Tube-packed water-based colored sand product and preparation method thereof

Abstract

The present invention relates to the field of epoxy polymer technology, in particular to the field of IPC C04B26, and more specifically to a tube-packed water-based colored sand product and a preparation method thereof. It comprises component A and component B, wherein component A comprises, by weight, 20-50 parts of a water-based epoxy emulsion, 1-3 parts of calcium carbonate, 0.5-3 parts of a defoamer, 50-70 parts of colored sand, 4-6 parts of an emulsifier, and 1-5 parts of an antioxidant, and component B comprises a curing agent. The water-based epoxy emulsion has a viscosity (25°C) of 9000-40000 mPa.s, a solid content of 55-75%, and an epoxy equivalent weight of 180-280 g / eq, which can improve the impact resistance of the epoxy colored sand while reducing the content of volatile gases.

Description

Technical Field

[0001] The present invention relates to the technical field of epoxy polymers, in particular to the field of IPC C04B26, and more specifically to a tube-packed water-based colored sand product and a preparation method thereof. Background Art

[0002] Epoxy colored sand primarily refers to epoxy colored sand caulking agent, a type of tile grout. It generally consists of two components: Component A is a mixture of epoxy resin and filler, and Component B is a mixture of epoxy curing agent and filler. Epoxy colored sand is mildew-resistant, waterproof, and leak-resistant, while also possessing high strength, abrasion resistance, stain resistance, and strong adhesion. Traditional grouting agents use epoxy resin and epoxy curing agent as binders and contain volatile organic compounds (VOCs) as solvents. These agents have a strong odor and are high in harmful gases such as VOCs, formaldehyde, and benzene, severely impacting the indoor environment and posing a health hazard.

[0003] CN110937846A discloses a two-component water-based epoxy colored sand caulk and its preparation method. The caulk comprises: Component A: 10-20 parts water-based epoxy emulsion, 0-18 parts water, 0.3-0.5 parts organically modified magnesium aluminum silicate compound, 0.1-0.2 parts organically modified polysiloxane defoamer, and 63-64 parts sintered colored sand; and Component B: 8-16 parts cationic water-based epoxy curing agent. This invention features a simple preparation process and readily available raw materials. The resulting two-component water-based epoxy colored sand caulk is not only low in odor and environmentally friendly, but also exhibits strong waterproof and antifouling properties, high hardness, mildew and antibacterial properties, wear resistance, ease of application, and a variety of colors. However, the addition of a large amount of solvent water to the epoxy colored sand in this invention somewhat affects the compatibility between the sintered colored sand and the epoxy emulsion. Summary of the Invention

[0004] The present invention provides a tube-packaged water-based colored sand product and its preparation method. By selecting a specific epoxy emulsion and adjusting the ratio of the components, the resulting water-based colored sand has a strong texture and a matte finish after processing. Due to the use of a specific emulsifier, the amine is not easily volatilized after water absorption, resulting in low odor and excellent environmental protection. The product also has good filling properties, excellent water resistance, and is not prone to flaking, making it suitable for bathroom floor joint decoration.

[0005] To achieve the purpose of the present invention, the first aspect of the present invention provides a tube-packed water-based colored sand product, comprising component A and component B. Component A comprises, by weight, 20-50 parts of a water-based epoxy emulsion, 1-3 parts of calcium carbonate, 0.5-3 parts of a defoaming agent, 50-70 parts of colored sand, 4-6 parts of a water-based emulsifier, and 1-5 parts of an antioxidant; and component B comprises a curing agent.

[0006] The applicant has found that the viscosity of the water-based epoxy emulsion (25°C) is 9000-40000mPa.s, the solid content is 55-75%, and the epoxy equivalent is 180-280g / eq, which can improve the impact resistance of the epoxy colored sand and reduce the content of volatile gas. With the increase of solid content, not only can the crosslinking density in the system be effectively improved, but the epoxy equivalent of 180-280g / eq can further increase the rate of the curing reaction. However, the excessively high solid content makes the viscosity of the water-based epoxy emulsion too large, which affects the dispersion performance of the component colored sand to a certain extent, thereby resulting in uneven distribution of crosslinking points and reducing the impact resistance of the epoxy colored sand. Further research found that when a composite emulsifier is used and the weight ratio of the cationic emulsifier to the non-ionic emulsifier is 1: (0.5-1.5), It can effectively improve the dispersion ability of the system. It may be that there is a difference in the hydrophilic-lipophilic balance values ​​of the two different types of emulsifiers. They are adsorbed on the interface to form a tightly arranged complex with high strength, which can effectively prevent the epoxy emulsion and the colored sand from agglomerating, thereby increasing the stability of the emulsion. Further research found that when the mesh number of calcium carbonate is 200-2000 mesh, the waterproof performance of epoxy colored sand can be further improved, so that epoxy colored sand can be used in the gaps on the floor of residential bathrooms. It may be that the calcium carbonate with a mesh number of 200-2000 mesh fills the gaps between the colored sand with a mesh number of 40-120 mesh, thereby improving the density of the prepared epoxy colored sand. At the same time, the colored sand with a larger particle size can adsorb the calcium carbonate with a smaller particle size, reducing the probability of calcium carbonate agglomeration and improving the dispersion efficiency.

