阅读说明：本技术 一种桥面混凝土用单组份二阶反应水性环氧封闭乳液 (Single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete ) 是由 杨建忠 周明 吴立新 郑坚 刘轶伦 邓宏 于 2021-09-22 设计创作，主要内容包括：本发明公开了一种桥面混凝土用单组份二阶反应水性环氧封闭乳液,按重量百分比包括如下组分：水性氨基混醚树脂2-8份、E20环氧树脂15-30份、E44环氧树脂2-8份、聚硅氧烷改性环氧树脂5-20份、缓冲溶液1-8份、树脂乳化剂10-15份、固化剂2-8份、流变剂1-3份、增韧剂5-10份、偶联剂1-2份、催化剂0.5-1份、成膜助剂0.3-0.5份、流平剂0.2-0.3份、润湿剂0.2-0.4份、消泡剂0.1-0.5份,水13-27份。本发明防水性能强,配制好后储存稳定性好,不易沉淀,能够长期使用,施工性好,适合各种施工方法。综合性能远优于目前国内市售的防水涂料。环保无毒,水性环氧乳液使用专门配方,对人和环境无害,更符合环保要求。本发明原料成本低廉,成本优势明显,具有较强的应用前景。(The invention discloses a single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete, which comprises the following components in percentage by weight: 2-8 parts of water-based amino mixed ether resin, 15-30 parts of E20 epoxy resin, 2-8 parts of E44 epoxy resin, 5-20 parts of polysiloxane modified epoxy resin, 1-8 parts of buffer solution, 10-15 parts of resin emulsifier, 2-8 parts of curing agent, 1-3 parts of rheological agent, 5-10 parts of toughening agent, 1-2 parts of coupling agent, 0.5-1 part of catalyst, 0.3-0.5 part of film-forming assistant, 0.2-0.3 part of flatting agent, 0.2-0.4 part of wetting agent, 0.1-0.5 part of defoaming agent and 13-27 parts of water. The invention has strong waterproof performance, good storage stability after preparation, difficult sedimentation, long-term use and good construction performance, and is suitable for various construction methods. The comprehensive performance is far superior to that of the waterproof coating sold in the domestic market at present. The water-based epoxy emulsion is environment-friendly and nontoxic, uses a special formula, is harmless to people and environment, and better meets the requirement of environmental protection. The invention has the advantages of low cost of raw materials, obvious cost advantage and stronger application prospect.)

1. The single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete is characterized by comprising the following components in percentage by weight: 2-8 parts of water-based amino mixed ether resin, 15-30 parts of E20 epoxy resin, 2-8 parts of E44 epoxy resin, 5-20 parts of polysiloxane modified epoxy resin, 1-8 parts of buffer solution, 10-15 parts of resin emulsifier, 2-8 parts of curing agent, 1-3 parts of rheological agent, 5-10 parts of toughening agent, 1-2 parts of coupling agent, 0.5-1 part of catalyst, 0.3-0.5 part of film-forming assistant, 0.2-0.3 part of flatting agent, 0.2-0.4 part of wetting agent, 0.1-0.5 part of defoaming agent and 13-27 parts of water.

2. The single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete according to claim 1 is characterized in that: the rheological agent is at least one of polyethylene wax, polyamide wax, polymeric urea and hydrogenated castor oil.

3. The single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete according to claim 1 is characterized in that: the film-forming assistant is one or more than two of propylene glycol methyl ether, dipropylene glycol butyl ether, tripropylene glycol butyl ether and propylene glycol methyl ether acetate.

4. The single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete according to claim 1 is characterized in that: the resin emulsifier is dimer acid or quaternary ammonium salt or 601 emulsifier produced by Hangzhou electrochemical group auxiliary chemical company.

5. The single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete according to claim 1 is characterized in that: the coupling agent is one or more of borane coupling agent, titanate and phosphate.

6. The single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete according to claim 1 is characterized in that: the wetting agent is one or more of TEGO-245, TEGO-500 of Digao, BYK346 of German Bick and CO-630 of Wacker.

