Toy washed sand and preparation method thereof

Abstract

The present application relates to the technical field of toy sand, and specifically discloses a toy washed sand and a preparation method thereof. The toy washed sand comprises the following raw materials in parts by weight: 50-70 parts of quartz sand, 10-15 parts of epoxy resin glue, 2-3 parts of polyamide curing agent, 10-15 parts of polyvinyl acetate glue, 4-5 parts of acetylcitrate tributyl, 5-6 parts of white oil, 2-3 parts of hydrophobic fumed silica, and 2-3 parts of phenyl silicone oil. The washed sand of the present application has excellent storage stability and performance, can improve its service life, and meets market demand.

Description

Technical Field

[0001] The present application relates to the technical field of toy sand, and more specifically, to toy washed sand and a preparation method thereof. Background Art

[0002] Toy sand, also known as space sand, is widely loved by users because of its simple operation and low price. When playing with toy sand, children will use their fingers and palms to perform a series of fine movements, such as pinching, kneading, digging, etc. Through this process, it helps to improve children's hand-eye coordination and logical thinking ability.

[0003] At present, toy sand can be prepared from sea sand, plastic granular sand, silicone oil, borax, etc. And the prepared toy sand has good fluidity. However, the service life of such toy sand is short. Summary of the invention

[0004] In order to improve the storage stability and performance of toy sand, and thus increase its service life, the present application provides a toy washed sand and a preparation method thereof.

[0005] In the first aspect, the present application provides a toy washed sand, adopting the following technical scheme: the toy washed sand comprises the following raw materials in parts by weight: 50-70 parts of quartz sand, 10-15 parts of epoxy resin glue, 2-3 parts of polyamide curing agent, 10-15 parts of polyvinyl acetate glue, 4-5 parts of acetyl tributyl citrate, 5-6 parts of white oil, 2-3 parts of hydrophobic fumed silica, and 2-3 parts of phenyl silicone oil.

[0006] By adopting the above technical scheme, the prepared washed sand has excellent storage stability and excellent performance. The storage stability of the washed sand is achieved within 2 years without hardening, mildew or agglomeration; the anti-freezing performance is achieved that most or all of the washed sand can be restored to its original state after freezing; the dry hardness performance can maintain or restore to its original state within -20 to 40°C with temperature changes, and will not affect the use; the humidity test has achieved that the sand particles do not appear or appear slightly loose under 25-60% humidity; the integrity of the work is that there is no obvious cracking, deformation or potholes on the surface after shaping; the washing performance is that it can be restored after washing and does not fade. The washed sand of this application significantly improves its storage performance and performance through the synergistic effect between the raw materials, which can increase its service life and meet market demand.

[0007] In this application, quartz sand is used as the core structure. Quartz sand has the advantages of hardness, wear resistance, stable chemical properties, etc., and has the characteristics of high temperature resistance, high insulation, corrosion resistance, piezoelectric effect, etc., so as to improve the service life of washed sand. Epoxy resin glue has excellent adhesive properties and tolerance to impact vibration and bending fatigue, which can improve the adhesion between washed sand and reduce the phenomenon of sand glue peeling. The polyvinyl acetate prepared in this application has excellent waterproofness and water resistance, and polyvinyl acetate glue is non-toxic and can be safely used in children's handicraft projects and food contact surface applications. In addition, polyvinyl acetate glue also has excellent flexibility, which makes washed sand have a thixotropic effect, and makes washed sand fluffy, soft and waterproof. Phenyl silicone oil has excellent heat resistance, cold resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertness and small surface tension, which can further improve the service life of washed sand. White oil is insoluble in water and forms a smooth film on the surface of the washed sand, so that the washed sand has the property of not sticking to hands. Therefore, the toy washed sand prepared by the above raw materials has a good use effect.

