A method for preparing a decompression crust mastic

Abstract

The application provides a preparation method of a decompression crusty cement, which comprises the following steps: firstly, stirring deionized water and a cementing agent to completely dissolve the cementing agent, then adding a humectant and a preservative after cooling, then adding a crosslinking agent to perform a crosslinking reaction, and finally adding functional additives in batches to obtain the cement after stirring and discharging, performing surface treatment on the cement by using a film forming agent, and obtaining the crusty shell after solidification of the film forming agent, namely the decompression crusty cement. The decompression crusty cement prepared by the preparation method has good stability, is not easy to hydrate, has good tensile properties and elongation at break, is not easy to break after stress extrusion or stretching, has a smooth hand feeling, is easy to knead and crush, and has a clear and crisp cement shell, the shell is easy to knead and crush to emit a clear and crisp sound, and has the decompression purpose.

Description

Technical Field

[0001] This invention relates to the field of decompression toys, specifically to the technical field of A63H33 / 00, and more specifically to a method for preparing decompression brittle clay. Background Technology

[0002] There are many types of clay toys available on the market, including crystal clay, bubble wrap, pearlescent clay, and modeling clay. In recent years, a type of stress-relieving clay with a crisp outer shell and a soft interior has also appeared on the market. However, in pursuit of the stress-relieving effect of the outer shell, these stress-relieving clay toys often neglect the quality of the clay inside, resulting in problems such as stickiness, easy breakage, and hydration.

[0003] There are many existing methods for preparing clay toys. Chinese patent CN111393090A discloses a method for preparing non-toxic crystal clay, which involves melting ultra-light clay in hot water to obtain a clay solution, then adding glue, baking soda, pigments, etc., and stirring until homogeneous to obtain non-toxic crystal clay. Chinese patent CN111870972A discloses a method for preparing foaming adhesive, which involves mixing glue and additives in a volume ratio of 1:(1-1.5) and allowing it to stand at 25°C to obtain the foaming adhesive. These methods are too simplistic and offer limited guidance on controlling specific conditions during the preparation process to obtain clay toys with good stability and resistance to hydration. Furthermore, they offer limited guidance on the preparation methods for the recently emerging brittle clay. Therefore, the applicant proposes a method for preparing decompressed brittle clay. Summary of the Invention

[0004] This invention proposes a method for preparing decompression brittle clay, comprising the following steps:

[0005] (1) Preparation of adhesive emulsion: Add deionized water and adhesive to an emulsification pot, heat up to completely dissolve, cool to room temperature, then add humectant and preservative, and stir to make adhesive emulsion;

[0006] (2) Pour the above adhesive emulsion into a kneader, start stirring, add crosslinking agent and stir evenly, then slowly add functional additives, continue stirring and discharge to obtain clay;

[0007] (3) The clay is shaped and the surface of the clay is treated with a film-forming agent to form a film layer. After drying, the crispy skin adhesive of the present invention is obtained.

[0008] In a preferred embodiment, the temperature is raised to 70-95°C in step (1) to complete the dissolution.

[0009] In a preferred embodiment, the adhesive is selected from at least one of polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl acetate, guar gum, starch, xanthan gum, carrageenan, sodium alginate, and polysiloxane.

[0010] In a preferred embodiment, the adhesive is polyvinyl alcohol; more preferably, the degree of polymerization of the polyvinyl alcohol is 1700-2500; even more preferably, the degree of polymerization of the polyvinyl alcohol is 1700-1800.

[0011] In a preferred embodiment, the mass ratio of the deionized water to the adhesive is (3-9):1.

[0012] In a preferred embodiment, the mass ratio of the humectant to the crosslinking agent is (5-20):1.

[0013] In a preferred embodiment, the mass ratio of the humectant to the crosslinking agent is (10-15):1.

[0014] In a preferred embodiment, the crosslinking agent is an aqueous solution of borax, wherein the mass concentration of borax in the aqueous solution is 2 wt%.

[0015] In a preferred embodiment, the humectant is glycerin and polyethylene glycol. More preferably, the mass ratio of glycerin to polyethylene glycol is 3:4.

[0016] In a preferred embodiment, the polyethylene glycol is selected from at least one of polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 800, and polyethylene glycol 1000. More preferably, the polyethylene glycol is selected from polyethylene glycol 400.

