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Polyether-based maleimide copolymer and application thereof in concrete additive

A maleimide-like copolymer technology, applied in the field of polyether-based maleimide-like copolymers and its application in concrete additives, can solve the negative effects of concrete setting time, early and late strength, The plasticizing effect is not good, the water reducing effect is poor, and the plasticizing effect is remarkable, the equipment and reaction conditions are not harsh, and the water reducing efficiency is improved.

Inactive Publication Date: 2020-11-13
HUNAN CHENLI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these additives in the prior art have a single function, and it is necessary to add a large amount of additives of various weights at the same time to obtain concrete with excellent comprehensive properties. However, the addition of a large number of additives will cause a negative impact on the setting time, early and late strength of concrete due to cohesive problems. varying degrees of negative impact
In addition, the additives in the prior art more or less have the defects of poor water-reducing effect, large dosage, poor plasticizing effect, and easy deterioration.

Method used

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  • Polyether-based maleimide copolymer and application thereof in concrete additive
  • Polyether-based maleimide copolymer and application thereof in concrete additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A concrete additive is prepared from the following components in parts by weight: 100 parts of polyether-based maleimide copolymer, 10 parts of sodium alginate and 1 part of modified wollastonite powder.

[0027] The polyether-based maleimide copolymer is composed of polyethylene glycol monoallyl ether, furo[3,4-d]-1,3-dioxole-2,4, 6-triketone, 4,4'-diaminostilbene-2,2'-disulfonic acid, maleimide-tris(ethylene glycol)-propionic acid prepared by free radical polymerization.

[0028] The preparation method of described polyether-based maleimide copolymer comprises the steps of: mixing polyethylene glycol monoallyl ether 10g, furo[3,4-d]-1,3-dioxa Cyclopentene-2,4,6-trione 5g, 4,4'-diaminostilbene-2,2'-disulfonic acid 10g, maleimide-tris(ethylene glycol)-propane Add 10 g of acid and 0.2 g of cumene hydroperoxide to 80 g of dimethyl sulfoxide, stir and react at 60°C for 3 hours under a nitrogen atmosphere, and then remove dimethyl sulfoxide by rotary evaporation to obtain ...

Embodiment 2

[0032] A concrete additive is prepared from the following components in parts by weight: 100 parts of polyether-based maleimide copolymer, 12 parts of sodium alginate and 2 parts of modified wollastonite powder.

[0033] The polyether-based maleimide copolymer is composed of polyethylene glycol monoallyl ether, furo[3,4-d]-1,3-dioxole-2,4, 6-triketone, 4,4'-diaminostilbene-2,2'-disulfonic acid, maleimide-tris(ethylene glycol)-propionic acid prepared by free radical polymerization.

[0034] The preparation method of described polyether-based maleimide copolymer comprises the steps of: mixing polyethylene glycol monoallyl ether 10g, furo[3,4-d]-1,3-dioxa Cyclopentene-2,4,6-trione 5g, 4,4'-diaminostilbene-2,2'-disulfonic acid 10g, maleimide-tris(ethylene glycol)-propane Add 10 g of acid and 0.25 g of cyclohexanone peroxide into 90 g of N,N-dimethylformamide, stir and react at 63°C for 3.5 hours under a helium atmosphere, and then remove N,N-dimethylformamide by rotary evaporatio...

Embodiment 3

[0038] A concrete additive is prepared from the following components in parts by weight: 100 parts of polyether-based maleimide copolymer, 13 parts of sodium alginate and 3 parts of modified wollastonite powder.

[0039]The polyether-based maleimide copolymer is composed of polyethylene glycol monoallyl ether, furo[3,4-d]-1,3-dioxole-2,4, 6-triketone, 4,4'-diaminostilbene-2,2'-disulfonic acid, maleimide-tris(ethylene glycol)-propionic acid prepared by free radical polymerization.

[0040] The preparation method of described polyether-based maleimide copolymer comprises the steps of: mixing polyethylene glycol monoallyl ether 10g, furo[3,4-d]-1,3-dioxa Cyclopentene-2,4,6-trione 5g, 4,4'-diaminostilbene-2,2'-disulfonic acid 10g, maleimide-tris(ethylene glycol)-propane Add 10 g of dicyclohexyl peroxydicarbonate and 0.3 g of N-methylpyrrolidone to 100 g of N-methylpyrrolidone, stir and react at 65 ° C for 4 hours under a neon atmosphere, and then remove N-methylpyrrolidone by rot...

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Abstract

The invention discloses a polyether-based maleimide copolymer. The polyether-based maleimide copolymer is characterized in that the polyether-based maleimide copolymer is prepared from polyethylene glycol monoallyl ether, furo [3, 4-d]-1, 3-dioxolane-2, 4, 6-trione, 4, 4 '-diaminostilbene-2, 2'-disulfonic acid and maleimide-tri (ethylene glycol)-propionic acid through free radical polymerization.The concrete additive prepared from the polyether-based maleimide copolymer can improve the strength, durability and thawing and freezing resistance of concrete, is small in mixing amount and remarkable in plasticizing effect, can obviously increase the slump of the concrete, and is good in adaptability to the concrete.

Description

[0001] This invention is a divisional application of the Chinese patent "a concrete additive and its preparation method". The application date is May 23, 2018, and the application number is 201810503240.1. technical field [0002] The invention relates to the technical field of concrete admixtures, in particular to a polyether-based maleimide copolymer and its application in concrete additives. Background technique [0003] Concrete is one of the most important contemporary civil engineering materials, referred to as "concrete" for short, and is an engineering composite material in which aggregates are cemented into a whole by cementitious materials. The most common concrete is to use cement as the cementitious material, sand and stone as the aggregate; it is mixed with water and additives in a certain proportion, and the cement concrete obtained by mixing is also called ordinary concrete. Among them, the additive is one of the essential ingredients to ensure the excellent w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F234/02C08F212/32C08F222/40C04B24/38C04B24/16C04B20/02C04B14/04
CPCC04B20/023C04B24/165C04B40/0039C08F283/065C08F234/02C08F212/32C08F222/404C04B14/043C04B24/38
Inventor 程业秀
Owner HUNAN CHENLI NEW MATERIAL CO LTD
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