Delayed cold release ice crystal material based on high-molecular water-absorbent resin and preparation method of delayed cold release ice crystal material

Abstract

The invention discloses a delayed cold release ice crystal material based on macromolecular water-absorbent resin and a preparation method of the delayed cold release ice crystal material, and belongs to the technical field of ice crystal preparation. Wherein the additives comprise high-molecular water-absorbent resin which is a main component with water absorption performance, a humectant for improving the wettability and the water-retaining property of the material, a cross-linking agent for enhancing the network structure of the high-molecular water-absorbent resin, and a preservative for preventing the material from mildewing and decaying in long-term storage; the delayed cold release ice crystal material can continuously release cold air after being activated, a continuous cooling effect is provided, and the delayed cold release ice crystal material is suitable for manufacturing various cooling products.

Description

Technical Field

[0001] The invention relates to the technical field of ice crystal preparation, and in particular to a delayed cold-release ice crystal material based on a polymer water-absorbing resin and a preparation method thereof. Background Art

[0002] Delayed-release ice crystal materials achieve a long-term low-temperature release effect by controlling the melting rate of ice crystals. Delayed-release ice crystal materials are often used to make cold compresses, cooling pads and other products to provide users with a continuous cooling effect.

[0003] The delayed cooling-release ice crystal materials in the prior art usually have a certain cooling-release time limit, and the continuous cooling-release time may be short. Summary of the invention

[0004] Based on the above problems, the embodiments of the present invention provide a delayed cooling release ice crystal material based on a polymer water-absorbing resin and a preparation method thereof. The delayed cooling release ice crystal material based on a polymer water-absorbing resin absorbs water and expands when the temperature decreases to form a solid-like structure; when the temperature increases, it slowly releases water to extend the cooling time. The contents of the present invention are as follows:

[0005] The first object of the present invention is to provide a delayed-release ice crystal material based on a polymer water-absorbent resin, comprising water and additives, wherein the additive comprises a polymer water-absorbent resin. The technical point is that the additive is added in an amount of 10-15wt% of the delayed-release ice crystal material. In terms of parts by weight, the additive comprises 10-30 parts by weight of a polymer water-absorbent resin, 1-3 parts by weight of a moisturizer, 1-3 parts by weight of a cross-linking agent and 0.5-0.6 parts by weight of a preservative.

[0006] In order to better realize the above technical scheme, the added amount of the delayed cooling-release ice crystal material based on the polymer water-absorbing resin of the present invention also includes 1-3 parts by weight of cooling liquid.

[0007] In order to better realize the above technical scheme, the cooling liquid in the delayed cooling-release ice crystal material based on the polymer water-absorbing resin of the present invention is at least one of glycerol, ethylene glycol and propylene glycol.

[0008] In order to better realize the above technical scheme, the polymer water-absorbent resin in the delayed-release cold ice crystal material based on the polymer water-absorbent resin of the present invention includes, by weight, 200-300 parts by weight of sodium polyacrylate, 0.02-0.04 parts by weight of boric acid, 20-60 parts by weight of xylitol and 30-50 parts by weight of hydroxypropyl starch.

[0009] In order to better realize the above technical scheme, the preparation method of the polymer absorbent resin in the delayed-release cold ice crystal material based on the polymer absorbent resin of the present invention is: after uniformly mixing sodium polyacrylate, boric acid, xylitol and hydroxypropyl starch, polymerizing at 60-80°C for 4-6h, the obtained polymer is granulated, dried and crushed to obtain the polymer absorbent resin.

[0010] In order to better realize the above technical scheme, the humectant in the delayed cold-release ice crystal material based on the polymer water-absorbing resin of the present invention is at least one of sorbitol, sorbitol and pyrrolidone carboxylic acid.

[0011] In order to better realize the above technical scheme, the crosslinking agent in the delayed cold-release ice crystal material based on polymer water-absorbing resin of the present invention is at least one of N,N'-methylene bisacrylamide, N-hydroxyethyl acrylamide and polyethylene glycol diacrylic acid.

[0012] In order to better realize the above technical scheme, the preservative in the delayed cold-release ice crystal material based on the polymer water-absorbing resin of the present invention is at least one of kason, sodium benzoate and isothiazolin.

