阅读说明：本技术 一种防水涂料及其制备方法 (Waterproof coating and preparation method thereof ) 是由 王�忠 樊民 应慧春 于 2021-09-14 设计创作，主要内容包括：本发明涉及涂料技术领域,尤其涉及一种防水涂料及其制备方法。所述防水涂料包括以下重量份的制备原料：反1,4-聚异戊二烯橡胶改性丙烯酸酯乳液40～60份；硅丙弹性乳液5～15份；成膜助剂1～5份；高韧性聚合物材料10～20份；石英砂5～10份；云母粉5～10份；消泡剂0.1～1份；分散剂0.1～1份；防腐剂0.1～1份；增稠剂0.1～1份；色浆0.1～0.5份；水5～20份。通过使用反1,4-聚异戊二烯橡胶改性丙烯酸酯,可以有效提高丙烯酸树脂的耐水性能和力学性能,使用反1,4-聚异戊二烯橡胶改性丙烯酸酯乳液作为成膜剂,可以使制备的防水涂料具有更优的耐水性能,抗撕裂强度高,膜层强度高。(The invention relates to the technical field of coatings, in particular to a waterproof coating and a preparation method thereof. The waterproof coating comprises the following preparation raw materials in parts by weight: 40-60 parts of trans-1, 4-polyisoprene rubber modified acrylate emulsion; 5-15 parts of silicone-acrylic elastic emulsion; 1-5 parts of a film forming auxiliary agent; 10-20 parts of a high-toughness polymer material; 5-10 parts of quartz sand; 5-10 parts of mica powder; 0.1-1 part of defoaming agent; 0.1-1 part of a dispersant; 0.1-1 part of preservative; 0.1-1 part of a thickening agent; 0.1-0.5 part of color paste; 5-20 parts of water. The waterproof coating has the advantages that the water resistance and mechanical property of the acrylic resin can be effectively improved by using the trans-1, 4-polyisoprene rubber modified acrylate emulsion, and the prepared waterproof coating has better water resistance, high tear resistance and high film strength by using the trans-1, 4-polyisoprene rubber modified acrylate emulsion as the film forming agent.)

1. The waterproof coating comprises the following preparation raw materials in parts by weight:

2. the waterproof coating of claim 1, wherein the trans 1, 4-polyisoprene rubber modified acrylate emulsion comprises the following raw materials in parts by weight:

3. the waterproof coating material of claim 2, wherein the trans 1, 4-polyisoprene rubber modified acrylate emulsion is prepared by the following method:

a1) stirring trans-1, 4-polyisoprene rubber latex and a silane coupling agent at 60-80 ℃ to obtain a first mixed solution;

b1) mixing the first mixed solution, methyl methacrylate, butyl acrylate, acrylic acid, part of sodium dodecyl benzene sulfonate, part of fatty alcohol-polyoxyethylene ether and water, and stirring to obtain a second mixed solution;

c1) and mixing the second mixed solution, the residual sodium dodecyl benzene sulfonate, the residual fatty alcohol-polyoxyethylene ether and ammonium persulfate in a nitrogen atmosphere, and stirring to obtain the trans-1, 4-polyisoprene rubber modified acrylate emulsion.

4. The waterproof coating of claim 2, wherein the trans 1, 4-polyisoprene rubber latex comprises the following raw materials in parts by weight:

5. the waterproof coating material according to claim 2, wherein the trans 1, 4-polyisoprene rubber latex is prepared by the following method:

a2) stirring trans-1, 4-polyisoprene rubber and cyclohexane at 40-50 ℃ to obtain a third mixed solution;

b2) mixing the third mixed solution, potassium oleate, a surfactant, a potassium hydroxide solution and water, and then continuously stirring to obtain a fourth mixed solution;

c2) emulsifying the fourth mixed solution at 3800-4200 r/min to obtain an emulsion;

d2) and distilling the emulsion at 40-50 ℃ under reduced pressure to obtain the trans-1, 4-polyisoprene rubber latex.

6. The waterproof coating material of claim 5, wherein in the step a2), the stirring speed is 300-500 r/min, and the stirring time is 3-5 h;

in the step b2), the rotating speed of the continuous stirring is 800-1200 r/min, and the time is 25-35 min;

in the step c2), the emulsifying time is 5-10 min.

7. The water resistant coating of claim 1 wherein the coalescent comprises at least one of dipropylene glycol butyl ether, dipropylene glycol methyl ether, and propylene glycol methyl ether acetate;

the high-toughness polymer material comprises at least one of polyester fiber, wood fiber and polytetrafluoroethylene powder.

8. The waterproof coating material according to claim 1, wherein the defoaming agent is a silicone defoaming agent;

the dispersant comprises sodium hexametaphosphate;

the preservative comprises isothiazolinone;

the thickening agent comprises fumed silica.

9. A preparation method of a waterproof coating comprises the following steps:

A) mixing water, trans-1, 4-polyisoprene rubber modified acrylate emulsion, silicone-acrylic elastic emulsion, film forming auxiliary agent, dispersing agent, preservative and color paste, and stirring;

B) mixing the slurry stirred in the step A), quartz sand, mica powder and a high-toughness polymer material, and then continuing stirring;

C) mixing the stirred feed liquid obtained in the step B) with a thickening agent;

D) and C), mixing the mixed material liquid obtained in the step C) with a defoaming agent, and stirring to obtain the waterproof coating.

10. The preparation method according to claim 9, wherein in the step A), the rotation speed of the stirring is 500-600 r/min;

in the step B), the rotating speed of the continuous stirring is 300-500 r/min;

in the step D), the rotating speed of stirring is 100-200 r/min.

Technical Field

The invention relates to the technical field of coatings, in particular to a waterproof coating and a preparation method thereof.