[0007] Preferably, the aqueous epoxy emulsion has a viscosity (25° C.) of 9,000-40,000 mPa.s, a solid content of 55-75%, and an epoxy equivalent of 180-280 g / eq.

[0008] More preferably, the aqueous epoxy emulsion has a viscosity (at 25° C.) of 10,000-30,000 mPa.s, a solid content of 57-72%, and an epoxy equivalent of 200-270 g / eq.

[0009] More preferably, the water-based epoxy emulsion comprises Wanna-Resin ERE 2571 and NPEW-258W60, and the weight ratio of Wanna-Resin ERE 2571 to NPEW-258W60 is 1:(2-5).

[0010] More preferably, the water-based epoxy emulsion comprises Wanna-Resin ERE 2571 and NPEW-258W60, and the weight ratio of Wanna-Resin ERE 2571 to NPEW-258W60 is 1:3.5.

[0011] Preferably, the aqueous epoxy emulsion Wanna-Resin ERE 2571 has a viscosity (25° C.) of 30,000 mPa.s, a solid content of 70%, and an epoxy equivalent of 265 g / eq, and is purchased from Ruicheng Xuanyou New Material Technology (Guangdong) Co., Ltd.

[0012] Preferably, the aqueous epoxy emulsion NPEW-258W60 has a viscosity (25° C.) of 20,000 mPa.s, a solid content of 60%, and an epoxy equivalent weight of 215 g / eq, and is purchased from Shenzhen Longdi Chemical Co., Ltd.

[0013] The mesh size of the calcium carbonate is 200-2000 meshes.

[0014] Preferably, the calcium carbonate has a mesh size of 800 mesh and is purchased from Shijiazhuang Lincheng Mineral Products Trading Co., Ltd.

[0015] The defoaming agent includes at least one of BYK141, BYK1719, BYK371, BYK392, BYK355, BYK9565, and BYK1679.

[0016] Preferably, the defoaming agent includes BYK141, a brand of BYK Chemical, purchased from Meixinqi Trading Company, Chancheng District, Foshan City.

[0017] The antioxidant is one or both of antioxidant 1076 and antioxidant 1010.

[0018] Preferably, the antioxidant is antioxidant 1010 (CAS: 6683-19-8).

[0019] Preferably, the emulsifier includes a cationic emulsifier and a nonionic emulsifier, and the weight ratio of the cationic emulsifier to the nonionic emulsifier is 1:(0.5-1.5).

[0020] Further preferably, the emulsifier includes a cationic emulsifier and a nonionic emulsifier, and the weight ratio of the cationic emulsifier to the nonionic emulsifier is 1:0.8.

[0021] Preferably, the cationic emulsifier includes at least one of dodecyltrimethylammonium bromide, hexadecyltrimethylammonium bromide, hexadecyltrimethylammonium chloride, and octadecyltrimethylammonium chloride.

[0022] More preferably, the cationic emulsifier includes dodecyltrimethylammonium bromide (CAS: 1119-94-4).

[0023] Preferably, the nonionic emulsifier includes at least one of stearic acid polyoxyethylene ether, fatty acid polyoxyethylene ether, and fatty alcohol polyoxyethylene ether.

[0024] More preferably, the nonionic emulsifier includes polyoxyethylene stearate (CAS: 9004-99-3).

[0025] The curing agent includes one or a combination of polyamine-epoxy polymerization emulsion, dicyandiamide emulsion, fatty amine emulsion, etc.

[0026] Preferably, the curing agent comprises a fatty amine emulsion, the viscosity of the fatty amine emulsion is 200-500 mPa·s, and the amine value is 200-300 mg KOH / g.