[0013] The second object of the present invention is to provide a method for preparing a delayed-release cold-release ice crystal material based on a polymer water-absorbing resin, the technical point of which is that it comprises the following steps:

[0014] Step 1: Add a polymer water-absorbing resin into an appropriate amount of water and stir until the resin is completely dissolved to form a uniform water-absorbing resin liquid;

[0015] Step 2, mixing water, a moisturizing agent, a cross-linking agent and a preservative uniformly to form a liquid mixture;

[0016] Step 3, mixing the water-absorbing resin liquid of step 1 and the liquid mixture of step 2, so that the resin absorbs water and swells, and uniformly infiltrating the liquid mixture into the resin for activation to obtain the delayed cold-release ice crystal material;

[0017] Step 3: Place the delayed-release ice crystal material in a suitable closed container to prevent leakage, and seal it tightly.

[0018] Compared with the prior art, the delayed cold-release ice crystal material based on a polymer water-absorbing resin and the preparation method thereof of the present invention have the following beneficial effects:

[0019] The delayed-release cold-release ice crystal material based on a polymer water-absorbent resin of the present invention comprises water and additives, wherein the additives comprise a polymer water-absorbent resin as the main component of water absorption performance, a humectant for improving the wettability and water retention of the material, a cross-linking agent for enhancing the network structure of the polymer water-absorbent resin, and a preservative for preventing the material from getting moldy and corrupted during long-term storage. This delayed-release cold-release ice crystal material can continuously release cold air after activation, providing a continuous cooling effect, and is suitable for the production of various cooling products. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Example 1

[0022] A delayed-release cold-release ice crystal material based on a polymer water-absorbing resin comprises water and an additive, wherein the additive is added in an amount of 12.5 wt % of the delayed-release cold-release ice crystal material. Calculated by weight, the additive comprises 20 kg of the polymer water-absorbing resin, 2 kg of a moisturizer, 2 kg of a cross-linking agent and 0.55 kg of a preservative.

[0023] Furthermore, the amount of the delayed cooling-release ice crystal material based on the polymer water-absorbing resin in this embodiment also includes 2 kg of cooling liquid.

[0024] Furthermore, the cooling liquid in the delayed cooling-release ice crystal material based on the polymer water-absorbing resin of this embodiment is glycerol.

[0025] Furthermore, the polymer water-absorbent resin in the delayed-release cold ice crystal material based on the polymer water-absorbent resin of the present embodiment includes, by weight, 250 kg of sodium polyacrylate, 0.03 kg of boric acid, 35 kg of xylitol and 40 kg of hydroxypropyl starch.

[0026] Preferably, the preparation method of the polymer absorbent resin in the delayed-release ice crystal material based on the polymer absorbent resin in this embodiment is: after uniformly mixing sodium polyacrylate, boric acid, xylitol and hydroxypropyl starch, polymerize them at 70°C for 5 hours, and obtain the polymer, which is granulated, dried and crushed to obtain the polymer absorbent resin.

[0027] Furthermore, the moisturizing agent in the delayed cooling-release ice crystal material based on the polymer water-absorbing resin of this embodiment is sorbitol.

[0028] Furthermore, the cross-linking agent in the delayed cooling-release ice crystal material based on the polymer water-absorbing resin of this embodiment is N,N'-methylenebisacrylamide.

[0029] Furthermore, the preservative in the delayed-release ice crystal material based on the polymer water-absorbing resin of this embodiment is kasone.

[0030] The preparation method of the delayed cold-release ice crystal material of the polymer water-absorbing resin of the present embodiment comprises the following steps:

[0031] Step 1: Add a polymer water-absorbing resin into an appropriate amount of water and stir until the resin is completely dissolved to form a uniform water-absorbing resin liquid;

[0032] Step 2, mixing water, a moisturizing agent, a cross-linking agent and a preservative uniformly to form a liquid mixture;

[0033] Step 3, mixing the water-absorbing resin liquid of step 1 and the liquid mixture of step 2, so that the resin absorbs water and swells, and uniformly infiltrating the liquid mixture into the resin for activation to obtain the delayed cold-release ice crystal material;

[0034] Step 3: Place the delayed-release ice crystal material in a suitable closed container to prevent leakage, and seal it tightly.

[0035] Example 2

[0036] A delayed-release cold-release ice crystal material based on a polymer water-absorbing resin comprises water and an additive, wherein the additive is added in an amount of 10 wt % of the delayed-release cold-release ice crystal material. In parts by weight, the additive comprises 10 kg of the polymer water-absorbing resin, 1 kg of a moisturizer, 1 kg of a cross-linking agent and 0.5 kg of a preservative.

