A high-viscosity and anti-slip rubber asphalt waterproof coating and preparation method thereof

Abstract

The invention discloses a high-viscosity anti-skid rubber asphalt waterproof coating and a preparation method thereof, wherein the high-viscosity anti-skid rubber asphalt waterproof coating comprises asphalt, styrene-butadiene latex, modified epoxy resin emulsion, tackifier, defoamer and filler; the modified epoxy resin emulsion comprises modified epoxy resin, emulsifier and water; the modified epoxy resin is prepared by reacting 2-hydroxy-1-naphthaldehyde, allyl bromide and phenolic epoxy acrylate. The high-viscosity anti-skid rubber asphalt waterproof coating provided by the invention has excellent bonding ability and mechanical strength, can improve the bonding effect and stability of waterproof coating and material, and then achieve the anti-skid effect, and can improve the high temperature resistance of waterproof coating, extend its service life and expand its application range, so that it can be widely used in the field of waterproof coating.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof coatings, and in particular to a high-viscosity and anti-slip rubber asphalt waterproof coating and a preparation method thereof. Background Art

[0002] With the continuous improvement of people's living standards, people have put forward higher requirements on the quality of construction projects and their waterproofing and leak prevention. Roof leakage has become a difficult problem that needs to be solved urgently, especially in the construction joints of the wall, stair platform steps or wall pipes. In addition to reasons such as waterproof design and waterproof construction, more of it is the sinking of backfill soil caused by brutal backfilling. The lateral friction tears the weakly bonded waterproof layer and destroys the integrity of the waterproofing. Therefore, it is necessary to use building waterproof materials to reinforce the wall.

[0003] Building waterproof materials refer to materials that prevent rainwater, groundwater, water supply and drainage, corrosive liquids, and moisture and steam in the air from invading buildings. The parts of buildings that need waterproofing are mainly roofs, walls, floors and basements, and are mainly constructed through coating, spreading, filling, pouring, bonding and other processes. The development of domestic waterproof materials has basically formed an industrial system with relatively complete categories and relatively complete production and application technologies. The types include five major categories of products: modified asphalt membranes, polymer waterproof membranes, waterproof coatings, sealing materials, plugging materials and rigid waterproof materials.

[0004] Among them, asphalt waterproof coating is a solvent-based or water-emulsion waterproof coating with asphalt as the base material. Solvent-based asphalt waterproof coating refers to the unmodified petroleum asphalt directly dissolved in gasoline and other solvents. Water-emulsion asphalt waterproof coating refers to the petroleum asphalt dispersed in water under the action of chemical emulsifiers or mineral emulsifiers to form a stable aqueous dispersion. Emulsified asphalt waterproof coating has a short service life and poor crack resistance, low-temperature flexibility and heat resistance. It is suitable for the construction of industrial and civil building roofs, toilet and bathroom waterproof layers and underground moisture-proof and anti-corrosion coatings. It is a cheap and low-grade waterproof coating.

[0005] Asphalt is a brown or dark brown organic cementitious material and is an indispensable material in civil engineering construction. It is widely used in construction, roads, bridges and other projects. Commonly used asphalt modifiers are divided into polymer modification and inorganic modification. Polymer modifiers include SBS, SBR, PE, EVA, etc., and inorganic modified materials include diatomaceous earth, etc. However, the bonding ability and mechanical strength of polymer modified asphalt waterproof coatings in the prior art are still insufficient, resulting in the inability to achieve full adhesion between the waterproof coating and the base surface and easy slippage after coating, and insufficient high temperature resistance, limited service life and application range.

[0006] Therefore, there is an urgent need for a rubber asphalt waterproof coating that has excellent bonding ability and mechanical strength, can achieve anti-slip properties, and has strong high temperature resistance. Summary of the invention

[0007] The purpose of the present invention is to provide a high-viscosity anti-slip rubber asphalt waterproof coating with excellent bonding ability and mechanical strength, which can achieve anti-slip and has strong high temperature resistance, so as to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: On the one hand, the present invention provides a high-viscosity anti-slip rubber asphalt waterproof coating, comprising asphalt, styrene-butadiene latex, modified epoxy resin emulsion, tackifier, defoamer and filler;

[0009] The modified epoxy resin emulsion comprises a modified epoxy resin, an emulsifier and water;

[0010] The modified epoxy resin is prepared by reacting 2-hydroxy-1-naphthaldehyde, allyl bromide and phenolic epoxy acrylate.

