Aqueous high gloss stain resistant acrylic emulsion for pigments and method of making

Abstract

The application discloses a kind of high light stain-resistant acrylic emulsion for water-based pigment and preparation method thereof, using butyl acrylate, methyl methacrylate, styrene, acrylic acid-2-ethylhexyl ester and acrylic acid as raw material, with reactive emulsifier, anionic emulsifier and non-ionic emulsifier as emulsification system, ammonium persulfate as initiator, add acrylamide, methyl methacrylate, ultraviolet light absorber, anti-adhesive agent, vinyl trimethoxysilane crosslinking monomer, using pre-emulsified semi-continuous seed emulsion core-shell polymerization process synthesis.The application uses reactive emulsifier, adopts core-shell polymerization technology, introduces organic silicon functional monomer, double crosslinking technology of internal crosslinking and functional crosslinking monomer, through particle control technology, to obtain high-performance acrylic emulsion for pigment with high gloss and gloss retention, high surface hardness and high stain resistance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of high polymer coating, and relates to an acrylic emulsion, in particular to a high-gloss stain-resistant acrylic emulsion for water-based pigments and a preparation method thereof. BACKGROUND

[0002] Water-based acrylic pigments are a new industry gradually emerging in the art painting industry in recent years, and are non-toxic and harmless to the human body. The new product meets the pursuit of people for the optical effect of painting, and can make the painting product still have the effect of bright as new after long-term preservation. The acrylic pigment will replace ordinary oil-based pigments and will be a general trend in the entire painting industry.

[0003] However, the acrylic emulsion currently used for manufacturing painting pigments in China is mainly for building coating emulsion, and cannot well meet the performance requirements of the emulsion for acrylic pigments.

[0004] The general building emulsion can meet the performance requirements such as scrub resistance, water resistance and alkali resistance, but when applied in art painting, the stain resistance and adhesion of the general building emulsion are not as good as those of the special product. In particular, the high-quality painting pigment requires higher stain resistance and gloss in addition to the performance required by general pigments.

[0005] Therefore, there is a need for an emulsion suitable for acrylic pigments in the market. SUMMARY

[0006] The present application aims to solve the problems of the prior art and provide a high-gloss stain-resistant acrylic emulsion for water-based pigments and a preparation method thereof.

[0007] The present application successfully develops a water-based acrylic emulsion for pigments with high gloss, gloss retention, high surface hardness and high stain resistance by using advanced polymerization process and appropriate raw material ratio, using reactive emulsifiers, adopting core-shell polymerization technology, introducing organic silicon functional monomers, using double crosslinking technology of internal crosslinking and room temperature self-crosslinking, adding ultraviolet light absorbers during the reaction process, and adding anti-sticking agents, etc. The water resistance, gloss and stain resistance of the high-gloss stain-resistant acrylic emulsion for water-based pigments prepared by the present application are greatly improved compared with the prior art, the volatile additive is less, it is green and environmentally friendly, and it is simple and convenient to use, storage-resistant, and can be used in various different water-based acrylic pigment systems.

[0008] Another object of the present application is to provide a high-gloss stain-resistant acrylic emulsion for water-based pigments and a preparation method thereof.

[0009] To achieve the above object, the present application adopts the following technical solutions:

[0010] The present application first provides a water-based high-gloss stain-resistant acrylic emulsion for pigments, which is synthesized by using butyl acrylate, methyl methacrylate, styrene, 2-ethylhexyl acrylate and acrylic acid as raw materials, using a reactive emulsifier, an anionic-nonionic emulsifier and a nonionic emulsifier as an emulsifying system, using ammonium persulfate as an initiator, adding acrylamide, isobornyl methacrylate, an ultraviolet light absorber, an anti-sticking agent and a vinyl trimethoxysilane crosslinking monomer, and using a pre-emulsified semi-continuous seed emulsion core-shell polymerization process.