[0008] Moreover, through the production of different proportions, the toy sand will not get dirty as the use time and temperature change. When used in water, the sand glue will not peel off, which can increase the service life of the finished product. At the same time, when using washed sand, it will not be affected by temperature and humidity, so that washed sand can be used in a variety of environments. In addition, washed sand has a fluffy nature and can also absorb odors.

[0009] It should also be noted that there is a synergistic effect between polyvinyl acetate glue and epoxy resin glue, which makes the washed sand have excellent adhesion properties and can reduce the phenomenon of sand-glue peeling. In addition, due to the waterproof performance and flexibility of polyvinyl acetate glue, it can avoid the problems of washed sand being too sticky, too hard, and difficult to operate due to its strong adhesion. In addition, phenyl silicone oil has good compatibility with polyvinyl acetate glue, which further improves the softness and hydrophobicity of washed sand. Furthermore, polyvinyl acetate glue, epoxy resin glue and neutral can form intermolecular forces with white oil, so that white oil can be stably coated on the surface of washed sand, improving the waterproofness and usability of washed sand.

[0010] Optionally, the polyvinyl acetate glue comprises the following raw materials in parts by weight: 20-30 parts of vinyl acetate, 4-7 parts of dibutyl itaconate, 0.1-0.3 parts of dibenzoyl peroxide, and 15-20 parts of acetyl tributyl citrate.

[0011] Optionally, the polyvinyl acetate glue is prepared by the following method: dehydrating vinyl acetate monomer under vacuum conditions; adding dibutyl itaconate to the dehydrated vinyl acetate monomer under stirring conditions, stirring for 20-35 minutes to obtain a mixture 1; adding dibenzoyl peroxide to the mixture 1, stirring at 80-90°C for 1-3 hours to obtain a main agent; mixing the main agent with acetyl tributyl citrate, stirring for 1-2 hours to obtain the polyvinyl acetate glue.

[0012] Optionally, the dehydration temperature of vinyl acetate monomer is 110-120° C., and the dehydration time is 3 hours.

[0013] By adopting the above technical solution, the vinyl acetate monomer is dehydrated under high temperature environment, which can greatly shorten the dehydration time of vinyl acetate and facilitate the acquisition of the main agent. The main agent has good adhesion and the property of solidifying at room temperature, which can avoid the problem of sand glue peeling when the washed sand is used.

[0014] Optionally, the polyvinyl acetate glue further comprises the following raw materials in parts by weight: 8-15 parts of methanol and 2-4 parts of acetic acid.

[0015] Optionally, the polyvinyl acetate glue is prepared by the following method: methanol and vinyl acetate monomers are mixed evenly, dibutyl itaconate and acetic acid are added to obtain mixture 2; dibenzoyl peroxide is added to mixture 2, and stirred at 80-90°C for 1-3h to obtain a main agent with a polymerization degree of 400-450; the main agent is mixed with acetyl tributyl citrate, and stirred for 1-2h to obtain the polyvinyl acetate glue.

[0016] By adopting the above technical solution, vinyl acetate monomer and dibutyl itaconate are polymerized to obtain a main agent, and then dibenzoyl peroxide as an initiator is added to carry out polymerization and stirring, so that the vinyl acetate monomer and dibutyl itaconate react, and the main agent is obtained by heating the mixture 2. By adding the initiator dibenzoyl peroxide, the reaction time can be shortened, and the prepared polyvinyl acetate glue has good adhesion properties.

[0017] Optionally, the epoxy resin glue is prepared by polyamide epoxy resin and a curing agent, and the curing agent is a polyamide type curing agent.

[0018] By adopting the above technical scheme, the epoxy resin glue has excellent adhesive properties and can withstand impact vibration and bending fatigue, can improve the adhesion performance between washed sand, and reduce the phenomenon of sand-glue peeling.

