Color-adjustable and yellowing-resistant colored sand sealant and preparation method thereof

Abstract

The invention relates to a color-adjustable yellowing-resistant colored sand sealant which comprises a component A and a component B. The component A comprises the following components in parts by weight: 15-25 parts of modified hydrogenated epoxy resin, 1-3 parts of an epoxy reactive diluent, 70-80 parts of glass beads, 1-2 parts of hydrophobic fumed silica, 0.2-0.5 part of a defoaming agent and 1-2 parts of a silane coupling agent. And the component B comprises the following components in parts by weight: 85-95 parts of an epoxy curing agent, 2-5 parts of precipitated fumed silica, 2-5 parts of hydrophilic fumed silica and 2.5-5 parts of a functional aid. The basically colorless modified hydrogenated epoxy resin is adopted in the component A, so that the batch-to-batch color stability of the component A can be well controlled; meanwhile, the precipitation-method fumed silica in the component B can effectively slow down the problem of high-temperature discoloration of the epoxy curing agent so as to ensure the color stability of the component B in the storage process, and can effectively slow down the problem of yellowing of an epoxy curing system in cooperation with the functional additive, so that the component A and the component B can realize one-time color matching success through a color matching instrument after being mixed.

Description

Technical Field

[0001] The invention relates to the technical field of seam beautifying agents, and in particular to a color-adjustable, yellowing-resistant colored sand seam beautifying agent and a preparation method thereof. Background Art

[0002] With people's continuous pursuit of a better home life, caulking agent has become one of the indispensable decorative materials in the home furnishing market. The market demand for caulking agent is not limited to conventional ordinary colors. At present, the market already has polyurea colored sand one brick one color coloring, barreled colored sand one brick one color coloring, and hydrogenated colored sand caulking agent one brick one color coloring, but these coloring work requires professional masters to do it, and professional masters need to make fine adjustments after each coloring, and it is impossible to successfully colorize in one go through a color mixing instrument. The color mixing difference of the color mixing instrument is mainly attributed to two points: first, the glass beads used in the above-mentioned colored sand system have color differences between batches; second, the curing agent has some discoloration and oxidation yellowing problems after long-term storage.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a color-adjustable and yellowing-resistant colored sand seam beautifying agent and a preparation method thereof.

[0005] The technical solution adopted by the present invention is:

[0006] On one hand, the present invention provides a color-adjustable and yellowing-resistant colored sand seam beautifying agent, comprising component A and component B, wherein component A comprises, by weight: 15-25 parts of modified hydrogenated epoxy resin, 1-3 parts of epoxy reactive diluent, 70-80 parts of glass microspheres, 1-2 parts of hydrophobic fumed silica, 0.2-0.5 parts of defoaming agent, and 1-2 parts of silane coupling agent;

[0007] The B component comprises, by weight: 85-95 parts of epoxy curing agent, 2-5 parts of precipitated fumed silica, 2-5 parts of hydrophilic fumed silica, and 2.5-5 parts of functional additives.

[0008] The invention provides a color-adjustable and yellowing-resistant colored sand seam beautifying agent. By adopting a substantially colorless modified hydrogenated epoxy resin in component A, the color stability of component A between batches can be well controlled. Meanwhile, the precipitated fumed silica in component B can effectively mitigate the high-temperature discoloration problem of the epoxy curing agent, so as to ensure the color stability of component B during storage. The yellowing problem of the epoxy curing system can be effectively mitigated by the functional additive, so that components A and B can be successfully color-adjusted once by a colorimeter after being mixed. The product has small batch color difference, good color stability during long-term storage and good yellowing resistance.

[0009] Preferably, the modified hydrogenated epoxy resin comprises, by weight: 83-88 parts of hydrogenated epoxy resin, 10-17 parts of polyether unit amine, and 1-2 parts of catalyst.

[0010] More preferably, the catalyst is tin tetrachloride or boron trifluoride.

[0011] More preferably, the modified hydrogenated epoxy resin is prepared by the following method: under nitrogen protection, the hydrogenated epoxy resin and the catalyst are sequentially added into a container, the temperature is raised to 50-55° C., and then the polyether unit amine is added dropwise within 1-1.5 hours, the temperature is adjusted to 70-80° C., and the reaction is carried out for 3-4 hours to obtain the modified hydrogenated epoxy resin.

