Production process of high-molecular interface agent of grouting type high-molecular binder crack repairing glue
阅读说明：本技术 注浆型高分子粘结剂裂缝修补胶的高分子界面剂生产工艺 (Production process of high-molecular interface agent of grouting type high-molecular binder crack repairing glue ) 是由 李晓云 陈明惠 李丽坤 张蓉 于 2021-07-07 设计创作，主要内容包括：本发明公开了注浆型高分子粘结剂裂缝修补胶的高分子界面剂生产工艺,该高分子界面剂生产工艺包括以下步骤：首先将重量份10-15份改性水性聚氨酯和重量份15-17份去离子水混合,并在温度50-60℃、转速3000-3200rpm的条件下,搅拌5-8mi n,得到第一混合料；将向第一混合料中依次加入40-50份改性苯丙乳液、3-7份改性消泡剂、6-8份增稠剂和18-22份石英粉,并在温度90-96℃、转速3000-3200rpm的条件下,搅拌50-60mi n后冷却,即得到高分子界面剂；本发明的高分子界面剂具有着耐水性、热稳定性能、耐水性、耐候性、耐高温性能、抗张强度的优点。(The invention discloses a production process of a high-molecular interface agent of a grouting type high-molecular binder crack repair adhesive, which comprises the following steps: firstly, mixing 10-15 parts by weight of modified waterborne polyurethane and 15-17 parts by weight of deionized water, and stirring for 5-8min at the temperature of 50-60 ℃ and the rotating speed of 3000-3200rpm to obtain a first mixture; adding 40-50 parts of modified styrene-acrylic emulsion, 3-7 parts of modified defoaming agent, 6-8 parts of thickening agent and 18-22 parts of quartz powder into the first mixture in sequence, stirring for 50-60min at the temperature of 90-96 ℃ and the rotation speed of 3000 plus materials of 3200rpm, and cooling to obtain the high-molecular interfacial agent; the high molecular interface agent has the advantages of water resistance, thermal stability, water resistance, weather resistance, high temperature resistance and tensile strength.)
1. The production process of the high-molecular interface agent of the grouting high-molecular binder crack repairing glue is characterized by comprising the following steps of: the production process of the polymer interfacial agent comprises the following steps:
the first step is as follows: firstly, mixing 10-15 parts by weight of modified waterborne polyurethane and 15-17 parts by weight of deionized water, and stirring for 5-8min at the temperature of 50-60 ℃ and the rotating speed of 3000-;
the second step is that: and sequentially adding 40-50 parts of modified styrene-acrylic emulsion, 3-7 parts of modified defoaming agent, 6-8 parts of thickening agent and 18-22 parts of quartz powder into the first mixture, stirring for 50-60min at the temperature of 90-96 ℃ and the rotating speed of 3000 plus materials of 3200rpm, and cooling to obtain the polymer interface agent.
2. The production process of the high molecular interfacial agent of the grouting type high molecular adhesive crack repair adhesive according to claim 1, wherein the preparation process of the modified waterborne polyurethane comprises the following steps:
the first step is as follows: firstly, weighing hexamethylene diisocyanate and polyester polyol subjected to dehydration treatment, adding the hexamethylene diisocyanate and the polyester polyol into a reaction container, then adding 5-6g of catalyst a, reacting for 60-70min at the temperature of 80-85 ℃, and dropwise adding an acetone solvent into the reaction container at a dropping speed of 10 seconds in the reaction process to obtain a first reaction liquid; wherein the molar ratio of the hexamethylene diisocyanate to the polyester polyol is 1: 1.2;
the second step is that: adding fenugreek gum and 2, 2-dihydroxymethyl propionic acid into the first reaction liquid to continue reacting for 60-70min, simultaneously dropwise adding an acetone solvent into a reaction container at a dropping speed of 10 seconds, then cooling to 45-50 ℃, adding triethylamine to neutralize and react for 20-30min, then adding ethylenediamine to chain extend, dropwise adding into the reaction container at a dropping speed of 10 seconds, emulsifying and dispersing with deionized water for 30min, and stopping stirring to obtain a second reaction liquid; the molar ratio of the first reaction liquid to the fenugreek gum to the 2, 2-dihydroxy methyl propionic acid to the triethylamine is 1:1:1: 1.2;
the third step: and carrying out reduced pressure distillation on the obtained second reaction liquid at the temperature of 40-45 ℃ and under the pressure of-0.095 to-0.01 mpa, and removing the solvent acetone to obtain the modified waterborne polyurethane.
3. The production process of the polymer interface agent of the grouting type polymer adhesive crack repair adhesive according to claim 2, wherein the catalyst a is dibutyltin dilaurate.