[0037] Furthermore, the polymer water-absorbent resin in the delayed-release cold ice crystal material based on the polymer water-absorbent resin of the present embodiment includes, by weight, 200 kg of sodium polyacrylate, 0.02 kg of boric acid, 20 kg of xylitol and 30 kg of hydroxypropyl starch.

[0038] Preferably, the preparation method of the polymer water-absorbent resin in the delayed-release ice crystal material based on the polymer water-absorbent resin of this embodiment is: after uniformly mixing sodium polyacrylate, boric acid, xylitol and hydroxypropyl starch, polymerize them at 60°C for 6 hours, and obtain the polymer, which is granulated, dried and crushed to obtain the polymer water-absorbent resin.

[0039] Furthermore, the moisturizing agent in the delayed cold-release ice crystal material based on the polymer water-absorbing resin of this embodiment is sorbitol.

[0040] Furthermore, the cross-linking agent in the delayed cooling and releasing ice crystal material based on the polymer water-absorbing resin of this embodiment is N-hydroxyethyl acrylamide.

[0041] Furthermore, the preservative in the delayed-release cold-release ice crystal material based on the polymer water-absorbing resin of this embodiment is sodium benzoate.

[0042] The preparation method of the delayed cold-release ice crystal material of the polymer water-absorbing resin of the present embodiment comprises the following steps:

[0043] Step 1: Add a polymer water-absorbing resin into an appropriate amount of water and stir until the resin is completely dissolved to form a uniform water-absorbing resin liquid;

[0044] Step 2, mixing water, a moisturizing agent, a cross-linking agent and a preservative uniformly to form a liquid mixture;

[0045] Step 3, mixing the water-absorbing resin liquid of step 1 and the liquid mixture of step 2, so that the resin absorbs water and swells, and uniformly infiltrating the liquid mixture into the resin for activation to obtain the delayed cold-release ice crystal material;

[0046] Step 3: Place the delayed-release ice crystal material in a suitable closed container to prevent leakage, and seal it tightly.

[0047] Example 3

[0048] A delayed-release cold-release ice crystal material based on a polymer water-absorbing resin comprises water and an additive, wherein the additive is added in an amount of 15wt% of the delayed-release cold-release ice crystal material. Calculated by weight, the additive comprises 30kg of the polymer water-absorbing resin, 3kg of a moisturizer, 3kg of a cross-linking agent and 0.6kg of a preservative.

[0049] Furthermore, the polymer water-absorbent resin in the delayed-release cold ice crystal material based on the polymer water-absorbent resin of the present embodiment includes, by weight, 300 kg of sodium polyacrylate, 0.04 kg of boric acid, 60 kg of xylitol and 50 kg of hydroxypropyl starch.

[0050] Preferably, the preparation method of the polymer water-absorbent resin in the delayed-release ice crystal material based on the polymer water-absorbent resin of this embodiment is: after uniformly mixing sodium polyacrylate, boric acid, xylitol and hydroxypropyl starch, polymerize them at 80°C for 4 hours, and obtain the polymer, which is granulated, dried and crushed to obtain the polymer water-absorbent resin.

[0051] Furthermore, the moisturizing agent in the delayed cold-release ice crystal material based on the polymer water-absorbing resin of this embodiment is pyrrolidone carboxylic acid.

[0052] Furthermore, the cross-linking agent in the delayed cooling and releasing ice crystal material based on the polymer water-absorbing resin of this embodiment is polyethylene glycol diacrylate.

[0053] Furthermore, the preservative in the delayed-release cold-cold ice crystal material based on the polymer water-absorbing resin of this embodiment is isothiazolin.

[0054] The preparation method of the delayed cold-release ice crystal material of the polymer water-absorbing resin of the present embodiment comprises the following steps:

[0055] Step 1: Add a polymer water-absorbing resin into an appropriate amount of water and stir until the resin is completely dissolved to form a uniform water-absorbing resin liquid;

[0056] Step 2, mixing water, a moisturizing agent, a cross-linking agent and a preservative uniformly to form a liquid mixture;

[0057] Step 3, mixing the water-absorbing resin liquid of step 1 and the liquid mixture of step 2, so that the resin absorbs water and swells, and uniformly infiltrating the liquid mixture into the resin for activation to obtain the delayed cold-release ice crystal material;

[0058] Step 3: Place the delayed-release ice crystal material in a suitable closed container to prevent leakage, and seal it tightly.

