WO2018201932A1

WO2018201932A1 - Coating material and waterproof material

Info

Publication number: WO2018201932A1
Application number: PCT/CN2018/084240
Authority: WO
Inventors: 徐恩顺; 熊玉钦; 段文锋
Original assignee: 北京东方雨虹防水技术股份有限公司
Priority date: 2017-05-03
Filing date: 2018-04-24
Publication date: 2018-11-08
Also published as: CN107141931A

Abstract

A coating material, comprising the following components in parts by mass: 10-50 parts of an acrylate emulsion, 1-30 parts of an accelerator, and 20-70 parts of a filler; the accelerator comprises any one or a mixture of several selected from among aluminate, meta aluminate and a silicate; the acrylate emulsion is an anionic emulsion having a pH greater than 7. A waterproof material, the waterproof material comprises a waterproof main body layer (10), an adhesive layer (20) and a protective coating layer (30), which are laminated sequentially; the protective coating layer (30) is formed by means of curing the coating material.

Description

Coatings and waterproof materials

Technical field

The present invention relates to the field of building materials, and in particular to a coating material and a waterproof material comprising a protective coating made of the coating material.

Background technique

In the construction process of subway tunnels, highway tunnels and underground pipe corridors, anti-adhesive waterproof materials need to be pre-packed.

When pre-laying anti-adhesive waterproof material, it is generally constructed by air-laid method. The waterproof material is laid in the waterproof part in advance, then the steel bar is tied and the concrete is poured. After the concrete is hydrated, the protective layer is combined with the waterproof layer and the adhesive layer. The poured concrete forms a permanent bonding layer that achieves skin-type waterproofing.

However, the bonding strength between the current waterproof material and the post-cast concrete is not ideal.

Summary of the invention

As an aspect of the invention, there is provided a coating material and a waterproof material comprising a protective coating formed of the coating material. The protective coating has a high bonding strength with the post-cast concrete.

In order to achieve the above object, as one aspect of the invention, there is provided a coating, wherein the coating comprises the following parts by mass:

Acrylate emulsion: 10 to 50 parts;

Accelerator: 1 to 30 parts;

Filler: 20 to 70 parts, of which

The accelerator comprises a mixture of any one or any of an aluminate, a metaaluminate, a silicate, the acrylate emulsion being an anionic emulsion having a pH greater than 7.

Preferably, the accelerator is contained in the coating in an amount of from 1 to 5 parts by mass.

Preferably, the coating further comprises the following parts by mass:

Dispersing agent: 0.1 to 5 parts;

Wetting agent: 0.1 to 5 parts;

Defoamer: 0.5 to 5 parts;

Leveling agent: 0.1 to 5 parts;

Thickener: 0.1 to 5 parts;

Water: 10 to 40 parts.

Preferably, the dispersing agent comprises sodium polyacrylate and/or ammonium polyacrylate.

Preferably, the wetting agent comprises any one of alkylphenol ethoxylates, alkyl sulfates, sulfonates or a mixture of any of them.

Preferably, the antifoaming agent includes any one of a mineral oil type antifoaming agent, a silicone type antifoaming agent, and a paraffin type defoaming agent, or a mixture of any of them.

Preferably, the leveling agent comprises one or a mixture of any of a pure acrylic leveling agent, a modified acrylic leveling agent, a silicone leveling agent.

Preferably, the thickening agent comprises any one of bentonite, cellulose ether, polyacrylamide or a mixture of any of them.

Preferably, the coating further comprises 0.1 to 1 part by mass of an ultraviolet absorber.

Preferably, the ultraviolet absorber comprises a salicylate ultraviolet absorber, a benzophenone ultraviolet absorber, a benzotriazole ultraviolet absorber, a substituted acrylonitrile ultraviolet absorber, a triazine ultraviolet absorber, and a hindered agent. Any one or a mixture of any of the amine ultraviolet absorbers.

Preferably, the acrylate emulsion comprises any one or a mixture of any of a acetoacetate emulsion, a styrene-acrylic emulsion, a pure acrylic emulsion, a silicone-acrylic emulsion, and a carbonate emulsion.