[0012] Preferably, the epoxy reactive diluent is one or more of C12-14 alcohol glycidyl ether, 1,6-hexanediol diglycidyl ether, and decyl glycidyl ether.

[0013] Preferably, the glass microspheres are produced by chemical synthesis.

[0014] Preferably, the functional additives include, by weight: 0.5-1 part of antioxidant BHT, 1-2 parts of thickener, 0.5-1 part of defoamer, and 0.5-1 part of ultraviolet absorber.

[0015] Preferably, the weight ratio of the component A to the component B is 10:1.

[0016] Another aspect of the present invention provides a method for preparing a color-adjustable and yellowing-resistant colored sand seam-beautifying agent, comprising the following steps:

[0017] S1. Mix the modified hydrogenated epoxy resin, epoxy active diluent, defoamer and silane coupling agent and stir for 10-20 minutes, then add glass microspheres and hydrophobic fumed silica, stir for 1-2 hours, control the temperature not exceeding 60° C., and evacuate for 30 minutes to obtain component A;

[0018] S2, disperse and stir the epoxy curing agent and the functional additive for 10-20 minutes, then add the precipitated fumed silica and the hydrophilic fumed silica, disperse and stir for 1-2 hours, control the temperature not to exceed 60°C, and evacuate for 30 minutes to obtain component B;

[0019] S3. When using, the component A and the component B are mixed according to the proportion. DETAILED DESCRIPTION

[0021] An embodiment of the present invention provides a color-adjustable and yellowing-resistant colored sand seam beautifying agent, comprising component A and component B, wherein component A comprises, by weight: 15-25 parts of modified hydrogenated epoxy resin, 1-3 parts of epoxy reactive diluent, 70-80 parts of glass microspheres, 1-2 parts of hydrophobic fumed silica, 0.2-0.5 parts of defoaming agent, and 1-2 parts of silane coupling agent;

[0022] Component B includes, by weight: 85-95 parts of epoxy curing agent, 2-5 parts of precipitated fumed silica, 2-5 parts of hydrophilic fumed silica, and 2.5-5 parts of functional additives.

[0023] In a preferred embodiment of the present invention, the modified hydrogenated epoxy resin comprises, by weight: 83-88 parts of hydrogenated epoxy resin, 10-17 parts of polyether unit amine, and 1-2 parts of catalyst.

[0024] In a more preferred embodiment of the present invention, the catalyst is tin tetrachloride or boron trifluoride.

[0025] In the present invention, by introducing a specific catalyst in the modification process of the hydrogenated epoxy resin, a more colorless and transparent modified hydrogenated epoxy resin can be obtained at a lower reaction temperature, so that the color difference between product batches is small and the color stability is good. In addition, the modified hydrogenated epoxy resin has improved yellowing resistance compared to conventional epoxy resins, and is also water-emulsifiable, so it can be scrubbed with water during construction.

[0026] In a more preferred embodiment of the present invention, the modified hydrogenated epoxy resin is prepared by the following method: under nitrogen protection, hydrogenated epoxy resin and catalyst are added in sequence into a container, the temperature is raised to 50-55° C., and then the polyether unit amine is added dropwise within 1-1.5 hours, the temperature is adjusted to 70-80° C., and the reaction is carried out for 3-4 hours to obtain the modified hydrogenated epoxy resin.

[0027] In a preferred embodiment of the present invention, the epoxy reactive diluent is one or more of C12-14 alcohol glycidyl ether, 1,6-hexanediol diglycidyl ether, and decyl glycidyl ether.

[0028] In a preferred embodiment of the present invention, the glass microspheres are prepared by chemical synthesis. In the present invention, the glass microspheres prepared by a specific synthesis method are selected to improve the color stability of component A between batches and reduce color difference.

[0029] In a preferred embodiment of the present invention, the functional additives include, by weight: 0.5-1 part of antioxidant BHT, 1-2 parts of thickener, 0.5-1 part of defoamer, and 0.5-1 part of ultraviolet absorber. In the present invention, the antioxidant BHT compounded with ultraviolet absorber in the functional additive of component B is beneficial to improve the yellowing problem of epoxy curing system.

