阅读说明：本技术 一种高性能粘度改性剂及其制备方法 (High-performance viscosity modifier and preparation method thereof ) 是由 黄鸣剑 于 2020-12-24 设计创作，主要内容包括：本申请公开了一种高性能粘度改性剂及其制备方法,其材料成分组成按重量份计为：37-75份丙烯酸聚合物、80-90份三乙醇胺、3-5份聚丙烯酸钠、0.1-0.55份消泡剂、1-3份引发剂、8-20份pH调节剂、1-7份乙二酸四乙酸钠、5-10份聚氧化乙烯以及500-1000份去离子水,从而使得生产出来的混凝土具有良好的抗压强度、抗渗性、坍落度、消泡效果好、耐磨、耐冻以及使用寿命长的特点,能够有效的控制泌水,改善混凝土和易性,使混凝土生产易于控制。(The application discloses a high-performance viscosity modifier and a preparation method thereof, and the high-performance viscosity modifier comprises the following material components in parts by weight: 37-75 parts of acrylic polymer, 80-90 parts of triethanolamine, 3-5 parts of sodium polyacrylate, 0.1-0.55 part of defoaming agent, 1-3 parts of initiator, 8-20 parts of pH regulator, 1-7 parts of sodium diacetate, 5-10 parts of polyethylene oxide and 500 parts of deionized water, so that the produced concrete has the characteristics of good compressive strength, impermeability, slump, good defoaming effect, wear resistance, freezing resistance and long service life, bleeding can be effectively controlled, the workability of the concrete is improved, and the production of the concrete is easy to control.)

1. A high performance viscosity modifier characterized by: the material comprises the following components in parts by weight: 37-75 parts of acrylic polymer, 80-90 parts of triethanolamine, 3-5 parts of sodium polyacrylate, 0.1-0.55 part of defoaming agent, 1-3 parts of initiator, 8-20 parts of pH regulator, 1-7 parts of sodium diacetate, 5-10 parts of polyethylene oxide and 500-1000 parts of deionized water.

2. The high performance viscosity modifier of claim 1, wherein: the defoaming agent is prepared by mixing polyether modified silicone oil, sodium carboxymethylcellulose, an emulsifier and deionized water.

3. The high performance viscosity modifier of claim 2, wherein: the initiator is one or more of ammonium persulfate, benzoyl peroxide, azodiisobutyronitrile, hydrogen peroxide and sodium persulfate.

4. The high performance viscosity modifier of claim 3, wherein: the polyether modified silicone oil is prepared by mixing methyl hydrogen-containing silicone oil, F-6 type unsaturated polyether, vinyl glycol ether and a catalyst.

5. The high performance viscosity modifier of claim 4, wherein: the mixing ratio of the methyl hydrogen-containing silicone oil, the F-6 type unsaturated polyether, the vinyl glycol ether and the catalyst is 78:90:20: 3.

6. The high performance viscosity modifier of claim 5, wherein: the catalyst is chloroplatinic acid-isopropanol.

7. The high performance viscosity modifier of claim 6, wherein: the pH regulator is caustic soda flakes.

8. The high performance viscosity modifier of claim 7, wherein: the acrylic polymer is copolymerized by butenedioic acid, methacrylic acid and butyl acrylate, and the mixing ratio of the butenedioic acid, the methacrylic acid and the butyl acrylate is 2:9: 9.

9. The method of preparing the high performance viscosity modifier of any one of claims 1 to 8, comprising the steps of:

s100, sequentially adding acrylic polymer, triethanolamine, sodium polyacrylate, an initiator, sodium diacetate and deionized water in corresponding parts by weight into a mixer, and mixing and stirring at 90-120 ℃ for 5-20min for later use;

s200, adding a pH regulator into the step S100, stirring while dripping, and regulating the pH value to be 7-8 for later use;

s300, sequentially adding polyoxyethylene and a defoaming agent into the step S200, uniformly mixing at the speed of 1000-1500r/min, and then placing the mixture in a dryer to dry at the temperature of 110 ℃ to obtain the high-performance viscosity modifier.

