antibacterial water-absorbing resin having a deodorizing function, comprising the following steps:

[0080] (1) After mixing the acrylic acid-based water-absorbent resin semi-finished product with an alkane compound, the temperature and rotation speed are controlled, a crosslinking solution is added, and the mixture is stirred and reacted for 60 minutes, and then the temperature is increased to azeotropically dry the reaction solution until no water fraction is generated to obtain a surface crosslinked water-absorbent resin;

[0081] (2) The surface cross-linked water-absorbing resin is mixed with an organic acid salt aqueous solution to obtain the product.

[0082] The temperature is 80° C. and the rotation speed is 500 rpm.

[0083] The heating is specifically: heating to 105°C.

[0084] Comparative Example 1

[0085] Comparative Example 1 of the present invention provides an antibacterial water-absorbent resin with a deodorizing function, which comprises the following raw materials, by weight: 100 parts of an acrylic acid-based water-absorbent resin semi-finished product, 150 parts of an alkane compound, 5 parts of an organic acid salt aqueous solution, 33.6 parts of a cross-linking solution, 1.75 parts of an organic-inorganic acid salt composition, and 0.04 parts of an antibacterial agent.

[0086] The particle size of the acrylic acid water-absorbent resin semi-finished product is 380 microns, and the centrifugal water retention rate is 50.5 g / g; the acrylic acid water-absorbent resin semi-finished product comes from Yixing Dansen Technology Co., Ltd.

[0087] The alkane compound is n-heptane.

[0088] The organic acid salt aqueous solution comprises 6% organic acid salt, 10% aluminum sulfate and the balance of water by mass percentage. The organic acid salt is a combination of sodium lactate and pentasodium diethylenetriamine pentaacetate, and the mass ratio of sodium lactate to pentasodium diethylenetriamine pentaacetate is 0.27:0.03.

[0089] The cross-linking solution comprises a glycidyl ether compound, Tween and water, wherein the mass ratio of the glycidyl ether compound, Tween and water is 0.1:0.3:33.2.

[0090] The glycidyl ether compound is diethanol diglycidyl ether, and the Tween is Tween 60.

[0091] The organic-inorganic acid salt composition is a combination of sodium percarbonate, sodium carbonate, and sodium nonanoyloxybenzene sulfonate. The mass ratio of the sodium percarbonate, sodium carbonate, and sodium nonanoyloxybenzene sulfonate is 3:1:3

[0092] The antibacterial agent is didecyl dimethyl ammonium chloride.

[0093] Comparative Example 1 of the present invention provides a method for preparing an antibacterial water-absorbing resin having a deodorizing function, comprising the following steps:

[0094] (1) After mixing the acrylic acid-based water-absorbing resin semi-finished product, the organic-inorganic acid salt composition, the antibacterial agent and the alkane compound, the temperature and the rotation speed are controlled, and a cross-linking solution is added to carry out stirring reaction for 60 minutes, and then the temperature is increased to azeotropically dry the reaction solution until no water fraction is generated to obtain a surface cross-linked water-absorbing resin;

[0095] (2) The surface cross-linked water-absorbing resin is mixed with an organic acid salt aqueous solution to obtain the product.

[0096] The temperature is 80° C. and the rotation speed is 500 rpm.

[0097] The heating is specifically: heating to 105°C.

[0098] Comparative Example 2

[0099] Comparative Example 2 of the present invention provides an antibacterial water-absorbent resin with deodorizing function, which comprises the following raw materials in parts by weight: 100 parts of a semi-finished acrylic water-absorbent resin, 150 parts of an alkane compound, 5 parts of an organic acid salt aqueous solution, 33.6 parts of a cross-linking solution, 1.75 parts of an organic-inorganic acid salt composition, and 0.04 parts of an antibacterial agent.

[0100] The particle size of the acrylic acid water-absorbent resin semi-finished product is 380 microns, and the centrifugal water retention rate is 50.5 g / g; the acrylic acid water-absorbent resin semi-finished product comes from Yixing Dansen Technology Co., Ltd.

[0101] The alkane compound is n-heptane.

[0102] The organic acid salt aqueous solution comprises 6% organic acid salt, 10% aluminum sulfate and the balance of water by mass percentage. The organic acid salt is a combination of sodium lactate and pentasodium diethylenetriamine pentaacetate, and the mass ratio of sodium lactate to pentasodium diethylenetriamine pentaacetate is 0.27:0.03.

[0103] The cross-linking solution comprises a glycidyl ether compound, Tween and water, wherein the mass ratio of the glycidyl ether compound, Tween and water is 0.1:0.3:33.2.

[0104] The glycidyl ether compound is diethanol diglycidyl ether, and the Tween is Tween 60.

[0105] The organic-inorganic acid salt composition is a combination of sodium percarbonate, sodium carbonate, and sodium nonanoyloxybenzene sulfonate. The mass ratio of the sodium percarbonate, sodium carbonate, and sodium nonanoyloxybenzene sulfonate is 3:1:3

[0106] The antibacterial agent is didecyl dimethyl ammonium chloride.

[0107] Comparative Example 2 of the present invention provides a method for preparing an antibacterial water-absorbing resin having a deodorizing function, comprising the following steps:

[0108] (1) After mixing the acrylic acid-based water-absorbent resin semi-finished product with an alkane compound, the temperature and rotation speed are controlled, a crosslinking solution is added, and the mixture is stirred and reacted for 60 minutes, and then the temperature is increased to azeotropically dry the reaction solution until no water fraction is generated to obtain a surface crosslinked water-absorbent resin;

[0109] (2) The surface cross-linked water-absorbing resin is mixed with a mixture of an organic acid salt aqueous solution, an organic-inorganic acid salt composition and an antibacterial agent.