7. The single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete according to claim 1 is characterized in that: the toughening agent is one or more of neopentyl glycol diglycidyl ether, 1, 4-butanediol diglycidyl ether and 1, 6-hexanediol diglycidyl ether.

8. The single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete according to claim 1 is characterized in that: the leveling agent is BYK333 from Bick, Germany.

9. The single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete according to claim 1 is characterized in that: the curing agent is dicyandiamide or water-type blocked isocyanate or ketimine.

Technical Field

The invention relates to the field of coatings, and particularly relates to a single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete.

Background

The existing highway or intercity traffic bridge surface waterproof mainly adopts polyurea, polyurethane and other waterproof coatings, high polymer modified asphalt waterproof coiled materials and the like. The waterproof coating such as polyurea polyurethane is influenced by factors such as base surface treatment, environmental temperature, construction quality and the like, the waterproof film has poor aging resistance and low adhesion with a concrete base layer, the surface of the waterproof film cracks and pulverizes after the vehicle is opened and operated soon, the mechanical strength is obviously reduced, the waterproof film is peeled off from the base layer, and the driving safety is influenced when the waterproof coating is serious. And waterproofing membrane can not the exclusive use, needs to increase the concrete protection layer, and the waterproof layer cost is improved to the one side, and on the other hand protection layer concrete surface does not have the protective coating, also appears the fracture pulverization gradually and loses effect along with ageing going on to lead to the waterproof membrane to expose in the environment, slowly loses the effect.

The epoxy coating is an adhesive material with excellent mechanical property, corrosion resistance, cohesiveness and chemical stability, and is widely applied to anticorrosive coatings, industrial floor coatings and the like. However, most of the current leading products are solvent type, and the contained organic solvent is flammable and explosive, volatile, smelly, causes air pollution when in use, has more or less toxicity, and causes great harm to the environment and human bodies. In recent years, environmental protection has been increasingly emphasized, and regulations for controlling Volatile Organic Compounds (VOCs) are promulgated in many countries, and the standards for implementation are becoming more stringent. These factors have prompted researchers in various countries around the world to spend considerable efforts on developing water-based products, but the performance of the water-based epoxy coatings appearing on the market at present is still far from the solvent-based products, so that the development of novel high-performance single-component water-based epoxy coatings and the gradual replacement of the solvent-based products by the water-based epoxy coatings have important practical significance and wide application prospect, and are urgent requirements of national economic construction.

At present, a lot of researches on concrete structure waterproof coatings are carried out on the market, the researches mainly comprise two main types, one is a polyurethane waterproof coating, and the waterproof coating is usually diluted by organic solvents containing toluene, xylene and the like during application and has strong toxicity; another type is emulsion, for example, a silane modified acrylic emulsion with room temperature crosslinking characteristic obtained by soap-free emulsion polymerization disclosed in patent No. 201210480382.3, which is expensive in large-area application, and both types of waterproof coatings have the main component of chemical admixture being organic high molecular paint film, the solidification time of film forming material is long, the weather resistance is poor, the compound formula often has the disadvantage of interfacial incompatibility, and the compound formula can crack and peel with the change of temperature and expansion and contraction in 2 to 3 years.

In conclusion, it is a technical problem to be solved by those skilled in the art how to provide a concrete waterproof material which is healthy, environment-friendly, low in cost, short in solidification time of a film forming substance, good in weather resistance, strong in adhesive force and not easy to peel off.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete, which has strong waterproofness, good environmental protection performance and excellent comprehensive performance.