[0030] In a preferred embodiment of the present invention, the weight ratio of component A to component B is 10:1.

[0031] Another aspect of the present invention provides a method for preparing a color-adjustable and yellowing-resistant colored sand seam-beautifying agent, comprising the following steps:

[0032] S1. Mix the modified hydrogenated epoxy resin, epoxy active diluent, defoamer and silane coupling agent and stir for 10-20 minutes, then add glass microspheres and hydrophobic fumed silica, stir for 1-2 hours, control the temperature not exceeding 60° C., and evacuate for 30 minutes to obtain component A;

[0033] S2, disperse and stir the epoxy curing agent and the functional additive for 10-20 minutes, then add the precipitated fumed silica and the hydrophilic fumed silica, disperse and stir for 1-2 hours, control the temperature not to exceed 60°C, and evacuate for 30 minutes to obtain component B;

[0034] S3. When using, mix component A and component B according to the ratio.

[0035] The sources of some raw materials in the following examples are as follows:

[0036] The hydrogenated epoxy resin used is XY518 from Anhui Anyuan;

[0037] The polyether unit amine is selected from Huntsman's M1000 and / or Zibo Zhengda's ZM1207;

[0038] Glass beads can be any one of MC50, MC80, CM6030, and HL40 produced by Zhengzhou Shenglai Technology;

[0039] The hydrophobic fumed silica is selected from at least one of Cabot's TS720, Wacker's H18, and Evonik Degussa's R972;

[0040] The defoamer is BYK-A530 or TEGO900;

[0041] The epoxy curing agent is 2003B-29 from Guangzhou Liantuo;

[0042] The precipitated fumed silica uses J613 or J688 from Jiangmen Zhanpeng Chemical;

[0043] The hydrophilic fumed silica is selected from at least one of Cabot's M5, Wacker's N20, and Huifu's HL200;

[0044] The thickener is 1079 from Baianxing;

[0045] The ultraviolet absorber used is Kaiyue's 9522.

[0046] Example 1

[0047] A color-adjustable and yellowing-resistant colored sand seam beautifying agent comprises a component A and a component B in a weight ratio of 10:1, wherein the component A comprises, by weight: 20.3 parts of a modified hydrogenated epoxy resin, 1.5 parts of an epoxy reactive diluent (C12-14 alcohol glycidyl ether), 75 parts of glass microbeads, 1.5 parts of hydrophobic fumed silica, 0.2 parts of a defoaming agent, and 1.5 parts of a silane coupling agent (KH560).

[0048] The modified hydrogenated epoxy resin includes, by weight: 87 parts of hydrogenated epoxy resin, 12 parts of polyether unit amine, and 1 part of catalyst (tin tetrachloride).

[0049] The modified hydrogenated epoxy resin is prepared by the following method: under nitrogen protection, hydrogenated epoxy resin and catalyst are added to a container in sequence, the temperature is raised to 50° C., and then the polyether unit amine is added dropwise within 1-1.5 hours, the temperature is adjusted to 70° C., and the reaction is carried out for 3.5 hours to obtain the modified hydrogenated epoxy resin.

[0050] Glass microspheres are made by chemical synthesis.

[0051] Component B includes, by weight: 90 parts of epoxy curing agent, 3 parts of precipitated fumed silica, 4 parts of hydrophilic fumed silica, and 3 parts of functional additives.

[0052] The functional additives include, by weight: 0.5 parts of antioxidant BHT, 1.5 parts of thickener, 0.5 parts of defoamer, and 0.5 parts of ultraviolet absorber.

[0053] It is prepared by the following method, comprising the following steps:

[0054] S1. Mix the modified hydrogenated epoxy resin, epoxy reactive diluent, defoamer and silane coupling agent and stir for 10 minutes, then add glass microspheres and hydrophobic fumed silica, stir for 1 hour, control the temperature not exceeding 60° C., and evacuate for 30 minutes to obtain component A;

[0055] S2, disperse and stir the epoxy curing agent and the functional additive for 10 minutes, then add the precipitated fumed silica and the hydrophilic fumed silica, disperse and stir for 1 hour, control the temperature not exceeding 60° C., and evacuate for 30 minutes to obtain component B;

[0056] S3. When using, mix component A and component B according to the ratio.