Background

The waterproof materials on the market mainly comprise two types: waterproof coiled material and waterproof paint. Waterproofing membrane mainly uses pitch coiled material, polypropylene fiber coiled material as the main material, through covering the face that leaks to this reaches waterproof purpose, waterproofing membrane need carry out the measure and tailor clothing according to waterproof basic unit's shape in the work progress, needs the polylith concatenation to complicated base face, and the bonding degree of difficulty of mutual overlap joint between the coiled material is great, appears the seepage very easily, and waterproofing membrane has defects such as high energy consumption, high pollution, construction complicacy, easy seepage.

The waterproof paint mainly comprises polyurethane waterproof paint, polymer cement-based waterproof paint, single-component polymer waterproof paint and the like, wherein the polyurethane waterproof paint is generally prepared by taking polyurethane and asphalt or coal tar as raw materials, has certain toxicity, can release volatile benzene solvents in the construction process to generate decoration pollution, and has poor bonding performance with a base material and difficult construction. The polymer cement-based waterproof coating is a bi-component waterproof coating compounded by liquid materials and matched powder materials, wherein the liquid materials are formed by combining high-molecular polymer emulsion, such as polyacrylate, polyvinyl acetate, styrene butadiene rubber emulsion and various additives, and the matched powder materials are matched with each other, so that the polymer cement-based waterproof coating has the advantages of mutually combining inorganic components and organic components, complementing each other, having superior comprehensive performance and reaching better waterproof effect, but the polymer cement-based waterproof coating is bi-component, and the liquid materials and the powder materials need to be mixed and stirred according to a certain proportion on site in the construction process and then are constructed, and the proportion precision is difficult to control in the site proportioning process, so that the prepared waterproof coating is unstable, the performance deviation is easy to occur, and the site stirring is carried out, so that more bubbles in the solution exist, and the service performance of the coating is also influenced. The single-component polymer waterproof paint is a thick coating material formed by combining high-molecular polymer emulsion, such as polyacrylate, polyvinyl acetate, styrene butadiene rubber emulsion, polyurethane emulsion and the like, matched with fillers and various additives. However, the existing single-component polymer waterproof coating still has some defects, such as poor water resistance, low tear resistance, low overall strength of a film layer and the like.

Disclosure of Invention

In view of the above, the technical problem to be solved by the present invention is to provide a waterproof coating and a preparation method thereof, and a waterproof film layer obtained by the waterproof coating provided by the present invention has excellent mechanical properties and water resistance.

The invention provides a waterproof coating which comprises the following preparation raw materials in parts by weight:

preferably, the trans-1, 4-polyisoprene rubber modified acrylate emulsion comprises the following preparation raw materials in parts by weight:

preferably, the trans 1, 4-polyisoprene rubber modified acrylate emulsion is prepared according to the following method:

a1) stirring trans-1, 4-polyisoprene rubber latex and a silane coupling agent at 60-80 ℃ to obtain a first mixed solution;

b1) mixing the first mixed solution, methyl methacrylate, butyl acrylate, acrylic acid, part of sodium dodecyl benzene sulfonate, part of fatty alcohol-polyoxyethylene ether and water, and stirring to obtain a second mixed solution;

c1) and mixing the second mixed solution, the residual sodium dodecyl benzene sulfonate, the residual fatty alcohol-polyoxyethylene ether and ammonium persulfate in a nitrogen atmosphere, and stirring to obtain the trans-1, 4-polyisoprene rubber modified acrylate emulsion.

Preferably, the trans-1, 4-polyisoprene rubber latex comprises the following preparation raw materials in parts by weight:

preferably, the trans 1, 4-polyisoprene rubber latex is prepared according to the following method:

a2) stirring trans-1, 4-polyisoprene rubber and cyclohexane at 40-50 ℃ to obtain a third mixed solution;

b2) mixing the third mixed solution, potassium oleate, a surfactant, a potassium hydroxide solution and water, and then continuously stirring to obtain a fourth mixed solution;

c2) emulsifying the fourth mixed solution at 3800-4200 r/min to obtain an emulsion;

d2) and distilling the emulsion at 40-50 ℃ under reduced pressure to obtain the trans-1, 4-polyisoprene rubber latex.

Preferably, in the step a2), the rotation speed of the stirring is 300-500 r/min, and the time is 3-5 h;

in the step b2), the rotating speed of the continuous stirring is 800-1200 r/min, and the time is 25-35 min;

in the step c2), the emulsifying time is 5-10 min.

Preferably, the film forming aid comprises at least one of dipropylene glycol butyl ether, dipropylene glycol methyl ether, and propylene glycol monomethyl ether acetate;

the high-toughness polymer material comprises at least one of polyester fiber, wood fiber and polytetrafluoroethylene powder.

Preferably, the defoaming agent is an organic silicon defoaming agent;

the dispersant comprises sodium hexametaphosphate;

the preservative comprises isothiazolinone;

the thickening agent comprises fumed silica.

The invention also provides a preparation method of the waterproof coating, which comprises the following steps:

A) mixing water, trans-1, 4-polyisoprene rubber modified acrylate emulsion, silicone-acrylic elastic emulsion, film forming auxiliary agent, dispersing agent, preservative and color paste, and stirring;

B) mixing the slurry stirred in the step A), quartz sand, mica powder and a high-toughness polymer material, and then continuing stirring;

C) mixing the stirred feed liquid obtained in the step B) with a thickening agent;

D) and C), mixing the mixed material liquid obtained in the step C) with a defoaming agent, and stirring to obtain the waterproof coating.

Preferably, in the step A), the rotating speed of the stirring is 500-600 r/min;

in the step B), the rotating speed of the continuous stirring is 300-500 r/min;

in the step D), the rotating speed of stirring is 100-200 r/min.

The invention provides a waterproof coating which comprises the following preparation raw materials in parts by weight: 40-60 parts of trans-1, 4-polyisoprene rubber modified acrylate emulsion; 5-15 parts of silicone-acrylic elastic emulsion; 1-5 parts of a film forming auxiliary agent; 10-20 parts of a high-toughness polymer material; 5-10 parts of quartz sand; 5-10 parts of mica powder; 0.1-1 part of defoaming agent; 0.1-1 part of a dispersant; 0.1-1 part of preservative; 0.1-1 part of a thickening agent; 0.1-0.5 part of color paste; 5-20 parts of water. According to the invention, the trans-1, 4-polyisoprene rubber modified acrylate is used, so that the water resistance of the acrylic resin can be effectively improved, the mechanical property of the acrylate is greatly improved after modification, and the prepared waterproof coating has more excellent water resistance, high tear resistance, high film strength, wear resistance and long service life by using the trans-1, 4-polyisoprene rubber modified acrylate emulsion as a film forming agent.