[0011] As a preferred scheme of the present application, the components are mixed in the following proportions by mass percentage: butyl acrylate 5-15%, methyl methacrylate 10-25%, styrene 3-15%, 2-ethylhexyl acrylate 2-10%, acrylic acid 0.5-2.0%, reactive emulsifier 0.1-0.5%, anionic-nonionic emulsifier 0.2-2.5%, nonionic emulsifier 0.1-1.0%, ammonium persulfate 0.1-0.3%, acrylamide 0.5-1.5%, isobornyl methacrylate 0.2-1.0%, ultraviolet light absorber 0.05-0.5%, anti-sticking agent 0.1-0.5%, vinyl trimethoxysilane 0.5-1.3%, and deionized water 45-55%.

[0012] As a preferred scheme of the present application, the reactive emulsifier is sodium allyloxy hydroxypropyl sulfonate.

[0013] As a preferred scheme of the present application, the anionic-nonionic emulsifier is a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium dodecyl diphenyl ether disulfate.

[0014] As a preferred scheme of the present application, the nonionic emulsifier is isomeric C13 fatty alcohol polyoxyethylene ether.

[0015] As a preferred scheme of the present application, the ultraviolet light absorber includes one or a combination of UV571, UV-1, UV-123 and UV-1130.

[0016] As a preferred scheme of the present application, the anti-sticking agent includes one or a combination of SAINO 9168, SF-510KY and TEGO-2700.

[0017] The present application also provides a preparation method of the water-based high-gloss stain-resistant acrylic emulsion for pigments, which comprises the following steps:

[0018] (1) Pre-emulsification: 3 / 4 of the allyloxy hydroxypropyl sodium sulfonate, fatty alcohol polyoxyethylene ether sodium sulfate, sodium dodecyl diphenyl ether disulfate, isomeric C13 fatty alcohol polyoxyethylene ether, acrylamide, isobornyl methacrylate, 2 / 3 acrylic acid, butyl acrylate, styrene, 4 / 5 methyl methacrylate and 4 / 5 ammonium persulfate are emulsified under high-speed stirring conditions for 0.5-1h to obtain a pre-emulsion for later use;

[0019] (2) Acrylic acid-2-ethylhexyl ester, 1 / 5 methyl methacrylate, vinyl trimethoxysilane and 1 / 3 acrylic acid monomer mixture are used as a post-monomer for later use.

[0020] (3) 1 / 4 of the allyloxy hydroxypropyl sodium sulfonate, fatty alcohol polyoxyethylene ether sodium sulfate, sodium dodecyl diphenyl ether disulfate, isomeric C13 fatty alcohol polyoxyethylene ether, deionized water are added to the reaction kettle, heated to 80-90℃, 5% of the pre-emulsion of step (1) is added as a seed solution, then 1 / 5 of the ammonium persulfate aqueous solution is added.

[0021] (4) The remaining pre-emulsion of step (1) is added dropwise to the reaction kettle of step (3), the reaction temperature is controlled at 82-85℃, the dropwise addition time is 2.5h, after the dropwise addition is completed, the temperature is kept at 80-85℃ for 1.0h, then the temperature is lowered to 45℃, ammonia water is added to adjust the pH to neutral, then ultraviolet light absorbers and anti-sticking agents are added, and the product is discharged to obtain a water-based pigment high-light stain-resistant acrylic emulsion.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] 1) Unlike ordinary acrylic emulsion on the market, the present application uses a special seed core-shell polymerization process, introduces special organic silicon functional monomers, optimizes the emulsifying system and selects reactive emulsifiers, uses double crosslinking technology of internal and external crosslinking and functional monomers, and uses core-shell technology to enrich organic silicon monomers in the shell layer to make the latex film structure dense and form a low surface energy surface.

[0024] 2) The present application controls the particle size and particle size dispersion coefficient of the latex particles through particle control technology, and makes the latex particles with moderate and uniform particle size and distribution, so that the latex film forms a dense surface structure.