4. The production process of the high molecular interfacial agent of the grouting type high molecular adhesive crack repair adhesive according to claim 1, wherein the preparation process of the modified styrene-acrylic emulsion comprises the following steps:
the first step is as follows: adding nonylphenol polyoxyethylene ether and sodium dodecyl sulfate into deionized water, and mixing to obtain an emulsifier water solution; wherein the molar ratio of the nonylphenol polyoxyethylene ether to the sodium dodecyl sulfate is 1: 1;
the second step is that: mixing two-thirds of the volume of the emulsifier water solution with styrene, butyl acrylate, N-hydroxymethyl acrylamide and vinyl triethoxysilane, emulsifying for 3min in a high-speed dispersion machine to obtain pre-emulsion, and stirring for later use; wherein the molar ratio of the emulsifier water solution, the styrene, the butyl acrylate, the N-hydroxymethyl acrylamide and the vinyl triethoxysilane is 1:1:1: 1;
the third step: adding deionized water, cationic starch and ammonium persulfate into a 250mL three-neck flask, adjusting the pH value to 9-11, stirring, heating to 90 ℃, carrying out oxidative degradation for 1h, then cooling to 38-40 ℃, adjusting the pH value to 3-4, and adding FeSO4And H2O2Keeping the temperature for 30 min; adding the rest two-thirds of emulsifier water solution, heating to 80 deg.C, and respectively adding the pre-emulsion and H2O2And preserving the heat for 2 hours after the dropwise addition is finished to obtain the modified styrene-acrylic emulsion.
5. The production process of the high molecular interfacial agent for the grouting type high molecular adhesive crack repair adhesive according to claim 1, wherein the preparation process of the modified defoaming agent comprises the following steps:
the first step is as follows: adding hydrogen-containing silicone oil, polyether and a catalyst b into a reaction container, mixing, and introducing nitrogen under the conditions of the temperature of 120-150 ℃ and the rotating speed of 60-80rpm, so as to react for 30-40min under the nitrogen atmosphere, thereby obtaining polyether modified organosilicon; wherein the mass ratio of the hydrogen-containing silicone oil to the polyether to the catalyst b is 50:100: 5;
the second step is that: adding dimethyl silicone oil, hydrophobic fumed silica, polyether modified organic silicon and methyl vinyl MQ silicon resin into a reaction container, reacting for 2h at the temperature of 140-150 ℃ and the rotating speed of 500-600rpm, and cooling to room temperature to obtain silicon paste; wherein: the molar ratio of the dimethyl silicone oil to the hydrophobic fumed silica to the polyether modified organic silicon to the methyl vinyl MQ silicon resin is 1:1:1: 1;
the third step: mixing the silicon paste, the emulsifier and the deionized water, stirring at the temperature of 80-85 ℃ for 50-60min, cooling to room temperature, and performing high-speed shearing treatment to obtain the modified defoaming agent.
6. The production process of the high molecular interface agent of the grouting type high molecular adhesive crack repair adhesive according to claim 5, wherein the catalyst b is chloroplatinic acid.
7. The production process of the high molecular interfacial agent for the grouting type high molecular adhesive crack repair adhesive according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 10-15 parts of modified waterborne polyurethane, 40-50 parts of modified styrene-acrylic emulsion, 3-7 parts of modified defoaming agent, 6-8 parts of thickening agent, 18-22 parts of quartz powder and 15-17 parts of deionized water.
Technical Field
The invention belongs to the technical field of high-molecular binder crack repair glue, and relates to a high-molecular interfacial agent production process, in particular to a high-molecular interfacial agent production process of grouting type high-molecular binder crack repair glue.
Background
The interfacial agent is formed by treating the surface of the object, which may be physically acting adsorption or coating, and often also by physicochemical action. The aim is to improve or completely modify the physico-technical properties and surface chemical properties of the material surface. The product for changing the physical and chemical properties of the interface of the object can also be called an interface modifier. The surface treatment of an object to improve the surface properties of the material is called surface treatment. The interfacial agent is applied in different fields, the technical means and purposes of the surface treatment of the object are different, and the treatment and modification of the object interface by the common interfacial agent can be divided into four technical types: wetting and impregnation, coating treatment, coupling agent treatment and surface modification.
The document CN100497469 discloses an environment-friendly polymer interfacial agent. The ingredients comprise: deionized water, acrylamide, isobutene, 2-hydroxyethyl methacrylate, sodium sulfite, ethylene diamine tetraacetic acid disodium, ammonium persulfate and styrene-acrylic emulsion. The invention overcomes the defects of high toxicity, serious environmental pollution and the like of the traditional adhesive product because of containing formaldehyde which is a harmful substance, and is an environment-friendly product. The adhesive has the characteristics of simple production process, low cost, no toxicity, no odor, no environmental pollution, resource saving and the like, and has high adhesive strength, very strong permeability, good water resistance and convenient construction. Can be used to replace putty powder, tile glue, wallpaper glue, 107 glue and other products.