The experimental result shows that according to GB/T16777 and 2008, the tensile strength of the waterproof coating is not lower than 3.3MPa, and after the waterproof coating is treated for 30min under the condition of 0.3MPa, the waterproof coating is impermeable; the water resistance of the waterproof coating is detected according to the standard GB/T9755-2014, and no foaming or falling is caused after 144 hours; the dynamic cracking resistance of the waterproof coating is detected according to the standard JG/T157-2004, and when the base layer crack is larger than 0.7mm, the coating layer has no crack and the dynamic cracking resistance is better.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a waterproof coating which comprises the following preparation raw materials in parts by weight:

the raw materials for preparing the waterproof coating provided by the invention comprise trans-1, 4-polyisoprene rubber modified acrylate emulsion. The weight part of the trans-1, 4-polyisoprene rubber modified acrylate emulsion is 40-60 parts. In certain embodiments of the present invention, the trans 1, 4-polyisoprene rubber modified acrylate emulsion is present in an amount of 40 parts, 45 parts, 50 parts, 55 parts or 60 parts by weight.

In certain embodiments of the present invention, the trans 1, 4-polyisoprene rubber modified acrylate emulsion comprises the following raw materials in parts by weight:

in certain embodiments of the present invention, the trans 1, 4-polyisoprene rubber latex is 20 parts by weight.

In certain embodiments of the present invention, the silane coupling agent is present in an amount of 7 parts by weight. In certain embodiments of the present invention, the silane coupling agent comprises silane coupling agent VP 151.

In certain embodiments of the present invention, the weight part of the methyl methacrylate is 20 parts.

In certain embodiments of the present invention, the butyl acrylate is present in an amount of 15 parts by weight.

In certain embodiments of the present invention, the acrylic acid is present in an amount of 5 parts by weight.

In certain embodiments of the present invention, the sodium dodecylbenzenesulfonate is 0.6 parts by weight.

In certain embodiments of the present invention, the fatty alcohol-polyoxyethylene ether is present in an amount of 2.4 parts by weight. In certain embodiments of the present invention, the fatty alcohol-polyoxyethylene ether comprises AEO-3.

In certain embodiments of the present invention, the weight part of the ammonium persulfate is 0.25 parts.

In certain embodiments of the present invention, the water is 30 parts by weight. In certain embodiments of the present invention, the water is deionized water.

In certain embodiments of the present invention, the trans 1, 4-polyisoprene rubber latex comprises the following raw materials in parts by weight:

in certain embodiments of the present invention, the trans 1, 4-polyisoprene rubber is present in 4 parts by weight. In certain embodiments of the invention, the trans 1, 4-polyisoprene rubber has a number average molecular weight of 1000000 or more.

In certain embodiments of the present invention, the cyclohexane is present in an amount of 46 parts by weight.

In certain embodiments of the present invention, the weight part of the potassium oleate is 1 part.

In certain embodiments of the present invention, the surfactant is present in an amount of 1 part by weight. In certain embodiments of the invention, the surfactant is Span 80.

In certain embodiments of the present invention, the part by weight of the lye is 1 part.

In certain embodiments of the invention, the lye is a potassium hydroxide solution. In some embodiments, the concentration of the potassium hydroxide solution is 0.4-0.6 mol/L. In certain embodiments, the concentration of the potassium hydroxide solution is 0.5 mol/L.

In certain embodiments of the present invention, the water is 47 parts by weight. In certain embodiments of the present invention, the water is deionized water.

In certain embodiments of the present invention, the trans 1, 4-polyisoprene rubber latex is prepared according to the following method:

a2) stirring trans-1, 4-polyisoprene rubber and cyclohexane at 40-50 ℃ to obtain a third mixed solution;

b2) mixing the third mixed solution, potassium oleate, a surfactant, a potassium hydroxide solution and water, and then continuously stirring to obtain a fourth mixed solution;

c2) emulsifying the fourth mixed solution at 3800-4200 r/min to obtain an emulsion;

d2) and distilling the emulsion at 40-50 ℃ under reduced pressure to obtain the trans-1, 4-polyisoprene rubber latex.

In the preparation method of the trans-1, 4-polyisoprene rubber latex, the adopted raw material components and the proportion are the same as above, and the details are not repeated.

Step a 2):

in certain embodiments of the invention, the temperature of the agitation is 40 ℃.

In some embodiments of the invention, the rotation speed of the stirring is 300 to 500r/min, and the time is 3 to 5 hours. In certain embodiments, the rotational speed of the agitation is 500 r/min. In certain embodiments, the time of stirring is 3 hours.

Step b 2):

in some embodiments of the present invention, step b2) specifically includes:

and adding potassium oleate and a surfactant into the third mixed solution, adjusting the rotating speed to 800-1200 r/min, adding alkali liquor and water during stirring, and continuing stirring.

In some embodiments of the invention, the rotation speed of the continuous stirring is 800-1200 r/min, and the time is 25-35 min. In certain embodiments, the rotation speed for the continuous stirring is 1000 r/min. In certain embodiments, the time for continued stirring is 30 min.

In step c 2):

in certain embodiments of the invention, the emulsification is performed at 4000 r/min.

In some embodiments of the present invention, the time for emulsification is 5-10 min. In certain embodiments, the time of emulsification is 5 min.

In step d 2):

distilling the emulsion at 40-50 ℃ under reduced pressure, and distilling cyclohexane to obtain trans-1, 4-polyisoprene rubber latex.

In certain embodiments of the invention, the temperature of the reduced pressure distillation is 45 ℃.

