High-strength JS waterproof emulsion and preparation process thereof

Abstract

The application relates to the technical field of waterproof emulsion, and discloses a high-strength JS waterproof emulsion and a preparation process thereof, wherein the high-strength JS waterproof emulsion comprises the following components in parts by weight: emulsion A, emulsion B and external crosslinking monomers; the emulsion A comprises the following components in parts by weight: styrene, acrylic ester soft monomers, internal crosslinking monomers, functional monomers, diacetone acrylamide, an anionic emulsifier, a non-ionic emulsifier and initiator A; and the emulsion B comprises the following components in parts by weight: acrylic ester soft monomers, functional monomers, diacetone acrylamide, an anionic emulsifier and initiator B. Through the technical scheme, the problems of low mechanical strength and easy water absorption of the JS waterproof emulsion in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of waterproof emulsion, in particular to a high-strength JS waterproof emulsion and a preparation process thereof. BACKGROUND

[0002] JS waterproof paint is a high-molecular polymer acrylate waterproof paint, belongs to an improved JS composite waterproof paint, is widely used for roof waterproofing of industrial and civil buildings, is usually organic liquid material composed of polymer emulsion and various additives, and is inorganic powder material composed of cement, quartz sand, light and heavy calcium carbonate and various additives, and is a two-component water-based building waterproof paint prepared through reasonable proportioning and compounding. The JS waterproof paint is green, environmentally friendly, stable in performance, excellent in aging resistance, long in waterproof life, and has a good application prospect. However, the existing JS waterproof emulsion has the problems of low mechanical strength and easy water absorption. SUMMARY

[0003] The application provides a high-strength JS waterproof emulsion and a preparation process thereof, and solves the problems of low mechanical strength and easy water absorption of the JS waterproof emulsion in the prior art.

[0004] The technical scheme of the application is as follows:

[0005] The application provides a high-strength JS waterproof emulsion, which comprises the following components in parts by weight: emulsion A 90-110 parts, emulsion B 1.5-13 parts, and external crosslinking monomer 1-2 parts.

[0006] The emulsion A comprises the following components in parts by weight: styrene 125-155 parts, acrylate soft monomer 325-390 parts, internal crosslinking monomer 13.5-18.5 parts, functional monomer 10-25 parts, diacetone acrylamide 7-9 parts, anionic emulsifier 10-15 parts, non-ionic emulsifier 0.5-2 parts, and initiator A 2.5-3.5 parts.

[0007] The emulsion B comprises the following components in parts by weight: acrylate soft monomer 80-95 parts, functional monomer 200-225 parts, diacetone acrylamide 4-5 parts, anionic emulsifier 20-22 parts, and initiator B 0.3-1 part.

[0008] As a further technical scheme, the mass ratio of the emulsion A to the emulsion B is 20:0.5-0.7.

[0009] As a further technical scheme, the acrylate soft monomer comprises at least one of n-butyl acrylate, tert-butyl acrylate and ethyl acrylate; the internal crosslinking monomer comprises at least one of divinylbenzene and allyl methacrylate; and the external crosslinking monomer comprises at least one of adipic acid dihydrazide and isocyanate.

[0010] As a further technical solution, the functional monomer includes at least one of triphenylethyl phenol polyoxyethylene ether methacrylate, unsaturated carboxylic acid functional monomer, and unsaturated hydroxyl functional monomer.

[0011] As a further technical solution, the unsaturated carboxylic acid functional monomer includes at least one of acrylic acid and methacrylic acid.

[0012] As a further technical solution, the unsaturated hydroxyl functional monomer includes at least one of hydroxyethyl acrylate and hydroxypropyl methacrylate.

[0013] As a further technical solution, the initiator A and the initiator B are each independently at least one of ammonium persulfate, sodium persulfate, and potassium persulfate; and the anionic emulsifier is at least one of emulsifier 3203N, emulsifier SVS, and emulsifier EPA073.

[0014] As a further technical solution, the high-strength JS waterproof emulsion includes the following components in parts by weight: emulsion A 90-110 parts, emulsion B 1.5-13 parts, and external crosslinking monomer 1-2 parts.