[0011] The present invention simultaneously modifies the asphalt material by using styrene-butadiene latex and modified epoxy resin emulsion. Based on the different structures and sizes between the molecules of the two, the performance of the asphalt material can be improved from multiple levels and the action range of the asphalt material between the molecules can be expanded, thereby increasing the contact area and action strength between the waterproof coating and the substrate, and improving the bonding ability and overall performance of the waterproof coating.

[0012] Furthermore, the modified epoxy resin is prepared by the following steps:

[0013] (1) adding allyl bromide, 2-hydroxy-1-naphthaldehyde, sodium hydroxide and a solvent into a reactor, heating to 40-50° C. for reaction for 2-3 hours, adding an organic peracid, adjusting the temperature to 0-10° C. for reaction for 3-4 hours, filtering, washing and drying to obtain an epoxy naphthalene ring intermediate;

[0014] (2) In a reactor, add phenolic epoxy acrylate, epoxy naphthalene intermediate, catalyst and solvent, heat to 70-75° C., react for 4-6 hours, filter, wash and dry to obtain the modified epoxy resin.

[0015] Furthermore, the epoxy naphthalene ring intermediate has a structure as shown in the following formula B:

[0016]

[0017] The modified epoxy resin emulsion containing a naphthalene ring structure is added in the present invention. On the one hand, the stability of the epoxy resin in the molecular structure can be enhanced by grafting the rigid naphthalene ring structure, and the mechanical strength and the ability to resist deformation can be improved, so that the prepared waterproof coating can be stably compounded on the surface of the substrate, and it is not easy to slip even in the case of high weight. On the other hand, based on the stacking effect formed by the interaction between the naphthalene ring molecular structures, the activity of the molecular chain can be further restricted, the expansion coefficient of the modified epoxy resin when heated can be reduced, and the thermal stability can be improved, so as to enhance the high temperature resistance of the waterproof coating.

[0018] Furthermore, in the step (1), the organic peracid is selected from one of peracetic acid, perbenzoic acid or m-chloroperbenzoic acid; and the molar ratio of allyl bromide, 2-hydroxy-1-naphthaldehyde and the organic peracid is (1.5-2): (1-1.2): (0.1-0.2).

[0019] Furthermore, in the step (2), the catalyst is selected from one of aluminum chloride, boron trifluoride or ferric bromide; and the mass ratio of the phenolic epoxy acrylate to the epoxy naphthalene ring intermediate is 1.5-2:1.

[0020] Furthermore, the modified epoxy resin emulsion is prepared by the following steps: grinding the modified epoxy resin to 10-100 nm, adding an emulsifier and water, heating to 40-50° C. and shearing to obtain the modified epoxy resin emulsion.

[0021] Furthermore, the mass ratio of the modified epoxy resin, emulsifier and water is (3-4): (2-2.5): (10-15).

[0022] Furthermore, the emulsifier is selected from one of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether or fatty acid polyoxyethylene ester.

[0023] Furthermore, the viscosity enhancer is selected from at least one of starch, carboxymethyl cellulose or sodium polyacrylate; the defoamer is selected from at least one of emulsified silicone oil, polydimethylsiloxane or polyoxyethylene polyoxypropanolamine ether; and the filler is selected from at least one of talc, calcium carbonate or kaolin.

[0024] Furthermore, based on a total mass fraction of 100%, the high-viscosity anti-slip rubber asphalt waterproof coating comprises:

[0025]

[0026] The balance is filler.

[0027] On the other hand, the present invention also provides a method for preparing a high-viscosity anti-slip rubber asphalt waterproof coating, comprising the following steps:

[0028] (1) mixing styrene-butadiene latex, modified epoxy resin emulsion, defoamer and filler uniformly to obtain a primary mixture;

[0029] (2) mixing the primary mixed material of step (1) with asphalt and grinding the mixture to obtain a mixed material;

[0030] (3) adding a tackifier to the mixture of step (2) and mixing the mixture evenly to obtain the high-viscosity and anti-slip rubber asphalt waterproof coating.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] (1) The high-viscosity and anti-skid rubber asphalt waterproof coating provided by the present invention uses a combination of styrene-butadiene latex and modified epoxy resin emulsion and is reasonably equipped with a tackifier, a defoamer and a filler, so that the prepared rubber asphalt waterproof coating has excellent bonding ability and mechanical strength, can improve the bonding effect and stability between the waterproof coating and the material, thereby achieving an anti-skid effect, and can improve the high temperature resistance of the waterproof coating, extend its service life and expand its application range, so that it can be widely used in the field of waterproof coatings.