[0057] In this embodiment, the polyether unit amine is selected from Huntsman's M1000; the glass microspheres are selected from Zhengzhou Saint-Light's MC80; the hydrophobic fumed silica is selected from Cabot's TS720; the defoaming agent (component A) is selected from TEGO900; the precipitated fumed silica is selected from Jiangmen Zhanpeng Chemical's J613; the hydrophilic fumed silica is selected from Cabot's M5; the defoaming agent (component B) is selected from BYK-A530; the sources of hydrogenated epoxy resin, epoxy curing agent, thickener and ultraviolet absorber are selected as described above.

[0058] Example 2

[0059] A color-adjustable and yellowing-resistant colored sand seam beautifying agent comprises a component A and a component B in a weight ratio of 10:1, wherein the component A comprises, by weight: 19.3 parts of modified hydrogenated epoxy resin, 2.5 parts of epoxy reactive diluent (1,6-hexanediol diglycidyl ether), 75 parts of glass microbeads, 1.8 parts of hydrophobic fumed silica, 0.2 parts of a defoaming agent, and 1.2 parts of a silane coupling agent (KH560).

[0060] The modified hydrogenated epoxy resin includes, by weight: 86 parts of hydrogenated epoxy resin, 13 parts of polyether unit amine, and 1 part of catalyst (boron trifluoride).

[0061] The preparation method of the modified hydrogenated epoxy resin is the same as that of Example 1.

[0062] Glass microspheres are made by chemical synthesis.

[0063] Component B includes, by weight: 90 parts of epoxy curing agent, 3.5 parts of precipitated fumed silica, 3.5 parts of hydrophilic fumed silica, and 3 parts of functional additives.

[0064] The functional additives include, by weight: 0.5 parts of antioxidant BHT, 1.5 parts of thickener, 0.5 parts of defoamer, and 0.5 parts of ultraviolet absorber.

[0065] The preparation method of the color-adjustable and yellowing-resistant colored sand seam beautifying agent is the same as that of Example 1.

[0066] In this embodiment, the polyether unit amine is selected from Huntsman's M1000; the glass microspheres are selected from Zhengzhou Saint-Light's MC80; the hydrophobic fumed silica is selected from Wacker's H18; the defoaming agent (component A / component B) is selected from BYK-A530; the precipitated fumed silica is selected from Jiangmen Zhanpeng Chemical's J613; the hydrophilic fumed silica is selected from Wacker N20; the sources of the hydrogenated epoxy resin, epoxy curing agent, thickener and ultraviolet absorber are selected as described above.

[0067] Example 3

[0068] A color-adjustable and yellowing-resistant colored sand seam beautifying agent comprises a component A and a component B in a weight ratio of 10:1, wherein the component A comprises, by weight: 19.8 parts of modified hydrogenated epoxy resin, 2 parts of epoxy reactive diluent (decyl glycidyl ether), 74.5 parts of glass microbeads, 1.5 parts of hydrophobic fumed silica, 0.2 parts of a defoaming agent, and 2 parts of a silane coupling agent (KH560).

[0069] The modified hydrogenated epoxy resin includes, by weight: 87 parts of hydrogenated epoxy resin, 12 parts of polyether unit amine, and 1 part of catalyst (tin tetrachloride).

[0070] The preparation method of the modified hydrogenated epoxy resin is the same as that of Example 1.

[0071] Glass microspheres are made by chemical synthesis.

[0072] Component B includes, by weight: 90 parts of epoxy curing agent, 4 parts of precipitated fumed silica, 3 parts of hydrophilic fumed silica, and 3 parts of functional additive.

[0073] The functional additives include, by weight: 0.5 parts of antioxidant BHT, 1.5 parts of thickener, 0.5 parts of defoamer, and 0.5 parts of ultraviolet absorber.

[0074] The preparation method of the color-adjustable and yellowing-resistant colored sand seam beautifying agent is the same as that of Example 1.