[0015] The emulsion A includes the following components in parts by weight: styrene 125-155 parts, acrylate soft monomer 325-390 parts, internal crosslinking monomer 13.5-18.2 parts, functional monomer 12-21 parts, diacetone acrylamide 7.5-8.5 parts, anionic emulsifier 12-13 parts, non-ionic emulsifier 0.8-1 part, and initiator A 2.5-3 parts.

[0016] The emulsion B includes the following components in parts by weight: acrylate soft monomer 80-90 parts, functional monomer 199-225 parts, diacetone acrylamide 4-5 parts, anionic emulsifier 20.5-21.5 parts, and initiator B 0.3-0.9 parts.

[0017] As a further technical solution, the emulsion A includes the following components in parts by weight: styrene 125-155 parts, n-butyl acrylate 260-280 parts, t-butyl acrylate 65-110 parts, hydroxypropyl methacrylate 12-23 parts, allyl methacrylate 12-16 parts, divinylbenzene 1.5-2.2 parts, diacetone acrylamide 7.5-8.5 parts, anionic emulsifier 12-13 parts, non-ionic emulsifier 0.8-1 part, and initiator A 2.5-3 parts.

[0018] The emulsion B comprises the following components by weight: 80-90 parts of ethyl acrylate, 55-70 parts of hydroxyethyl acrylate, 125-130 parts of methacrylic acid, 4-5 parts of diacetone acrylamide, 19-25 parts of triphenylethyl phenol polyoxyethylene ether methacrylate, 20.5-21.5 parts of an anionic emulsifier, 0.3-0.8 parts of initiator B.

[0019] The application further provides a preparation process of the high-strength JS waterproof emulsion.

[0020] S1, according to the components of the emulsion A, after mixing the anionic emulsifier and deionized water, the styrene, the acrylate soft monomer, the internal crosslinking monomer and the functional monomer are added and mixed and emulsified to obtain a pre-emulsion A;

[0021] 1-1.5 parts of initiator A and 10-20 parts of deionized water are mixed to obtain an initial initiator A solution;

[0022] The remaining initiator A and 25-35 parts of deionized water are mixed to obtain a second initiator A solution;

[0023] The non-ionic emulsifier and deionized water are mixed to obtain a non-ionic emulsifier solution;

[0024] The non-ionic emulsifier solution, the initial initiator A solution and 4-5% of the pre-emulsion A are mixed, the remaining pre-emulsion A and the second initiator A solution are added, the diacetone acrylamide is added dropwise for mixing, the pH is adjusted to 7.5-8, and then filtration is performed to obtain the emulsion A;

[0025] S2, according to the components of the emulsion B, 10-15 parts of anionic emulsifier and deionized water are mixed, and then the acrylate soft monomer and the functional monomer are added and mixed and emulsified to obtain a pre-emulsion B;

[0026] 0.1-0.5 parts of initiator B and 5-10 parts of deionized water are mixed to obtain an initial initiator B solution;

[0027] The remaining initiator B and 25-35 parts of deionized water are mixed to obtain a second initiator B solution;

[0028] The remaining anionic emulsifier and deionized water are mixed to obtain an anionic emulsifier solution;

[0029] The anionic emulsifier solution, the initial initiator B solution and 4.5-5.5% of the pre-emulsion B are mixed, the remaining pre-emulsion B and the second initiator B solution are added, the diacetone acrylamide is added dropwise for mixing, and then filtration is performed to obtain the emulsion B;

[0030] S3, mixing the emulsion A, the emulsion B and the external crosslinking monomer to obtain the high-strength JS waterproof emulsion.

[0031] The working principle and beneficial effects of the present application are as follows:

[0032] In the present application, the emulsion A and the emulsion B are mixed, which has the effects of dispersion, thickening and anti-settling, and can also play a role in dispersing the powder. The emulsion A and the emulsion B penetrate each other during the drying process of the coating film, and through the external crosslinking agent, the coating film density and the tensile strength of the coating film are improved, and the mechanical properties and waterproofness of the JS waterproof emulsion are significantly improved. In addition, the high-strength JS waterproof emulsion synthesized by the present application is green and environmentally friendly, does not contain APEO, and is free of formaldehyde, ammonia and other pollution emissions. The product is uniformly dispersed and has excellent stability. DETAILED DESCRIPTION

[0033] 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 are within the scope of protection of the present application.