[0033] (2) The high-viscosity and anti-slip rubber asphalt waterproof coating provided by the present invention is added with a modified epoxy resin emulsion containing a naphthalene ring structure. On the one hand, by grafting a rigid naphthalene ring structure, the stability of the epoxy resin in the molecular structure can be enhanced, and the mechanical strength and deformation resistance can be improved, so that the prepared waterproof coating can be firmly compounded on the surface of the substrate, and it is not easy to slip even under high weight. On the other hand, based on the stacking effect formed by the interaction between the naphthalene ring molecular structures, the activity of the molecular chain can be further constrained, the expansion coefficient of the modified epoxy resin when heated can be reduced, and the thermal stability can be improved, thereby enhancing the high temperature resistance of the waterproof coating.

[0034] (3) In the high-viscosity and anti-slip rubber asphalt waterproof coating provided by the present invention, due to the different structures and sizes between the molecules of styrene-butadiene latex and modified epoxy resin emulsion, the performance of the asphalt material can be improved from multiple levels and the range of action of the asphalt material between molecules can be expanded, thereby increasing the contact area and action strength between the waterproof coating and the substrate, and improving the bonding ability and overall performance of the waterproof coating.

[0035] (4) In the high-viscosity and anti-slip rubber asphalt waterproof coating provided by the present invention, the bonding ability and overall performance of the waterproof coating can be further improved by reasonably adding and blending thickeners, defoaming agents and fillers. DETAILED DESCRIPTION

[0036] The present invention will be described below in conjunction with specific embodiments. It should be noted that the following embodiments are examples of the present invention and are only used to illustrate the present invention, but not to limit the present invention. Other combinations and various modifications within the concept of the present invention may be performed without departing from the spirit or scope of the present invention.

[0037] Commercially available rubber asphalt waterproof coating was purchased from Shandong Yade Waterproof Materials Co., Ltd. The non-cured rubber asphalt waterproof coating was purchased; phenolic epoxy acrylate was purchased from Zhongshan Ketian Electronic Materials Co., Ltd.; the asphalt was 90# asphalt; AEO-9 was purchased from Jinan Qihang Chemical Technology Co., Ltd.; styrene-butadiene latex was purchased from Shandong AVIC Technology Service Co., Ltd., with the brand name ASDFWEAGFA; emulsified silicone oil was purchased from Henan Tianchou Chemical Products Co., Ltd.; sodium polyacrylate was purchased from Henan Keshan Biotechnology Co., Ltd., with the item number 98998; polydimethylsiloxane was purchased from Jinan Shanhai Chemical Technology Co., Ltd., with the CAS number 9006-65-9; polyoxyethylene polyoxypropanolamine ether was purchased from Hubei Chengfeng Chemical Co., Ltd., and the remaining reagents and equipment were conventional reagents and equipment in the technical field.

[0038] Preparation of modified epoxy resin emulsion-1

[0039] The modified epoxy resin emulsion-1 was prepared by the following steps:

[0040] (1) In a reactor, 0.05 mol of allyl bromide, 0.03 mol of 2-hydroxy-1-naphthaldehyde, 0.5 g of sodium hydroxide and 100 mL of chloroform were added, heated to 50° C. for reaction for 3 hours, 0.005 mol of m-chloroperbenzoic acid was added, the temperature was adjusted to 5° C., the reaction was continued for 3 hours, and then filtered, washed and dried to obtain an epoxy naphthalene ring intermediate;

[0041] (2) In a reactor, 6 g of novolac epoxy acrylate, 3 g of epoxy naphthalene intermediate, 0.2 g of aluminum chloride and 50 mL of ethyl lactate were added, the temperature was raised to 70° C., the mixture was reacted for 5 hours, and then filtered, washed and dried to obtain a modified epoxy resin;

[0042] (3) After grinding 3 g of modified epoxy resin to 50 nm, adding 2 g of AEO-9 and 10 g of water, heating to 50° C. and shearing to obtain the modified epoxy resin emulsion-1;

[0043] Mass spectrum data of the naphthalene oxide ring intermediate: The product was analyzed by LC-MS, and the m / z of the product was 228.08 (100.0%), 229.12 (15.9%), and 230.07 (1.3%).