[0110] The temperature is 80° C. and the rotation speed is 500 rpm.

[0111] The heating is specifically: heating to 105°C.

[0112] Performance Testing Methods

[0113] 1. Deodorization ability test: Weigh 1g of the antibacterial water-absorbing resin prepared in the embodiment and the comparative example, add 20g of adult urine (male urine with an initial odor level of 5 within 6 hours), keep warm at 37°C, and conduct a sensory test after 30 minutes. The sensory test method is: the tester opens the sample cover, puts his nose 3cm away from the bottle mouth, and gently fans with his hand to smell the degree of odor, and the recorder records it. The time from opening the cover to sealing the end of the test for each sample should not exceed 30s. The final result of each sample is the average of the test results of 5 testers, which is recorded in Table 1. The evaluation criteria are as follows: 5: strong odor; 4: very strong odor; 3: easily perceptible odor; 2: very light odor (one can tell what kind of odor it is); 1: faint odor (one can sense the presence of this odor); 0: no odor at all (in order to prevent the situation where the sense organs of the tester do not match the numerical values, the tester only needs to comment on the degree of odor, and a dedicated person will match the sense organs with the numerical values, and limit the test order of the tester to avoid sensory errors caused by the different odor loss caused by each opening of the lid).

[0114] 2. Antibacterial test: Referring to GB 15979-2002 "Hygiene Standard for Disposable Hygiene Products", the antibacterial rates of the antibacterial water-absorbing resins prepared in the examples and comparative examples against Staphylococcus aureus (ATCC 6538) and Escherichia coli (8099) were tested.

[0115] 3. Anti-yellowing test: 10.00 g of the antibacterial water-absorbent resin prepared in the embodiments and comparative examples was accurately weighed and evenly distributed in a watch glass. The initial whiteness was tested using a whiteness meter. The resin was then placed in a constant temperature and humidity chamber at 70° C. and 90% RH for accelerated aging. The resin was taken out after one week. A cylindrical compact having an outer diameter matching the inner diameter of the watch glass and weighing 3 kg was used to flatten and compact the aged SAP surface. The aged antibacterial water-absorbent resin was measured for one week of yellowing whiteness using a whiteness meter. The results are recorded in Table 1.

[0116] 4. Centrifugal water retention rate (CRC): Weigh 0.20g of water-absorbent resin, record the weight as W0 (g), evenly put it into a cloth bag made of non-woven fabric, seal it, and immerse it in a physiological saline solution controlled at 25±2°C. After 30 minutes, take out the bag containing the water-absorbent resin from the saline solution. Use a centrifuge to dehydrate at 250G for 3 minutes, and then weigh it to obtain the weight W2 (g). Measure the weight W1 (g) of the bag after a similar operation without using any water-absorbent. Calculate the centrifugal water retention rate (g / g) according to the following formula, and the results are recorded in Table 1.

[0117] Centrifugal water retention ratio (g / g) = ((W2(g)-W1(g)) / W0(g))-1

[0118] Table 1

[0119]

Claims

1. An antibacterial water-absorbing resin having a deodorizing function, characterized in that: The invention comprises at least the following raw materials by weight: 80-100 parts of acrylic acid water-absorbing resin semi-finished product, 120-150 parts of alkane compound, 4-8 parts of organic acid salt aqueous solution, 25-40 parts of cross-linking solution, 0.25-2 parts of organic-inorganic acid salt composition, and 0.02-0.1 parts of antibacterial agent; the particle size of the acrylic acid water-absorbing resin semi-finished product is 106-850 microns, and the centrifugal water retention rate is 45-55g / g; the alkane compound is n-heptane; the organic-inorganic acid salt composition is a combination of sodium percarbonate, sodium carbonate, and sodium nonanoyloxybenzene sulfonate, and the mass ratio of the sodium percarbonate, sodium carbonate, and sodium nonanoyloxybenzene sulfonate is (3-6):1:(3-6); the antibacterial agent is didecyl dimethyl ammonium chloride; The method for preparing the antibacterial water-absorbing resin having a deodorizing function comprises at least the following steps: (1) After mixing the semi-finished acrylic acid water-absorbent resin, the organic-inorganic acid salt composition and the alkane compound, the temperature and the rotation speed are controlled, and a cross-linking solution is added to carry out stirring reaction for 50-70 minutes, and then the temperature is increased to azeotropically dry the reaction solution until no water fraction is generated to obtain a surface cross-linked water-absorbent resin; (2) The surface cross-linked water-absorbing resin is mixed with a mixed solution of an organic acid salt aqueous solution and an antibacterial agent to obtain the obtained product; the temperature is 78-82° C., and the rotation speed is 400-600 rpm; the heating is specifically: heating to 100-110° C.

2. The antibacterial water-absorbing resin with deodorizing function according to claim 1, characterized in that: Calculated by mass percentage, the organic acid salt aqueous solution comprises 5-8% of organic acid salt, 8-12% of aluminum sulfate, and the balance is supplemented by water.

3. The antibacterial water-absorbing resin with deodorizing function according to claim 2, characterized in that: The organic acid salt is a combination of sodium lactate and pentasodium diethylenetriamine pentaacetate, and the mass ratio of the sodium lactate to pentasodium diethylenetriamine pentaacetate is (0.25-0.3): (0.01-0.05).

4. The antibacterial water-absorbing resin with deodorizing function according to claim 3, characterized in that: The cross-linking solution comprises a glycidyl ether compound, Tween and water.

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