10. The method of preparing a high performance viscosity modifier according to claim 9, wherein: the defoaming agent in the step S300 is prepared by the following preparation method:

s311, shearing the polyether modified silicone oil and the emulsifier for 40min at normal temperature to obtain an intermediate for later use;

s312, sequentially adding sodium carboxymethylcellulose and deionized water into the intermediate prepared in the step S311 to prepare an emulsion with the concentration of 30%, and stirring at 1000r/min for 15min for later use;

the polyether modified silicone oil in the step S311 is prepared by the following preparation method:

s321, heating methyl hydrogen-containing silicone oil, F-6 type unsaturated polyether and vinyl glycol to 120 ℃ under the condition of introducing nitrogen, and mixing and stirring to obtain an intermediate;

s322, adding a catalyst into the intermediate in the step S321, reacting at a constant temperature for 4.5 hours, and cooling to 40 ℃ after the reaction is finished to obtain the polyether modified silicone oil for later use.

Technical Field

The application relates to the technical field of concrete modifiers, in particular to a high-performance viscosity modifier.

Background

Concrete is the most widely applied building material in the field of construction, and the demand for concrete is continuously rising along with the continuous enhancement of the construction strength in China. The concrete produced in the prior art has poor cohesiveness, so that the produced concrete can be gradually reduced along with the prolonging of the standing time, and the modifier for producing the concrete in the prior art has poor compatibility with a water reducing agent, so that the stability of the produced concrete is poor, and for common C25 and C30 concrete, due to the fact that the long dosage is low, the conditions of stone accumulation, slurry bleeding and water bleeding are very easy to occur if the grading is not ideal, the production difficulty is increased, and the better concrete is difficult to produce.

Disclosure of Invention

In order to overcome the defects of the prior art, the application aims to provide a high-performance viscosity modifier which has good compatibility with the modifier and can improve the stability and strength of concrete.

Another object of the present application is to provide a high performance viscosity modifier, which can have good compressive strength and defoaming effect, and is favorable for compaction of the road surface, thereby improving compactness and compressive strength of the road surface.

Another object of this application is to provide a high performance viscosity modifier, can effectually eliminate the harmful bubble in the concrete, improves concrete strength and slump retentivity, avoids phenomena such as concrete hardening appearance honeycomb, pitted skin.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: a high-performance viscosity modifier comprises the following material components in parts by weight: 37-75 parts of acrylic polymer, 80-90 parts of triethanolamine, 3-5 parts of sodium polyacrylate, 0.1-0.55 part of defoaming agent, 1-3 parts of initiator, 8-20 parts of pH regulator, 1-7 parts of sodium diacetate, 5-10 parts of polyethylene oxide and 500-1000 parts of deionized water.

Further, the defoaming agent is prepared by mixing polyether modified silicone oil, sodium carboxymethyl cellulose, an emulsifier and deionized water.

Further, the initiator is one or more of ammonium persulfate, benzoyl peroxide, azobisisobutyronitrile, hydrogen peroxide and sodium persulfate.

Further, the polyether modified silicone oil is prepared by mixing methyl hydrogen-containing silicone oil, F-6 type unsaturated polyether, vinyl glycol ether and a catalyst.

Further, the mixing ratio of the methyl hydrogen-containing silicone oil, the F-6 type unsaturated polyether, the vinyl glycol ether and the catalyst is 78:90:20: 3.

Further, the catalyst is chloroplatinic acid-isopropanol.

Further, the pH regulator is caustic soda flakes.

Further, the acrylic polymer is copolymerized by butenedioic acid, methacrylic acid and butyl acrylate, and the mixing ratio of the butenedioic acid, the methacrylic acid and the butyl acrylate is 2:9: 9.

A preparation method of a high-performance viscosity modifier comprises the following steps:

s100, sequentially adding acrylic polymer, triethanolamine, sodium polyacrylate, an initiator, sodium diacetate and deionized water in corresponding parts by weight into a mixer, and mixing and stirring at 90-120 ℃ for 5-20min for later use;

s200, adding a pH regulator into the step S100, stirring while dripping, and regulating the pH value to be 7-8 for later use;

s300, sequentially adding polyoxyethylene and a defoaming agent into the step S200, uniformly mixing at the speed of 1000-1500r/min, and then placing the mixture in a dryer to dry at the temperature of 110 ℃ to obtain the high-performance viscosity modifier.