In order to achieve the purpose, the technical scheme of the invention is that the single-component second-order reactive water-based epoxy closed emulsion for bridge deck concrete comprises the following components in percentage by weight: 2-8 parts of water-based amino mixed ether resin, 15-30 parts of E20 epoxy resin, 2-8 parts of E44 epoxy resin, 5-20 parts of polysiloxane modified epoxy resin, 1-8 parts of buffer solution, 10-15 parts of resin emulsifier, 2-8 parts of curing agent, 1-3 parts of rheological agent, 5-10 parts of toughening agent, 1-2 parts of coupling agent, 0.5-1 part of catalyst, 0.3-0.5 part of film-forming assistant, 0.2-0.3 part of flatting agent, 0.2-0.4 part of wetting agent, 0.1-0.5 part of defoaming agent and 13-27 parts of water.

The rheological agent forms a strong network structure in the single-component water-based epoxy emulsion, has excellent thixotropic property, excellent anti-sagging capability and anti-settling capability, can keep the storage stability of the slurry, and prevents the slurry from layering and separating out.

Preferably, the rheological agent is at least one of polyethylene wax, polyamide wax, polymeric urea and hydrogenated castor oil.

The film-forming assistant is favorable for forming a film of the single-component aqueous epoxy emulsion, and the preferable film-forming assistant is one or more than two of propylene glycol methyl ether, dipropylene glycol butyl ether, tripropylene glycol butyl ether and propylene glycol methyl ether acetate.

The emulsifier reduces the interfacial tension of the components in the mixed system and forms a relatively strong film on the surface of the droplets, and an electric double layer is formed on the surface of the droplets due to the electric charge given by the emulsifier, preventing the droplets from aggregating with each other, thereby maintaining a uniform emulsion. The preferred resin emulsifier is dimer acid or quaternary ammonium salt or 601 emulsifier produced by Hangzhou electrochemical group auxiliary chemical company.

The coupling agent is a substance with two functional groups with different properties, and the molecular structure of the coupling agent is mainly characterized in that the molecule contains two groups with different chemical properties, one group is an inorganophilic group and is easy to chemically react with the surface of an inorganic substance; the other is an organophilic group which can chemically react with synthetic resin or other polymers or generate hydrogen bonds to be dissolved in the coating to improve the performance of the coating. Preferably, the coupling agent is one or more of a borane coupling agent, titanate and phosphate.

Wetting generally refers to the spreading of the liquid of a wetting agent over a solid, the wetting displacing air from the surface of the particles of the one-component aqueous epoxy emulsion and aiding in the mechanical separation of the particles, allowing the coating to disperse uniformly and no longer be able to come together again. The wetting effect has direct influence on the covering power, transparency, viscosity, fluidity, mechanical strength and the like of the paint. The addition of the wetting agent can improve the grinding and dispersing efficiency, shorten the grinding time and be beneficial to improving the stability of the quality of the single-component water-based epoxy emulsion product. Preferably, the wetting agent is one or a mixture of more than two of TEGO-245, TEGO-500 from Digao, BYK346 from Beck, Germany, and CO-630 from Wacker.

The toughening agent can reduce the brittleness of resin, increase the toughness and improve the bearing strength capability, is mixed with the resin, contains active groups, can participate in the curing reaction of the resin, and improves the elongation at break and the impact strength, and the preferred toughening agent is one or more of neopentyl glycol diglycidyl ether, 1, 4-butanediol diglycidyl ether and 1, 6-hexanediol diglycidyl ether.

Leveling agent the leveling agent improves the leveling of the system, preferably the leveling agent is BYK333 from BYK, germany.

The curing agent promotes or controls the curing reaction, so that the thermosetting resin has an irreversible change process, has high reaction activity, can be quickly cured at room temperature or low temperature, has a permeation repairing effect on microcracks on the surface of concrete, and is preferably dicyandiamide or water-type blocked isocyanate or ketimine.