In certain embodiments of the present invention, the trans 1, 4-polyisoprene rubber modified acrylate emulsion is prepared according to the following method:

a1) stirring trans-1, 4-polyisoprene rubber latex and a silane coupling agent at 60-80 ℃ to obtain a first mixed solution;

b1) mixing the first mixed solution, methyl methacrylate, butyl acrylate, acrylic acid, part of sodium dodecyl benzene sulfonate, part of fatty alcohol-polyoxyethylene ether and water, and stirring to obtain a second mixed solution;

c1) and mixing the second mixed solution, the residual sodium dodecyl benzene sulfonate, the residual fatty alcohol-polyoxyethylene ether and ammonium persulfate in a nitrogen atmosphere, and stirring to obtain the trans-1, 4-polyisoprene rubber modified acrylate emulsion.

Step a 1):

in certain embodiments of the invention, the temperature of the agitation is 75 ℃.

In some embodiments of the invention, the rotation speed of the stirring is 400-600 r/min, and the time is 25-35 min. In certain embodiments, the rotational speed of the agitation is 500 r/min. In certain embodiments, the time of stirring is 30 min.

In some embodiments of the present invention, after the stirring, the method further comprises: and cooling to room temperature.

Step b 1):

in some embodiments of the invention, the rotation speed of the stirring is 300 to 500r/min, and the time is 8 to 11 hours. In certain embodiments, the rotational speed of the agitation is 400 r/min. In certain embodiments, the time of stirring is 10 min.

In step c 1):

in some embodiments of the present invention, step c1) specifically comprises:

and heating the second mixed solution to 60-80 ℃ in a nitrogen atmosphere, adding the rest of sodium dodecyl benzene sulfonate, the rest of fatty alcohol-polyoxyethylene ether and ammonium persulfate, mixing, and stirring to obtain the trans-1, 4-polyisoprene rubber modified acrylate emulsion.

In certain embodiments of the invention, the second mixture is warmed to 70 ℃.

In some embodiments of the invention, the rotation speed of the stirring is 300 to 500r/min, and the time is 4 to 6 hours. In certain embodiments, the rotational speed of the agitation is 400 r/min. In certain embodiments, the time of stirring is 5 hours.

In some embodiments of the present invention, the mass ratio of the partial sodium dodecylbenzene sulfonate to the remaining sodium dodecylbenzene sulfonate is 0.1 to 0.3: 0.2 to 0.4. In certain embodiments, the mass ratio of the partial sodium dodecylbenzene sulfonate to the remaining sodium dodecylbenzene sulfonate is 0.2: 0.4.

in some embodiments of the present invention, the mass ratio of the partial fatty alcohol-polyoxyethylene ether to the remaining fatty alcohol-polyoxyethylene ether is 0.4-1.2: 0.8 to 2.4. In certain embodiments, the mass ratio of the portion of fatty alcohol-polyoxyethylene ether to the remaining fatty alcohol-polyoxyethylene ether is 0.8: 1.6.

the raw materials for preparing the waterproof coating provided by the invention also comprise silicone-acrylic elastic emulsion. The silicone-acrylic elastic emulsion is 5-15 parts by weight. In certain embodiments of the present invention, the silicone-acrylic elastic emulsion is 15 parts, 10 parts, or 5 parts by weight.

In certain embodiments of the present invention, the silicone-acrylic elastic emulsion has a solids content of 41% to 43%. In certain embodiments, the silicone-acrylic elastic emulsion has a solids content of 42%.

The raw materials for preparing the waterproof coating also comprise a film-forming assistant. The film-forming assistant is 1-5 parts by weight. In certain embodiments of the present invention, the film-forming aid is present in an amount of 3 parts by weight.

In certain embodiments of the present invention, the coalescent includes at least one of dipropylene glycol butyl ether, dipropylene glycol methyl ether, and propylene glycol monomethyl ether acetate.

The raw materials for preparing the waterproof coating also comprise a high-toughness polymer material. The high-toughness polymer material is 10-20 parts by weight. In certain embodiments of the present invention, the high tenacity polymeric material is present in 13 parts by weight.

In certain embodiments of the present invention, the high-tenacity polymeric material comprises at least one of polyester fibers, wood fibers, and polytetrafluoroethylene powder.

The raw materials for preparing the waterproof coating provided by the invention also comprise quartz sand. The weight part of the quartz sand is 5-10 parts. In certain embodiments of the present invention, the quartz sand is present in an amount of 6 parts by weight.

The raw materials for preparing the waterproof coating also comprise mica powder. The mica powder is 5-10 parts by weight. In certain embodiments of the present invention, the mica powder is present in an amount of 8 parts by weight.

The raw materials for preparing the waterproof coating also comprise a defoaming agent. The defoaming agent is 0.1-1 part by weight. In certain embodiments of the present invention, the defoamer is present in an amount of 0.2 parts by weight.

In certain embodiments of the present invention, the defoamer is a silicone defoamer.

The raw materials for preparing the waterproof coating also comprise a dispersant. The weight portion of the dispersant is 0.1-1. In certain embodiments of the present invention, the dispersant is present in an amount of 0.8 parts by weight.

In certain embodiments of the invention, the dispersant comprises sodium hexametaphosphate.

The raw materials for preparing the waterproof coating also comprise a preservative. The preservative is 0.1-1 part by weight. In certain embodiments of the present invention, the preservative is present in an amount of 0.2 parts by weight.

In certain embodiments of the invention, the preservative comprises an isothiazolinone, and in particular may be isothiazolinone LXE.

The raw materials for preparing the waterproof coating also comprise a thickening agent. The weight part of the thickening agent is 0.1-1 part. In certain embodiments of the present invention, the thickener is present in an amount of 0.2 parts by weight.

In certain embodiments of the present invention, the thickener comprises fumed silica.

The raw materials for preparing the waterproof coating also comprise color paste. The color paste is 0.1-0.5 part by weight. In some embodiments of the present invention, the color paste is 0.2 parts by weight.

In some embodiments of the present invention, the mill base is a white mill base.