In the prior art, the polymer interfacial agent has general performances in the aspects of water resistance, thermal stability, water resistance, weather resistance, high temperature resistance and tensile strength, and the preparation process has the problems of complexity and high capacity consumption.
Disclosure of Invention
The invention aims to provide a production process of a high-molecular interface agent of a grouting type high-molecular adhesive crack repair adhesive, aiming at solving the problems that the high-molecular interface agent in the prior art is general in water resistance, thermal stability, water resistance, weather resistance, high temperature resistance and tensile strength, and the preparation process is relatively complex and has high capacity consumption.
The purpose of the invention can be realized by the following technical scheme:
the production process of the high-molecular interface agent of the grouting type high-molecular binder crack repairing glue comprises the following steps:
the first step is as follows: firstly, mixing 10-15 parts by weight of modified waterborne polyurethane and 15-17 parts by weight of deionized water, and stirring for 5-8min at the temperature of 50-60 ℃ and the rotating speed of 3000-;
the second step is that: and sequentially adding 40-50 parts of modified styrene-acrylic emulsion, 3-7 parts of modified defoaming agent, 6-8 parts of thickening agent and 18-22 parts of quartz powder into the first mixture, stirring for 50-60min at the temperature of 90-96 ℃ and the rotating speed of 3000 plus materials of 3200rpm, and cooling to obtain the polymer interface agent.
Preferably, the preparation process of the modified waterborne polyurethane comprises the following steps:
the first step is as follows: firstly, weighing hexamethylene diisocyanate and polyester polyol subjected to dehydration treatment, adding the hexamethylene diisocyanate and the polyester polyol into a reaction container, then adding 5-6g of catalyst a, reacting for 60-70min at the temperature of 80-85 ℃, and dropwise adding an acetone solvent into the reaction container at a dropping speed of 10 seconds in the reaction process to obtain a first reaction liquid; wherein the molar ratio of the hexamethylene diisocyanate to the polyester polyol is 1: 1.2;
the second step is that: adding fenugreek gum and 2, 2-dihydroxymethyl propionic acid into the first reaction liquid to continue reacting for 60-70min, simultaneously dropwise adding an acetone solvent into a reaction container at a dropping speed of 10 seconds, then cooling to 45-50 ℃, adding triethylamine to neutralize and react for 20-30min, then adding ethylenediamine to chain extend, dropwise adding into the reaction container at a dropping speed of 10 seconds, emulsifying and dispersing with deionized water for 30min, and stopping stirring to obtain a second reaction liquid; the molar ratio of the first reaction liquid to the fenugreek gum to the 2, 2-dihydroxy methyl propionic acid to the triethylamine is 1:1:1: 1.2;
the third step: carrying out reduced pressure distillation on the obtained second reaction liquid at the temperature of 40-45 ℃ and under the pressure of-0.095 to-0.01 mpa, and removing solvent acetone to obtain modified waterborne polyurethane; the fenugreek gum is prepared by modifying natural substances, and because the molecules of the fenugreek gum contain hydroxyl structures, the fenugreek gum can generate a crosslinking reaction with the waterborne polyurethane to produce a crosslinked network structure, so that the water resistance, the mechanical property and the thermal stability of the waterborne polyurethane are greatly improved, and the high-molecular interface agent also has the water resistance, the mechanical property and the thermal stability in the using process; the problem that the existing waterborne polyurethane emulsion has insufficient water resistance and is one of the most main factors influencing the application of waterborne polyurethane paint in practice is solved; in addition, during engineering construction, certain problems exist in the application of the waterborne polyurethane coating, for example, for a two-component waterborne polyurethane coating, the drying speed is relatively slow after the coating is mixed into construction raw materials, and the coating needs to be maintained for a long time; carbon dioxide bubbles generated in the reaction process of the waterborne polyurethane coating and water may remain in the coating film in a large amount to influence the performance of the coating film; more importantly, in the aqueous polyurethane coating, the added large amount of aqueous coating can affect the iron substrate in engineering buildings, cause the problem of flash corrosion and even affect the wettability and appearance performance of the surface coating.
Preferably, catalyst a is dibutyltin dilaurate.