[0075] In this embodiment, the polyether unit amine is ZM1207 from Zibo Zhengda; the glass microspheres are MC80 from Zhengzhou Saint-Light; the hydrophobic fumed silica is Cabot TS720; the defoaming agent (component A / component B) is BYK-A530; the precipitated fumed silica is J688 from Jiangmen Zhanpeng Chemical; the hydrophilic fumed silica is Wacker N20; the sources of the hydrogenated epoxy resin, epoxy curing agent, thickener and ultraviolet absorber are selected as described above.

[0076] Example 4

[0077] A color-adjustable and yellowing-resistant colored sand seam beautifying agent comprises a component A and a component B in a weight ratio of 10:1, wherein the component A comprises, by weight: 18 parts of a modified hydrogenated epoxy resin, 2.5 parts of an epoxy reactive diluent (a mixture of C12-14 alcohol glycidyl ether and 1,6-hexanediamine diglycidyl ether in a weight ratio of 1:1), 75.8 parts of glass microbeads, 1.5 parts of hydrophobic fumed silica, 0.2 parts of a defoaming agent, and 2 parts of a silane coupling agent (KH560).

[0078] The modified hydrogenated epoxy resin includes, by weight: 87 parts of hydrogenated epoxy resin, 12 parts of polyether unit amine, and 1 part of catalyst (boron trifluoride).

[0079] The preparation method of the modified hydrogenated epoxy resin is the same as that of Example 1.

[0080] Glass microspheres are made by chemical synthesis.

[0081] Component B includes, by weight: 89 parts of epoxy curing agent, 4 parts of precipitated fumed silica, 4 parts of hydrophilic fumed silica, and 3 parts of functional additives.

[0082] The functional additives include, by weight: 0.5 parts of antioxidant BHT, 1.5 parts of thickener, 0.5 parts of defoamer, and 0.5 parts of ultraviolet absorber.

[0083] The preparation method of the color-adjustable and yellowing-resistant colored sand seam beautifying agent is the same as that of Example 1.

[0084] In this embodiment, the polyether unit amine is ZM1207 from Zibo Zhengda; the glass microspheres are MC80 from Zhengzhou Saint-Light; the hydrophobic fumed silica is Cabot TS720; the defoaming agent (component A / component B) is TEGO900; the precipitated fumed silica is J688 from Jiangmen Zhanpeng Chemical; the hydrophilic fumed silica is Wacker N20; the sources of the hydrogenated epoxy resin, epoxy curing agent, thickener and ultraviolet absorber are selected as described above.

[0085] Example 5

[0086] A color-adjustable and yellowing-resistant colored sand seam beautifying agent comprises a component A and a component B in a weight ratio of 10:1, wherein the component A comprises, by weight: 19.8 parts of modified hydrogenated epoxy resin, 2 parts of epoxy reactive diluent (1,6-hexanediamine diglycidyl ether), 74.5 parts of glass microbeads, 1.5 parts of hydrophobic fumed silica, 0.2 parts of a defoaming agent, and 2 parts of a silane coupling agent (KH560).

[0087] The modified hydrogenated epoxy resin includes, by weight: 88 parts of hydrogenated epoxy resin, 10.5 parts of polyether unit amine, and 1.5 parts of catalyst (tin tetrachloride).

[0088] The preparation method of the modified hydrogenated epoxy resin is the same as that of Example 1.

[0089] Glass microspheres are made by chemical synthesis.

[0090] Component B includes, by weight: 90 parts of epoxy curing agent, 4 parts of precipitated fumed silica, 3 parts of hydrophilic fumed silica, and 3 parts of functional additive.

[0091] The functional additives include, by weight: 0.5 parts of antioxidant BHT, 1.5 parts of thickener, 0.5 parts of defoamer, and 0.5 parts of ultraviolet absorber.

[0092] The preparation method of the color-adjustable and yellowing-resistant colored sand seam beautifying agent is the same as that of Example 1.