[0034] In the following examples and comparative examples, the CAS number of styrene is 100-42-5; the CAS number of n-butyl acrylate is 141-32-2; the CAS number of tert-butyl acrylate is 1663-39-4; the CAS number of hydroxypropyl methacrylate is 27813-02-1; the CAS number of allyl methacrylate is 96-05-9; the CAS number of divinylbenzene is 1321-74-0; and the CAS number of diacetone acrylamide is 2873-97-4.

[0035] Example 1

[0036] The high-strength JS waterproof emulsion comprises the following components in parts by weight: emulsion A 100 parts, emulsion B 3 parts, and external crosslinking monomer 1 part.

[0037] The emulsion A comprises the following components in parts by weight: styrene 145 parts, n-butyl acrylate 280 parts, tert-butyl acrylate 70 parts, hydroxypropyl methacrylate 21 parts, allyl methacrylate 13 parts, divinylbenzene 2 parts, diacetone acrylamide 8 parts, emulsifier 3203N 12 parts, emulsifier SVS 0.5 parts, emulsifier 3400K 0.83 parts, and sodium persulfate 2.9 parts.

[0038] Emulsion B includes the following components by weight: ethyl acrylate 90 parts, hydroxyethyl acrylate 59 parts, methacrylic acid 128 parts, diacetone acrylamide 4.4 parts, triphenylethyl phenol polyoxyethylene ether methacrylate 21 parts, emulsifier EPA073 21 parts, ammonium persulfate 0.5 parts;

[0039] The preparation process of high-strength JS waterproof emulsion includes the following steps:

[0040] S1, according to the component formula of emulsion A: prepare polymer emulsion by semi-continuous dropping method, add 180 parts of deionized water to the pre-emulsification kettle, start stirring, add emulsifier 3203N, emulsifier SVS, add styrene, n-butyl acrylate, t-butyl acrylate, hydroxypropyl methacrylate, divinylbenzene, allyl methacrylate after 15 minutes, continue to stir and emulsify for about 20 minutes, and obtain pre-emulsion A;

[0041] Mix 1.3 parts of sodium persulfate and 10 parts of deionized water to obtain initial initiator A solution;

[0042] Mix the remaining sodium persulfate and 30 parts of deionized water to obtain the second initiator A solution;

[0043] Add 220 parts of deionized water to the reaction kettle, start stirring, add emulsifier 3400K, heat to 86℃, add 4.5% mass of pre-emulsion A, initial initiator A solution, wait for the temperature to rise to the highest and stabilize for 2 minutes, then start dropping the remaining pre-emulsion A, drop the second initiator A solution, the dropping temperature is controlled at 85-87℃, the dropping time is 220 minutes, when dropping to 150 minutes, add diacetone acrylamide to the pre-emulsion, stir uniformly, after dropping, keep warm for 60 minutes, cool to below 40℃, adjust the pH to 7.5-8 with 15wt% sodium hydroxide solution, add 20 parts of deionized water after adding, filter to obtain emulsion A;

[0044] S2, according to the component formula of emulsion B: prepare polymer emulsion by semi-continuous dropping method, add 318 parts of deionized water to the pre-emulsification kettle, start stirring, add 12 parts of emulsifier EPA073, add ethyl acrylate, hydroxyethyl acrylate, methacrylic acid, triphenylethyl phenol polyoxyethylene ether methacrylate after 15 minutes, continue to stir and emulsify for 20 minutes to obtain pre-emulsion B;

[0045] Mix 0.2 parts of ammonium persulfate and 5 parts of deionized water to obtain initial initiator B solution;

[0046] Mix the remaining ammonium persulfate and 30 parts of deionized water to obtain the second initiator B solution;

[0047] Into a reaction kettle, 300 parts of deionized water was added, stirring was started, 9 parts of emulsifier EPA073 was added, when the temperature was raised to 88℃, 4.9% by mass of pre-emulsion B, initial initiator B solution was added, after the temperature rose to the highest and was stable for 2 minutes, the remaining pre-emulsion B was started to be added dropwise, the second initiator B solution was added dropwise, the dropwise adding temperature was controlled at 86-88℃, the dropwise adding time was 120 minutes, when the dropwise adding was to 90 minutes, diacetone acrylamide was added into the pre-emulsion, stirring was uniform. After the dropwise adding was completed, the temperature was kept for 60 minutes, the temperature was reduced to below 40℃, after filtration, emulsion B was obtained;

[0048] S3, the emulsion A was mixed with the emulsion B, adipic acid dihydrazide was added, after mixing, high-strength JS waterproof emulsion was obtained.