The catalyst can reduce the activation energy of a system, enhance the compatibility of the single-component aqueous epoxy emulsion component and further increase the performance of the single-component aqueous epoxy emulsion, and can be one or a mixture of more than two of cyclodextrin, crown ether and dodecyl trimethyl ammonium chloride. The defoaming agent can quickly eliminate harmful bubbles generated in the production and use processes of the water-based epoxy emulsion, enhance the service performance of the single-component water-based epoxy emulsion and enhance the service effect of the single-component water-based epoxy emulsion product. The buffer solution is used for adjusting the pH value of the single-component aqueous epoxy emulsion system, enhancing the stability of the whole single-component aqueous epoxy emulsion system, keeping the performance of the single-component aqueous epoxy emulsion, and controlling the pH value of the system to be 7-10. The buffer solution is one or more than two of sulfamate, naphthalene dicarboxylic acid, methanesulfonate, hydroxymaleate, phenylacetate, glutamate, gluconate, acetic acid, phosphoric acid, salicylic acid, sodium hydroxide, potassium hydroxide, calcium hydroxide, potassium tert-butoxide, sulfanilamide, methanesulfonate and oxalate.

The invention has the advantages and beneficial effects that: the waterproof performance is strong, the storage stability is good after the preparation, the precipitation is not easy to occur, the long-term use can be realized, the construction performance is good, and the waterproof paint is suitable for various construction methods. The comprehensive performance is far superior to that of the waterproof coating sold in the domestic market at present. The single-component water-based epoxy emulsion is environment-friendly and nontoxic, uses a special formula, is harmless to people and environment, and better meets the requirement of environmental protection. The invention has the advantages of low cost of raw materials, obvious cost advantage and stronger application prospect.

Detailed Description

The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1

2 parts of water-based amino mixed ether resin, 25 parts of E20 epoxy resin, 3 parts of E44 epoxy resin, 15 parts of polysiloxane modified epoxy resin, 1 part of buffer solution acetic acid, 10 parts of resin emulsifier dimer acid, 2 parts of curing agent dicyandiamide, 3 parts of rheological agent polyethylene wax, 5 parts of flexibilizer neopentyl glycol diglycidyl ether, 1 part of borane coupling agent, 0.5 part of catalyst cyclodextrin, 0.3 part of film-forming aid propylene glycol methyl ether, 0.2 part of BYK333 flatting agent, 0.2 part of TEGO-245 wetting agent, 0.1 part of defoaming agent and 13 parts of water.

Example 2

8 parts of water-based amino mixed ether resin, 30 parts of E20 epoxy resin, 8 parts of E44 epoxy resin, 20 parts of polysiloxane modified epoxy resin, 8 parts of buffer solution phosphoric acid, 15 parts of resin emulsifier dimer acid, 8 parts of curing agent dicyandiamide, 3 parts of rheological agent polyamide wax, 10 parts of flexibilizer 1, 4-butanediol diglycidyl ether, 2 parts of borane coupling agent, 1 part of catalyst cyclodextrin, 0.5 part of film-forming aid dipropylene glycol butyl ether, 0.3 part of BYK333 flatting agent, 0.4 part of TEGO-500 wetting agent, 0.5 part of defoaming agent and 27 parts of water.

Example 3

2 parts of water-based amino mixed ether resin, 30 parts of E20 epoxy resin, 3 parts of E44 epoxy resin, 20 parts of polysiloxane modified epoxy resin, 8 parts of buffer solution phosphoric acid, 15 parts of resin emulsifier quaternary ammonium salt, 8 parts of curing agent ketimine, 1 part of rheological agent polymeric urea, 10 parts of flexibilizer 1, 6-hexanediol diglycidyl ether, 2 parts of titanate coupling agent, 1 part of catalyst crown ether, 0.5 part of film-forming auxiliary agent dipropylene glycol butyl ether, 0.2 part of BYK333 flatting agent, 0.4 part of BYK346 wetting agent, 0.5 part of defoaming agent and 20 parts of water.