Preferably, the coating further comprises 0.1 to 0.5 parts by mass of a preservative.

As another aspect of the present invention, a waterproof material is provided, wherein the waterproof material comprises a waterproof main body layer, an adhesive layer, and a protective coating layer which are sequentially laminated, and the protective coating layer is cured by the above-described paint provided by the present invention. The adhesive layer bonds the protective coating to the waterproof body layer.

Preferably, the material from which the waterproof body layer is made includes any one of HDPE, EVA, PVC, and EPDM.

In the protective coating obtained by curing the coating, the accelerator is a crystal concentrated on the surface of the protective coating. When pouring concrete, since the concrete contains a large amount of water, the quick-setting agent on the surface of the protective coating dissolves and reacts with the gypsum in the concrete to prevent the formation of ettringite on the surface of the cement particles, thereby promoting the hydration of the cement, thereby making the concrete Rapid hydration and hardening achieve the purpose of rapid bonding of the waterproof material and the post-cast concrete, thereby improving the bonding strength between the waterproof material and the post-cast concrete, and enhancing the waterproof effect.

DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a In the drawing:

Fig. 1 is a schematic view showing the structure of the waterproof material.

Description of the reference numerals

10: waterproof body layer 20: adhesive layer

30: protective coating

detailed description

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative and not restrictive.

As an aspect of the invention, there is provided a coating characterized in that the coating comprises the following parts by mass:

Acrylate emulsion: 10 to 50 parts;

Accelerator: 1 to 30 parts;

Filler: 20 to 70 parts, of which

The accelerator is selected from any one or a mixture of an aluminate, a metaaluminate, a silicate, and the acrylate emulsion is an anionic emulsion having a pH greater than 7.

Further preferably, the accelerator may be a silicate and/or a metaaluminate. When selecting a accelerator, an emulsion that has good compatibility with the acrylate emulsion should be selected.

In the coating, the acrylate emulsion and the filler are the main body, and after the acrylate emulsion is cured, the coating can be formed into a continuous film. Acrylate emulsions can be counter-bonded to concrete.

The film formed by the coating is used as a protective coating for the waterproof material. Specifically, as shown in FIG. 1, the waterproof material includes a waterproof body layer 10, an adhesive layer 20, and a protective coating 30. In the production of the waterproof material, the coating is applied to the adhesive layer 20 and then cured to obtain the protective coating 30.

In the protective coating 30 obtained by curing the coating, the accelerator is a crystal concentrated on the surface of the protective coating 30. When concrete is poured, since the concrete contains a large amount of water, the quick-setting agent on the surface of the protective coating 30 dissolves and reacts with the gypsum in the concrete to prevent the formation of ettringite on the surface of the cement particles, thereby promoting cement hydration, thereby The tricalcium silicate and the tricalcium aluminate in the concrete are rapidly hydrated and hardened to achieve the purpose of fast bonding of the waterproof material and the post-cast concrete, thereby improving the bonding strength between the waterproof material and the post-cast concrete, and enhancing Waterproof effect.

Since the acrylate emulsion selected in the coating is an anionic emulsion having a pH greater than 7, the hydrogen ion content of the coating is small and does not cause the accelerator to react with hydrogen ions to form a precipitate. Therefore, the emulsion emulsion does not cause demulsification during the mixing with the quick-setting admixture, and a stable suspension can be obtained, thereby ensuring that the quick-setting agent can be concentrated after the coating is dried and formed into a film. In the vicinity of the upper surface of the membrane, the content of the quick-setting agent in the vicinity of the upper surface can be ensured for the purpose of rapid gelation of the hydrogel.

In the present invention, the specific composition of the filler is not particularly limited, and for example, the filler may be selected from any one or a mixture of any of calcium carbonate, light calcium carbonate, titanium white powder, kaolin, and wollastonite. The fillers are all commercially available and will not be described again.

Likewise, there are no special requirements for the specific ingredients of the accelerator. For example, the specific component of the aluminate accelerator may be sodium aluminate, the specific component of the metaaluminate may be sodium metaaluminate, and the specific component of the silicate may be sodium silicate.

