A flavor controlled-release superabsorbent resin, a preparation method and application thereof

Abstract

This invention relates to the field of superabsorbent polymers, specifically to a fragrance-controlled release superabsorbent polymer, its preparation method, and its application. By weight, the raw materials for preparation include at least 10-20 parts of superabsorbent polymer and 0.2-1 parts of fragrance. The fragrance preparation materials include at least a fragrance source and a carrier. Based on the mass of the superabsorbent polymer, the amount of fragrance source added is 0.5-2%. This invention effectively overcomes the problem of insufficient fragrance retention time when fragrances are applied to superabsorbent polymers, enabling the provided superabsorbent polymer to have a highly efficient deodorizing, fragrance-releasing, and odor-masking effect. It achieves a controlled release effect in the use of absorbent products, and is suitable for practical applications requiring odor masking, such as pet mats, pet beds, and adult care mats.

Description

Technical Field

[0001] This invention relates to the field of superabsorbent resins, specifically to a flavored, slow-release superabsorbent resin, its preparation method, and its applications. Background Technology

[0002] As people's living standards improve, more and more families in modern society are keeping pets, and people are paying increasing attention to their pets' health. To create a good living environment for their pets, people usually use pet mats. The purpose of a pet mat is to line the pet's bed, collect and absorb the pet's excrement, keep the bed dry, make the pet feel comfortable, and prevent illness.

[0003] However, most pet mats on the market today are absorbent and waterproof. Some also incorporate bamboo charcoal for deodorization. While bamboo charcoal prevents mites from penetrating the fabric through its microporous structure, it cannot repel or kill mites, nor can it reduce the mite density in the environment. Furthermore, bamboo charcoal's deodorizing effect is fragrance-free and cannot effectively mask odors. Currently, pet mats on the market generally only absorb moisture and keep the area dry, lacking deodorizing features. Pet excrement can easily pollute the owner's living environment through odor, lowering the owner's quality of life.

[0004] As society pays increasing attention to pet hygiene and health, the popularity of hygiene and absorbent products such as pet mats and beds will also increase. However, the market share of domestic hygiene and absorbent products still lags behind that of foreign brands. Fragrance refers to the general term for pleasant scents and tastes. Fragrances are substances that can be smelled or tasted; they are a class of organic compounds with aromatic odors. Most fragrances are volatile and often have a pleasant aroma. Fragrance essences are mixtures of two or more fragrances, serving as important additives with effects such as scenting, deodorizing, mood-soothing, antibacterial, and mosquito-repellent properties, increasing product added value and possessing broad market prospects. However, the small molecular weight, low boiling point, and poor stability of fragrance essences result in insufficient fragrance retention time, which limits their application. Changes in core materials have a significant impact on the absorbency of sanitary absorbent products and the odor of applicable scenarios. Core materials with large absorbency, good water retention, rapid diffusion, and fragrance release are beneficial to improving the user experience. Therefore, overcoming the aforementioned application defects of fragrances and flavorings while optimizing the fragrance-enhancing and deodorizing properties of the absorbent core is crucial for the development of the sanitary absorbent products industry for odorous liquids such as urine. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a fragrance-controlled release superabsorbent polymer, effectively overcoming the problem of insufficient fragrance retention time when fragrances are applied to superabsorbent polymers. This provides the superabsorbent polymer with highly efficient deodorizing, fragrance-releasing, and odor-masking effects, achieving a controlled release effect in absorbent product usage scenarios. It is suitable for practical application scenarios such as pet mats, pet beds, and adult care mats where odors need to be masked.

[0006] The present invention provides a fragrance-controlled release superabsorbent polymer, which, by weight, comprises at least 10-20 parts of superabsorbent polymer and 0.2-1 parts of fragrance, wherein the fragrance comprises at least a fragrance source and a carrier.

[0007] As a preferred technical solution, the superabsorbent resin is a cross-linked sodium polyacrylate superabsorbent resin.