[0017] During the experiment, the applicant found that when the mass ratio of humectant to crosslinking agent was (10-15):1, and the humectant was polyethylene glycol and glycerin, and the crosslinking agent was borax aqueous solution, the prepared putty was not easy to hydrate, nor was it easy to stick or break. The applicant speculated that the possible reason was that the addition of glycerin and polyethylene glycol increased the crosslinking density of the putty and improved the bonding strength. However, if too much glycerin and polyethylene glycol were added, it would cause the putty to become soft and mushy, reduce the tensile strength of the putty, reduce the elongation at break of the putty, and increase the stickiness of the putty.

[0018] In this application, the type of preservative added is not specifically limited, but preferably it can be phenoxyethanol.

[0019] In a preferred embodiment, the functional additives are added in batches in step (2), and each batch of functional additives needs to be stirred for 10-15 minutes.

[0020] In a preferred embodiment, the functional additive is selected from at least one of fillers and pigments.

[0021] In a preferred embodiment, the filler is selected from at least one of silica, quartz sand, silica powder, diatomaceous earth, talc, foamed microspheres, and calcium carbonate.

[0022] In a preferred embodiment, the filler is silica, and the loose packing density of the silica is 0.1-0.15 g / cm³. 3 .

[0023] In this application, the types of pigments are not specifically limited, including but not limited to carmine, iron oxide, carbon black, brilliant blue, lemon yellow, realgar, sodalite, azurite, malachite, and hedonicite.

[0024] In a preferred embodiment, the functional additive is talc or foamed microspheres.

[0025] In a preferred embodiment, the specific process for adding the functional additive in batches is as follows:

[0026] S1. Add 1 / 2 volume of the functional additive to the kneader and stir for 15 minutes;

[0027] S2. Add 1 / 4 volume of the functional additive to the kneader and stir for 10 minutes;

[0028] S3. Add 1 / 4 volume of the functional additive to the kneader and stir for 10 minutes.

[0029] During the experiment, the applicant discovered that the method of adding functional additives is closely related to the stability of the putty, especially when adding additives with a loose bulk density of 0.1-0.15 g / cm³. 3 The applicant speculates that the silica has a large number of hydroxyl groups on its surface, which tend to agglomerate within the cross-linked putty. Adding it in batches can ensure that the silica is evenly dispersed within the putty, avoiding the presence of agglomerated particles, thus improving the stability and quality of the putty.

[0030] In a preferred embodiment, the film thickness formed after treatment with the film-forming agent in step (3) is 0.1-1 mm.

[0031] In a preferred embodiment, the film-forming agent is selected from at least one of paraffin wax, beeswax, palm wax, gypsum aqueous solution, epoxy resin, modified epoxy resin, acrylic resin, epoxy-modified acrylic resin, polyurethane resin, and modified polyurethane resin.

[0032] In a preferred embodiment, the drying method in step (3) is selected from natural drying, low-temperature air drying, and ultraviolet curing.

[0033] During the experiment, the applicant discovered that paraffin wax, beeswax, palm wax, gypsum aqueous solution, epoxy resin, modified epoxy resin, acrylic resin, epoxy-modified acrylic resin, polyurethane resin, and modified polyurethane resin can all be used as film-forming agents for the outer shell of the putty. However, different types of shell-forming agents have different drying methods, and the appearance of the shell formed after the film-forming agent has been cured is significantly different. Paraffin wax, beeswax, palm wax, and other materials can form a film after being coated and cooled to room temperature. The shell formed after curing is smooth, delicate, easy to crush, and has a relatively thick film layer. Epoxy resin, modified epoxy resin, and polyurethane resin can be cured at room temperature after being coated. The shell formed after epoxy-modified acrylic resin and acrylic resin are cured by ultraviolet light is smooth, has a strong gloss, a thin film layer, and makes a crisper sound when crushed than the shell formed by materials such as paraffin wax.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The crispy clay preparation process proposed in this invention controls the amount of wetting agent and crosslinking agent, and combines it with the batch addition of functional additives to improve the stability of the prepared clay and reduce the hydration phenomenon. The prepared crispy clay is not sticky and has a high crosslinking density, which improves the elongation at break. The clay is not easy to break under stress and has good stability and toughness. At the same time, it has a smooth, easy-to-crush, and crisp clay shell. The shell makes a crisp sound when crushed, which can be used for decompression. Detailed Implementation

[0036] Example 1

[0037] This embodiment proposes a method for preparing decompressed brittle clay, including the following steps:

[0038] (1) Preparation of adhesive emulsion: Add deionized water and polyvinyl alcohol in a mass ratio of 8:1 to an emulsification pot, heat to 95°C, stir until polyvinyl alcohol dissolves, cool to room temperature, then add humectant and phenoxyethanol, and stir to prepare adhesive emulsion.