[0027] Further preferably, the curing agent includes a fatty amine emulsion, the viscosity of the fatty amine emulsion is 375 mPa.s, the amine value is 260 mg KOH / g, purchased from Guangzhou Jiuying Chemical Materials Co., Ltd., brand: German Evonik Ancamine 2771.

[0028] Preferably, the weight ratio of the aqueous epoxy emulsion to the emulsifier is 1:(0.1-0.2).

[0029] Further preferably, the weight ratio of the aqueous epoxy emulsion to the emulsifier is 1:0.1.

[0030] Preferably, the mesh size of the colored sand is 40-120 meshes.

[0031] Further preferably, the colored sand has a mesh size of 100 and is purchased from Lingshou County Demao Mineral Products Processing Co., Ltd.

[0032] A second aspect of the present invention provides a method for preparing a tube-packed water-based colored sand product, comprising the following steps:

[0033] S1, adding calcium carbonate, defoamer, emulsifier, antioxidant, and colored sand to the water-based epoxy emulsion in sequence, stirring and mixing uniformly to obtain component A;

[0034] S2, add component B to component A and mix well.

[0035] Preferably, the weight ratio of component A to component B is (7-13):1.

[0036] Further preferably, the weight ratio of component A to component B is 9:1.

[0037] Beneficial effects:

[0038] 1. When the viscosity of water-based epoxy emulsion (25°C) is 9000-40000mPa.s, the solid content is 55-75%, and the epoxy equivalent weight is 180-280g / eq, the impact resistance of epoxy colored sand can be improved while reducing the content of volatile gas.

[0039] 2. Use a composite emulsifier with a weight ratio of cationic emulsifier to nonionic emulsifier of 1: (0.5-1.5)

[0040] When the amount of water is added, the dispersion ability of the system can be effectively improved.

[0041] 3. When the mesh size of calcium carbonate is 200-2000 mesh, the waterproof performance of epoxy colored sand can be further improved, so that epoxy colored sand can be used in the gaps of the bathroom floor of residential buildings. DETAILED DESCRIPTION

[0042] Example 1

[0043] A tube-packed water-based colored sand product comprises component A and component B. Component A comprises, by weight, 40 parts of water-based epoxy emulsion, 1 part of calcium carbonate, 1 part of defoaming agent, 60 parts of colored sand, 4 parts of water-based emulsifier, and 1 part of antioxidant; and component B comprises a curing agent.

[0044] The water-based epoxy emulsion includes Wanna-Resin ERE 2571 and NPEW-258W60, and the weight ratio of Wanna-Resin ERE 2571 to NPEW-258W60 is 1:3.5.

[0045] The water-based epoxy emulsion Wanna-Resin ERE 2571 has a viscosity (25° C.) of 30,000 mPa.s, a solid content of 70%, and an epoxy equivalent weight of 265 g / eq, and is purchased from Ruicheng Xuanyou New Material Technology (Guangdong) Co., Ltd.

[0046] The aqueous epoxy emulsion NPEW-258W60 has a viscosity (25° C.) of 20,000 mPa·s, a solid content of 60%, and an epoxy equivalent weight of 215 g / eq, and is purchased from Shenzhen Longdi Chemical Co., Ltd.

[0047] The calcium carbonate mesh size is 800 mesh and was purchased from Shijiazhuang Lincheng Mineral Products Trading Co., Ltd.

[0048] The defoaming agent includes BYK141, a brand of BYK Chemical, purchased from Meixinqi Trading Company in Chancheng District, Foshan City.

[0049] The antioxidant is antioxidant 1010 (CAS: 6683-19-8).

[0050] The emulsifier includes a cationic emulsifier and a nonionic emulsifier, and the weight ratio of the cationic emulsifier to the nonionic emulsifier is 1:0.8.

[0051] The cationic emulsifier includes dodecyltrimethylammonium bromide (CAS: 1119-94-4).

[0052] The nonionic emulsifier includes polyoxyethylene stearate (CAS: 9004-99-3).

[0053] The curing agent includes a fatty amine emulsion with a viscosity of 375 mPa.s and an amine value of 260 mgKOH / g, purchased from Guangzhou Jiuying Chemical Materials Co., Ltd., brand: German Evonik Ancamine 2771.

[0054] The colored sand has a mesh number of 100 and is purchased from Lingshou County Demao Mineral Products Processing Co., Ltd.