Example 4

8 parts of water-based amino mixed ether resin, 30 parts of E20 epoxy resin, 3 parts of E44 epoxy resin, 15 parts of polysiloxane modified epoxy resin, 1 part of buffer solution calcium hydroxide, 10 parts of resin emulsifier quaternary ammonium salt, 2 parts of curing agent water-type blocked isocyanate, 1 part of rheological agent hydrogenated castor oil, 5 parts of flexibilizer 1, 6-hexanediol diglycidyl ether, 1 part of titanate coupling agent, 0.5 part of catalyst crown ether, 0.3 part of film-forming auxiliary agent tripropylene glycol butyl ether, 0.2 part of BYK333 leveling agent, and 0.2 part of wetting agent CO-630 wt%: TEGO-245 wt% of a 1:1 mixture, 0.1 part of a defoaming agent and 15 parts of water.

Example 5

5 parts of waterborne amino mixed ether resin, 25 parts of E20 epoxy resin, 5 parts of E44 epoxy resin, 20 parts of polysiloxane modified epoxy resin, 5 parts of buffer solution calcium hydroxide, 10 parts of resin emulsifier 601 emulsifier, 5 parts of curing agent water-type blocked isocyanate, 1 part of rheological agent hydrogenated castor oil and 8 parts of toughening agent which is neopentyl glycol diglycidyl ether wt%: 1, 4-butanediol diglycidyl ether (wt%) 2:1, phosphate coupling agent 2, catalyst dodecyl trimethyl ammonium chloride 0.5, film-forming assistant propylene glycol methyl ether acetate 0.4, BYK333 leveling agent 0.2, wetting agent CO-630 0.3, defoaming agent 0.3 and water 13.

Example 6

4 parts of water-based amino mixed ether resin, 15 parts of E20 epoxy resin, 2 parts of E44 epoxy resin, 5 parts of polysiloxane modified epoxy resin, 8 parts of buffer solution gluconate, 15 parts of resin emulsifier dimer acid, 5 parts of curing agent water-based blocked isocyanate, 3 parts of rheological agent polyamide wax, 10 parts of flexibilizer 1, 4-butanediol diglycidyl ether, 2 parts of phosphate coupling agent, 0.5 part of catalyst dodecyl trimethyl ammonium chloride, 0.4 part of film-forming aid propylene glycol methyl ether acetate, 0.3 part of BYK333 leveling agent, 0.3 part of wetting agent BYK346, 0.5 part of defoaming agent and 27 parts of water.

Examples of the experiments

Examples 1-6 are compared to comparative commercially available water-resistant coatings for performance testing: single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete with the specification of 150 multiplied by 350mm and taking bridge deck concrete as a substrateThe liquid is milky uniform liquid without obvious particles, the preparation of a paint film sample plate is carried out according to the technical specifications for constructing the road asphalt pavement (JTG F40-2004) and the technical specifications for constructing the water-based epoxy asphalt waterproof bonding layer of the cement concrete bridge deck (DB32/T2285-2012), the bridge deck concrete base layer is subjected to shot blasting and floating ash cleaning to clean the concrete surface layer, and the coating is carried out according to the proportion of 0.2-0.3kg/m²The board making, inventive properties are compared with commercially available water-proofing coatings in the following table:

as can be seen from the above table, examples 1-6 were water-impermeable at a water pressure of 0.3MPa for 30min, whereas comparative examples were water-permeable and heat-resistant, and did not flow or slide at 70 ℃ and the painted surface thereof was peeled off by flowing. The adhesive force is strong, and the invention is superior to the commercial waterproof coating. The invention is characterized in that Ca (OH)₂The paint surface is stable and firm and has sufficient corrosion resistance, while the paint surface of the comparative example is separated and disintegrated to expose a concrete layer. In addition, the drying performance of the invention is also superior to that of the comparative example, and meets the requirements of GB/T16777-.

In conclusion, the invention has the advantages of strong waterproof performance, good storage stability after preparation, difficult sedimentation, long-term use and good construction property, and is suitable for various construction methods. The comprehensive performance is far superior to that of the waterproof coating sold in the domestic market at present. The single-component second-order reaction water-based epoxy closed emulsion for bridge deck concrete is environment-friendly and nontoxic, uses a special formula, is harmless to people and environment, and better meets the requirement of environmental protection. The cost advantage is obvious, and the method has a strong application prospect.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.