Preferably, the preparation process of the modified styrene-acrylic emulsion comprises the following steps:
the first step is as follows: adding nonylphenol polyoxyethylene ether and sodium dodecyl sulfate into deionized water, and mixing to obtain an emulsifier water solution; wherein the molar ratio of the nonylphenol polyoxyethylene ether to the sodium dodecyl sulfate is 1: 1;
the second step is that: mixing two-thirds of the volume of the emulsifier water solution with styrene, butyl acrylate, N-hydroxymethyl acrylamide and vinyl triethoxysilane, emulsifying for 3min in a high-speed dispersion machine to obtain pre-emulsion, and stirring for later use; wherein the molar ratio of the emulsifier water solution, the styrene, the butyl acrylate, the N-hydroxymethyl acrylamide and the vinyl triethoxysilane is 1:1: 1; 1: 1;
the third step: adding deionized water, cationic starch and ammonium persulfate into a 250mL three-neck flask, adjusting the pH value to 9-11, stirring, heating to 90 ℃, carrying out oxidative degradation for 1h, then cooling to 38-40 ℃, adjusting the pH value to 3-4, and adding FeSO4And H2O2Keeping the temperature for 30 min; adding the rest two-thirds of emulsifier water solution, heating to 80 deg.C, and respectively adding the pre-emulsion and H2O2Keeping the temperature for 2 hours after the dropwise adding is finished to obtain a modified styrene-acrylic emulsion; the styrene-acrylic emulsion disclosed by the invention not only has the advantages of good film forming property, strong adhesive force, oxidation resistance and oil resistance, but also has good water resistance, weather resistance, high temperature resistance and tensile strength; so that the polymer interface agent has good water resistance, weather resistance, high temperature resistance and tensile strength; the method solves the problems that in the prior art, styrene-acrylic emulsion is prepared by copolymerizing styrene and acrylate monomers, and the emulsion has the advantages of high cost performance, good film forming property, strong adhesion, oxidation resistance and oil resistance, but the linear main chain structure of a carbon-carbon single bond and a side chain group mainly containing carboxyl ester cause poor water resistance, weather resistance, high temperature resistance and tensile strength.
Preferably, the preparation process of the modified defoaming agent comprises the following steps:
the first step is as follows: adding hydrogen-containing silicone oil, polyether and a catalyst b into a reaction container, mixing, and introducing nitrogen under the conditions of the temperature of 120-150 ℃ and the rotating speed of 60-80rpm, so as to react for 30-40min under the nitrogen atmosphere, thereby obtaining polyether modified organosilicon; wherein the mass ratio of the hydrogen-containing silicone oil to the polyether to the catalyst b is 50:100: 5;
the second step is that: adding dimethyl silicone oil, hydrophobic fumed silica, polyether modified organic silicon and methyl vinyl MQ silicon resin into a reaction container, reacting for 2h at the temperature of 140-150 ℃ and the rotating speed of 500-600rpm, and cooling to room temperature to obtain silicon paste; wherein: the molar ratio of the dimethyl silicone oil to the hydrophobic fumed silica to the polyether modified organic silicon to the methyl vinyl MQ silicon resin is 1: 1; 1; 1;
the third step: mixing silicon paste, an emulsifier and deionized water, stirring at 80-85 ℃ for 50-60min, cooling to room temperature, and performing high-speed shearing treatment to obtain a modified defoaming agent; the modified defoaming agent provided by the invention enables the polyether chain segment to enhance the hydrophilicity of the polyether modified organosilicon, improves the compatibility with other water-soluble substances, can adapt to strong acid, strong alkali and high temperature environments, greatly improves the application range of the defoaming agent, and has the advantage of good foam inhibition performance of the polyether defoaming agent.
Preferably, catalyst b is chloroplatinic acid.
Preferably, the feed additive consists of the following raw materials in parts by weight: 10-15 parts of modified waterborne polyurethane, 40-50 parts of modified styrene-acrylic emulsion, 3-7 parts of modified defoaming agent, 6-8 parts of thickening agent, 18-22 parts of quartz powder and 15-17 parts of deionized water.
Compared with the prior art, the invention has the beneficial effects that: the polymer interfacial agent is composed of the following raw materials in parts by weight: 10-15 parts of modified waterborne polyurethane, 40-50 parts of modified styrene-acrylic emulsion, 3-7 parts of modified defoaming agent, 6-8 parts of thickening agent, 18-22 parts of quartz powder and 15-17 parts of deionized water;
the fenugreek gum is prepared by modifying natural substances, and because the molecules of the fenugreek gum contain hydroxyl structures, the fenugreek gum can generate a crosslinking reaction with the waterborne polyurethane to produce a crosslinked reticular structure, so that the water resistance, the mechanical property and the thermal stability of the waterborne polyurethane are greatly improved, and the high-molecular interface agent also has the water resistance, the mechanical property and the thermal stability in the using process; the problem that the existing waterborne polyurethane emulsion has insufficient water resistance and is one of the most main factors influencing the application of waterborne polyurethane paint in practice is solved; in addition, during engineering construction, certain problems exist in the application of the waterborne polyurethane coating, for example, for a two-component waterborne polyurethane coating, the drying speed is relatively slow after the coating is mixed into construction raw materials, and the coating needs to be maintained for a long time; carbon dioxide bubbles generated in the reaction process of the waterborne polyurethane coating and water may remain in the coating film in a large amount to influence the performance of the coating film; more importantly, in the waterborne polyurethane coating, a large amount of added waterborne coating can affect an iron substrate in an engineering building, so that the problem of flash corrosion is caused, and the wettability and the appearance performance of the surface coating are even affected;
the styrene-acrylic emulsion disclosed by the invention not only has the advantages of good film forming property, strong adhesive force, oxidation resistance and oil resistance, but also has good water resistance, weather resistance, high temperature resistance and tensile strength; so that the polymer interface agent has good water resistance, weather resistance, high temperature resistance and tensile strength; the method solves the problems that in the prior art, styrene-acrylic emulsion is prepared by copolymerizing styrene and acrylate monomers, and the emulsion has the advantages of high cost performance, good film forming property, strong adhesion, oxidation resistance and oil resistance, but the linear main chain structure of a carbon-carbon single bond and a side chain group mainly containing carboxyl ester cause poor water resistance, weather resistance, high temperature resistance and tensile strength;
the modified defoaming agent provided by the invention enables the polyether chain segment to enhance the hydrophilicity of the polyether modified organosilicon, improves the compatibility with other water-soluble substances, can adapt to strong acid, strong alkali and high temperature environments, greatly improves the application range of the defoaming agent, and has the advantage of good foam inhibition performance of the polyether defoaming agent;
therefore, the high molecular interface agent has the advantages of water resistance, thermal stability, water resistance, weather resistance, high temperature resistance and tensile strength.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, 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.