[0008] As a preferred technical solution, the superabsorbent resin meets the following indicators: a. pH = 5.9-6.5; b. Residual acrylic acid monomer ≤500ppm; c. Particle size distribution: The mass percentage of particles with a diameter > 452 μm is ≤ 2.0%; the mass percentage of particles with a diameter < 300 μm and a diameter ≤ 452 μm is 6.0-36.0%; the mass percentage of particles with a diameter < 100 μm and a diameter ≤ 300 μm is 41.0-91.0%; the mass percentage of particles with a diameter ≤ 45 μm and a diameter ≤ 150 μm is 7.0-17.0%; and the mass percentage of particles with a diameter < 45 μm is ≤ 1.0%. d. Volatile matter content: 1.0-6.0 wt%; e. Absorption volume (physiological saline) ≥ 61.0 g / g; f. Water retention capacity (F=250g) ≥36.0g / g; g. Pressure absorption capacity (0.3 psi) ≥11.0 g / g; h. Density 0.63-0.75 g / mL; i. Whiteness ≥ 65g / g; j. Absorption rate ≤ 24s.

[0009] Preferably, the superabsorbent resin is FP701, which is derived from Dansen.

[0010] As a preferred technical solution, the fragrance source is a chemical fragrance source and / or a plant fragrance source. The chemical fragrance source is selected from at least one of isopropyl myristate, methyl dihydrojasmonate, dihydromyrcene alcohol, linalyl acetate, linalool, leaf alcohol, benzyl salicylate, and dipropylene glycol. The plant fragrance source is selected from at least one of floral fragrance, fruit fragrance, and woody fragrance.

[0011] As a preferred technical solution, the fragrance source is selected from at least one of osmanthus fragrance, jasmine fragrance, rose fragrance, lavender fragrance, peach fragrance, and talcum powder fragrance, preferably at least one of the following: Ya Xiang Wu Osmanthus Fragrance (Powder), Ya Xiang Wu Jasmine Fragrance (Powder), Li Jin Rose Fragrance Powder (Microcapsule Powder), Shanghai Hao Yue Lavender Fragrance (Oil Agent), Shanghai Hao Yue Peach Fragrance (Oil Agent), Li Jin Rose Fragrance Agent (Microcapsule Liquid), Changzhou Balin'er Lavender Fragrance (Microcapsule Liquid), Xin Yi Tian Talcum Powder Fragrance (Powder), Xin Yi Tian Talcum Powder Fragrance (Water-based), and Xin Yi Tian Talcum Powder Fragrance (Oil-based).

[0012] Preferably, the fragrance source is selected from one of the following: Osmanthus fragrance (powder) from Ya Xiang Wu, Lavender fragrance (oil-based agent) from Shanghai Hao Yue, Peach fragrance (oil-based agent) from Shanghai Hao Yue, and Talcum powder fragrance (powder) from Xin Yi Tian.

[0013] As a preferred technical solution, the carrier is selected from at least one of water, polyethylene glycol, β-cyclodextrin, hydroxypropyl methylcellulose, and polyvinyl alcohol.

[0014] Preferably, the polyethylene glycol is selected from at least one of polyethylene glycol 2000, polyethylene glycol 4000, and polyethylene glycol 6000.

[0015] Preferably, the degree of alcoholysis of the polyvinyl alcohol is 55-89% (mol / mol).

[0016] Preferably, the carrier is a combination of β-cyclodextrin and water. The mass ratio of β-cyclodextrin to water is (5-15):100, preferably 8:100.

[0017] As a preferred technical solution, the mass ratio of the flavor source to β-cyclodextrin is (2-8):(5-10), preferably (2-8):8.

[0018] As a preferred technical solution, the raw materials for preparing the fragrance also include at least one of citric acid monohydrate, baking soda, sodium carbonate, sodium chloride, and surfactant.

[0019] As a preferred technical solution, the carrier is polyethylene glycol 4000, and the mass ratio of the fragrance source to polyethylene glycol 4000 is (0.4-1):20. At this time, the raw materials for preparing the fragrance also include a combination of citric acid monohydrate and baking soda or sodium carbonate, and the mass ratio of polyethylene glycol 4000 to citric acid monohydrate and baking soda or sodium carbonate is 20:(1.25-2):(0.315-0.6).

[0020] As a preferred technical solution, the carrier is polyethylene glycol 6000, and the mass ratio of the fragrance source to polyethylene glycol 6000 is (1-2):(8-9).