[0044] Preparation of modified epoxy resin emulsion-2

[0045] The preparation is basically the same as that of modified epoxy resin emulsion-1, except that step (1) and step (2) are not performed, and in step (3), the modified epoxy resin is replaced by an equal amount of phenolic epoxy acrylate.

[0046] Preparation of modified epoxy resin emulsion-3

[0047] The preparation method is basically the same as that of modified epoxy resin emulsion-1, except that step (1) is not performed and the epoxy naphthalene ring intermediate in step (2) is replaced by an equal amount of benzaldehyde.

[0048] Example 1

[0049] The high-viscosity anti-slip rubber asphalt waterproof coating is prepared by the following steps:

[0050] (1) mixing styrene-butadiene latex, modified epoxy resin emulsion-1, emulsified silicone oil and talcum powder uniformly to obtain a primary mixture;

[0051] (2) mixing the primary mixed material of step (1) with asphalt and grinding the mixture to obtain a mixed material;

[0052] (3) adding carboxymethyl cellulose to the mixture of step (2) and mixing evenly to obtain the high-viscosity anti-slip rubber asphalt waterproof coating;

[0053] Taking the total mass fraction as 100%, the components and their mass percentages are as follows:

[0054]

[0055] The balance is talc.

[0056] Example 2

[0057] The same as Example 1, except that the total mass fraction is 100%, and the components and their mass percentages are:

[0058]

[0059] The balance is calcium carbonate.

[0060] Example 3

[0061] The same as Example 1, except that the total mass fraction is 100%, and the components and their mass percentages are:

[0062]

[0063] The balance is kaolin.

[0064] Comparative Example 1

[0065] Commercially available rubber asphalt waterproof coating.

[0066] Comparative Example 2

[0067] The method is basically the same as Example 1, except that the styrene-butadiene latex is replaced by an equal amount of modified epoxy resin emulsion-1.

[0068] Comparative Example 3

[0069] The method is basically the same as Example 1, except that the modified epoxy resin emulsion-1 is replaced by an equal amount of styrene-butadiene latex.

[0070] Comparative Example 4

[0071] The method is basically the same as Example 1, except that the modified epoxy resin emulsion-1 is replaced by an equal amount of modified epoxy resin emulsion-2.

[0072] Comparative Example 5

[0073] The method is basically the same as Example 1, except that the modified epoxy resin emulsion-1 is replaced by an equal amount of modified epoxy resin emulsion-3.

[0074] Performance Testing

[0075] Bond strength test: According to the method specified in GB / T 16777-2008 "Test methods for building waterproof coatings", the bond strengths of the products of Examples 1-3 and Comparative Examples 1-5 were tested.

[0076] Peel strength test: According to the method specified in JC / T1069-2008 "Base treatment agent for asphalt-based waterproof membrane", the peel strength of the products of Examples 1-3 and Comparative Examples 1-5 was tested.

[0077] Anti-slip ability test: According to the method specified in Q / CR749.1-2020 "Protective coatings and paints for steel structures and components of railway bridges-Part 1 Steel Beams", the anti-slip coefficients of the products of Examples 1-3 and Comparative Examples 1-5 were tested.

[0078] High temperature resistance test: According to the method specified in GB / T328.8-2007 "Asphalt Waterproofing Membrane", the highest temperature at which the products of Examples 1-3 and Comparative Examples 1-5 do not slide, flow or drip is tested.

[0079] The test results are shown in the following table:

[0080]

[0081] According to the comparison of the test results of Examples 1-3 with those of Comparative Example 1, the high-viscosity and anti-skid rubber asphalt waterproof coating provided by the present invention has better bonding ability and mechanical strength than the rubber asphalt waterproof coating in the prior art, has strong anti-skid ability and high temperature resistance, and can be widely used in the field of waterproof coatings.

[0082] According to the comparison of the test results of Examples 1-3 and Comparative Example 2, it can be seen that the high-viscosity and anti-slip rubber asphalt waterproof coating provided by the present invention can effectively improve the bonding ability and overall performance of the waterproof coating by using styrene-butadiene latex and modified epoxy resin emulsion in combination.