[0039] (2) Pour the above adhesive emulsion into a kneader, start stirring, add crosslinking agent and stir for 15 minutes until uniform;

[0040] (3) Add 1 / 2 volume of the functional additive to the kneader and stir for 15 minutes;

[0041] (4) Add 1 / 4 volume of the functional additive to the kneader and stir for 10 minutes;

[0042] (5) Add 1 / 4 volume of the functional additive to the kneader and stir for 10 minutes;

[0043] (6) The mixed clay is shaped and then a film-forming agent is applied to the surface of the clay to form a film layer with a thickness of 1 mm. After drying, the crispy skin glue of the present invention is obtained.

[0044] The polyvinyl alcohol used was model 1788, purchased from Shandong Chuxin Chemical, and added in 9 parts by weight.

[0045] The mass ratio of phenoxyethanol to polyvinyl alcohol is 1:18.

[0046] The mass ratio of humectant to crosslinking agent is 13:1. The humectant is glycerin and polyethylene glycol 400 in a mass ratio of 3:4. The crosslinking agent is a borax aqueous solution with a borax mass concentration of 2wt%.

[0047] The mass ratio of humectant to polyvinyl alcohol is 1.3:1.

[0048] The functional additive is talc powder, purchased from Guangdong Yuanlei Powder Co., Ltd., with an average particle size of 10,000 mesh. The mass ratio of the functional additive to polyvinyl alcohol is 1.5:1.

[0049] The film-forming agent is beeswax, and the film will form after cooling to room temperature after coating.

[0050] The crispy clay prepared in this embodiment is stable, non-sticky, and does not easily hydrate. It is not easily broken after being squeezed or stretched. The outer shell of the clay is smooth to the touch, easy to crush, and produces a crisp sound.

[0051] Example 2

[0052] This embodiment proposes a method for preparing decompressed brittle clay, including the following steps:

[0053] (1) Preparation of adhesive emulsion: Add deionized water and polyvinyl alcohol in a mass ratio of 8:1 to an emulsification pot, heat to 95°C, stir until polyvinyl alcohol dissolves, cool to room temperature, then add humectant and phenoxyethanol, and stir to prepare adhesive emulsion.

[0054] (2) Pour the above adhesive emulsion into a kneader, start stirring, add crosslinking agent and stir for 15 minutes until uniform;

[0055] (3) Add 1 / 2 volume of the functional additive to the kneader and stir for 15 minutes;

[0056] (4) Add 1 / 4 volume of the functional additive to the kneader and stir for 10 minutes;

[0057] (5) Add 1 / 4 volume of the functional additive to the kneader and stir for 10 minutes;

[0058] (6) The mixed clay is shaped and then a film-forming agent is applied to the surface of the clay to form a film layer with a thickness of 1 mm. After drying, the crispy skin glue of the present invention is obtained.

[0059] The polyvinyl alcohol used was model 1788, purchased from Shandong Chuxin Chemical, and added in 9 parts by weight.

[0060] The mass ratio of phenoxyethanol to polyvinyl alcohol is 1:18.

[0061] The mass ratio of humectant to crosslinking agent is 13:1. The humectant is glycerin and polyethylene glycol 400 in a mass ratio of 3:4. The crosslinking agent is a borax aqueous solution with a borax mass concentration of 2wt%.

[0062] The mass ratio of humectant to polyvinyl alcohol is 1.3:1.

[0063] The functional additive is foamed microspheres, purchased from Bolicken in the United States, with an average particle size of 10-20 μm. The mass ratio of the functional additive to polyvinyl alcohol is 1.5:1.

[0064] The film-forming agent is beeswax, and the film will form after cooling to room temperature after coating.

[0065] The crispy clay prepared in this embodiment is stable, non-sticky, and does not easily hydrate. It is not easily broken after being squeezed or stretched. The outer shell of the clay is smooth to the touch, easy to crush, and produces a crisp sound.