[0025] 3)The present application adopts surface control technology, adds ultraviolet light absorber in the reaction process, and adds anti-sticking agent after the reaction is completed, so that the latex film does not yellow and powder after long time storage, and meanwhile, the surface control technology that the anti-sticking agent can be delaminated to the surface of the film surface when the acrylic pigment is formed, so that the latex film still has good flatness after long time storage, thereby improving the gloss and stain resistance of the latex film. Meanwhile, by selecting appropriate wetting agent and studying the collocation and dosage of hydrophilic monomer, the color brightness of the finished product acrylic pigment is improved. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Embodiment 1

[0028] The present embodiment provides a high-gloss stain-resistant acrylic emulsion for water-based pigments, and the ratio of each component is as follows in percentage: butyl acrylate 8.5%, methyl methacrylate 25%, styrene 3.0%, 2-ethylhexyl acrylate 6.7%, acrylic acid 0.6%, sodium allyloxy hydroxypropyl sulfonate 0.2%, sodium fatty alcohol polyoxyethylene ether sulfate 0.6%, sodium dodecyl diphenyl ether disulfonate 0.3%, isomeric C13 fatty alcohol polyoxyethylene ether 0.4%, ammonium persulfate 0.1%, acrylamide 0.5%, isobornyl methacrylate 0.8%, ultraviolet light absorber 0.35% (a mixture of UV-1, UV-123 and UV-1130 with a mass ratio of 1:1:1), anti-sticking agent 0.3% (SF-510KY), vinyl trimethoxysilane 0.8%, and deionized water 51.85%.

[0029] The preparation method of the above-mentioned high-gloss stain-resistant acrylic emulsion for water-based pigments includes the following steps:

[0030] (1) Pre-emulsification: first, 3 / 4 of sodium allyloxy hydroxypropyl sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate, sodium dodecyl diphenyl ether disulfonate, isomeric C13 fatty alcohol polyoxyethylene ether, acrylamide, isobornyl methacrylate, 2 / 3 of acrylic acid, butyl acrylate, styrene, 4 / 5 of methyl methacrylate, and 4 / 5 of ammonium persulfate are added to the emulsification kettle under high-speed stirring conditions for 0.5-1h to obtain a pre-emulsion for standby use,

[0031] (2) 2-ethylhexyl acrylate, 1 / 5 of methyl methacrylate, vinyl trimethoxysilane, and 1 / 3 of acrylic acid monomer are mixed as a post-monomer for standby use;

[0032] (3) After adding 1 / 4 allyloxy hydroxypropyl sulfonate sodium, fatty alcohol polyoxyethylene ether sulfate sodium salt, sodium dodecyl diphenyl ether disulfonate, isomeric C13 fatty alcohol polyoxyethylene ether, deionized water into the reactor, heating to 80-90℃, adding 5% of (1) pre-emulsion as seed solution, then adding 1 / 5 ammonium persulfate aqueous solution;

[0033] (4) Adding the remaining pre-emulsion of step (1) into the reactor of step (3) dropwise, controlling the reaction temperature at 82-85℃, the dropwise time is 2.5h, after the completion of dropwise, keeping warm for 1.0h, then cooling to 80-85℃, starting to add the remaining monomers (2), the dropwise time is 1.5h, after the completion of dropwise, keeping warm at 80-90℃ for 1.0h, cooling to 45℃, adding appropriate amount of ammonia to adjust the pH to neutral, then adding ultraviolet light absorber and anti-sticking agent, and discharging to obtain the water-based high gloss stain-resistant acrylic emulsion for pigments.