[0019] In a second aspect, the present application provides a method for preparing toy washed sand, using the following technical solution:

[0020] A method for preparing toy washed sand comprises the following steps: kneading, stirring, cross-linking and premixing epoxy resin glue, phenyl silicone oil, quartz sand and hydrophobic fumed silica to obtain a semi-finished product; heating and stirring the semi-finished product, polyvinyl acetate glue and white oil to obtain the toy washed sand.

[0021] By adopting the above technical scheme, the surface of the prepared washed sand is coated with polyvinyl acetate glue and white oil, so that the washed sand has good water adhesion and waterproof properties, and the washed sand will not peel off in water. At the same time, it does not stick to hands, which can improve the service life of the washed sand and the user experience.

[0022] Optionally, the epoxy resin glue, phenyl silicone oil, quartz sand, and hydrophobic fumed silica are kneaded, stirred, cross-linked, and pre-mixed to obtain a semi-finished product, including: stirring and kneading the epoxy resin glue and quartz sand to obtain a mixture 3; adding hydrophobic fumed silica to the mixture 3, continuing to stir and knead, and then adding phenyl silicone oil after 1-1.5 hours, discharging, and obtaining a semi-finished product.

[0023] By adopting the above technical solution, the quartz sand can be fully mixed with the epoxy resin glue, and the adhesion between the quartz sands is improved, so that the washed sand has excellent performance. And the phenyl silicone oil is added later, so that the washed sand has excellent waterproof performance.

[0024] Optionally, the semi-finished product is heated and stirred with polyvinyl acetate glue and white oil to obtain the toy washed sand, comprising: adding polyvinyl acetate glue to the semi-finished product, kneading and stirring at 70-100° C. for 1-1.5 hours to obtain a mixture 4; adding white oil to the mixture 4, discharging the mixture, and obtaining the toy washed sand.

[0025] By adopting the above technical solution, the surface of the semi-finished product can be coated with polyvinyl acetate. The polyvinyl acetate glue has excellent waterproofness, water resistance and flexibility, so that the washed sand has excellent waterproof and usability. The surface of the semi-finished product coated with polyvinyl acetate can be coated with white oil. The white oil has the characteristic of being insoluble in water, so that the waterproof performance of the washed sand is further improved. A layer of smooth film can be formed on the surface of the washed sand through multiple processing, so that the washed sand feels smooth and non-sticky.

[0026] In summary, this application has at least the following beneficial effects:

[0027] The toy washed sand of the present application has excellent storage stability, waterproofness and use performance through the synergistic effect between polyvinyl acetate glue, epoxy resin glue, phenyl silicone oil and white oil;

[0028] The toy washed sand of the present application is coated with white oil on the surface of the washed sand so that the white oil forms a thin film, and the white oil has the property of being insoluble in water, so that the waterproof performance of the washed sand is further improved, and the washed sand feels smooth and non-sticky. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below with reference to the embodiments.

[0030] Preparation Example

[0031] Preparation Example 1

[0032] A polyvinyl acetate glue comprises the following raw materials by weight: 25 kg of vinyl acetate, 5 kg of dibutyl itaconate, 0.1 kg of dibenzoyl peroxide, and 18 kg of acetyl tributyl citrate.

[0033] Polyvinyl acetate glue is prepared by the following method:

[0034] The vinyl acetate monomer is dehydrated at 100° C. under vacuum conditions for 2 hours; dibutyl itaconate is added to the dehydrated vinyl acetate monomer under stirring conditions, and the mixture is stirred for 35 minutes to obtain a mixture 1; dibenzoyl peroxide is added to the mixture 1, and the mixture is stirred at 90° C. for 3 hours to obtain a main agent; the main agent is mixed with acetyl tributyl citrate, and the mixture is stirred for 2 hours to obtain polyvinyl acetate glue.

[0035] Preparation Example 2

[0036] A polyvinyl acetate glue, which differs from Preparation Example 1 in that the dehydration temperature of the vinyl acetate monomer is 120° C. and the dehydration time is 3 hours, and the rest is the same as Preparation Example 1.