[0021] As a preferred technical solution, the amount of fragrance source added is 0.5-2% based on the mass of the superabsorbent resin.

[0022] The main problem with using fragrances in superabsorbent polymers (SAPs) is insufficient fragrance retention time, thus failing to achieve a controlled-release effect and failing to meet the application requirements of pet mats, pet beds, and adult care pads where odor masking is necessary. This invention, through screening a large number of fragrances and further optimizing the carrier selection in the fragrance preparation process, combined with controlled fragrance addition, ensures that the provided fragrance does not clump, has good adhesion to the SAP, and guarantees a subsequent controlled-release effect. During the research process, the inventors discovered that while it is relatively easy to achieve a fragrance under normal conditions when the fragrance source and carrier are combined, the fragrance disappears after water is added. The present invention conducted a large number of exploratory experiments and unexpectedly discovered that by using polyethylene glycol 4000, polyethylene glycol 6000 and β-cyclodextrin as carriers, and combining one of the following fragrances (powdered: Ya Xiang Wu Osmanthus Fragrance, Shanghai Hao Yue Lavender Fragrance, Shanghai Hao Yue Peach Fragrance, and Xin Yi Tian Talcum Powder) with superabsorbent resin, a fragrance can still have a rich fragrance after water is added, which can meet the need to cover odors in the usage scenario. In particular, the fragrance made by combining Shanghai Haoyue lavender fragrance (oil agent), Shanghai Haoyue peach fragrance (oil agent), and Xinyitian talcum powder fragrance (powder) with β-cyclodextrin and super absorbent resin has almost no obvious fragrance under normal conditions, but it emits the fragrance of the corresponding fragrance after adding water and can last for a period of time, which can meet the needs of slow release and odor coverage in the usage scenario.

[0023] Another aspect of the present invention provides a method for preparing a fragrance-controlled release superabsorbent polymer, comprising at least the following steps: mixing fragrance and superabsorbent polymer and bonding them at 50-100°C to obtain the fragrance-controlled release superabsorbent polymer.

[0024] The production process of the fragrance-controlled release superabsorbent polymer provided by this invention is simple, has high production efficiency, and is easy to realize large-scale industrial production, promotion and application.

[0025] Beneficial effects 1. This invention provides a fragrance-controlled release superabsorbent resin, which effectively overcomes the problem of insufficient fragrance retention time when fragrances are applied to superabsorbent resins. The provided superabsorbent resin has a highly efficient deodorizing, fragrance-releasing, and odor-masking effect, achieving a controlled release effect in the use of absorbent products. It is suitable for practical application scenarios such as pet mats, pet beds, and adult care mats where odors need to be masked.

[0026] 2. This invention further optimizes the selection of carriers in the fragrance preparation process by screening a large number of fragrances and controlling the amount of fragrance added, so that the provided fragrances will not clump and the fragrances have good adhesion to the superabsorbent resin, ensuring the subsequent controlled release effect.

[0027] 3. This invention uses polyethylene glycol 4000, polyethylene glycol 6000 and β-cyclodextrin as carriers, and combines them with one of the following: Ya Xiang Wu Osmanthus Fragrance (Powder), Shanghai Hao Yue Lavender Fragrance (Oil Agent), Shanghai Hao Yue Peach Fragrance (Oil Agent), and Xin Yi Tian Talcum Powder Fragrance (Powder). The resulting fragrance, when combined with a superabsorbent resin, retains a rich fragrance even after water is added, thus meeting the need to cover odors in various usage scenarios.

[0028] 4. This invention uses Shanghai Haoyue lavender fragrance (oil agent), Shanghai Haoyue peach fragrance (oil agent), and Xinyitian talcum powder fragrance (powder) in combination with β-cyclodextrin to make a fragrance compounded with superabsorbent resin. Under normal conditions, it has almost no obvious fragrance, but after adding water, it emits the fragrance of the corresponding fragrance and can last for a period of time, which can meet the needs of slow release and odor coverage in the application scenario.

[0029] 5. The production process of the fragrance-controlled release superabsorbent resin provided by this invention is simple, has high production efficiency, and is easy to realize large-scale industrial production, promotion and application. Detailed Implementation

[0030] The formulations and preparation methods of each spice in the embodiments of the present invention are shown in Table 1.