Since the coating does not add components such as fine sand, gravel, etc., the filler and the accelerator are well bonded by the acrylate emulsion, and when the coating is cured to form a protective film layer, a continuous coating is formed, and There is no granule which is easy to fall off, and therefore, the protective film layer formed by the coating is stable in nature and convenient for transportation. Since there is no problem of particle shedding, when the concrete is poured, the construction is convenient, and the property of the protective film layer formed by the coating does not change, and can be firmly combined with the post-cast concrete, thereby improving the The strength of the bond.

It is to be noted that, in addition to the above three components, the total mass part of the coating is 100 parts regardless of whether the coating includes other components.

By setting the mass fraction of the acrylate emulsion between 10 and 50 parts, it is possible to obtain both a continuous film and a bond with concrete without cracking of the film layer. By setting the mass fraction of the accelerator to between 1 and 30 parts, it is possible to control both the total cost of the coating and the material-stable coating. Setting the filler between 20 and 70 parts allows the coating to have a higher viscosity.

Preferably, the coating has a solids content of between 50% and 80%.

In order to improve the uniformity of the coating and the film forming property, preferably, the coating further comprises the following parts by mass:

Dispersing agent: 0.1 to 5 parts;

Wetting agent: 0.1 to 5 parts;

Defoamer: 0.5 to 5 parts;

Leveling agent: 0.1 to 5 parts;

Thickener: 0.1 to 5 parts;

Water: 10 to 40 parts.

The main role of water is dispersion. Since high-speed stirring is required after the components are mixed together in the preparation of the coating. The emulsification of the acrylate emulsion can be prevented by adding water. The water may be any one of deionized water, purified water, distilled water, and low-hardness tap water.

Dispersants, wetting agents, defoamers, leveling agents, thickeners should have good compatibility with the acrylate emulsion.

The dispersing agent may be selected from sodium polyacrylate and/or ammonium polyacrylate. For example, the dispersing agent can be any one of DP270, DA40, and 5040, or a mixture of any of them.

The wetting agent may be selected from any one or a mixture of alkylphenol ethoxylates, alkyl sulfates, sulfonates. The above wetting agent can surface modify the filler to obtain a more stable and more dispersed suspension.

The antifoaming agent may be selected from any one of mineral oil, silicone, and paraffin, or a mixture of any of them. For example, the antifoaming agent may be any one or any of 7010, NXZ, and F-111.

The leveling agent can effectively reduce the surface tension of the coating, and promote the formation of a smooth, smooth and uniform film during the drying process. The leveling agent is selected from any one or any of a pure acrylic leveling agent, a modified acrylic leveling agent, and a silicone leveling agent. For example, the leveling agent may be any one of ASE-60, Polyflow S, No. 90, and KL-700.

The thickener is a rheological additive that not only thickens the coating, prevents sagging during construction, but also imparts excellent mechanical properties and storage stability to the coating. The thickener may be selected from any one of bentonite, cellulose ether, polyacrylamide or a mixture of any of them.

Since the protective coating obtained by the coating is provided on the adhesive layer, preferably, the coating further includes 0.1 to 1 part by mass of the ultraviolet absorbent.

After the ultraviolet absorber is disposed in the coating, the coating is applied over the adhesive layer disposed on the waterproof body layer to form a protective coating. The ultraviolet absorber in the protective coating can absorb ultraviolet light irradiated on the surface of the protective coating to prevent ultraviolet rays from being irradiated to the adhesive layer, thereby preventing the protective coating from falling off from the waterproof body.

As described above, the acrylate emulsion should be an alkaline emulsion containing an anion. In order to prevent reaction with the accelerator, preferably, the anion in the acrylate emulsion may include a carboxylate, a sulfonate, a sulfate salt, and Phosphate salt. Also, preferably, the concentration of the anion in the acrylic emulsion may be from 0.1 part by mass to 1.0 part by mass. In order to achieve the above requirements, preferably, the acrylate emulsion comprises any one or a mixture of any one of a acetoacetate emulsion, a styrene-acrylic emulsion, a pure acrylic emulsion, a silicone-acrylic emulsion, and a carbonate emulsion.