[0037] Preparation Example 3

[0038] A polyvinyl acetate glue, which is different from Preparation Example 1 in that the polyvinyl acetate glue further includes the following raw materials by weight: 10 kg of methanol and 2 kg of acetic acid.

[0039] And it is prepared by the following method:

[0040] Add methanol and vinyl acetate monomers into a reactor and mix them evenly; under a sealed environment, add dibutyl itaconate and acetic acid, adjust the pH of the environment to 6.5, and obtain mixture 2; add dibenzoyl peroxide to mixture 2, stir at 90°C for 3 hours, and obtain a main agent with a polymerization degree of 400-450; mix the main agent with acetyl tributyl citrate, stir for 2 hours, and obtain polyvinyl acetate glue.

[0041] Preparation Example 4

[0042] An epoxy resin glue comprises the following raw materials by weight: 30 kg of polyamide epoxy resin E51 and 28 kg of polyamide curing agent.

[0043] It is prepared by the following method:

[0044] Add polyamide epoxy resin E51 into the disperser, start the disperser to stir, add polyamide curing agent after stirring for 30 minutes, cure at room temperature, continue stirring for 1.5 hours, then stop stirring, and let it stand for 2 hours to obtain epoxy resin glue.

[0045] Example

[0046] Table 1 Content of each raw material of toy washed sand in Examples 1-4 (kg)

[0047] raw material Example 1 Example 2 Example 3 Example 4 Quartz sand 70 60 65 50 Epoxy glue 10 12 14 15 Polyamide curing agent 2 2.8 2.3 3 Polyvinyl acetate glue 15 14 13 10 Acetyl tributyl citrate 4 4.3 4.6 5 White oil 6 5.6 5.3 5 Hydrophobic Fumed Silica 2 2.2 2.8 3 Phenyl silicone oil 3 2.8 2.4 2 Example

[0048] A toy washed sand, the raw material contents of which are shown in Table 1.

[0049] Among them, quartz sand is natural crystal stone or natural silica, and the silicon dioxide content is 99.8%; the epoxy resin glue is prepared by Preparation Example 4; the polyamide curing agent is polyamide 650 curing agent, and the density is 0.98g / cm 3 , purity is 100%, item number is 68, brand number is 1189; polyvinyl acetate glue is prepared by Preparation Example 1; acetyl tributyl citrate, product model is plasticizer TBC; white oil, item number is food grade white oil, flash point is 200℃, pour point is -20℃, viscosity grade is 15, specific gravity is 0.1; hydrophobic fumed silica, specification is gas phase hydrophobicity, mesh size is nanometer level, content is 98%, model is gas phase method; phenyl silicone oil, model is 3533, item number is amino-terminated polydimethylsiloxane 3533.

[0050] A method for preparing toy washed sand comprises the following steps:

[0051] Epoxy resin glue, phenyl silicone oil, quartz sand and hydrophobic fumed silica are kneaded, stirred, cross-linked and pre-mixed to obtain a semi-finished product; the semi-finished product is heated and stirred with polyvinyl acetate glue and white oil to obtain toy washed sand.

[0052] Embodiment 2-4

[0053] The toy washed sand of Examples 2-4 is different from that of Example 1 in that the raw material contents of the toy washed sand are different, and the raw material contents of Examples 2-4 are shown in Table 1, and the rest are the same as those of Example 1.

[0054] Example 5

[0055] A toy washed sand, which is different from Example 3 in that the polyvinyl acetate glue is prepared by Preparation Example 2, and the rest is the same as Example 3.

[0056] Example 6

[0057] A toy washed sand, which is different from Example 5 in that the polyvinyl acetate glue is prepared by Preparation Example 3, and the rest is the same as Example 5.