[0059] Comparative Example 1

[0060] The "additives include 20 kg of high molecular water-absorbing resin, 2 kg of humectant, 2 kg of cross-linking agent and 0.55 kg of preservative" in Example 1 is changed to "additives include 20 kg of high molecular water-absorbing resin, 4 kg of cross-linking agent and 0.55 kg of preservative", and the remaining operations are the same as Example 1.

[0061] Test example

[0062] The delayed cooling-release ice crystal materials of Examples 1-3 and Comparative Example 1 that have stored cold are placed on a laboratory bench to ensure that the samples are not disturbed by external heat or cold sources. A temperature sensor is placed near the delayed cooling-release ice crystal material to ensure that the temperature of the cold air released by the delayed cooling-release ice crystal material can be accurately measured. A data logger is connected to the temperature sensor to sample the temperature every minute until the temperature stops decreasing or starts to rise slightly, and the cooling-release time is recorded. The specific experimental results are as follows:

[0063] Table 1

[0064] Example 1 Example 2 Example 3 Comparative Example 1 Cooling time / h 22 20 19 15

[0065] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A delayed-release cold-release ice crystal material based on a polymer water-absorbing resin, comprising water and an additive, wherein the additive comprises a polymer water-absorbing resin, characterized in that: The additive is added in an amount of 10-15wt% of the delayed-release ice crystal material. In terms of weight parts, the additive includes 10-30 weight parts of a high molecular weight water-absorbing resin, 1-3 weight parts of a moisturizer, 1-3 weight parts of a cross-linking agent and 0.5-0.6 weight parts of a preservative.

2. The delayed-release ice crystal material based on a polymer water-absorbing resin according to claim 1, characterized in that: The added amount also includes 1-3 parts by weight of cooling liquid.

3. The delayed cold-release ice crystal material based on a polymer water-absorbing resin according to claim 2, characterized in that: The cooling liquid is at least one of glycerol, ethylene glycol and propylene glycol.

4. The delayed-release ice crystal material based on a polymer water-absorbing resin according to claim 1, characterized in that: The polymer water-absorbing resin comprises, by weight, 200-300 parts of sodium polyacrylate, 0.02-0.04 parts of boric acid, 20-60 parts of xylitol and 30-50 parts of hydroxypropyl starch.

5. The delayed cold-release ice crystal material based on a polymer water-absorbing resin according to claim 4, characterized in that: The preparation method of the polymer water-absorbing resin is as follows: sodium polyacrylate, boric acid, xylitol and hydroxypropyl starch are uniformly mixed and polymerized at 60-80° C. for 4-6 hours to obtain a polymer, which is granulated, dried and crushed to obtain the polymer water-absorbing resin.

6. The delayed cold-release ice crystal material based on a polymer water-absorbing resin according to claim 1, characterized in that: The moisturizing agent is at least one of sorbitol, sorbitol and pyrrolidone carboxylic acid.

7. The delayed-release cold-release ice crystal material based on a polymer water-absorbing resin according to claim 1, characterized in that: The cross-linking agent is at least one of N,N'-methylene bisacrylamide, N-hydroxyethyl acrylamide and polyethylene glycol diacrylamide.

8. The delayed-release ice crystal material based on a polymer water-absorbing resin according to claim 1, characterized in that: The preservative is at least one of kasone, sodium benzoate and isothiazolin.

9. A method for preparing a delayed-release cold-release ice crystal material based on a polymer water-absorbing resin, characterized in that: The following steps are involved: Step 1: Add a polymer water-absorbing resin into an appropriate amount of water and stir until the resin is completely dissolved to form a uniform water-absorbing resin liquid; Step 2, mixing water, a moisturizing agent, a cross-linking agent and a preservative uniformly to form a liquid mixture; Step 3, mixing the water-absorbing resin liquid of step 1 and the liquid mixture of step 2, so that the resin absorbs water and swells, and uniformly infiltrating the liquid mixture into the resin for activation to obtain the delayed cold-release ice crystal material; Step 3: Place the delayed-release ice crystal material in a suitable closed container to prevent leakage, and seal it tightly.