[0049] Example 2

[0050] The high-strength JS waterproof emulsion comprises the following components in parts by weight: emulsion A 105 parts, emulsion B 2.5 parts, external crosslinking monomer 1.2 parts;

[0051] The emulsion A comprises the following components in parts by weight: styrene 153 parts, n-butyl acrylate 277 parts, t-butyl acrylate 65 parts, hydroxypropyl methacrylate 23 parts, allyl methacrylate 12 parts, divinylbenzene 2.2 parts, diacetone acrylamide 7.5 parts, emulsifier 3203N 12.6 parts, emulsifier SVS 0.4 parts, emulsifier 3400K 0.76 parts, sodium persulfate 3.1 parts;

[0052] The emulsion B comprises the following components in parts by weight: ethyl acrylate 95 parts, hydroxyethyl acrylate 55 parts, methacrylic acid 129 parts, diacetone acrylamide 4.7 parts, triphenyl ethyl phenol polyoxyethylene ether methacrylate 19 parts, emulsifier EPA073 20.6 parts, ammonium persulfate 0.6 parts;

[0053] The preparation process of the high-strength JS waterproof emulsion comprises the following steps:

[0054] S1, according to the component formula of the emulsion A: the polymer emulsion was prepared by using semi-continuous dropwise adding method, 180 parts of deionized water was added into a pre-emulsification kettle, stirring was started, emulsifier 3203N, emulsifier SVS was added, 15 minutes later, styrene, n-butyl acrylate, t-butyl acrylate, hydroxypropyl methacrylate, divinylbenzene, allyl methacrylate was added, stirring and emulsification was continued for 20 minutes, pre-emulsion A was obtained;

[0055] 1.1 parts of sodium persulfate and 10 parts of deionized water were mixed to obtain an initial initiator A solution;

[0056] The remaining sodium persulfate and 30 parts of deionized water were mixed to obtain a second initiator A solution;

[0057] Into the reactor, 220 parts of deionized water was added, and stirring was started. When the temperature was raised to 86°C, 4.9% by mass of pre-emulsion A and initial initiator A solution were added. After the temperature was raised to the highest and stabilized for 2 minutes, the remaining pre-emulsion A and second initiator A solution were added dropwise. The temperature during the dropwise addition was controlled at 85-87°C, and the dropwise addition time was 220 minutes. When the dropwise addition was completed, the temperature was maintained for 60 minutes. Then, the temperature was lowered to below 40°C, and the pH was adjusted to 7.5-8 with 15 wt% sodium hydroxide solution. After that, 20 parts of deionized water was added, and the emulsion A was obtained after filtration.

[0058] S2, according to the component formula of emulsion B: a semi-continuous dropwise addition method was used to prepare a polymer emulsion. Into the pre-emulsification kettle, 318 parts of deionized water was added, and stirring was started. After 15 minutes, 12 parts of emulsifier EPA073, ethyl acrylate, hydroxyethyl acrylate, methyl methacrylate, and triphenyl ethyl phenol polyoxyethylene ether methacrylate were added. The pre-emulsion B was prepared by continuing to stir and emulsify at high speed for about 20 minutes.

[0059] 0.23 parts of ammonium persulfate and 5 parts of deionized water were mixed to obtain the initial initiator B solution;

[0060] The remaining ammonium persulfate and 30 parts of deionized water were mixed to obtain the second initiator B solution;

[0061] Into the reactor, 300 parts of deionized water was added, and stirring was started. When the temperature was raised to 88°C, 4.9% by mass of pre-emulsion B and initial initiator B solution were added. After the temperature was raised to the highest and stabilized for 2 minutes, the remaining pre-emulsion B and second initiator B solution were added dropwise. The temperature during the dropwise addition was controlled at 86-88°C, and the dropwise addition time was 120 minutes. When the dropwise addition was completed, the temperature was maintained for 60 minutes. Then, the temperature was lowered to below 40°C, and the emulsion B was obtained after filtration.