[0031] Table 1

[0032] Examples 1-14 Examples 1-14 of the present invention provide a fragrance-controlled release superabsorbent polymer and its preparation method. The formulation and preparation method are shown in Table 2. The superabsorbent polymer FP701 is derived from Dansen.

[0033] Table 2

[0034] Performance testing 1. The fragrance retention values ​​under normal conditions and after adding water of the controlled-release superabsorbent polymers provided in Examples 1-11 were tested, and the results are shown in Table 3. The criterion for determining the fragrance retention value was: the fragrance intensity of linalool was defined as 10, and the fragrance retention values ​​under normal conditions and after adding water of the controlled-release superabsorbent polymers provided in Examples 1-11 were obtained by comparing the fragrance intensity of linalool with that of linalool. The test results were the average values ​​determined by 5 testers.

[0035] Table 3

[0036] 2. Using 2.5 g / g, 1.0 g / g, and 0.5 g / g ammonia solutions to simulate odor sources, 0.5 g of the fragrance-controlled release superabsorbent polymer provided in Examples 11-14 was added to 30 mL of the above-mentioned ammonia solutions of different concentrations. The odor value (the intensity of the odor, with a maximum score of 10 points, where +X indicates the intensity of the fragrance expressed by the sample) was measured every 1 hour by opening the lid and smelling the sample. New Day baby powder fragrance (powder) was used as a control, and 701FP was used as a fragrance-free blank sample. The test results are the average of the results judged by 5 testers, as shown in Table 4.

[0037] Table 4

Claims

1. A fragrance-controlled release superabsorbent polymer, characterized in that, The raw materials for its preparation include at least 10-20 parts of superabsorbent resin and 0.2-1 parts of fragrance, wherein the raw materials for the preparation of fragrance include at least a fragrance source and a carrier, and the amount of fragrance source added is 0.5-2% based on the mass of superabsorbent resin.

2. The fragrance-controlled release superabsorbent polymer according to claim 1, characterized in that, The fragrance source is a chemical fragrance source and / or a plant fragrance source. The chemical fragrance source is selected from at least one of isopropyl myristate, methyl dihydrojasmonate, dihydromyrcene alcohol, linalyl acetate, linalool, leaf alcohol, benzyl salicylate, and dipropylene glycol. The plant fragrance source is selected from at least one of floral fragrance, fruit fragrance, and woody fragrance.

3. The fragrance-controlled release superabsorbent polymer according to claim 2, characterized in that, The fragrance source is selected from at least one of the following: osmanthus fragrance, jasmine fragrance, rose fragrance, lavender fragrance, peach fragrance, and talcum powder fragrance.

4. The fragrance-controlled release superabsorbent polymer according to claim 3, characterized in that, The carrier is selected from at least one of water, polyethylene glycol, β-cyclodextrin, hydroxypropyl methylcellulose, and polyvinyl alcohol.

5. The fragrance-controlled release superabsorbent polymer according to claim 4, characterized in that, The polyethylene glycol is selected from at least one of polyethylene glycol 2000, polyethylene glycol 4000, and polyethylene glycol 6000.

6. The fragrance-controlled release superabsorbent polymer according to claim 4, characterized in that, The degree of alcoholysis of the polyvinyl alcohol is 55-89%.

7. The fragrance-controlled release superabsorbent polymer according to claim 4, characterized in that, The carrier is a combination of β-cyclodextrin and water; the mass ratio of β-cyclodextrin to water is (5-15):

100.

8. The method for preparing the flavored, controlled-release superabsorbent polymer according to claim 7, characterized in that, The mass ratio of the flavor source to β-cyclodextrin is (2-8):(5-10).

9. The method for preparing the flavored, controlled-release superabsorbent polymer according to claim 5, characterized in that, The raw materials for preparing the fragrance also include at least one of citric acid monohydrate, baking soda, sodium carbonate, sodium chloride, and surfactant.

10. A method for preparing a flavored, controlled-release superabsorbent polymer according to any one of claims 1-9, characterized in that, The fragrance and superabsorbent polymer are mixed and bonded at 50-100℃ to obtain a fragrance-controlled release superabsorbent polymer.

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