[0066] Example 3

[0067] This embodiment proposes a method for preparing decompressed brittle clay, including the following steps:

[0068] (1) Preparation of adhesive emulsion: Add deionized water and polyvinyl alcohol in a mass ratio of 8:1 to an emulsification pot, heat to 95°C, stir until polyvinyl alcohol dissolves, cool to room temperature, then add humectant and phenoxyethanol, and stir to prepare adhesive emulsion.

[0069] (2) Pour the above adhesive emulsion into a kneader, start stirring, add crosslinking agent and stir for 15 minutes until uniform;

[0070] (3) Add 1 / 2 volume of the functional additive to the kneader and stir for 15 minutes;

[0071] (4) Add 1 / 4 volume of the functional additive to the kneader and stir for 10 minutes;

[0072] (5) Add 1 / 4 volume of the functional additive to the kneader and stir for 10 minutes;

[0073] (6) The mixed clay is shaped and then a film-forming agent is applied to the surface of the clay to form a film layer with a thickness of 1 mm. After drying, the crispy skin glue of the present invention is obtained.

[0074] The polyvinyl alcohol used was model 1788, purchased from Shandong Chuxin Chemical, and added in 9 parts by weight.

[0075] The mass ratio of phenoxyethanol to polyvinyl alcohol is 1:18.

[0076] The mass ratio of humectant to crosslinking agent is 13:1. The humectant is glycerin, and the crosslinking agent is a 2wt% borax aqueous solution.

[0077] The mass ratio of humectant to polyvinyl alcohol is 1.3:1.

[0078] The functional additive is foamed microspheres, purchased from Bolicken in the United States, with an average particle size of 10-20 μm. The mass ratio of the functional additive to polyvinyl alcohol is 1.5:1.

[0079] The film-forming agent is beeswax, and the film will form after cooling to room temperature after coating.

[0080] The crispy clay prepared in this embodiment is stable, non-sticky, and does not easily hydrate. It is easy to break after being squeezed or stretched. The outer shell of the clay is smooth to the touch, easy to crush, and makes a crisp sound.

[0081] Example 4

[0082] This embodiment proposes a method for preparing decompressed brittle clay, including the following steps:

[0083] (1) Preparation of adhesive emulsion: Add deionized water and polyvinyl alcohol in a mass ratio of 8:1 to an emulsification pot, heat to 95°C, stir until polyvinyl alcohol dissolves, cool to room temperature, then add humectant and phenoxyethanol, and stir to prepare adhesive emulsion.

[0084] (2) Pour the above adhesive emulsion into a kneader, start stirring, add crosslinking agent and stir for 15 minutes until uniform;

[0085] (3) Add 1 / 2 volume of the functional additive to the kneader and stir for 15 minutes;

[0086] (4) Add 1 / 4 volume of the functional additive to the kneader and stir for 10 minutes;

[0087] (5) Add 1 / 4 volume of the functional additive to the kneader and stir for 10 minutes;

[0088] (6) The mixed clay is shaped and then a film-forming agent is applied to the surface of the clay to form a film layer with a thickness of 1 mm. After drying, the crispy skin glue of the present invention is obtained.

[0089] The polyvinyl alcohol used was model 1788, purchased from Shandong Chuxin Chemical, and added in 9 parts by weight.

[0090] The mass ratio of phenoxyethanol to polyvinyl alcohol is 1:18.

[0091] The mass ratio of humectant to crosslinking agent is 13:1. The humectant is glycerin and polyethylene glycol 400 in a mass ratio of 3:4. The crosslinking agent is a borax aqueous solution with a borax mass concentration of 2wt%.

[0092] The mass ratio of humectant to polyvinyl alcohol is 1.3:1.

[0093] The functional additive is foamed microspheres, purchased from Bolicken in the United States, with an average particle size of 10-20 μm. The mass ratio of the functional additive to polyvinyl alcohol is 1.5:1.

[0094] The film-forming agent was epoxy-modified acrylic resin, purchased from Anhui Zhongen Chemical Co., Ltd., model WF-600, and the drying method was ultraviolet curing.