[0062] S3, the emulsion A and the emulsion B were mixed, and adipic acid dihydrazide was added. After mixing, the high-strength JS waterproof emulsion was obtained.

[0063] Example 3

[0064] The high-strength JS waterproof emulsion comprises the following components by weight: emulsion A 90-110 parts, emulsion B 1.5-13 parts, and external crosslinking monomer 1-1.2 parts.

[0065] Emulsion A includes the following components by weight: styrene 125 parts, n-butyl acrylate 260 parts, t-butyl acrylate 110 parts, hydroxypropyl methacrylate 18 parts, allyl methacrylate 16 parts, divinylbenzene 1.5 parts, diacetone acrylamide 8.5 parts, emulsifier 3203N 11 parts, emulsifier SVS 1 part, emulsifier 3400K 0.96 parts, sodium persulfate 2.7 parts;

[0066] Emulsion B includes the following components by weight: ethyl acrylate 80 parts, hydroxyethyl acrylate 69 parts, methacrylic acid 125 parts, diacetone acrylamide 4 parts, triphenyl ethyl phenol polyoxyethylene ether methacrylate 23 parts, emulsifier EPA 0 7321 parts, ammonium persulfate 0.43 parts;

[0067] The preparation process of the high-strength JS waterproof emulsion includes the following steps:

[0068] S1, according to the component formula of emulsion A: using semi-continuous dropping method to prepare polymer emulsion, adding 170 parts of deionized water into the pre-emulsification kettle, starting stirring, adding emulsifier 3203N, emulsifier SVS, after 15 minutes, adding styrene, n-butyl acrylate, t-butyl acrylate, hydroxypropyl methacrylate, divinylbenzene, allyl methacrylate, continuing to stir and emulsify for about 20 minutes, obtaining pre-emulsion A;

[0069] Mixing 1 part of sodium persulfate and 10 parts of deionized water to obtain an initial initiator A solution;

[0070] Mixing the remaining sodium persulfate and 30 parts of deionized water to obtain a second initiator A solution;

[0071] Adding 230 parts of deionized water into the reaction kettle, starting stirring, adding emulsifier 3400K, when the temperature is raised to 86℃, adding 4.5% mass of pre-emulsion A, initial initiator A solution, after the temperature is raised to the highest and stable for 2 minutes, starting dropping the remaining pre-emulsion A, dropping the second initiator A solution, the dropping temperature is controlled at 85-87℃, the dropping time is 220 minutes, when dropping to 150 minutes, adding diacetone acrylamide into the pre-emulsion, stirring uniformly, after the dropping is completed, keeping warm for 60 minutes, reducing the temperature to below 40℃, adjusting the pH to 7.5-8 with 15wt% sodium hydroxide solution, adding 20 parts of deionized water after adding, filtering to obtain emulsion A;

[0072] S2, according to the component formula of emulsion B: using semi-continuous dropping method to prepare polymer emulsion, 318 parts of deionized water was added into pre-emulsification kettle, stirring was started, 11 parts of emulsifier EPA073 was added, 15 min later, ethyl acrylate, hydroxyethyl acrylate, methacrylic acid, triphenyl ethyl phenol polyoxyethylene ether methacrylate was added, and high-speed stirring emulsification was continued for about 20 min to obtain pre-emulsified solution B;

[0073] 0.16 parts of ammonium persulfate and 5 parts of deionized water were mixed to obtain initial initiator B solution;

[0074] The remaining ammonium persulfate and 30 parts of deionized water were mixed to obtain the second initiator B solution;

[0075] 300 parts of deionized water was added into the reaction kettle, stirring was started, 10 parts of emulsifier EPA073 was added, when the temperature was raised to 88℃, 4.9% mass of pre-emulsified solution B, initial initiator B solution was added, after the temperature was raised to the highest and stabilized for 2 min, the remaining pre-emulsified solution B was started to be added dropwise, the second initiator B solution was added dropwise, the dropping temperature was controlled at 86-88℃, the dropping time was 120 min, when the dropping was completed, the temperature was kept for 60 min, the temperature was reduced to below 40℃, and then the emulsion B was obtained after filtration;

[0076] S3, the emulsion A and the emulsion B were mixed, and adipic acid dihydrazide was added, and then high-strength JS waterproof emulsion was obtained after mixing.