In order to prevent microbial growth, and to extend the shelf life of the coating, preferably, the coating may further comprise 0.1 to 5.0 parts by mass of a preservative. Preferably, the preservative may be selected from any one of Sol RS, Sol MV, and Lonza Proxel CMC.

The preparation method of the coating is described below, and the preparation method comprises the following steps:

In step S100, weigh the required mass of water into the dispersion tank;

In step S200, the dispersing agent, the wetting agent and the antifoaming agent are weighed, added to the dispersing tank, stirred at 100 rpm for 2 to 3 minutes, and stirred uniformly; then the stirring speed is increased to 200 rpm, slowly and evenly. Add the weighed filler, add in 10~15 minutes, stir evenly until the fineness is less than 50μm;

In step S300, the acrylate emulsion is weighed, slowly and evenly added to the dispersion tank, and the mixture is added in 5-8 minutes, dispersed at 200 rpm for 4 to 5 minutes, and stirred uniformly; then the leveling agent and thickener are weighed. , accelerator, UV absorber, preservative, added to the dispersion tank, dispersed at 200 rev / min for 4 to 5 minutes, stirring evenly.

The product which is uniformly stirred in step S300 is the coating material, and the filling can be performed by weighing.

As another aspect of the present invention, there is provided a waterproof material, wherein, as shown in FIG. 1, the waterproof material comprises a waterproof main body layer 10, an adhesive layer 20, and a protective coating 30 which are sequentially laminated, the protective coating 30 is made of the above coating provided by the present invention, and the adhesive layer 20 bonds the protective coating 30 to the waterproof body layer 10.

As described above, at the time of construction, the waterproof material is laid at a position where waterproofing is required, and the protective coating 30 is disposed outward. Concrete is then poured onto the protective coating 30.

The concrete contains a large amount of water, dissolves the quick-setting agent on the surface of the protective coating 30, dissolves the quick-setting agent and reacts with the gypsum in the concrete, prevents the formation of ettringite on the surface of the cement particles, and promotes hydration of the cement, thereby The concrete is quickly hydrated and hardened to achieve the purpose of quickly bonding the waterproof material to the post-cast concrete.

The adhesive layer 20 may be an adhesive layer formed of a hot melt adhesive. When the waterproof material is prepared, a hot melt adhesive is first applied to the surface of the waterproof body layer 10 to form the adhesive layer 20, and then The coating is applied to the adhesive layer 20. After the coating is cured, a protective coating 30 is formed which, as described above, has crystals of a quick setting agent on the surface of the protective coating 30.

In the present invention, the specific material of the waterproof body layer is not particularly limited. For example, the material for forming the waterproof body layer includes any one of HDPE, EVA, PVC, and EPDM.

For ease of transportation, preferably, the waterproof material may be wound on a rotating shaft and sold and transported in the form of a coil.

When the waterproof material is used, the waterproof material may be laid in a portion where it is required to be waterproofed by means of pre-laying or wet-laying.

Since the cross section of the waterproof material and the post-cast concrete can be quickly dried, the waterproof material has good bonding strength with the portion formed by the post-cast concrete, and the waterproof material is not easily formed with the post-cast concrete. Partial separation allows for improved water resistance and structural stability of the building.

The adhesive layer may be a layer made of a hot melt pressure sensitive adhesive. Correspondingly, the preparation method of the waterproof material may include:

In step S110, the hot-melt adhesive in a molten state is applied onto the waterproof main body layer to obtain an adhesive layer, and at this time, the temperature of the hot melt adhesive is between 120 ° C and 150 ° C;

In step S120, after the adhesive layer is cooled to between 70 ° C and 80 ° C, the coating is applied to the adhesive layer;

In step S130, the coating layer is cured to obtain the protective coating, and finally the waterproof material is obtained.

In step S130, the coating may be applied to the surface of the hot melt adhesive layer by brushing or spraying, and then dried in a hot air oven at about 90 °C.

In the present invention, the thickness of the adhesive layer, the thickness of the waterproof main layer, and the thickness of the protective coating all satisfy the requirements in GB/T 23457-2009 "Pre-Pipe/Wet-Pave Waterproof Coil".