[0055] A method for preparing a tube-packed water-based colored sand product comprises the following steps:

[0056] S1, adding calcium carbonate, defoamer, emulsifier, antioxidant, and colored sand to the water-based epoxy emulsion in sequence, stirring at 800 rpm for 30 minutes to mix evenly, to obtain component A;

[0057] S2. Add component B to component A and stir at 200 rpm for 5 minutes to mix evenly.

[0058] The weight ratio of component A to component B is 9:1.

[0059] Example 2

[0060] The specific implementation is the same as that of Example 1; the difference is that the water-based epoxy emulsion in Example 2 includes Wanna-Resin ERE 2571 and NPEW-258W60, and the weight ratio of Wanna-Resin ERE 2571 to NPEW-258W60 is 1:4.

[0061] Example 3

[0062] The specific implementation is the same as that of Example 1; the difference is that the emulsifier in Example 3 includes a cationic emulsifier and a nonionic emulsifier, and the weight ratio of the cationic emulsifier to the nonionic emulsifier is 1:1.2.

[0063] Comparative Example 1

[0064] Specific implementation method is the same as Example 1; except that, the viscosity (25 ° C) of the aqueous epoxy emulsion in Comparative Example 1 is 5000mPa.s, the solid content is 39%, purchased from Zhuang Hong Chemical Technology (Shanghai) Co., Ltd., model: H-502-42W

[0065] Comparative Example 2

[0066] The specific implementation is the same as Example 1; the difference is that the emulsifier in Comparative Example 2 includes a cationic emulsifier and a nonionic emulsifier, and the weight ratio of the cationic emulsifier to the nonionic emulsifier is 3:1.

[0067] Comparative Example 3

[0068] The specific implementation is the same as Example 1; the difference is that the weight ratio of component A to component B in Comparative Example 3 is 15:1.

[0069] Performance testing methods

[0070] The performance of the colored sand obtained in Examples 1-3 and Comparative Examples 1-3 was tested, and the test data are listed in Table 1.

[0071] Water resistance: Refer to GB / T1733-1993 test, and observe the surface after 72 hours to see if there are bubbles, peeling, whitening, etc.

[0072] Impact resistance (kg / cm2): Tested in accordance with GB / T1732-2020.

[0073] Total volatile organic compounds (g / L): Tested in accordance with GB18583-2008.

[0074] Performance test data

[0075] Table 1

[0076]

Claims

1. A tube-packed water-based colored sand product, characterized in that: The invention is composed of component A and component B. Component A is composed of the following raw materials by weight: 20-50 parts of water-based epoxy emulsion, 1-3 parts of calcium carbonate, 0.5-3 parts of defoaming agent, 50-70 parts of colored sand, 4-6 parts of emulsifier, 1-5 parts of antioxidant, and component B is a curing agent. The aqueous epoxy emulsion has a viscosity of 9000-40000 mPa.s, a solid content of 55-75%, and an epoxy equivalent weight of 180-280 g / eq; The emulsifier includes a cationic emulsifier and a nonionic emulsifier, and the weight ratio of the cationic emulsifier to the nonionic emulsifier is 1: (0.5-1.5); The weight ratio of the aqueous epoxy emulsion to the emulsifier is 1:(0.1-0.2); the weight ratio of component A to component B is (7-13):

1.

2. A tube-packed water-based colored sand product according to claim 1, characterized in that: The aqueous epoxy emulsion has a viscosity of 10,000-30,000 mPa.s, a solid content of 57-72%, and an epoxy equivalent of 200-270 g / eq.

3. A tube-packed water-based colored sand product according to claim 2, characterized in that: The curing agent includes one or a combination of polyamine-epoxy polymerization emulsion, dicyandiamide emulsion, and fatty amine emulsion.

4. A tube-packed water-based colored sand product according to claim 3, characterized in that: The curing agent includes a fatty amine emulsion, the viscosity of the fatty amine emulsion is 200-500 mPa.s, and the amine value is 200-300 mg KOH / g.

5. The tube-packed water-based colored sand product according to claim 1, characterized in that: The mesh number of the colored sand is 40-120 meshes.

6. A method for preparing the tube-packed water-based colored sand product according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, adding calcium carbonate, defoamer, emulsifier, antioxidant, and colored sand to the water-based epoxy emulsion in sequence, stirring and mixing uniformly to obtain component A; S2, add component B to component A and mix well.

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