Example 1
The production process of the high-molecular interface agent of the grouting type high-molecular binder crack repairing glue comprises the following steps:
the first step is as follows: firstly, modified waterborne polyurethane and deionized water are mixed according to the weight ratio of 10: 15, and stirring for 5min at the temperature of 50 ℃ and the rotating speed of 3000rpm to obtain a first mixture;
the second step is that: and (3) adding 40 parts of modified styrene-acrylic emulsion, 3 parts of modified defoaming agent, 6 parts of thickening agent and 18 parts of quartz powder into the first mixture in sequence, stirring for 50min at the temperature of 90 ℃ and the rotating speed of 3000rpm, and cooling to obtain the high-molecular interface agent.
The preparation process of the modified waterborne polyurethane comprises the following steps:
the first step is as follows: firstly, weighing hexamethylene diisocyanate and polyester polyol subjected to dehydration treatment, adding the hexamethylene diisocyanate and the polyester polyol into a reaction container, adding 5g of catalyst a, reacting for 60min at the temperature of 80 ℃, and dropwise adding an acetone solvent into the reaction container at a dropping speed of 10 seconds in the reaction process to obtain a first reaction liquid; wherein the molar ratio of the hexamethylene diisocyanate to the polyester polyol is 1: 1.2;
the second step is that: adding fenugreek gum and 2, 2-dihydroxymethyl propionic acid into the first reaction liquid to continue to react for 60min, simultaneously dropwise adding an acetone solvent into the reaction container at a dropping speed of 10 seconds, then cooling to 45 ℃, adding triethylamine to neutralize and react for 20min, then adding ethylenediamine to chain extend, dropwise adding into the reaction container at a dropping speed of 10 seconds, emulsifying and dispersing with deionized water for 30min, and stopping stirring to obtain a second reaction liquid; the molar ratio of the first reaction liquid to the fenugreek gum to the 2, 2-dihydroxy methyl propionic acid to the triethylamine is 1:1:1: 1.2;
the third step: and carrying out reduced pressure distillation on the obtained second reaction liquid at the temperature of 40 ℃ and under the pressure of-0.095 mpa, and removing the solvent acetone to obtain the modified waterborne polyurethane.
Catalyst a is dibutyltin dilaurate.
The preparation process of the modified styrene-acrylic emulsion comprises the following steps:
the first step is as follows: adding nonylphenol polyoxyethylene ether and sodium dodecyl sulfate into deionized water, and mixing to obtain an emulsifier water solution; wherein the molar ratio of the nonylphenol polyoxyethylene ether to the sodium dodecyl sulfate is 1: 1;
the second step is that: mixing two-thirds of the volume of the emulsifier water solution with styrene, butyl acrylate, N-hydroxymethyl acrylamide and vinyl triethoxysilane, emulsifying for 3min in a high-speed dispersion machine to obtain pre-emulsion, and stirring for later use; wherein the molar ratio of the emulsifier water solution, the styrene, the butyl acrylate, the N-hydroxymethyl acrylamide and the vinyl triethoxysilane is 1:1: 1; 1: 1;
the third step: adding deionized water, cationic starch and ammonium persulfate into a 250mL three-neck flask, adjusting the pH value to 9, stirring, heating to 90 ℃, carrying out oxidative degradation for 1h, then cooling to 38 ℃, adjusting the pH value to 3, and adding FeSO4And H2O2Keeping the temperature for 30 min; adding the rest two-thirds of emulsifier water solution, heating to 80 deg.C, and respectively adding the pre-emulsion and H2O2And preserving the heat for 2 hours after the dropwise addition is finished to obtain the modified styrene-acrylic emulsion.