Examples 1-3

The coating was prepared as follows:

In step S100, weigh the required mass parts of deionized water into the dispersion tank;

In step S200, the desired mass parts of the dispersant, the wetting agent and the antifoaming agent are respectively weighed, added to the dispersion tank, stirred at 100 rpm for 2 to 3 minutes, and stirred uniformly; then the stirring speed is increased to 200 rpm. /min, slowly and evenly added the weighed filler, added within 10 to 15 minutes, stir evenly to a fineness of less than 50μm;

In step S300, the acrylate emulsion is weighed, slowly and evenly added to the dispersion tank, and the mixture is added in 5-8 minutes, dispersed at 200 rpm for 4 to 5 minutes, and stirred uniformly; then the leveling agent and thickener are weighed. , a quick-setting admixture, an ultraviolet absorber, a preservative, added to the dispersion cylinder, dispersed at a speed of 200 rpm for 4 to 5 minutes, and stirred uniformly to obtain the coating.

It is to be noted that in the following Examples 1 to 3, the mass of one part was 250 g.

Example 1

The coating is prepared according to the above preparation method, and the specific categories and specific weights of the respective components in the coating are as shown in Table 1:

Table 1

组分名称Component name	具体类别Specific category	重量weight
水water	去离子水Deionized water	250g250g
丙烯酸酯乳液Acrylate emulsion	罗门哈斯AC-261PRohm and Haas AC-261P	350g350g
填料filler	重钙江西广源CC1000Heavy calcium Jiangxi Guangyuan CC1000	300g300g
紫外吸收剂Ultraviolet absorber	汽巴紫外线吸收剂326Ciba UV absorber 326	10g10g
铝酸钠Sodium aluminate	淄博阳曼化工Zibo Yangman Chemical	50g50g
分散剂Dispersant	DP270DP270	10g10g
润湿剂moisturizer	CF10CF10	5g5g
消泡剂Defoamer	NXZNXZ	5g5g
流平剂Leveling agent	ASE-60ASE-60	5g5g
增稠剂Thickener	RM-8WRM-8W	10g10g
防腐剂preservative	MVMV	5g5g

Example 2

The coating is prepared according to the above preparation method, and the specific categories and specific weights of the respective components in the coating are as shown in Table 2:

Table 2

组分名称Component name	具体类别Specific category	重量weight
水water	去离子水Deionized water	200g200g
丙烯酸酯乳液Acrylate emulsion	罗门哈斯AC-261PRohm and Haas AC-261P	350g350g
填料filler	重钙江西广源CC800Heavy calcium Jiangxi Guangyuan CC800	360g360g
紫外吸收剂Ultraviolet absorber	汽巴紫外线吸收剂326Ciba UV absorber 326	10g10g
偏铝酸钠Sodium metaaluminate	淄博阳曼化工Zibo Yangman Chemical	30g30g
分散剂Dispersant	诺普科5040Nopco 5040	15g15g
润湿剂moisturizer	NP10NP10	5g5g
消泡剂Defoamer	诺普科NXZNopko NXZ	10g10g
流平剂Leveling agent	ASE-60ASE-60	5g5g

增稠剂Thickener	RM-8WRM-8W	10g10g
防腐剂preservative	MVMV	5g5g

Example 3

The coating is prepared according to the above preparation method, and the specific categories and specific weights of the respective components in the coating are as shown in Table 3:

table 3

组分名称Component name	具体类别Specific category	重量weight
水water	去离子水Deionized water	150g150g
丙烯酸酯乳液Acrylate emulsion	罗门哈斯AC-261PRohm and Haas AC-261P	300g300g
填料filler	重钙江西广源CC800Heavy calcium Jiangxi Guangyuan CC800	420g420g
紫外吸收剂Ultraviolet absorber	汽巴紫外线吸收剂326Ciba UV absorber 326	20g20g
硅酸钠Sodium silicate	天津渤海化工Tianjin Bohai Chemical	70g70g
分散剂Dispersant	诺普科5040Nopco 5040	5g5g
润湿剂moisturizer	CF10CF10	5g5g
消泡剂Defoamer	诺普科NXZNopko NXZ	10g10g
流平剂Leveling agent	ASE-60ASE-60	5g5g
增稠剂Thickener	RM-8WRM-8W	10g10g
防腐剂preservative	MVMV	5g5g

Comparative example 1-3

The coating materials of Comparative Examples 1 to 3 were prepared in the same manner as in the examples.