The raw materials for preparing the waterproof coating also comprise water. The weight part of the water is 5-20 parts. In certain embodiments of the present invention, the water is present in an amount of 13.5 parts or 8.5 parts by weight.

In certain embodiments of the present invention, the water is deionized water.

The invention also provides a preparation method of the waterproof coating, which comprises the following steps:

A) mixing water, trans-1, 4-polyisoprene rubber modified acrylate emulsion, silicone-acrylic elastic emulsion, film forming auxiliary agent, dispersing agent, preservative and color paste, and stirring;

B) mixing the slurry stirred in the step A), quartz sand, mica powder and a high-toughness polymer material, and then continuing stirring;

C) mixing the stirred feed liquid obtained in the step B) with a thickening agent;

D) and C), mixing the mixed material liquid obtained in the step C) with a defoaming agent, and stirring to obtain the waterproof coating.

In the preparation method of the waterproof coating, the raw material components and the proportion are the same as above, and are not described again.

In step A):

in certain embodiments of the invention, step a) comprises in particular:

adding trans-1, 4-polyisoprene rubber modified acrylate emulsion, silicone-acrylic elastic emulsion, film-forming assistant, dispersant, preservative and color paste in water in sequence, and stirring.

In some embodiments of the present invention, the rotation speed of the stirring is 500 to 600r/min, and the time is 25 to 35 min. In certain embodiments, the rotational speed of the agitation is 550 r/min. In certain embodiments, the time of stirring is 30 min.

In step B):

under the condition of stirring, adding quartz sand, mica powder and a high-toughness polymer material into the slurry stirred in the step A), and continuously stirring.

In some embodiments of the invention, the rotation speed of the continuous stirring is 300-500 r/min, and the time is 25-35 min. In certain embodiments, the rotation speed for the continuous stirring is 400 r/min. In certain embodiments, the time for continued stirring is 30 min.

In step D):

in some embodiments of the present invention, the rotation speed of the stirring is 100 to 200r/min, and the time is 5 to 15 min. In certain embodiments, the rotational speed of the agitation is 150 r/min. In certain embodiments, the time of stirring is 10 min.

The source of the above-mentioned raw materials is not particularly limited, and the raw materials may be generally commercially available.

According to the invention, the trans-1, 4-polyisoprene rubber modified acrylate is used, so that the water resistance of the acrylic resin can be effectively improved, the mechanical property of the acrylate is greatly improved after modification, and the prepared waterproof coating has more excellent water resistance, high tear resistance, high film strength, wear resistance and long service life by using the trans-1, 4-polyisoprene rubber modified acrylate emulsion as a film forming agent.

In order to further illustrate the present invention, a waterproof coating material and a preparation method thereof provided by the present invention will be described in detail with reference to examples, which should not be construed as limiting the scope of the present invention.

The starting materials used in the following examples are all commercially available.

In examples, the number average molecular weight of the trans 1, 4-polyisoprene rubber is 1000000 or more.

Example 1

The waterproof coating comprises the following raw materials: 40 parts of trans-1, 4-polyisoprene rubber modified acrylate emulsion, 15 parts of silicone-acrylic elastic emulsion (with the solid content of 42%), 3 parts of film-forming additive, 13 parts of high-toughness polymer material, 6 parts of quartz sand, 8 parts of mica powder, 0.2 part of defoaming agent, 0.8 part of dispersing agent, 0.2 part of preservative, 0.2 part of thickening agent, 0.1 part of white color paste and 13.5 parts of deionized water.

The trans-1, 4-polyisoprene rubber modified acrylate emulsion is prepared according to the following method:

1) the preparation method of the trans-1, 4-polyisoprene rubber latex comprises the following steps:

a. adding 4 parts by weight of trans-1, 4-polyisoprene rubber and 46 parts by weight of cyclohexane into a reaction kettle, starting a stirrer, controlling the rotating speed of the stirrer at 500r/min, controlling the temperature at 40 ℃, and stirring for 3 hours;

b. adding 1 part by weight of potassium oleate and 801 parts by weight of Span, adjusting the rotating speed to 1000r/min, adding 1 part by weight of 0.5mol/L potassium hydroxide solution and 47 parts by weight of deionized water in the stirring process, and continuously stirring for 30 min;

c. starting an emulsification switch, wherein the emulsification rotation speed is 4000r/min, and the emulsification time is 5min to obtain an emulsion;

d. and distilling the emulsion at 45 ℃ under reduced pressure to obtain the trans-1, 4-polyisoprene rubber latex.

2) The preparation method of the trans-1, 4-polyisoprene rubber modified acrylate emulsion comprises the following steps:

a. adding 20 parts by weight of trans-1, 4-polyisoprene rubber latex and 7 parts by weight of silane coupling agent VP151 into a reaction kettle, heating to 75 ℃, stirring at 500r/min for 30min, and cooling to room temperature;

b. adding 20 parts by weight of methyl methacrylate, 15 parts by weight of butyl acrylate, 5 parts by weight of acrylic acid, 0.2 part by weight of sodium dodecyl benzene sulfonate, 30.8 parts by weight of AEO-and 30 parts by weight of deionized water into the reaction kettle, starting mechanical stirring, stirring for 10 hours at a stirring speed of 400 r/min;

c. introducing nitrogen into a reaction kettle for protection, raising the temperature to 70 ℃, adding 0.4 weight part of sodium dodecyl benzene sulfonate and 31.6 weight parts of AEO-and then adding 0.25 weight part of ammonium persulfate, and continuously stirring at 400r/min for 5 hours to obtain the trans-1, 4-polyisoprene rubber modified acrylate emulsion.

The film-forming assistant is dipropylene glycol butyl ester;

the high-toughness polymer material is wood fiber;

the defoaming agent is an organic silicon defoaming agent;

the dispersant is sodium hexametaphosphate;

the preservative is isothiazolinone LXE;

the thickening agent is fumed silica.