The preparation process of the modified defoaming agent comprises the following steps:
the first step is as follows: adding hydrogen-containing silicone oil, polyether and a catalyst b into a reaction container, mixing, and introducing nitrogen under the conditions of a temperature of 120 ℃ and a rotation speed of 60rpm, so that the reaction is carried out for 30min under the nitrogen atmosphere, thereby obtaining polyether modified organosilicon; wherein the mass ratio of the hydrogen-containing silicone oil to the polyether to the catalyst b is 50:100: 5;
the second step is that: adding dimethyl silicone oil, hydrophobic fumed silica, polyether modified organic silicon and methyl vinyl MQ silicon resin into a reaction container, reacting for 2h at the temperature of 140 ℃ and the rotating speed of 500rpm, and cooling to room temperature to obtain silicon paste; wherein: the molar ratio of the dimethyl silicone oil to the hydrophobic fumed silica to the polyether modified organic silicon to the methyl vinyl MQ silicon resin is 1: 1; 1; 1;
the third step: mixing the silicon paste, the emulsifier and the deionized water, stirring at 80 ℃ for 50min, cooling to room temperature, and performing high-speed shearing treatment to obtain the modified defoaming agent.
Catalyst b is chloroplatinic acid.
The composition is characterized by comprising the following raw materials in parts by weight: 10 parts of modified waterborne polyurethane, 40 parts of modified styrene-acrylic emulsion, 3 parts of modified defoaming agent, 6 parts of thickening agent, 18 parts of quartz powder and 15 parts of deionized water.
Example 2
The production process of the high-molecular interface agent of the grouting type high-molecular binder crack repairing glue comprises the following steps:
the first step is as follows: firstly, modified waterborne polyurethane and deionized water are mixed according to the weight ratio of 12: 16, and stirring for 6min at the temperature of 55 ℃ and the rotation speed of 3100rpm to obtain a first mixture;
the second step is that: and sequentially adding 45 parts of modified styrene-acrylic emulsion, 5 parts of modified defoaming agent, 7 parts of thickening agent and 20 parts of quartz powder into the first mixture, stirring for 55min at the temperature of 93 ℃ and the rotation speed of 3100rpm, and cooling to obtain the high-molecular interface agent.
The preparation process of the modified waterborne polyurethane comprises the following steps:
the first step is as follows: firstly, weighing hexamethylene diisocyanate and polyester polyol subjected to dehydration treatment, adding the hexamethylene diisocyanate and the polyester polyol into a reaction container, then adding 6g of catalyst a, reacting for 65min at the temperature of 82 ℃, and dropwise adding an acetone solvent into the reaction container at a dropping speed of 10 seconds in the reaction process to obtain a first reaction liquid; wherein the molar ratio of the hexamethylene diisocyanate to the polyester polyol is 1: 1.2;
the second step is that: adding fenugreek gum and 2, 2-dihydroxymethyl propionic acid into the first reaction liquid to continue reacting for 65min, simultaneously dropwise adding an acetone solvent into the reaction container at a dropping speed of 10 seconds, then cooling to 48 ℃, adding triethylamine to neutralize and react for 25min, then adding ethylenediamine to chain extend, dropwise adding into the reaction container at a dropping speed of 10 seconds, emulsifying and dispersing with deionized water for 30min, and stopping stirring to obtain a second reaction liquid; the molar ratio of the first reaction liquid to the fenugreek gum to the 2, 2-dihydroxy methyl propionic acid to the triethylamine is 1:1:1: 1.2;
the third step: and distilling the obtained second reaction solution under reduced pressure at the temperature of 43 ℃ and the pressure of-0.01 mpa, and removing the solvent acetone to obtain the modified waterborne polyurethane.
Catalyst a is dibutyltin dilaurate.
The preparation process of the modified styrene-acrylic emulsion comprises the following steps:
the first step is as follows: adding nonylphenol polyoxyethylene ether and sodium dodecyl sulfate into deionized water, and mixing to obtain an emulsifier water solution; wherein the molar ratio of the nonylphenol polyoxyethylene ether to the sodium dodecyl sulfate is 1: 1;
the second step is that: mixing two-thirds of the volume of the emulsifier water solution with styrene, butyl acrylate, N-hydroxymethyl acrylamide and vinyl triethoxysilane, emulsifying for 3min in a high-speed dispersion machine to obtain pre-emulsion, and stirring for later use; wherein the molar ratio of the emulsifier water solution, the styrene, the butyl acrylate, the N-hydroxymethyl acrylamide and the vinyl triethoxysilane is 1:1: 1; 1: 1;
the third step: adding deionized water, cationic starch and ammonium persulfate into a 250mL three-neck flask, adjusting the pH value to 10, stirring, heating to 90 ℃, performing oxidative degradation for 1h, then cooling to 39 ℃, adjusting the pH value to 4, and adding FeSO4And H2O2Keeping the temperature for 30 min; adding the rest two-thirds of emulsifier water solution, heating to 80 deg.C, and respectively adding the pre-emulsion and H2O2And preserving the heat for 2 hours after the dropwise addition is finished to obtain the modified styrene-acrylic emulsion.