[0058] Example 7

[0059] A toy washed sand, which is different from Example 6 in that the semi-finished product preparation method is different, and the semi-finished product is prepared by the following method: epoxy resin glue and quartz sand are stirred and kneaded in a kneader to obtain a mixture 3; hydrophobic fumed silica is added to the mixture 3, and the stirring and kneading are continued, and phenyl silicone oil is added after 1.5 hours, and the material is discharged to obtain a semi-finished product. The rest is the same as Example 6.

[0060] Example 8

[0061] A toy washed sand, which is different from Example 7 in that the method for obtaining the toy washed sand based on the semi-finished product is different, specifically: adding polyvinyl acetate glue to the semi-finished product, kneading and stirring at 90° C. for 1 hour in a kneading machine to obtain a mixture 4; adding white oil to the mixture 4, discharging the mixture, and obtaining the toy washed sand. The rest is the same as Example 7.

[0062] Comparative Example

[0063] Comparative Example 1

[0064] A toy washed sand washed material, which is different from Example 1 in that polyvinyl acetate glue is not added to the raw material, and the rest is the same as Example 1.

[0065] Comparative Example 2

[0066] A toy washed sand washed material, which is different from Example 1 in that epoxy resin glue is not added to the raw material, and the rest is the same as Example 1.

[0067] Comparative Example 3

[0068] A toy washed sand washed material, which is different from Example 1 in that phenyl silicone oil is not added to the raw material, and the rest is the same as Example 1.

[0069] Comparative Example 4

[0070] A toy washed sand washed material, which is different from Example 1 in that white oil is not added to the raw material, and the rest is the same as Example 1.

[0071] Performance testing

[0072] The 12 kinds of toy washed sands prepared in Examples 1-8 and Comparative Examples 1-4 were subjected to the following performance tests:

[0073] Storage stability test: Test the storage stability of washed sand of each toy under UV light at 35°C. According to the storage stability from good to bad, the storage stability is divided into four levels: A, B, C, and D. Among them, A means no hardening, mildew, or agglomeration within 2 years; B means no hardening, mildew, or agglomeration within 1.5 years; C means no hardening, mildew, or agglomeration within 1 year; D means no hardening, mildew, or agglomeration within 0.5 years.

[0074] Freezing test: Freeze at -20℃ for 3h, then restore to 22±3℃ and observe whether the washed sand has recovered to its original state. According to the recovery effect from good to bad, the recovery effect is divided into four levels: A, B, C, and D. Among them, A means complete recovery; B means most of the recovery; C means more of the recovery; D means less of the recovery.

[0075] Dry hardness test: Place the washed sand between -20 and 40℃ and observe whether it becomes hard, dry, agglomerated or agglomerated. According to the state from good to bad, the state is divided into four levels: A, B, C, and D. Among them, A means that it does not dry or harden above 15℃, does not agglomerate, and has increased viscosity and agglomeration below 10℃, and can be restored by kneading. The epidermis becomes dry after being placed under ultraviolet light for more than one week, and can be restored by kneading; B means that it becomes slightly dry above 15℃, does not harden, and slightly agglomerates. The agglomeration can be restored by kneading. The viscosity increases below 10℃ and agglomerates, which can be restored by kneading. The epidermis becomes dry after being placed under ultraviolet light for more than one week, and can be restored by kneading; C means that it becomes dry, hard, and agglomerated above 15℃, and the viscosity increases below 10℃ and agglomerates. It cannot be restored by kneading. It becomes dry after being placed under ultraviolet light for more than one week, and cannot be restored by kneading.

[0076] Humidity test: Place the washed sand under 25-60% humidity and observe the state of the washed sand. The state is divided into three levels: A, B, and C from good to bad. Among them, A means no change; B means that the sand particles become loose as the humidity increases; C means that the sand particles become seriously loose as the humidity increases.

[0077] Work integrity test: After shaping, observe whether the surface has cracks, deformation or potholes. According to the state from good to bad, the state is divided into three levels: A, B, and C. Among them, A means no obvious cracks, no obvious deformation, and no obvious potholes; B means there are fewer cracks, slight deformation, and fewer potholes; C means more cracks, heavier deformation, and more potholes.