[0093] In this embodiment, the polyether unit amine is ZM1207 from Zibo Zhengda; the glass microspheres are MC80 from Zhengzhou Saint-Light; the hydrophobic fumed silica is Cabot TS720; the defoaming agent (component A) is TEGO900; the precipitated fumed silica is J688 from Jiangmen Zhanpeng Chemical; the hydrophilic fumed silica is Wacker N20; the defoaming agent (component B) is BYK-A530; the sources of hydrogenated epoxy resin, epoxy curing agent, thickener and ultraviolet absorber are selected as described above.

[0094] Comparative Example 1

[0095] A colored sand seam beautifying agent comprises a component A and a component B in a weight ratio of 10:1, wherein the component A comprises, by weight: 20.3 parts of a modified epoxy resin, 1.5 parts of an epoxy reactive diluent (C12-14 alcohol glycidyl ether), 75 parts of glass microbeads, 1.5 parts of hydrophobic fumed silica, 0.2 parts of a defoaming agent, and 1.5 parts of a silane coupling agent (KH560).

[0096] The modified hydrogenated epoxy resin includes, by weight: 88 parts of epoxy resin E-51 and 12 parts of polyether unit amine.

[0097] The modified epoxy resin is prepared by the following method: under nitrogen protection, epoxy resin E-51 is added into a container, the temperature is raised to 70°C, and then the polyether unit amine is added dropwise within 1-1.5 hours, the temperature is adjusted to 100°C, and the reaction is carried out for 3.5 hours to obtain the modified epoxy resin.

[0098] Glass beads are solid glass beads produced by forging using conventional methods.

[0099] Component B includes, by weight: 94 parts of epoxy curing agent, 4 parts of hydrophilic fumed silica, and 2 parts of functional additives.

[0100] The functional additives include, by weight: 1.5 parts of thickener and 0.5 parts of defoamer.

[0101] It is prepared by the following method, comprising the following steps:

[0102] S1. Mix the modified epoxy resin, epoxy reactive diluent, defoamer and silane coupling agent and stir for 10 minutes, then add glass microspheres and hydrophobic fumed silica, stir for 1 hour, control the temperature not exceeding 60° C., and evacuate for 30 minutes to obtain component A;

[0103] S2, disperse and stir the epoxy curing agent and the functional additive for 10 minutes, then add the hydrophilic fumed silica, disperse and stir for 1 hour, control the temperature not exceeding 60° C., and evacuate for 30 minutes to obtain component B;

[0104] S3. When using, mix component A and component B according to the ratio.

[0105] In this comparative example, the polyether unit amine is selected from Huntsman's M1000; the hydrophobic fumed silica is selected from Cabot's TS720; the defoamer (component A) is selected from TEGO900; the hydrophilic fumed silica is selected from Cabot's M5; the defoamer (component B) is selected from BYK-A530; the sources of the epoxy curing agent and the thickener are selected as described above.

[0106] Comparative Example 2

[0107] The difference between this comparative example and Example 1 is that no catalyst is added to the modified hydrogenated epoxy resin, and an equal amount of hydrogenated epoxy resin is used instead, that is, the modified hydrogenated epoxy resin includes 88 parts of hydrogenated epoxy resin and 12 parts of polyether unit amine in parts by weight. The remaining steps are the same as in Example 1.

[0108] The performance of the seam beautifying agents prepared in Examples 1-5 and Comparative Examples 1-2 was tested, and the results are recorded in Table 1.

[0109] The test method is as follows:

[0110] Appearance: Visual observation;

[0111] Color difference: tested according to 4.2 of GB / T 1766-2008;

[0112] Thermal storage color stability: thermal storage at 80℃ for 48h, observe the color change;

[0113] Flexural strength: tested according to JC / T 1004-2017;

[0114] Compressive strength: tested according to JC / T 1004-2017;

[0115] Odor level: tested according to GB / T 36797-2018;

[0116] VOC content: tested according to GB 33372-2020;

[0117] Yellowing resistance: tested according to GB / T 36797-2018.

