A kind of starch-modified polycarboxylic acid macromonomer and preparation method thereof

A technology of starch modification and polycarboxylate, which is applied in the field of polycarboxylate macromonomers, can solve the problems of low comprehensive cost performance of polycarboxylate macromonomers, and achieves benefits for construction operations, good slump protection effect, and strong adaptability Effect

Active Publication Date: 2022-02-01
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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Examples

Experimental program
Comparison scheme
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 (the addition number of ethylene oxide is 30), increase the temperature to 125°C, increase the vacuum to -0.098Mpa, and maintain it for 2 hours. Propylene glycol is recovered. 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 duri...

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 (the addition number of ethylene oxide is 30), increase the temperature to 125°C, increase the vacuum to -0.098Mpa, and maintain it for 2 hours. Propylene glycol is recovered. Return the pressure in the kettle 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 t...

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, increase the vacuum to -0.098Mpa, and maintain it for 2 hours. Propylene glycol is recovered. Return the pressure in the kettle 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 duri...

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PUM

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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 an oligosaccharide segment, the oligosaccharide segment is then connected with a polyoxyethylene segment and a polypeptide segment. The product of polycarboxylic acid macromonomer contains oligosaccharide chain segment, polyoxyethylene chain segment and polypeptide chain segment of plant protein hydrolyzate in the molecular structure at the same time. The starch-modified polycarboxylate macromonomer of the present invention has good adaptability to cement, and strong adaptability to sand and gravel materials, especially in the case of machine-made sand; it has good slump retention effect and prolongs the construction time of concrete; it has good workability ; The dosage sensitivity is reduced, which is more conducive to construction operations; the cost is low, and the product has great economic advantages and good cost performance.

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 Patents(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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