Further, the defoaming agent is prepared by the following preparation method:

s311, shearing the polyether modified silicone oil and the emulsifier for 40min at normal temperature to obtain an intermediate for later use;

s312, sequentially adding sodium carboxymethylcellulose and deionized water into the intermediate prepared in the step S311 to prepare an emulsion with the concentration of 30%, and stirring at 1000r/min for 15min for later use;

further, the polyether modified silicone oil is prepared by the following preparation method:

s321, heating methyl hydrogen-containing silicone oil, F-6 type unsaturated polyether and vinyl glycol to 120 ℃ under the condition of introducing nitrogen, and mixing and stirring to obtain an intermediate;

s322, adding a catalyst into the intermediate in the step S321, reacting at a constant temperature for 4.5 hours, and cooling to 40 ℃ after the reaction is finished to obtain the polyether modified silicone oil for later use.

Compared with the prior art, the beneficial effect of this application lies in:

(1) the modifier can effectively improve the workability of concrete by improving the molecular structure to adsorb excessive moisture and forming a spatial three-dimensional network structure, has good compatibility with the polycarboxylate superplasticizer, can effectively reduce the sensitivity of the polycarboxylate superplasticizer to concrete raw materials, water consumption and mixing amount, and can reduce the working difficulty of concrete enterprises for production and quality control personnel;

(2) bleeding can be effectively controlled, the workability of concrete is improved, and the production of the concrete is easy to control;

(3) the sodium polyacrylate can be ionized due to the carboxylate radical ions with negative charges and neutralized with the positive charges at the outer edge of the clay to reach permanent balance, so that the clay is changed from hydrophilicity to hydrophobicity, and a complex reaction is generated to produce a complex insoluble in water, so that the sodium polyacrylate has viscosity and lubricity at the initial reaction stage, and is favorable for compacting the pavement, thereby improving the compactness and compressive strength of the pavement.

(4) The defoaming agent has strong foam inhibiting and defoaming capability, can inhibit the generation of bubbles and quickly break the bubbles, can effectively eliminate harmful bubbles in concrete, improves the strength and slump retaining performance of the concrete, and avoids the phenomena of honeycombs, pitted surfaces and the like caused by the hardening of the concrete.

(5) The acrylic acid polymer can improve the performances of skid resistance, wear resistance, aging resistance, impact resistance and freeze-thaw resistance of the concrete pavement and prolong the service life of the concrete pavement.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it is to be understood that the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the present application, and are only for the convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

A method for preparing a high performance viscosity modifier comprising the steps of:

s100, sequentially adding acrylic polymer, triethanolamine, sodium polyacrylate, an initiator, sodium diacetate and deionized water in corresponding parts by weight into a mixer, and mixing and stirring at 90-120 ℃ for 5-20min for later use;

s200, adding a pH regulator into the step S100, stirring while dripping, and regulating the pH value to be 7-8 for later use;

s300, sequentially adding polyoxyethylene and a defoaming agent into the step S200, uniformly mixing at the speed of 1000-1500r/min, and then placing the mixture in a dryer to dry at the temperature of 110 ℃ to obtain the high-performance viscosity modifier.

The preparation method of the defoaming agent comprises the following steps:

(1) shearing polyether modified silicone oil and an emulsifier for 40min at normal temperature to obtain an intermediate for later use;

s312, sequentially adding sodium carboxymethylcellulose and deionized water into the intermediate prepared in the step (1) to prepare an emulsion with the concentration of 30%, and stirring at 1000r/min for 15min for later use;

the preparation method of the polyether modified silicone oil comprises the following steps:

s321, heating methyl hydrogen-containing silicone oil, F-6 type unsaturated polyether and vinyl glycol to 120 ℃ under the condition of introducing nitrogen, and mixing and stirring to obtain an intermediate;

s322, adding a catalyst into the intermediate in the step S321, reacting at a constant temperature for 4.5 hours, and cooling to 40 ℃ after the reaction is finished to obtain the polyether modified silicone oil for later use.

Example 1

The preparation method of the high-performance viscosity modifier comprises the following steps:

(1) adding 37 parts by weight of acrylic polymer, 80 parts by weight of triethanolamine, 3 parts by weight of sodium polyacrylate, 1 part by weight of azobisisobutyronitrile, 1 part by weight of sodium diacetate and 500 parts by weight of deionized water into a mixer in sequence, and mixing and stirring for 20min at 90 ℃ for later use;

(2) adding 8 parts by weight of caustic soda flakes into the step (1), stirring while dripping, and adjusting the pH value to 7 for later use;

(3) and (3) sequentially adding polyoxyethylene and a defoaming agent into the step (3), uniformly mixing at 1000r/min, and then placing in a dryer to dry at 90 ℃ to obtain the high-performance viscosity modifier.