[0095] The crispy clay prepared in this embodiment is stable, non-sticky, and does not easily hydrate. It is not easily broken after being squeezed or stretched. The outer shell of the clay is smooth to the touch, easy to crush, and makes a crisp sound.

[0096] Example 5

[0097] This embodiment proposes a method for preparing decompressed brittle clay, including the following steps:

[0098] (1) Preparation of adhesive emulsion: Add deionized water and polyvinyl alcohol in a mass ratio of 8:1 to an emulsification pot, heat to 95°C, stir until polyvinyl alcohol dissolves, cool to room temperature, then add humectant and phenoxyethanol, and stir to prepare adhesive emulsion.

[0099] (2) Pour the above adhesive emulsion into a kneader, start stirring, add crosslinking agent and stir for 15 minutes until uniform;

[0100] (3) Add the functional additives to the kneader and stir for 20 minutes;

[0101] (4) The mixed clay is shaped and then a film-forming agent is applied to the surface of the clay to form a film layer with a thickness of 1 mm. After drying, the crispy skin glue of the present invention is obtained.

[0102] The polyvinyl alcohol used was model 1788, purchased from Shandong Chuxin Chemical, and added in 9 parts by weight.

[0103] The mass ratio of phenoxyethanol to polyvinyl alcohol is 1:18.

[0104] The mass ratio of humectant to crosslinking agent is 13:1. The humectant is glycerin and polyethylene glycol 400 in a mass ratio of 3:4. The crosslinking agent is a borax aqueous solution with a borax mass concentration of 2wt%.

[0105] The mass ratio of humectant to polyvinyl alcohol is 1.3:1.

[0106] The functional additive is foamed microspheres, purchased from Bolicken in the United States, with an average particle size of 10-20 μm. The mass ratio of the functional additive to polyvinyl alcohol is 1.5:1.

[0107] The film-forming agent was epoxy-modified acrylic resin, purchased from Anhui Zhongen Chemical Co., Ltd., model WF-600, and the drying method was ultraviolet curing.

[0108] The brittle clay prepared in this embodiment has scattered agglomerated particles in it, and the clay is not very stable. It is easy to break after being squeezed or stretched.

Claims

1. A method of preparing a decompression crust daub, characterized in that, The method comprises the following steps: (1) preparing an adhesive emulsion: adding deionized water and an adhesive into an emulsifying kettle, heating, completely dissolving, cooling to room temperature, then adding a humectant and a preservative, and stirring to prepare the adhesive emulsion; (2) pouring the adhesive emulsion into a kneader, starting stirring, adding a crosslinking agent and stirring uniformly, then slowly adding functional additives, continuing stirring and discharging to obtain a mastic; (3) molding the mastic, treating the surface of the mastic with a film-forming agent to form a film layer, and drying to obtain the mastic with a crust; the functional additives are added in batches in step (2), and each batch of the functional additives needs to be stirred for 10-15 min; the specific process of adding the functional additives in batches is as follows: S1, adding 1 / 2 volume of the functional additives into the kneader and stirring for 10-15 min; S2, adding 1 / 4 volume of the functional additives into the kneader and stirring for 10-15 min; S3, adding 1 / 4 volume of the functional additives into the kneader and stirring for 10-15 min; the mass ratio of the humectant to the crosslinking agent is (10-15):1; the adhesive is at least one selected from polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl acetate, guar gum, starch, xanthan gum, carrageenan, sodium alginate and polysiloxane; the crosslinking agent is a borax aqueous solution; the humectant is glycerol and polyethylene glycol, and the mass ratio of the glycerol to the polyethylene glycol is 3:

4.

2. The production method according to claim 1, characterized by, in step (1), the temperature is raised to 70-95 DEG C to complete the dissolution.

3. The method of any one of claims 1-2, wherein, the functional additives are at least one selected from fillers and pigments.

4. The production method according to claim 1, characterized by, in step (3), the film layer formed after the treatment of the film-forming agent has a thickness of 0.1-1 mm.

5. The preparation method according to claim 1, characterized in that, in step (3), the drying mode comprises one of natural drying, low-temperature air drying and ultraviolet light curing.

6. The method of claim 1, wherein, the film-forming agent is at least one selected from paraffin wax, beeswax, palm wax, gypsum aqueous solution, epoxy resin, modified epoxy resin, acrylic resin, epoxy-modified acrylic resin, polyurethane resin and modified polyurethane resin.