The preparation process of the modified defoaming agent comprises the following steps:
the first step is as follows: adding hydrogen-containing silicone oil, polyether and a catalyst b into a reaction container, mixing, and introducing nitrogen under the conditions of 140 ℃ and 70rpm of rotation speed to react for 35min in a nitrogen atmosphere, thereby obtaining polyether modified organosilicon; wherein the mass ratio of the hydrogen-containing silicone oil to the polyether to the catalyst b is 50:100: 5;
the second step is that: adding dimethyl silicone oil, hydrophobic fumed silica, polyether modified organic silicon and methyl vinyl MQ silicon resin into a reaction container, reacting for 2h at the temperature of 145 ℃ and the rotation speed of 550rpm, and cooling to room temperature to obtain silicon paste; wherein: the molar ratio of the dimethyl silicone oil to the hydrophobic fumed silica to the polyether modified organic silicon to the methyl vinyl MQ silicon resin is 1: 1; 1; 1;
the third step: mixing the silicon paste, the emulsifier and the deionized water, stirring at 82 ℃ for 55min, cooling to room temperature, and performing high-speed shearing treatment to obtain the modified defoaming agent.
Catalyst b is chloroplatinic acid.
The composition is characterized by comprising the following raw materials in parts by weight: 12 parts of modified waterborne polyurethane, 45 parts of modified styrene-acrylic emulsion, 5 parts of modified defoaming agent, 7 parts of thickening agent, 20 parts of quartz powder and 16 parts of deionized water.
Example 3
The production process of the high-molecular interface agent of the grouting type high-molecular binder crack repairing glue comprises the following steps:
the first step is as follows: firstly, modified waterborne polyurethane and deionized water are mixed according to the weight ratio of 15: 17, mixing, and stirring for 8min at the temperature of 60 ℃ and the rotating speed of 3200rpm to obtain a first mixture;
the second step is that: and sequentially adding 50 parts of modified styrene-acrylic emulsion, 7 parts of modified defoaming agent, 8 parts of thickening agent and 22 parts of quartz powder into the first mixture, stirring for 50-60min at the temperature of 96 ℃ and the rotating speed of 3200rpm, and cooling to obtain the high-molecular interfacial agent.
The preparation process of the modified waterborne polyurethane comprises the following steps:
the first step is as follows: firstly, weighing hexamethylene diisocyanate and polyester polyol subjected to dehydration treatment, adding the hexamethylene diisocyanate and the polyester polyol into a reaction container, then adding 6g of catalyst a, reacting for 70min at the temperature of 85 ℃, and dropwise adding an acetone solvent into the reaction container at a dropping speed of 10 seconds in the reaction process to obtain a first reaction liquid; wherein the molar ratio of the hexamethylene diisocyanate to the polyester polyol is 1: 1.2;
the second step is that: adding fenugreek gum and 2, 2-dihydroxymethyl propionic acid into the first reaction liquid to continue to react for 70min, simultaneously dropwise adding an acetone solvent into a reaction container at a dropping speed of 10 seconds, then cooling to 50 ℃, adding triethylamine to neutralize and react for 30min, then adding ethylenediamine to chain extend, dropwise adding into the reaction container at a dropping speed of 10 seconds, emulsifying and dispersing with deionized water for 30min, and stopping stirring to obtain a second reaction liquid; the molar ratio of the first reaction liquid to the fenugreek gum to the 2, 2-dihydroxy methyl propionic acid to the triethylamine is 1:1:1: 1.2;
the third step: and carrying out reduced pressure distillation on the obtained second reaction liquid at the temperature of 45 ℃ and under the pressure of-0.01 mpa, and removing the solvent acetone to obtain the modified waterborne polyurethane.
Catalyst a is dibutyltin dilaurate.
The preparation process of the modified styrene-acrylic emulsion comprises the following steps:
the first step is as follows: adding nonylphenol polyoxyethylene ether and sodium dodecyl sulfate into deionized water, and mixing to obtain an emulsifier water solution; wherein the molar ratio of the nonylphenol polyoxyethylene ether to the sodium dodecyl sulfate is 1: 1;
the second step is that: mixing two-thirds of the volume of the emulsifier water solution with styrene, butyl acrylate, N-hydroxymethyl acrylamide and vinyl triethoxysilane, emulsifying for 3min in a high-speed dispersion machine to obtain pre-emulsion, and stirring for later use; wherein the molar ratio of the emulsifier water solution, the styrene, the butyl acrylate, the N-hydroxymethyl acrylamide and the vinyl triethoxysilane is 1:1: 1; 1: 1;
the third step: adding deionized water, cationic starch and ammonium persulfate into a 250mL three-neck flask, adjusting the pH value to 11, stirring, heating to 90 ℃, carrying out oxidative degradation for 1h, then cooling to 40 ℃, adjusting the pH value to 4, adding FeSO4And H2O2Keeping the temperature for 30 min; adding the rest two-thirds of emulsifier water solution, heating to 80 deg.C, and respectively adding the pre-emulsion and H2O2And preserving the heat for 2 hours after the dropwise addition is finished to obtain the modified styrene-acrylic emulsion.