The preparation method of the waterproof coating comprises the following steps:

1. adding deionized water into a stirring kettle, sequentially adding trans-1, 4-polyisoprene rubber modified acrylate emulsion, silicone-acrylic elastic emulsion, film forming auxiliary agent, dispersing agent, preservative and white color paste, starting a stirrer, stirring for 30min, wherein the rotating speed of the stirrer is 550 r/min;

2. under the condition of stirring, adding quartz sand, mica powder and a high-toughness polymer material into the slurry stirred in the step (1), and stirring for 30min at the rotating speed of 400 r/min;

3. adding a thickening agent into the stirred feed liquid in the step 2;

4. and (3) adding a defoaming agent into the mixed material liquid obtained in the step (2), stirring for 10min at the stirring speed of 150r/min, and thus obtaining the waterproof coating.

Example 2

The waterproof coating comprises the following raw materials: 45 parts of trans-1, 4-polyisoprene rubber modified acrylate emulsion, 15 parts of silicone-acrylic elastic emulsion, 3 parts of film-forming additive, 13 parts of high-toughness polymer material, 6 parts of quartz sand, 8 parts of mica powder, 0.2 part of defoaming agent, 0.8 part of dispersing agent, 0.2 part of preservative, 0.2 part of thickening agent, 0.1 part of white color paste and 8.5 parts of deionized water.

The trans-1, 4-polyisoprene rubber modified acrylate emulsion is prepared according to the following method:

1) the preparation method of the trans-1, 4-polyisoprene rubber latex comprises the following steps:

a. adding 4 parts by weight of trans-1, 4-polyisoprene rubber and 46 parts by weight of cyclohexane into a reaction kettle, starting a stirrer, controlling the rotating speed of the stirrer at 500r/min, controlling the temperature at 40 ℃, and stirring for 3 hours;

b. adding 1 part by weight of potassium oleate and 801 parts by weight of Span, adjusting the rotating speed to 1000r/min, adding 1 part by weight of 0.5mol/L potassium hydroxide solution and 47 parts by weight of deionized water in the stirring process, and continuously stirring for 30 min;

c. starting an emulsification switch, wherein the emulsification rotation speed is 4000r/min, and the emulsification time is 5min to obtain an emulsion;

d. and distilling the emulsion at 45 ℃ under reduced pressure to obtain the trans-1, 4-polyisoprene rubber latex.

2) The preparation method of the trans-1, 4-polyisoprene rubber modified acrylate emulsion comprises the following steps:

a. adding 20 parts by weight of trans-1, 4-polyisoprene rubber latex and 7 parts by weight of silane coupling agent VP151 into a reaction kettle, heating to 75 ℃, stirring at 500r/min for 30min, and cooling to room temperature;

b. adding 20 parts by weight of methyl methacrylate, 15 parts by weight of butyl acrylate, 5 parts by weight of acrylic acid, 0.2 part by weight of sodium dodecyl benzene sulfonate, 30.8 parts by weight of AEO-and 30 parts by weight of deionized water into the reaction kettle, starting mechanical stirring, stirring for 10 hours at a stirring speed of 400 r/min;

c. introducing nitrogen into a reaction kettle for protection, raising the temperature to 70 ℃, adding 0.4 weight part of sodium dodecyl benzene sulfonate and 31.6 weight parts of AEO-and then adding 0.25 weight part of ammonium persulfate, and continuously stirring at 400r/min for 5 hours to obtain the trans-1, 4-polyisoprene rubber modified acrylate emulsion.

The film-forming assistant is dipropylene glycol butyl ester;

the high-toughness polymer material is wood fiber;

the defoaming agent is an organic silicon defoaming agent;

the dispersant is sodium hexametaphosphate;

the preservative is isothiazolinone LXE;

the thickening agent is fumed silica.

The preparation method of the waterproof coating comprises the following steps:

1. adding deionized water into a stirring kettle, sequentially adding trans-1, 4-polyisoprene rubber modified acrylate emulsion, silicone-acrylic elastic emulsion, film forming auxiliary agent, dispersing agent, preservative and white color paste, starting a stirrer, stirring for 30min, wherein the rotating speed of the stirrer is 550 r/min;

2. under the condition of stirring, adding quartz sand, mica powder and a high-toughness polymer material into the slurry stirred in the step (1), and stirring for 30min at the rotating speed of 400 r/min;

3. adding a thickening agent into the stirred feed liquid in the step 2;

4. and (3) adding a defoaming agent into the mixed material liquid obtained in the step (2), stirring for 10min at the stirring speed of 150r/min, and thus obtaining the waterproof coating.

Example 3

The waterproof coating comprises the following raw materials: 50 parts of trans-1, 4-polyisoprene rubber modified acrylate emulsion, 10 parts of silicone-acrylic elastic emulsion, 3 parts of film-forming additive, 13 parts of high-toughness polymer material, 6 parts of quartz sand, 8 parts of mica powder, 0.2 part of defoaming agent, 0.8 part of dispersing agent, 0.2 part of preservative, 0.2 part of thickening agent, 0.1 part of white color paste and 8.5 parts of deionized water.

The trans-1, 4-polyisoprene rubber modified acrylate emulsion is prepared according to the following method:

1) the preparation method of the trans-1, 4-polyisoprene rubber latex comprises the following steps:

a. adding 4 parts by weight of trans-1, 4-polyisoprene rubber and 46 parts by weight of cyclohexane into a reaction kettle, starting a stirrer, controlling the rotating speed of the stirrer at 500r/min, controlling the temperature at 40 ℃, and stirring for 3 hours;

b. adding 1 part by weight of potassium oleate and 801 parts by weight of Span, adjusting the rotating speed to 1000r/min, adding 1 part by weight of 0.5mol/L potassium hydroxide solution and 47 parts by weight of deionized water in the stirring process, and continuously stirring for 30 min;

c. starting an emulsification switch, wherein the emulsification rotation speed is 4000r/min, and the emulsification time is 5min to obtain an emulsion;

d. and distilling the emulsion at 45 ℃ under reduced pressure to obtain the trans-1, 4-polyisoprene rubber latex.