[0118] Table 1

[0119]

[0120]

[0121] As can be seen from Table 1, the color difference between batches of the color-adjustable and yellowing-resistant colored sand caulking agent prepared in Examples 1-5 of the present invention is small, the color of the B component is basically unchanged after heat storage, the overall mechanical strength is high, the odor is low and the yellowing resistance is good, it is suitable for color adjustment by color adjustment instruments, simple and efficient. Relative to Example 1, the modified epoxy resin of Comparative Example 1 uses conventional epoxy resin, and is modified without adding a catalyst, and is compounded with solid glass microbeads produced by conventional forging methods, which significantly increases the color difference between batches of the A component; and the B component of Comparative Example 1 lacks precipitated fumed silica, antioxidants and ultraviolet absorbers, and the heat storage color stability of the B component is significantly reduced, and yellowing is obvious. Finally, the yellowing resistance of the product obtained by mixing the A and B components is significantly reduced. Compared with Example 1, in Comparative Example 2, since no catalyst is added to modify the hydrogenated epoxy resin, the color difference between batches of component A is increased; and the lack of catalyst will also affect the modification degree of the hydrogenated epoxy resin, resulting in a worse overall curing effect of the epoxy system, so the mechanical properties and yellowing resistance of the final product are both deteriorated.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A color-adjustable and yellowing-resistant colored sand seam-beautifying agent, characterized in that: The invention comprises component A and component B, wherein component A comprises, by weight: 15-25 parts of modified hydrogenated epoxy resin, 1-3 parts of epoxy reactive diluent, 70-80 parts of glass microspheres, 1-2 parts of hydrophobic fumed silica, 0.2-0.5 parts of defoaming agent, and 1-2 parts of silane coupling agent; The B component comprises, by weight: 85-95 parts of epoxy curing agent, 2-5 parts of precipitated fumed silica, 2-5 parts of hydrophilic fumed silica, and 2.5-5 parts of functional additives.

2. The color-adjustable and yellowing-resistant colored sand seam-beautifying agent according to claim 1, characterized in that: The modified hydrogenated epoxy resin comprises, by weight: 83-88 parts of hydrogenated epoxy resin, 10-17 parts of polyether unit amine, and 1-2 parts of catalyst.

3. The color-adjustable and yellowing-resistant colored sand seam-beautifying agent according to claim 2, characterized in that: The catalyst is tin tetrachloride or boron trifluoride.

4. The color-adjustable and yellowing-resistant colored sand seam-beautifying agent according to claim 2, characterized in that: The modified hydrogenated epoxy resin is prepared by the following method: under nitrogen protection, the hydrogenated epoxy resin and the catalyst are sequentially added into a container, the temperature is raised to 50-55° C., and then the polyether unit amine is added dropwise within 1-1.5 hours, the temperature is adjusted to 70-80° C., and the reaction is carried out for 3-4 hours to obtain the modified hydrogenated epoxy resin.

5. The color-adjustable and yellowing-resistant colored sand seam-beautifying agent according to claim 1, characterized in that: The epoxy reactive diluent is one or more of C12-14 alcohol glycidyl ether, 1,6-hexanediol diglycidyl ether, and decyl glycidyl ether.

6. The color-adjustable and yellowing-resistant colored sand seam-beautifying agent according to claim 1, characterized in that: The glass microspheres are prepared by chemical synthesis.

7. The color-adjustable and yellowing-resistant colored sand seam-beautifying agent according to claim 1, characterized in that: The functional additives include, by weight: 0.5-1 part of antioxidant BHT, 1-2 parts of thickener, 0.5-1 part of defoamer, and 0.5-1 part of ultraviolet absorber.

8. The color-adjustable and yellowing-resistant colored sand seam-beautifying agent according to claim 1, characterized in that: The weight ratio of the A component to the B component is 10:

1.

9. A method for preparing the color-adjustable and yellowing-resistant colored sand seam-beautifying agent according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Mix the modified hydrogenated epoxy resin, epoxy active diluent, defoamer and silane coupling agent and stir for 10-20 minutes, then add glass microspheres and hydrophobic fumed silica, stir for 1-2 hours, control the temperature not exceeding 60° C., and evacuate for 30 minutes to obtain component A; S2, disperse and stir the epoxy curing agent and the functional additive for 10-20 minutes, then add the precipitated fumed silica and the hydrophilic fumed silica, disperse and stir for 1-2 hours, control the temperature not to exceed 60°C, and evacuate for 30 minutes to obtain component B; S3. When using, the component A and the component B are mixed according to the proportion.

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