[0083] According to the comparison of the test results of Examples 1-3 and Comparative Examples 3-5, it can be seen that by adding a modified epoxy resin emulsion to the high-viscosity and anti-skid rubber asphalt waterproof coating provided by the present invention, based on the naphthalene ring structure in the modified epoxy resin, the mechanical strength, anti-skid ability and high temperature resistance of the waterproof coating can be effectively improved.

[0084] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-viscosity and anti-slip rubber asphalt waterproof coating, characterized in that: Contains asphalt, styrene-butadiene latex, modified epoxy resin emulsion, tackifier, defoamer and filler; The modified epoxy resin emulsion comprises a modified epoxy resin, an emulsifier and water; The modified epoxy resin is prepared by reacting 2-hydroxy-1-naphthaldehyde, allyl bromide and phenolic epoxy acrylate; The modified epoxy resin is prepared by the following steps: (1) In a reactor, allyl bromide, 2-hydroxy-1-naphthaldehyde, sodium hydroxide and a solvent are added, heated to 40-50°C and reacted for 2-3 hours, then an organic peroxy acid is added, the temperature is adjusted to 0-10°C and the reaction is continued for 3-4 hours, and then filtered, washed and dried to obtain an epoxy naphthalene ring intermediate; (2) Adding phenolic epoxy acrylate, epoxy naphthalene intermediate, catalyst and solvent into a reactor, heating to 70-75° C. and reacting for 4-6 hours, filtering, washing and drying to obtain the modified epoxy resin; The molar ratio of allyl bromide, 2-hydroxy-1-naphthaldehyde and organic peroxyacid is (1.5-2): (1-1.2): (0.1-0.2); The mass ratio of the phenolic epoxy acrylate to the epoxy naphthalene ring intermediate is 1.5-2:

1.

2. The high-viscosity anti-slip rubber asphalt waterproof coating according to claim 1 is characterized in that: In the step (1), the organic peracid is selected from peracetic acid, perbenzoic acid or m-chloroperbenzoic acid.

3. The high-viscosity anti-slip rubber asphalt waterproof coating according to claim 1, characterized in that: The catalyst in step (2) is selected from aluminum chloride, boron trifluoride or ferric bromide.

4. The high-viscosity anti-slip rubber asphalt waterproof coating according to claim 1, characterized in that: The modified epoxy resin emulsion is prepared by the following steps: grinding the modified epoxy resin to 10-100 nm, adding an emulsifier and water, heating to 40-50° C. and shearing to obtain the modified epoxy resin emulsion.

5. The high-viscosity anti-slip rubber asphalt waterproof coating according to claim 4 is characterized in that: The mass ratio of the modified epoxy resin, emulsifier and water is (3-4): (2-2.5): (10-15).

6. The high-viscosity anti-slip rubber asphalt waterproof coating according to claim 1, characterized in that: The emulsifier is selected from one of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether or fatty acid polyoxyethylene ester.

7. The high-viscosity anti-slip rubber asphalt waterproof coating according to claim 1, characterized in that: The viscosity enhancer is selected from at least one of starch, carboxymethyl cellulose or sodium polyacrylate; the defoamer is selected from at least one of emulsified silicone oil, polydimethylsiloxane or polyoxyethylene polyoxypropanolamine ether; and the filler is selected from at least one of talc, calcium carbonate or kaolin.

8. The high-viscosity anti-slip rubber asphalt waterproof coating according to claim 1, characterized in that: Based on a total mass fraction of 100%, the high-viscosity anti-slip rubber asphalt waterproof coating comprises: Asphalt 35-45% Styrene butadiene latex 10-20% Modified epoxy resin emulsion 8-12% Thickener 2-4% Defoamer 1-3% The balance is filler.

9. The method for preparing the high-viscosity and anti-slip rubber asphalt waterproof coating according to any one of claims 1 to 8, characterized in that: The following steps are involved: (1) uniformly mixing styrene-butadiene rubber latex, modified epoxy resin emulsion, defoamer and filler to obtain a primary mixture; (2) mixing the primary mixed material of step (1) with asphalt and grinding them to obtain a mixed material; (3) Adding a tackifier to the mixture of step (2) and mixing the mixture evenly to obtain the high-viscosity and anti-slip rubber asphalt waterproof coating.

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