2) The preparation method of the trans-1, 4-polyisoprene rubber modified acrylate emulsion comprises the following steps:

a. adding 20 parts by weight of trans-1, 4-polyisoprene rubber latex and 7 parts by weight of silane coupling agent VP151 into a reaction kettle, heating to 75 ℃, stirring at 500r/min for 30min, and cooling to room temperature;

b. adding 20 parts by weight of methyl methacrylate, 15 parts by weight of butyl acrylate, 5 parts by weight of acrylic acid, 0.2 part by weight of sodium dodecyl benzene sulfonate, 30.8 parts by weight of AEO-and 30 parts by weight of deionized water into the reaction kettle, starting mechanical stirring, stirring for 10 hours at a stirring speed of 400 r/min;

c. introducing nitrogen into a reaction kettle for protection, raising the temperature to 70 ℃, adding 0.4 weight part of sodium dodecyl benzene sulfonate and 31.6 weight parts of AEO-and then adding 0.25 weight part of ammonium persulfate, and continuously stirring at 400r/min for 5 hours to obtain the trans-1, 4-polyisoprene rubber modified acrylate emulsion.

The film-forming assistant is dipropylene glycol butyl ester;

the high-toughness polymer material is wood fiber;

the defoaming agent is an organic silicon defoaming agent;

the dispersant is sodium hexametaphosphate;

the preservative is isothiazolinone LXE;

the thickening agent is fumed silica.

The preparation method of the waterproof coating comprises the following steps:

1. adding deionized water into a stirring kettle, sequentially adding trans-1, 4-polyisoprene rubber modified acrylate emulsion, silicone-acrylic elastic emulsion, film forming auxiliary agent, dispersing agent, preservative and white color paste, starting a stirrer, stirring for 30min, wherein the rotating speed of the stirrer is 550 r/min;

2. under the condition of stirring, adding quartz sand, mica powder and a high-toughness polymer material into the slurry stirred in the step (1), and stirring for 30min at the rotating speed of 400 r/min;

3. adding a thickening agent into the stirred feed liquid in the step 2;

4. and (3) adding a defoaming agent into the mixed material liquid obtained in the step (2), stirring for 10min at the stirring speed of 150r/min, and thus obtaining the waterproof coating.

Example 4

The waterproof coating comprises the following raw materials: 55 parts of trans-1, 4-polyisoprene rubber modified acrylate emulsion, 5 parts of silicone-acrylic elastic emulsion, 3 parts of film-forming additive, 13 parts of high-toughness polymer material, 6 parts of quartz sand, 8 parts of mica powder, 0.2 part of defoaming agent, 0.8 part of dispersing agent, 0.2 part of preservative, 0.2 part of thickening agent, 0.1 part of white color paste and 8.5 parts of deionized water.

The trans-1, 4-polyisoprene rubber modified acrylate emulsion is prepared according to the following method:

1) the preparation method of the trans-1, 4-polyisoprene rubber latex comprises the following steps:

a. adding 4 parts by weight of trans-1, 4-polyisoprene rubber and 46 parts by weight of cyclohexane into a reaction kettle, starting a stirrer, controlling the rotating speed of the stirrer at 500r/min, controlling the temperature at 40 ℃, and stirring for 3 hours;

b. adding 1 part by weight of potassium oleate and 801 parts by weight of Span, adjusting the rotating speed to 1000r/min, adding 1 part by weight of 0.5mol/L potassium hydroxide solution and 47 parts by weight of deionized water in the stirring process, and continuously stirring for 30 min;

c. starting an emulsification switch, wherein the emulsification rotation speed is 4000r/min, and the emulsification time is 5min to obtain an emulsion;

d. and distilling the emulsion at 45 ℃ under reduced pressure to obtain the trans-1, 4-polyisoprene rubber latex.

2) The preparation method of the trans-1, 4-polyisoprene rubber modified acrylate emulsion comprises the following steps:

a. adding 20 parts by weight of trans-1, 4-polyisoprene rubber latex and 7 parts by weight of silane coupling agent VP151 into a reaction kettle, heating to 75 ℃, stirring at 500r/min for 30min, and cooling to room temperature;

b. adding 20 parts by weight of methyl methacrylate, 15 parts by weight of butyl acrylate, 5 parts by weight of acrylic acid, 0.2 part by weight of sodium dodecyl benzene sulfonate, 30.8 parts by weight of AEO-and 30 parts by weight of deionized water into the reaction kettle, starting mechanical stirring, stirring for 10 hours at a stirring speed of 400 r/min;

c. introducing nitrogen into a reaction kettle for protection, raising the temperature to 70 ℃, adding 0.4 weight part of sodium dodecyl benzene sulfonate and 31.6 weight parts of AEO-and then adding 0.25 weight part of ammonium persulfate, and continuously stirring at 400r/min for 5 hours to obtain the trans-1, 4-polyisoprene rubber modified acrylate emulsion.

The film-forming assistant is dipropylene glycol butyl ester;

the high-toughness polymer material is wood fiber;

the defoaming agent is an organic silicon defoaming agent;

the dispersant is sodium hexametaphosphate;

the preservative is isothiazolinone LXE;

the thickening agent is fumed silica.

The preparation method of the waterproof coating comprises the following steps:

1. adding deionized water into a stirring kettle, sequentially adding trans-1, 4-polyisoprene rubber modified acrylate emulsion, silicone-acrylic elastic emulsion, film forming auxiliary agent, dispersing agent, preservative and white color paste, starting a stirrer, stirring for 30min, wherein the rotating speed of the stirrer is 550 r/min;

2. under the condition of stirring, adding quartz sand, mica powder and a high-toughness polymer material into the slurry stirred in the step (1), and stirring for 30min at the rotating speed of 400 r/min;

3. adding a thickening agent into the stirred feed liquid in the step 2;

4. and (3) adding a defoaming agent into the mixed material liquid obtained in the step (2), stirring for 10min at the stirring speed of 150r/min, and thus obtaining the waterproof coating.

