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Polyether macromonomer, preparation method thereof and polycarboxylate superplasticizer prepared from polyether macromonomer

A technology of polyether macromonomer and water reducer, which is applied in the field of polyether macromonomer and its preparation, polycarboxylate water reducer and water reducer, and can solve problems such as high viscosity of concrete and concrete pipe plugging

Inactive Publication Date: 2019-04-26
联泓(江苏)新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the polycarboxylate superplasticizer, which is widely used in commercial concrete, is often blocked when the mixed concrete is pumped on site due to the deterioration of sand and gravel materials, which brings great problems to the construction; in addition, it is used in many other construction fields. There are also many construction problems caused by the high viscosity of concrete. For example, the workers in the sleeper field need the concrete to be soft and easy to construct. However, only the viscosity-reducing performance cannot meet the needs of customers. It still needs to have a certain concrete retention capacity, leaving enough construction space for workers. time

Method used

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  • Polyether macromonomer, preparation method thereof and polycarboxylate superplasticizer prepared from polyether macromonomer
  • Polyether macromonomer, preparation method thereof and polycarboxylate superplasticizer prepared from polyether macromonomer
  • Polyether macromonomer, preparation method thereof and polycarboxylate superplasticizer prepared from polyether macromonomer

Examples

Experimental program
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Effect test

Embodiment 1

[0069] Under the protection of an inert gas, mix 10 parts by weight of the raw material alcohol 2-ethyleneoxyethanol and a stage of catalyst KOH at a temperature of 105 ° C, and then add 50 parts by weight of the first part of ethylene oxide under a pressure of 0.1-0.4 MPa. Mature the first reaction mixture at a temperature of 105°C to obtain an intermediate product; under an inert gas atmosphere, mix the second-stage catalyst KOH and the intermediate at a temperature of 110°C, and add the second part at a pressure of 0.1-0.4MPa 100 parts by weight of ethylene oxide, matured at a temperature of 115°C until the pressure no longer drops; take 240 parts by weight of the unsaturated ether sample and cool it down to 70°C, and test that the moisture content is lower than 0.3%. Slowly add 6.07 parts by weight of m-toluene isocyanate at a medium and uniform speed, control the reaction temperature at about 70°C, add dropwise for 60 minutes, keep warm for 3 hours after dropping, and vacu...

Embodiment 2

[0073] Under the protection of an inert gas, mix 10 parts by weight of the raw material alcohol 2-ethyleneoxyethanol with a catalyst KOH at a temperature of 105 ° C, and then add the first part of 50 parts by weight of ethylene oxide under a pressure of 0.1-0.4 MPa. Mature the first reaction mixture at a temperature of 105°C to obtain an intermediate product; under an inert gas atmosphere, mix the second-stage catalyst KOH and the intermediate at a temperature of 110°C, and add the second part at a pressure of 0.1-0.4MPa 80 parts by weight of ethylene oxide, aged at a temperature of 115 ° C until the pressure no longer drops; take 240 parts by weight of the unsaturated ether sample and cool it down to 70 ° C, and test that the moisture content is lower than 0.3%. Slowly add 6.87 parts by weight of m-toluene isocyanate at a medium and uniform speed, control the reaction temperature at about 70°C, add dropwise for 60 minutes, keep warm for 3 hours after dropping, and vacuumize an...

Embodiment 3

[0077]Under the protection of an inert gas, mix 10 parts by weight of raw material alcohol 2-ethyleneoxyethanol and a catalyst NaOH at a temperature of 105 ° C, and then add 50 parts by weight of the first part of ethylene oxide under a pressure of 0.1-0.4 MPa, The first reaction mixture is matured at a temperature of ℃ to obtain an intermediate product; under an inert gas atmosphere, the second-stage catalyst NaOH and the intermediate are mixed at a temperature of 110°C, and the second part of the ring is added under a pressure of 0.1-0.4MPa 100 parts by weight of oxyethane, aged at a temperature of 115 ° C until the pressure no longer drops; take 240 parts by weight of the unsaturated ether sample and cool it down to 70 ° C, and test that the moisture content is lower than 0.3%, then pour it into the reactor under the protection of nitrogen. Slowly add 6.07 parts by weight of benzyl isocyanate at a uniform speed, control the reaction temperature at about 70°C, add dropwise fo...

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Abstract

The invention discloses a polyether macromonomer, a preparation method thereof and a polycarboxylate superplasticizer prepared from the polyether macromonomer. An unsaturated active hydrogen compound,such as unsaturated alcohol, is used as an initiator for alkane oxidation, end capping is conducted, a viscosity reducing monomer with high slump retaining property is obtained, and the correspondingpolycarboxylate superplasticizer is developed on the basis of the viscosity reducing monomer. The superplasticizer has better slump retaining property than conventional viscosity reducing polycarboxylate superplasticizers; in the polymerization synthesis process of the superplasticizer, the acid-ether ratio tolerance is high, and a higher water reducing rate is obtained on the premise of extremely low acid consumption; the synthesis process is simple and efficient, easy to control, safe, environmentally friendly and pollution-free; viscosity reducing performance of the product is better thanthat of commercially available high-performance polycarboxylate superplasticizers, the superplasticizer also has outstanding retention performance and concrete workability, and has obvious market application prospect.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, relates to a polyether macromonomer and a preparation method thereof, and also relates to a polycarboxylate water reducer prepared from the polyether macromonomer and a preparation method and application of the water reducer. Background technique [0002] As the fifth component of modern concrete, polycarboxylate superplasticizer has been widely used in the field of concrete engineering technology due to its excellent low dosage, high slump retention, and large degree of freedom in molecular design. At present, the polycarboxylate superplasticizer, which is widely used in commercial concrete, is often blocked when the mixed concrete is pumped on site due to the deterioration of sand and gravel materials, which brings great problems to the construction; in addition, it is used in many other construction fields. There are also many construction problems caused by the high viscosity of c...

Claims

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Application Information

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IPC IPC(8): C08G65/333C08G65/28C04B24/32C04B103/30
CPCC04B24/32C04B2103/302C08G65/2609C08G65/33358
Inventor 张俊李华威赵余徉牛峰李磊李方
Owner 联泓(江苏)新材料研究院有限公司
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