[0034] Example 2

[0035] The present embodiment provides a water-based high gloss stain-resistant acrylic emulsion for pigments, the ratio of each component is as follows: butyl acrylate 15.0%, methyl methacrylate 10.7%, styrene 15%, 2-ethylhexyl acrylate 2.0%, acrylic acid 1.6%, allyloxy hydroxypropyl sulfonate sodium 0.4%, fatty alcohol polyoxyethylene ether sulfate sodium salt 0.2%, sodium dodecyl diphenyl ether disulfonate 0.7%, isomeric C13 fatty alcohol polyoxyethylene ether 0.6%, ammonium persulfate 0.15%, acrylamide 0.9%, isobornyl methacrylate 0.2%, ultraviolet light absorber 0.15% (a mixture of UV571, UV-1 and UV-123 with a mass ratio of 1:1:1), anti-sticking agent 0.2% (SAINO 9168), vinyl trimethoxysilane 0.5%, and deionized water 51.7%.

[0036] The preparation method of the above-mentioned water-based high gloss stain-resistant acrylic emulsion for pigments comprises the following steps:

[0037] (1) Pre-emulsification: adding 3 / 4 of allyloxy hydroxypropyl sulfonate sodium, fatty alcohol polyoxyethylene ether sulfate sodium salt, sodium dodecyl diphenyl ether disulfonate, isomeric C13 fatty alcohol polyoxyethylene ether, acrylamide, isobornyl methacrylate, 2 / 3 acrylic acid, butyl acrylate, styrene, 4 / 5 methyl methacrylate, and 4 / 5 ammonium persulfate into the emulsification kettle under high-speed stirring conditions to obtain a pre-emulsion for 0.5-1h,

[0038] (2) Mixing 2-ethylhexyl acrylate, 1 / 5 methyl methacrylate, vinyl trimethoxysilane, and 1 / 3 acrylic acid monomers as remaining monomers for standby;

[0039] (3) In the reactor, add 1 / 4 allyloxy hydroxypropyl sulfonic acid sodium, fatty alcohol polyoxyethylene ether sodium sulfate, sodium dodecyl diphenyl ether disulfate, isomeric C13 fatty alcohol polyoxyethylene ether, deionized water, and heat to 80-90℃, add 5% of (1) pre-emulsion as seed solution, then add 1 / 5 ammonium persulfate aqueous solution;

[0040] (4) To the reactor of step (3), add the remaining pre-emulsion of step (1) dropwise, control the reaction temperature at 82-85℃, the dropwise time is 2.5h, after the completion of dropwise, keep warm for 1.0h, then cool to 80-85℃, start to add the remaining monomer (2), the dropwise time is 1.5h, after the completion of dropwise, keep warm at 80-90℃ for 1.0h, cool to 45℃, add appropriate amount of ammonia to adjust the pH to neutral, then add ultraviolet light absorber and anti-sticking agent, and discharge to obtain the finished product of water-based high gloss stain-resistant acrylic emulsion for pigments.

[0041] Example 3

[0042] The present embodiment provides a water-based high gloss stain-resistant acrylic emulsion for pigments, the ratio of each component is as follows: butyl acrylate 6.5%, methyl methacrylate 18.5%, styrene 8.5%, 2-ethylhexyl acrylate 10.0%, acrylic acid 1.1%, allyloxy hydroxypropyl sulfonic acid sodium 0.5%, fatty alcohol polyoxyethylene ether sodium sulfate 0.4%, sodium dodecyl diphenyl ether disulfate 0.5%, isomeric C13 fatty alcohol polyoxyethylene ether 0.2%, ammonium persulfate 0.1%, acrylamide 0.6%, isobornyl methacrylate 0.4%, ultraviolet light absorber 0.2% (a mixture of UV571, UV-123 and UV-1130 with a mass ratio of 1:1:1), anti-sticking agent 0.25% (TEGO-2700), vinyl trimethoxysilane 0.7%, and deionized water 51.55%.