The specific preparation method of the defoaming agent comprises the following steps:

(1) shearing 100 parts by weight of polyether modified silicone oil and 37 parts by weight of emulsifier for 40min at normal temperature to obtain an intermediate for later use;

(2) sequentially adding 18 parts by weight of sodium carboxymethylcellulose and 280 parts by weight of deionized water into the intermediate prepared in the step (2) to prepare an emulsion with the concentration of 30%, and stirring at 1000r/min for 15min for later use;

the specific preparation method of the polyether modified silicone oil comprises the following steps:

(1) heating 78 parts by weight of methyl hydrogen-containing silicone oil, 90 parts by weight of F-6 type unsaturated polyether and 20 parts by weight of vinyl glycol to 120 ℃ under the condition of introducing nitrogen, and mixing and stirring to obtain an intermediate;

(2) and (2) adding 3 parts by weight of catalyst into the intermediate in the step (1), reacting for 4.5 hours at constant temperature, and cooling to 40 ℃ after the reaction is finished to obtain the polyether modified silicone oil for later use.

Example 2

The preparation method of the high-performance viscosity modifier comprises the following steps:

(1) sequentially adding 50 parts by weight of acrylic polymer, 76 parts by weight of triethanolamine, 4 parts by weight of sodium polyacrylate, 2 parts by weight of azobisisobutyronitrile, 3 parts by weight of sodium diacetate and 844.7 parts by weight of deionized water into a mixer, and mixing and stirring at 105 ℃ for 15min for later use;

(2) adding 12 parts by weight of caustic soda flakes into the step (1), stirring while dripping, and adjusting the pH value to 7.4 for later use;

(3) and (3) sequentially adding 8 parts by weight of polyethylene oxide and 0.3 part by weight of defoaming agent into the step (3), uniformly mixing at 1200r/min, and then placing in a dryer for drying at 110 ℃ to obtain the high-performance viscosity modifier.

The specific preparation method of the defoaming agent comprises the following steps:

(1) shearing 120 parts by weight of polyether modified silicone oil and 44 parts by weight of emulsifier for 40min at normal temperature to obtain an intermediate for later use;

(2) sequentially adding 21 parts by weight of sodium carboxymethylcellulose and 305 parts by weight of deionized water into the intermediate prepared in the step (2) to prepare an emulsion with the concentration of 30%, and stirring at 1000r/min for 15min for later use;

the specific preparation method of the polyether modified silicone oil comprises the following steps:

(1) heating 78 parts by weight of methyl hydrogen-containing silicone oil, 90 parts by weight of F-6 type unsaturated polyether and 20 parts by weight of vinyl glycol to 120 ℃ under the condition of introducing nitrogen, and mixing and stirring to obtain an intermediate;

(2) and (2) adding 3 parts by weight of catalyst into the intermediate in the step (1), reacting for 4.5 hours at constant temperature, and cooling to 40 ℃ after the reaction is finished to obtain the polyether modified silicone oil for later use.

Example 3

The preparation method of the high-performance viscosity modifier comprises the following steps:

(1) adding 75 parts by weight of acrylic polymer, 90 parts by weight of triethanolamine, 5 parts by weight of sodium polyacrylate, 3 parts by weight of azobisisobutyronitrile, 7 parts by weight of sodium diacetate and 1000 parts by weight of deionized water into a mixer in sequence, and mixing and stirring for 5min at 120 ℃ for later use;

(2) adding 20 parts by weight of caustic soda flakes into the step (1), stirring while dripping, and adjusting the pH value to 7.6 for later use;

(3) and (3) sequentially adding 10 parts by weight of polyethylene oxide and 0.55 part by weight of defoaming agent into the step (3), uniformly mixing at 1500r/min, and then placing in a dryer for drying at 110 ℃ to obtain the high-performance viscosity modifier.