[0078] Washing performance test: observe whether the product can be restored after washing and whether it fades. The product is divided into three levels: A, B, and C, from good to bad. A means it can be restored and does not fade; B means it can be restored and fades slightly; C means it cannot be restored and fades seriously. The test results are shown in Table 2.

[0079] Table 2 Test results

[0080] Storage stability test Freezing test Dry hardness test Humidity test Completeness of the work Washing performance Example 1 A B A B A A Example 2 A B B A A A Example 3 A B B A A A Example 4 A A B B A A Example 5 A A A A A A Example 6 A A B A A A Example 7 A A A A A A Example 8 A A A A A A Comparative Example 1 C C C C C C Comparative Example 2 C C C B B C Comparative Example 3 C D B C B C Comparative Example 4 B C B B B C

[0081] As can be seen from Table 2, the washed sand of the present application has excellent storage stability and excellent performance. The storage stability of the washed sand reaches Class A, that is, it will not harden, mold or agglomerate within 2 years; the anti-freezing performance reaches Class B or Class A, that is, most or all of the washed sand can be restored to its original state after freezing; the dry hardness performance reaches Class B or Class A as the temperature changes, that is, it can maintain or restore its original state within -20 to 40°C without affecting the use; the humidity test reaches Class B or Class A, that is, the sand particles do not appear or appear slightly loose at 25-60% humidity; the integrity of the work is Class A, that is, there is no obvious cracking, deformation or pits on the surface of the washed sand after shaping; the washing performance is Class A, that is, it can be restored after washing and does not fade. The washed sand of the present application significantly improves its storage performance and performance through the synergistic effect between the raw materials, which can increase its service life and meet market demand.

[0082] Comparative Example 1 and Example 1 are compared. The storage stability of the washed sand prepared in Example 1 is Class A; the freezing test is Class B; the dry hardness test is Class A; the humidity test is Class B; the work integrity is Class A; and the water washing performance is Class A. The storage stability of the washed sand prepared in Comparative Example 1 is Class C; the freezing test is Class C; the dry hardness test is Class C; the humidity test is Class C; the work integrity is Class C; and the water washing performance is Class C. By comparison, it can be seen that the storage stability and use performance of the washed sand prepared without adding polyvinyl acetate glue are both reduced. The polyvinyl acetate glue prepared in this application has excellent waterproofness and water resistance, and can significantly improve the water-based properties of washed sand. Moreover, polyvinyl acetate glue is non-toxic and can be safely used in children's handicraft projects and food contact surface applications. Polyvinyl acetate glue also has excellent flexibility, which makes the washed sand have a thixotropic effect, makes the finished product fluffy, soft and waterproof, and makes the surface of the finished product have no obvious cracking, no obvious deformation, and no obvious pits.

[0083] Comparing Comparative Example 2 with Example 1, the storage stability of the washed sand prepared in Example 1 is Class A; the freezing test is Class B; the dry hardness test is Class A; the humidity test is Class B; the work integrity is Class A; and the water washability is Class A. The storage stability of the washed sand prepared in Comparative Example 2 is Class C; the freezing test is Class C; the dry hardness test is Class C; the humidity test is Class B; the work integrity is Class B; and the water washability is Class C. By comparison, it can be seen that the storage stability and use performance of the washed sand prepared without adding epoxy resin glue are both reduced. Epoxy resin glue has excellent good bonding properties. It can further improve the water washability and use performance of washed sand.

[0084] Comparing Comparative Example 3 with Example 1, the storage stability of the washed sand prepared in Example 1 is Class A; the freezing test is Class B; the dry hardness test is Class A; the humidity test is Class B; the work integrity is Class A; and the water washability is Class A. The storage stability of the washed sand prepared in Comparative Example 3 is Class C; the freezing test is Class D; the dry hardness test is Class B; the humidity test is Class C; the work integrity is Class B; and the water washability is Class C. By comparison, it can be seen that the storage stability and use performance of the washed sand prepared without adding phenyl silicone oil are both reduced. Phenyl silicone oil has excellent heat resistance, cold resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertness and small surface tension, which can further improve the service life of washed sand.