[0043] The preparation method of the above-mentioned water-based high gloss stain-resistant acrylic emulsion for pigments comprises the following steps:

[0044] (1) Pre-emulsification: add 3 / 4 of allyloxy hydroxypropyl sulfonic acid sodium, fatty alcohol polyoxyethylene ether sodium sulfate, sodium dodecyl diphenyl ether disulfate, isomeric C13 fatty alcohol polyoxyethylene ether, acrylamide, isobornyl methacrylate, 2 / 3 acrylic acid, butyl acrylate, styrene, 4 / 5 methyl methacrylate, and 4 / 5 ammonium persulfate into the emulsification kettle under high-speed stirring conditions to emulsify for 0.5-1h to obtain a pre-emulsion for standby use,

[0045] (2) Mix 2-ethylhexyl acrylate, 1 / 5 methyl methacrylate, vinyl trimethoxysilane, and 1 / 3 acrylic acid monomers as the remaining monomer for standby use;

[0046] (3) In the reactor, add 1 / 4 allyloxy hydroxypropyl sulfonic acid sodium, fatty alcohol polyoxyethylene ether sulfate sodium salt, sodium dodecyl diphenyl ether disulfonate, isomeric C13 fatty alcohol polyoxyethylene ether, deionized water, and then heat to 80-90℃, add 5% of (1) pre-emulsion as seed solution, then add 1 / 5 ammonium persulfate aqueous solution;

[0047] (4) To the reactor of step (3), add the remaining pre-emulsion of step (1) dropwise, control the reaction temperature at 82-85℃, the dropwise time is 2.5h, after the completion of dropwise, keep warm for 1.0h, then cool to 80-85℃, start to add the remaining monomer (2), the dropwise time is 1.5h, after the completion of dropwise, keep warm at 80-90℃ for 1.0h, cool to 45℃, add appropriate amount of ammonia to adjust the pH to neutral, then add ultraviolet light absorber and anti-sticking agent, and discharge to obtain the water-based high gloss stain-resistant acrylic emulsion product for pigments.

[0048] The following specific examples 4 and 5 are used as a comparison, using special organic silicon functional monomers, emulsifying system, selecting reactive emulsifiers, adopting double crosslinking technology of internal and external crosslinking with functional monomers, and anti-sticking agent.

[0049] Example 4

[0050] The water-based high gloss stain-resistant acrylic emulsion for pigments provided by the present embodiment has the following component ratio in percentage: butyl acrylate 8.0%, methyl methacrylate 18.95%, styrene 9.0%, 2-ethylhexyl acrylate 8.5%, acrylic acid 1.1%, fatty alcohol polyoxyethylene ether sulfate sodium salt 0.4%, sodium dodecyl diphenyl ether disulfonate 0.5%, isomeric C13 fatty alcohol polyoxyethylene ether 0.2%, ammonium persulfate 0.1%, acrylamide 0.6%, isobornyl methacrylate 0.4%, vinyl trimethoxysilane 0.7%, and deionized water 51.55%.

[0051] The preparation method of the above water-based high gloss stain-resistant acrylic emulsion for pigments includes the following steps:

[0052] (1) Pre-emulsification: first add 3 / 4 of fatty alcohol polyoxyethylene ether sulfate sodium salt, sodium dodecyl diphenyl ether disulfonate, isomeric C13 fatty alcohol polyoxyethylene ether, acrylamide, isobornyl methacrylate, 2 / 3 of acrylic acid, butyl acrylate, styrene, 4 / 5 of methyl methacrylate, and 4 / 5 of ammonium persulfate into the emulsification kettle, and emulsify under high-speed stirring conditions for 0.5-1h to obtain a pre-emulsion for standby use,

[0053] (2) Mix 2-ethylhexyl acrylate, 1 / 5 of methyl methacrylate, vinyl trimethoxysilane, and 1 / 3 of acrylic acid monomers as the remaining monomer for standby use;

[0054] (3) In the reaction kettle, add 1 / 4 fatty alcohol polyoxyethylene ether sodium sulfate, sodium dodecyl diphenyl ether disulfonate, isomeric C13 fatty alcohol polyoxyethylene ether, deionized water, and heat to 80-90℃, add 5% of (1) pre-emulsion as seed solution, then add 1 / 5 aqueous solution of ammonium persulfate prepared;

[0055] (4) To the reaction kettle of step (3), add the remaining pre-emulsion of step (1) dropwise, control the reaction temperature at 82-85℃, the dropwise time is 2.5h, after the dropwise completion, keep warm for 1.0h, then cool to 80-85℃, start to add the remaining monomer (2), the dropwise time is 1.5h, after the dropwise completion, keep warm at 80-90℃ for 1.0h, cool to 45℃, add appropriate amount of ammonia water to adjust the pH to neutral, then discharge to obtain the water-based high gloss stain-resistant acrylic emulsion for pigments.