[0077] Example 4

[0078] The difference between this embodiment and example 1 is only that 90 parts of emulsion A and 13 parts of emulsion B are added in the components of high-strength JS waterproof emulsion.

[0079] Example 5

[0080] The difference between this embodiment and example 1 is only that 110 parts of emulsion A and 1.7 parts of emulsion B are added in the components of high-strength JS waterproof emulsion.

[0081] Example 6

[0082] The difference between this embodiment and example 1 is only that 80 parts of ethyl acrylate, 69 parts of hydroxyethyl acrylate, 133 parts of methacrylic acid, 4 parts of diacetone acrylamide and 13 parts of triphenyl ethyl phenol polyoxyethylene ether methacrylate are added in the components of emulsion B.

[0083] Comparative Example 1

[0084] The difference between the present comparative example and example 1 is only that 110 parts of ethyl acrylate, 39 parts of hydroxyethyl acrylate, 128 parts of methacrylic acid, 4 parts of diacetone acrylamide and 21 parts of triphenyl ethyl phenol polyoxyethylene ether methacrylate are added to the components of emulsion B.

[0085] Comparative example 2

[0086] The difference between the present comparative example and example 1 is only that the components of the high-strength JS waterproof emulsion include only emulsion A.

[0087] The high-strength JS waterproof emulsions prepared in examples 1-6 and comparative examples 1-2 are respectively tested for mechanical properties and water absorption rate according to the standard GB / T 23445-2009 “Polymer cement waterproof coating”, and the test results are shown in Table 1.

[0088] Table 1 Test results of waterproof emulsion performance

[0089]

[0090] It can be seen from the data of examples 1-6 and comparative examples 1-2 and commercially available emulsions that, compared with comparative examples 1-2 and commercially available emulsions, the JS waterproof emulsion prepared in examples 1-6 has higher tensile strength and does not turn white after the coating film is dried, which indicates that mixing emulsion A and emulsion B according to the formulation of the present application can significantly improve the tensile strength of the JS waterproof emulsion and the coating film does not turn white after coating, the product is uniformly dispersed and has excellent stability, and the JS waterproof emulsion prepared in examples 1-6 has lower water absorption rate compared with commercially available emulsions, which indicates that the high-strength JS waterproof emulsion synthesized in the present application has more excellent waterproofness.

[0091] The above is only a preferred embodiment of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-strength JS waterproof emulsion, characterized by, The emulsion A comprises the following components by weight: styrene 125~155 parts, acrylate soft monomer 325~390 parts, internal crosslinking monomer 13.5~18.5 parts, functional monomer 10~25 parts, diacetone acrylamide 7~9 parts, anionic emulsifier 10~15 parts, nonionic emulsifier 0.5~2 parts, initiator A 2.5~3.5 parts; The emulsion B comprises the following components by weight: acrylate soft monomer 80~95 parts, functional monomer 199~225 parts, diacetone acrylamide 4~5 parts, anionic emulsifier 20~22 parts, initiator B 0.3~1 part; The internal crosslinking monomer comprises at least one of divinylbenzene, allyl methacrylate; the external crosslinking monomer comprises at least one of adipic acid dihydrazide, isocyanate; The functional monomer comprises at least one of triphenylethyl phenol polyoxyethylene ether methacrylate, unsaturated carboxylic acid functional monomer, unsaturated hydroxyl functional monomer. The mass ratio of the emulsion A and the emulsion B is 20:0.5~0.

7.

2. The high-strength JS waterproof emulsion according to claim 1, characterized in that, The acrylate soft monomer comprises at least one of n-butyl acrylate, t-butyl acrylate, ethyl acrylate.