[0085] Comparing Comparative Example 4 with Example 1, the storage stability of the washed sand prepared in Example 1 is Class A; the freezing test is Class B; the dry hardness test is Class A; the humidity test is Class B; the work integrity is Class A; and the water washability is Class A. The storage stability of the washed sand prepared in Comparative Example 4 is Class B; the freezing test is Class C; the dry hardness test is Class B; the humidity test is Class B; the work integrity is Class B; and the water washability is Class C. By comparison, it can be seen that the storage stability and use performance of the washed sand prepared without adding white oil are both reduced. White oil has the characteristic of being insoluble in water. Through multiple processing, a smooth-touch film can be formed on the surface of the washed sand, so that the washed sand has excellent water washability and can make the prepared washed sand have the characteristic of not getting your hands wet.

[0086] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A method for preparing toy washed sand, characterized in that: The following steps are involved: The epoxy resin glue, phenyl silicone oil, quartz sand and hydrophobic fumed silica are kneaded, stirred, cross-linked and pre-mixed to obtain a semi-finished product; comprising: stirring and kneading the epoxy resin glue and quartz sand to obtain a mixture 3; adding the hydrophobic fumed silica to the mixture 3, continuing to stir and knead, and then adding the phenyl silicone oil after 1-1.5 hours, discharging the material, and obtaining a semi-finished product; The semi-finished product, polyvinyl acetate glue and white oil are heated and stirred to obtain the toy washed sand; comprising: adding polyvinyl acetate glue to the semi-finished product, kneading and stirring at 70-100° C. for 1-1.5 hours to obtain a mixture 4; adding white oil to the mixture 4, discharging the mixture, and obtaining the toy washed sand; The toy washed sand comprises the following raw materials in parts by weight: 50-70 parts of quartz sand, 10-15 parts of epoxy resin glue, 10-15 parts of polyvinyl acetate glue, 5-6 parts of white oil, 2-3 parts of hydrophobic fumed silica, and 2-3 parts of phenyl silicone oil; The epoxy resin glue is prepared by polyamide epoxy resin and a curing agent, and the curing agent is a polyamide type curing agent; The polyvinyl acetate glue comprises the following raw materials by weight: 20-30 parts of vinyl acetate, 4-7 parts of dibutyl itaconate, 0.1-0.3 parts of dibenzoyl peroxide, and 15-20 parts of acetyl tributyl citrate; The polyvinyl acetate glue is prepared by the following method: Dehydrating the vinyl acetate monomer under vacuum conditions, the temperature of the vinyl acetate monomer dehydration is 110-120° C., and the dehydration time is 3 hours; adding dibutyl itaconate to the dehydrated vinyl acetate monomer under stirring conditions, stirring for 20-35 minutes, to obtain a mixture 1; adding dibenzoyl peroxide to the mixture 1, stirring at 80-90° C. for 1-3 hours, to obtain a main agent; mixing the main agent with acetyl tributyl citrate, stirring for 1-2 hours, to obtain the polyvinyl acetate glue; Alternatively, the polyvinyl acetate glue can also be prepared by the following scheme: The polyvinyl acetate glue also includes the following raw materials in parts by weight: 8-15 parts of methanol and 2-4 parts of acetic acid; Methanol and vinyl acetate monomers are mixed evenly, dibutyl itaconate and acetic acid are added to obtain mixture 2; dibenzoyl peroxide is added to mixture 2, and stirred at 80-90° C. for 1-3 hours to obtain a main agent with a polymerization degree of 400-450; the main agent is mixed with acetyl tributyl citrate, and stirred for 1-2 hours to obtain the polyvinyl acetate glue.