The specific preparation method of the defoaming agent comprises the following steps:

(1) shearing 120 parts by weight of polyether modified silicone oil and 44 parts by weight of emulsifier for 40min at normal temperature to obtain an intermediate for later use;

(2) sequentially adding 21 parts by weight of sodium carboxymethylcellulose and 305 parts by weight of deionized water into the intermediate prepared in the step (2) to prepare an emulsion with the concentration of 30%, and stirring at 1000r/min for 15min for later use;

the specific preparation method of the polyether modified silicone oil comprises the following steps:

(1) heating 78 parts by weight of methyl hydrogen-containing silicone oil, 90 parts by weight of F-6 type unsaturated polyether and 20 parts by weight of vinyl glycol to 120 ℃ under the condition of introducing nitrogen, and mixing and stirring to obtain an intermediate;

(2) and (2) adding 3 parts by weight of catalyst into the intermediate in the step (1), reacting for 4.5 hours at constant temperature, and cooling to 40 ℃ after the reaction is finished to obtain the polyether modified silicone oil for later use.

Example 4

The preparation method of the high-performance viscosity modifier comprises the following steps:

(1) adding 75 parts by weight of acrylic polymer, 90 parts by weight of triethanolamine, 5 parts by weight of sodium polyacrylate, 3 parts by weight of azobisisobutyronitrile, 7 parts by weight of sodium diacetate and 1000 parts by weight of deionized water into a mixer in sequence, and mixing and stirring for 5min at 120 ℃ for later use;

(2) adding 20 parts by weight of caustic soda flakes into the step (1), stirring while dripping, and adjusting the pH value to 7.6 for later use;

(3) and (3) sequentially adding 10 parts by weight of polyethylene oxide and 0.55 part by weight of defoaming agent into the step (3), uniformly mixing at 1500r/min, and then placing in a dryer for drying at 110 ℃ to obtain the high-performance viscosity modifier.

The specific preparation method of the defoaming agent comprises the following steps:

(1) shearing 120 parts by weight of polyether modified silicone oil and 37 parts by weight of emulsifier for 40min at normal temperature to obtain an intermediate for later use;

(2) sequentially adding 18 parts by weight of sodium carboxymethylcellulose and 280 parts by weight of deionized water into the intermediate prepared in the step (2) to prepare an emulsion with the concentration of 30%, and stirring at 1000r/min for 15min for later use;

the specific preparation method of the polyether modified silicone oil comprises the following steps:

(1) heating 78 parts by weight of methyl hydrogen-containing silicone oil, 90 parts by weight of F-6 type unsaturated polyether and 20 parts by weight of vinyl glycol to 120 ℃ under the condition of introducing nitrogen, and mixing and stirring to obtain an intermediate;

(2) and (2) adding 3 parts by weight of catalyst into the intermediate in the step (1), reacting for 4.5 hours at constant temperature, and cooling to 40 ℃ after the reaction is finished to obtain the polyether modified silicone oil for later use.

Example 5

The high performance viscosity modifier was prepared as in example 2 except that the initiator was ammonium persulfate.

Example 6

The preparation method of the high-performance viscosity modifier is the same as that of example 2, except that the initiator is formed by mixing 95% of ammonium persulfate and 5% of hydrogen peroxide.

Example 7

The high performance viscosity modifier was prepared as in example 2 except that the initiator was benzoyl peroxide.

Example 8

The high performance viscosity modifier was prepared as in example 2 except that no initiator was added.

Example 9

The high performance viscosity modifier was prepared as in example 2 except that no defoamer was added.

Comparative example

The preparation method of the conventional modifier comprises the following steps: sequentially adding 35 parts by weight of tribasic lead sulfate, 43 parts by weight of acetate fiber, 26 parts by weight of polyoxyethylene abietate, 20 parts by weight of sodium poly (methylene naphthalene sulfonate) and 80 parts by weight of deionized water into a mixer, and mixing and stirring at 120 ℃ for 5min for later use;

(2) adding 7 parts by weight of zinc hydroxide into the step (1), stirring while dripping, and adjusting the pH value to 7.6 for later use;

(3) and (3) sequentially adding 15 parts by weight of sodium methyl silicate and 30 parts by weight of artificial ceramic particles into the step (3), uniformly mixing at 1500r/min, and then placing in a dryer to dry at 110 ℃ to obtain the ceramic material.

Performance testing

The modifiers of the examples 1 to 9 and the comparative example are respectively adopted, the cement, the sand, the aggregate and the like are uniformly mixed with water according to the dosage of the modifier which is 20 percent of the weight of the doped cement and the same preparation process, then the modifiers of the examples 1 to 9 and the comparative group are respectively added into the cement mortar which is stirred in advance, concrete mortar is respectively prepared, and the performance test is carried out.

The results of the performance tests of the modifiers of examples 1-9 and the control are shown in Table 1.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.