Comparative example 1

The coating material in Comparative Example 1 was different from the coating material in Example 1 in that the coating material in Comparative Example 1 was not added with a accelerator.

Comparative example 2

The coating material of Comparative Example 2 was different from the coating material of Example 2 in that the coating material in Comparative Example 2 was not added with a accelerator.

Comparative example 3

The coating material in Comparative Example 3 was different from the coating material in Example 3 in that the coating material in Comparative Example 3 was not added with a accelerator.

Experimental example

The waterproof material was prepared as follows:

The peel strength of the waterproof material 48h and the post-cast concrete was tested according to the method in GB/T 23457-2009, and the test results are shown in Table 4.

Table 4

It is to be understood that the above embodiments are merely exemplary embodiments employed to explain the principles of the invention, but the invention is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the invention. These modifications and improvements are also considered to be within the scope of the invention.

Claims

A coating characterized in that the coating comprises the following parts by mass:

Acrylate emulsion: 10 to 50 parts;

Accelerator: 1 to 30 parts;

Filler: 20 to 70 parts, of which

The accelerator comprises a mixture of any one or any of an aluminate, a metaaluminate, a silicate, the acrylate emulsion being an anionic emulsion having a pH greater than 7.
The paint according to claim 1, wherein the accelerator is contained in the coating in an amount of from 1 to 5 parts by mass.
The coating according to claim 1 or 2, wherein the coating further comprises the following parts by mass:

Dispersing agent: 0.1 to 5 parts;

Wetting agent: 0.1 to 5 parts;

Defoamer: 0.5 to 5 parts;

Leveling agent: 0.1 to 5 parts;

Thickener: 0.1 to 5 parts;

Water: 10 to 40 parts.
The coating according to claim 3, characterized in that the dispersing agent comprises sodium polyacrylate and/or ammonium polyacrylate.
The coating according to claim 3, wherein the wetting agent comprises any one or a mixture of alkylphenol ethoxylates, alkyl sulfates, sulfonates.
The paint according to claim 3, wherein the antifoaming agent comprises any one or a mixture of a mineral oil type antifoaming agent, a silicone type antifoaming agent, and a paraffin type defoaming agent.
The paint according to claim 3, wherein the leveling agent comprises one or a mixture of a pure acrylic leveling agent, a modified acrylic leveling agent, a silicone leveling agent .
The coating according to claim 3, wherein the thickening agent comprises any one or a mixture of bentonite, cellulose ether, polyacrylamide.
The paint according to claim 3, wherein the paint further comprises 0.1 to 1 part by mass of the ultraviolet absorber.
The paint according to claim 9, wherein the ultraviolet absorber comprises a salicylate ultraviolet absorber, a benzophenone ultraviolet absorber, a benzotriazole ultraviolet absorber, and a substituted acrylonitrile ultraviolet absorber. Any one or a mixture of any one of a dose, a triazine-based ultraviolet absorber, and a hindered amine-based ultraviolet absorber.
The coating according to any one of claims 1 to 10, wherein the acrylate emulsion comprises any one of a acetoacetate emulsion, a styrene-acrylic emulsion, a pure acrylic emulsion, a silicone-acrylic emulsion, and a carbonate emulsion, or a mixture of any of several.
The paint according to any one of claims 1 to 10, characterized in that the paint further comprises 0.1 to 0.5 part by mass of a preservative.
A waterproof material, comprising: a waterproof main body layer, an adhesive layer, and a protective coating layer, which are sequentially laminated, the protective coating being cured by the coating according to any one of claims 1 to 12. The adhesive layer bonds the protective coating to the waterproof body layer.
The waterproof material according to claim 13, wherein the material for forming the waterproof main body layer comprises any one of HDPE, EVA, PVC, and EPDM.