[0056] Example 5

[0057] The present embodiment provides a water-based high gloss stain-resistant acrylic emulsion for pigments, the ratio of each component is as follows: butyl acrylate 8.7%, methyl methacrylate 18.95%, styrene 9.0%, 2-ethylhexyl acrylate 8.5%, acrylic acid 1.1%, fatty alcohol polyoxyethylene ether sodium sulfate 0.4%, sodium dodecyl diphenyl ether disulfonate 0.5%, isomeric C13 fatty alcohol polyoxyethylene ether 0.2%, ammonium persulfate 0.1%, acrylamide 0.6%, isobornyl methacrylate 0.4%, and deionized water 51.55%.

[0058] The preparation method of the above-mentioned water-based high gloss stain-resistant acrylic emulsion for pigments comprises the following steps:

[0059] (1) Pre-emulsification: first add 3 / 4 of fatty alcohol polyoxyethylene ether sodium sulfate, sodium dodecyl diphenyl ether disulfonate, isomeric C13 fatty alcohol polyoxyethylene ether, acrylamide, isobornyl methacrylate, 2 / 3 acrylic acid, butyl acrylate, styrene, 4 / 5 methyl methacrylate, and 4 / 5 ammonium persulfate into the emulsification kettle under high-speed stirring conditions to emulsify for 0.5-1h to obtain a pre-emulsion for standby use,

[0060] (2) Mix 2-ethylhexyl acrylate, 1 / 5 methyl methacrylate, and 1 / 3 acrylic acid monomers as the remaining monomer for standby use;

[0061] (3) In the reaction kettle, add 1 / 4 fatty alcohol polyoxyethylene ether sodium sulfate, sodium dodecyl diphenyl ether disulfonate, isomeric C13 fatty alcohol polyoxyethylene ether, and deionized water, and heat to 80-90℃, add 5% of (1) pre-emulsion as seed solution, then add 1 / 5 aqueous solution of ammonium persulfate prepared;

[0062] (4) to the reactor of step (3) drop the remaining pre-emulsion of step (1), the reaction temperature is controlled at 82-85℃, drop time 2.5h, after the drop is completed, keep warm for 1.0h, then cool to 80-85℃, start to drop the monomer (2), drop time 1.5h, after the drop is completed, keep warm at 80-90℃ for 1.0h, cool to 45℃, add appropriate amount of ammonia to adjust the pH to neutral, then discharge to obtain the water-based high gloss stain-resistant acrylic emulsion for pigments.

[0063] The index requirements of the water-based high gloss stain-resistant acrylic emulsion for pigments are shown in Table 1.

[0064] Table 1. Index requirements

[0065]

[0066] The performance of the water-based high gloss stain-resistant acrylic emulsion for pigments produced in Examples 1-5 was tested according to the above table detection content, and the test index is shown in Table 2.

[0067] Table 2. Test results

[0068]

[0069] From the comparison of Examples 4-5 and Examples 1-3, it can be seen that the performance of the product using the reactive emulsifying system, special silicone monomer, and ultraviolet absorber and anti-sticking agent system is more outstanding.

[0070] The above is only the preferred embodiment of the present application, and is not any form and substantial limitation of the present application. It should be noted that for ordinary skilled in the art, without departing from the method of the present application, a number of improvements and supplements can also be made, which are also considered as the protection range of the present application. For those skilled in the art, without departing from the spirit and scope of the present application, some changes, modifications and equivalent changes of the above disclosed technical content can be made, which are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above-mentioned embodiments according to the essential technology of the present application are still within the scope of the technical solutions of the present application.