Example 5

The waterproof coating comprises the following raw materials: 60 parts of trans-1, 4-polyisoprene rubber modified acrylate emulsion, 5 parts of silicone-acrylic elastic emulsion, 3 parts of film-forming additive, 13 parts of high-toughness polymer material, 6 parts of quartz sand, 8 parts of mica powder, 0.2 part of defoaming agent, 0.8 part of dispersing agent, 0.2 part of preservative, 0.2 part of thickening agent, 0.1 part of white color paste and 13.5 parts of deionized water.

The trans-1, 4-polyisoprene rubber modified acrylate emulsion is prepared according to the following method:

1) the preparation method of the trans-1, 4-polyisoprene rubber latex comprises the following steps:

a. adding 4 parts by weight of trans-1, 4-polyisoprene rubber and 46 parts by weight of cyclohexane into a reaction kettle, starting a stirrer, controlling the rotating speed of the stirrer at 500r/min, controlling the temperature at 40 ℃, and stirring for 3 hours;

b. adding 1 part by weight of potassium oleate and 801 parts by weight of Span, adjusting the rotating speed to 1000r/min, adding 1 part by weight of 0.5mol/L potassium hydroxide solution and 47 parts by weight of deionized water in the stirring process, and continuously stirring for 30 min;

c. starting an emulsification switch, wherein the emulsification rotation speed is 4000r/min, and the emulsification time is 5min to obtain an emulsion;

d. and distilling the emulsion at 45 ℃ under reduced pressure to obtain the trans-1, 4-polyisoprene rubber latex.

2) The preparation method of the trans-1, 4-polyisoprene rubber modified acrylate emulsion comprises the following steps:

a. adding 20 parts by weight of trans-1, 4-polyisoprene rubber latex and 7 parts by weight of silane coupling agent VP151 into a reaction kettle, heating to 75 ℃, stirring at 500r/min for 30min, and cooling to room temperature;

b. adding 20 parts by weight of methyl methacrylate, 15 parts by weight of butyl acrylate, 5 parts by weight of acrylic acid, 0.2 part by weight of sodium dodecyl benzene sulfonate, 30.8 parts by weight of AEO-and 30 parts by weight of deionized water into the reaction kettle, starting mechanical stirring, stirring for 10 hours at a stirring speed of 400 r/min;

c. introducing nitrogen into a reaction kettle for protection, raising the temperature to 70 ℃, adding 0.4 weight part of sodium dodecyl benzene sulfonate and 31.6 weight parts of AEO-and then adding 0.25 weight part of ammonium persulfate, and continuously stirring at 400r/min for 5 hours to obtain the trans-1, 4-polyisoprene rubber modified acrylate emulsion.

The film-forming assistant is dipropylene glycol butyl ester;

the high-toughness polymer material is wood fiber;

the defoaming agent is an organic silicon defoaming agent;

the dispersant is sodium hexametaphosphate;

the preservative is isothiazolinone LXE;

the thickening agent is fumed silica.

The preparation method of the waterproof coating comprises the following steps:

1. adding deionized water into a stirring kettle, sequentially adding trans-1, 4-polyisoprene rubber modified acrylate emulsion, silicone-acrylic elastic emulsion, film forming auxiliary agent, dispersing agent, preservative and white color paste, starting a stirrer, stirring for 30min, wherein the rotating speed of the stirrer is 550 r/min;

2. under the condition of stirring, adding quartz sand, mica powder and a high-toughness polymer material into the slurry stirred in the step (1), and stirring for 30min at the rotating speed of 400 r/min;

3. adding a thickening agent into the stirred feed liquid in the step 2;

4. and (3) adding a defoaming agent into the mixed material liquid obtained in the step (2), stirring for 10min at the stirring speed of 150r/min, and thus obtaining the waterproof coating.

Comparative example 1

The waterproof coating comprises the following raw materials: 55 parts of silicone-acrylic elastic emulsion, 3 parts of film-forming additive, 12 parts of high-toughness polymer material, 20 parts of quartz sand, 10 parts of mica powder, 0.2 part of defoaming agent, 0.8 part of dispersing agent, 0.2 part of preservative, 0.2 part of thickening agent, 0.1 part of white color paste and 8.5 parts of deionized water.

The film-forming assistant is dipropylene glycol butyl ester;

the high-toughness polymer material is wood fiber;

the defoaming agent is an organic silicon defoaming agent;

the dispersant is sodium hexametaphosphate;

the preservative is isothiazolinone LXE;

the thickening agent is fumed silica.

The preparation method of the waterproof coating comprises the following steps:

1. adding deionized water into a stirring kettle, sequentially adding silicone-acrylic elastic emulsion, a film-forming auxiliary agent, a dispersing agent, a preservative and white color paste, starting a stirrer, stirring for 30min, wherein the rotating speed of the stirrer is 550 r/min;

2. under the condition of stirring, adding quartz sand, mica powder and a high-toughness polymer material into the slurry stirred in the step (1), and stirring for 30min at the rotating speed of 400 r/min;

3. adding a thickening agent into the stirred feed liquid in the step 2;

4. and (3) adding a defoaming agent into the mixed material liquid obtained in the step (2), stirring for 10min at the stirring speed of 150r/min, and thus obtaining the waterproof coating.

The performance of the waterproof coatings prepared in examples 1 to 5 and comparative example 1 was measured, and the results are shown in table 1.

TABLE 1 results of performance test of waterproof coatings prepared in examples 1 to 5 and comparative example 1

The experimental result shows that according to GB/T16777 and 2008, the tensile strength of the waterproof coating is not lower than 3.3MPa, and after the waterproof coating is treated for 30min under the condition of 0.3MPa, the waterproof coating is impermeable; the water resistance of the waterproof coating is detected according to the standard GB/T9755-2014, and no foaming or falling is caused after 144 hours; the dynamic cracking resistance of the waterproof coating is detected according to the standard JG/T157-2004, and when the base layer crack is larger than 0.7mm, the coating layer has no crack and the dynamic cracking resistance is better.

The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.