The preparation process of the modified defoaming agent comprises the following steps:
the first step is as follows: adding hydrogen-containing silicone oil, polyether and a catalyst b into a reaction container, mixing, and introducing nitrogen under the conditions of the temperature of 150 ℃ and the rotating speed of 80rpm, so that the reaction is carried out for 40min under the nitrogen atmosphere, thereby obtaining polyether modified organosilicon; wherein the mass ratio of the hydrogen-containing silicone oil to the polyether to the catalyst b is 50:100: 5;
the second step is that: adding dimethyl silicone oil, hydrophobic fumed silica, polyether modified organic silicon and methyl vinyl MQ silicon resin into a reaction container, reacting for 2h at the temperature of 150 ℃ and the rotating speed of 600rpm, and cooling to room temperature to obtain silicon paste; wherein: the molar ratio of the dimethyl silicone oil to the hydrophobic fumed silica to the polyether modified organic silicon to the methyl vinyl MQ silicon resin is 1: 1; 1; 1;
the third step: mixing the silicon paste, the emulsifier and the deionized water, stirring at 85 ℃ for 60min, cooling to room temperature, and performing high-speed shearing treatment to obtain the modified defoaming agent.
Catalyst b is chloroplatinic acid.
The composition is characterized by comprising the following raw materials in parts by weight: 15 parts of modified waterborne polyurethane, 50 parts of modified styrene-acrylic emulsion, 7 parts of modified defoaming agent, 8 parts of thickening agent, 22 parts of quartz powder and 17 parts of deionized water.
The working principle of the invention is as follows: the polymer interfacial agent is composed of the following raw materials in parts by weight: 10-15 parts of modified waterborne polyurethane, 40-50 parts of modified styrene-acrylic emulsion, 3-7 parts of modified defoaming agent, 6-8 parts of thickening agent, 18-22 parts of quartz powder and 15-17 parts of deionized water;
the fenugreek gum is prepared by modifying natural substances, and because the molecules of the fenugreek gum contain hydroxyl structures, the fenugreek gum can generate a crosslinking reaction with the waterborne polyurethane to produce a crosslinked reticular structure, so that the water resistance, the mechanical property and the thermal stability of the waterborne polyurethane are greatly improved, and the high-molecular interface agent also has the water resistance, the mechanical property and the thermal stability in the using process; the problem that the existing waterborne polyurethane emulsion has insufficient water resistance and is one of the most main factors influencing the application of waterborne polyurethane paint in practice is solved; in addition, during engineering construction, certain problems exist in the application of the waterborne polyurethane coating, for example, for a two-component waterborne polyurethane coating, the drying speed is relatively slow after the coating is mixed into construction raw materials, and the coating needs to be maintained for a long time; carbon dioxide bubbles generated in the reaction process of the waterborne polyurethane coating and water may remain in the coating film in a large amount to influence the performance of the coating film; more importantly, in the waterborne polyurethane coating, a large amount of added waterborne coating can affect an iron substrate in an engineering building, so that the problem of flash corrosion is caused, and the wettability and the appearance performance of the surface coating are even affected;
the styrene-acrylic emulsion disclosed by the invention not only has the advantages of good film forming property, strong adhesive force, oxidation resistance and oil resistance, but also has good water resistance, weather resistance, high temperature resistance and tensile strength; so that the polymer interface agent has good water resistance, weather resistance, high temperature resistance and tensile strength; the method solves the problems that in the prior art, styrene-acrylic emulsion is prepared by copolymerizing styrene and acrylate monomers, and the emulsion has the advantages of high cost performance, good film forming property, strong adhesion, oxidation resistance and oil resistance, but the linear main chain structure of a carbon-carbon single bond and a side chain group mainly containing carboxyl ester cause poor water resistance, weather resistance, high temperature resistance and tensile strength;
the modified defoaming agent provided by the invention enables the polyether chain segment to enhance the hydrophilicity of the polyether modified organosilicon, improves the compatibility with other water-soluble substances, can adapt to strong acid, strong alkali and high temperature environments, greatly improves the application range of the defoaming agent, and has the advantage of good foam inhibition performance of the polyether defoaming agent;
therefore, the high molecular interface agent has the advantages of water resistance, thermal stability, water resistance, weather resistance, high temperature resistance and tensile strength.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.