3. The high-strength JS waterproof emulsion according to claim 1, characterized in that, The unsaturated carboxylic acid functional monomer comprises at least one of acrylic acid, methacrylic acid.

4. The high-strength JS waterproof emulsion according to claim 1, characterized in that, The unsaturated hydroxyl functional monomer comprises at least one of hydroxyethyl acrylate, hydroxypropyl methacrylate.

5. The high-strength JS waterproof emulsion according to claim 1, characterized in that, The emulsion A comprises the following components by weight: styrene 125~155 parts, acrylate soft monomer 325~390 parts, internal crosslinking monomer 13.5~18.2 parts, functional monomer 12~21 parts, diacetone acrylamide 7.5~8.5 parts, anionic emulsifier 12~13 parts, nonionic emulsifier 0.8~1 part, initiator A 2.5~3 parts; 6. The high-strength JS waterproof emulsion according to claim 1, characterized in that, The emulsion B comprises the following components by weight: acrylate soft monomer 80~90 parts, functional monomer 199~225 parts, diacetone acrylamide 4~5 parts, anionic emulsifier 20.5~21.5 parts, initiator B 0.3~0.9 parts. The emulsion A comprises the following components by weight: styrene 125~155 parts, n-butyl acrylate 260~280 parts, t-butyl acrylate 65~110 parts, hydroxypropyl methacrylate 12~23 parts, allyl methacrylate 12~16 parts, divinylbenzene 1.5~2.2 parts, diacetone acrylamide 7.5~8.5 parts, anionic emulsifier 12~13 parts, nonionic emulsifier 0.8~1 part, initiator A 2.5~3 parts; ​ 7. The high-strength JS waterproof emulsion according to claim 5, characterized in that, ​ The emulsion B comprises the following components in parts by weight: ethyl acrylate 80-90 parts, hydroxyethyl acrylate 55-70 parts, methacrylic acid 125-130 parts, diacetone acrylamide 4-5 parts, triphenylethyl phenol polyoxyethylene ether methacrylate 19-25 parts, anionic emulsifier 20.5-21.5 parts, initiator B 0.3-0.8 parts.

8. The high-strength JS waterproof emulsion according to claim 1, characterized in that, The initiator A and the initiator B are each independently at least one of ammonium persulfate, sodium persulfate, potassium persulfate; the anionic emulsifier is at least one of emulsifier 3203N, emulsifier SVS, emulsifier EPA073.

9. The preparation process of high-strength JS waterproof emulsion according to any one of claims 1-8, characterized in that, The method comprises the following steps: S1, according to the components of the emulsion A, the anionic emulsifier and deionized water are mixed, then the styrene, acrylate soft monomer, internal crosslinking monomer and functional monomer are added and mixed to obtain a pre-emulsion A; 1-1.5 parts of initiator A and deionized water are mixed to obtain an initial initiator A solution; The remaining initiator A and deionized water are mixed to obtain a second initiator A solution; The nonionic emulsifier and deionized water are mixed to obtain a nonionic emulsifier solution; The nonionic emulsifier solution, the initial initiator A solution and 4%-5% of the pre-emulsion A by mass are mixed, then the remaining pre-emulsion A and the second initiator A solution are mixed, the diacetone acrylamide is added dropwise for mixing, the pH is adjusted to 7.5-8, and filtration is performed to obtain the emulsion A; S2, according to the components of the emulsion B, 10-15 parts of anionic emulsifier and deionized water are mixed, then the acrylate soft monomer and the functional monomer are added and mixed to obtain a pre-emulsion B; 0.1-0.5 parts of initiator B and deionized water are mixed to obtain an initial initiator B solution; The remaining initiator B and deionized water are mixed to obtain a second initiator B solution; The remaining anionic emulsifier and deionized water are mixed to obtain an anionic emulsifier solution; The anionic emulsifier solution, the initial initiator B solution and 4.5%-5.5% of the pre-emulsion B by mass are mixed, then the remaining pre-emulsion B and the second initiator B solution are mixed, the diacetone acrylamide is added dropwise for mixing, and filtration is performed to obtain the emulsion B; S3, the emulsion A, the emulsion B and the external crosslinking monomer are mixed to obtain a high-strength JS waterproof emulsion.

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