Starch-modified polycarboxylic acid macromonomer and preparation method thereof

A starch modification and polycarboxylic acid technology, which is applied in the field of polycarboxylic acid macromonomers, can solve the problems of low comprehensive cost performance of polycarboxylic acid macromonomers, and achieves favorable construction operation, strong adaptability and good adaptability. Effect

Active Publication Date: 2020-09-11
内蒙古际丰建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved in the present invention is to provide a starch-modified polycarboxylate macromonomer to solve the problem of low comprehensive cost performance of existing polycarboxylate macromonomers

Method used

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  • Starch-modified polycarboxylic acid macromonomer and preparation method thereof
  • Starch-modified polycarboxylic acid macromonomer and preparation method thereof
  • Starch-modified polycarboxylic acid macromonomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028]Add 30 parts of propylene glycol and 0.2 parts of catalyst succinic acid to 100 parts of corn starch, stir under normal pressure, raise the temperature to 90°C, continue stirring for 2 hours, increase the temperature to 100°C, add 4 parts of methallyl alcohol polyoxyethylene in batches Ether (addition number of ethylene oxide is 8), vacuumize to -0.085Mpa, add 3 parts of methallyl alcohol polyoxyethylene ether (addition number of ethylene oxide is 16) after 1 hour, the temperature is raised to 110°C, after another 1.5 hours, add 6 parts of isopentenol polyoxyethylene ether (addition number of ethylene oxide is 30), increase the temperature to 125°C, really increase to -0.098Mpa, maintain for 2 hours, and recover at the same time propylene glycol. Return the pressure in the kettle to normal pressure, add 1 part of monochloroacetic acid, carry out the esterification reaction for 2.5 hours, the temperature is controlled at 125 ° C, and the by-product water is evaporated dur...

Embodiment 2

[0033] Add 25 parts of propylene glycol and 0.5 parts of catalyst succinic acid to 100 parts of corn starch, stir under normal pressure, raise the temperature to 90°C, continue stirring for 2 hours, raise the temperature to 95°C, add 6 parts of methallyl alcohol polyoxyethylene in batches Ether (addition number of ethylene oxide is 8), vacuumize to -0.085Mpa, add 4 parts of methallyl alcohol polyoxyethylene ether (addition number of ethylene oxide is 16) after 1 hour, the temperature is raised to 110°C, after another 1.5 hours, add 6 parts of isopentenol polyoxyethylene ether (addition number of ethylene oxide is 30), increase the temperature to 125°C, really increase to -0.098Mpa, maintain for 2 hours, and recover at the same time propylene glycol. Return the pressure in the still to normal pressure, add 2 parts of monochloroacetic acid, carry out the esterification reaction for 2.5 hours, the temperature is controlled at 125 ° C, and the by-product water is evaporated during...

Embodiment 3

[0038] Add 30 parts of propylene glycol and 0.5 parts of catalyst succinic acid to 100 parts of corn starch, stir under normal pressure, raise the temperature to 90°C, continue stirring for 2 hours, increase the temperature to 100°C, add 4 parts of methallyl alcohol polyoxyethylene in batches Ether (addition number of ethylene oxide is 8), vacuumize to -0.085Mpa, add 6 parts of methallyl alcohol polyoxyethylene ether (addition number of ethylene oxide is 16) after 1 hour, the temperature is raised to 110°C, after another 1.5 hours, add 3 parts of isopentenol polyoxyethylene ether (the addition number of ethylene oxide is 30), increase the temperature to 120°C, and really increase it to -0.098Mpa, keep it for 2 hours, and recover at the same time propylene glycol. Return the pressure in the still to normal pressure, add 2 parts of monochloroacetic acid, carry out the esterification reaction for 2.5 hours, the temperature is controlled at 125 ° C, and the by-product water is eva...

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Abstract

The invention discloses a starch-modified polycarboxylic acid macromonomer and a preparation method thereof. After starch is degraded to generate oligosaccharide chain segments, products of polyoxyethylene chain segments and polypeptide chain segments are connected to the oligosaccharide chain segments, and the molecular structure of the polycarboxylic acid macromonomer contains the oligosaccharide chain segments, the polyoxyethylene chain segments and the polypeptide chain segments of vegetable protein hydrolysate at the same time. The starch-modified polycarboxylic acid macromonomer providedby the invention has good adaptability to cement and strong adaptability to sandstone materials, especially under the condition of machine-made sand; the slump retaining effect is good, and the construction time of concrete is prolonged; the concrete workability is good; the mixing amount sensitivity is reduced, and the construction operation is facilitated; the cost is low, the economic advantage is great, and the product cost performance is good.

Description

technical field [0001] The invention relates to a polycarboxylic acid macromonomer, in particular to a starch-modified polycarboxylic acid macromonomer and a preparation method thereof. Background technique [0002] Water reducer is an important concrete admixture and an essential part of cement concrete. In recent years, high-performance concrete using water reducing agents has played an important role in engineering construction in my country. The earliest water-reducing agent used in my country was lignosulfonate, which was an admixture with low water-reducing rate. Later, a naphthalene-based water-reducing agent with a medium water-reducing rate was developed to become the main body of the water-reducing agent, and as an auxiliary The components are aliphatic and sulfamate-based water-reducers used to improve the performance of naphthalene-based water-reducers. Due to the lack of performance of the above-mentioned water reducer and the existing environmental pollution p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08B30/12C04B24/38C04B24/28C04B24/32
CPCC08G81/00C08B30/12C04B24/38C04B24/28C04B24/32
Inventor 刘宁张连墨郭小乔杨华
Owner 内蒙古际丰建材有限公司
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