Claims

1. An aqueous high gloss stain resistant acrylic emulsion for pigments, characterized by, The water-based high gloss stain-resistant acrylic emulsion for pigments is synthesized by using pre-emulsified semi-continuous seed emulsion core-shell polymerization process with butyl acrylate, methyl methacrylate, styrene, 2-ethylhexyl acrylate and acrylic acid as raw materials, reactive emulsifier, anionic-nonionic emulsifier and nonionic emulsifier as emulsification system, ammonium persulfate as initiator, and adding acrylamide, isobornyl methacrylate, ultraviolet light absorber, anti-sticking agent and vinyl trimethoxysilane crosslinking monomer; the mass percentage of each component is as follows: butyl acrylate 5-15%, methyl methacrylate 10-25%, styrene 3-15%, 2-ethylhexyl acrylate 2-10%, acrylic acid 0.5-2.0%, reactive emulsifier 0.1-0.5%, anionic-nonionic emulsifier 0.2-2.5%, nonionic emulsifier 0.1-1.0%, ammonium persulfate 0.1-0.3%, acrylamide 0.5-1.5%, isobornyl methacrylate 0.2-1.0%, ultraviolet light absorber 0.05-0.5%, anti-sticking agent 0.1-0.5%, vinyl trimethoxysilane 0.5-1.3% and deionized water 45-55%; the reactive emulsifier is sodium allyloxy hydroxypropyl sulfonate, the anionic-nonionic emulsifier is a mixture of sodium fatty alcohol polyoxyethylene ether sulfate and sodium dodecyl diphenyl ether disulfate, and the nonionic emulsifier is isomeric C13 fatty alcohol polyoxyethylene ether; the anti-sticking agent includes one or several combinations of SF-510KY and TEGO-2700; The preparation method of the water-based high gloss stain-resistant acrylic emulsion for pigments comprises the following steps: (1) pre-emulsification: 3 / 4 of sodium allyloxy hydroxypropyl sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate, sodium dodecyl diphenyl ether disulfate, isomeric C13 fatty alcohol polyoxyethylene ether, acrylamide, isobornyl methacrylate, 2 / 3 of acrylic acid, butyl acrylate, styrene, 4 / 5 of methyl methacrylate and 4 / 5 of ammonium persulfate are added into an emulsification kettle under high-speed stirring for 0.5-1 h to obtain a pre-emulsified solution for standby use; (2) 2-ethylhexyl acrylate, 1 / 5 of methyl methacrylate, vinyl trimethoxysilane and 1 / 3 of acrylic acid monomer are mixed as after-remaining monomers for standby use; (3) 1 / 4 of sodium allyloxy hydroxypropyl sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate, sodium dodecyl diphenyl ether disulfate, isomeric C13 fatty alcohol polyoxyethylene ether and deionized water are added into a reaction kettle, and then the temperature is raised to 80-90℃, 5% of the pre-emulsified solution in step (1) is added as a seed solution, and then 1 / 5 of an aqueous solution of ammonium persulfate is added; (4) to the reactor of step (3) drop the remaining pre-emulsion of step (1), the reaction temperature is controlled at 82-85℃, the drop time is 2.5h, after the drop is completed, keep warm for 1.0h, then cool to 80-85℃, start to drop the remaining monomer of step (2), the drop time is 1.5h, after the drop is completed, keep warm at 80-90℃ for 1.0h, cool to 45℃, add ammonia to adjust the pH to neutral, then add the ultraviolet light absorber and the anti-sticking agent, and discharge to obtain the high-gloss stain-resistant acrylic emulsion product for water-based pigments.

2. The high gloss stain resistant acrylic emulsion for water-based paint according to claim 1, characterized by, The ultraviolet light absorber comprises one or several combinations of UV571, UV-1, UV-123 and UV-1130.

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