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Unsaturated ethylenic polyether monomer for concrete water reducer and preparation method thereof

A technology of concrete water reducing agent and alkenyl polyether, which is applied in the field of building materials, can solve the problems of affecting product application performance, many side reactions, and low double bond retention rate, so as to avoid broadening of product molecular weight distribution and improve application effect , to avoid the effect of product performance degradation

Active Publication Date: 2016-06-08
KZJ NEW MATERIALS GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem in the production process is that there are many side reactions and low double bond retention rate, which affects the application performance of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Add 8 to 50 parts by weight of acetylenic alcohol and 0.01 to 0.22 parts by weight of a basic catalyst in the reactor, and react under a nitrogen atmosphere, the reaction temperature is 30 to 90 ° C, and the reaction time is 0.5 to 3.5 hours;

[0033] (2) Continue to heat up to 90-130°C with a heating rate of 0.5-2.0°C / min, and then continuously feed 45-210 parts by weight of ethylene oxide and / or propylene oxide into the reactor to maintain the temperature of the reactor. The pressure inside is 0.4~0.6MPa, continue to react for 4~10h after feeding, and then lower the temperature to 40~60℃, the cooling rate is 0.2~2.5℃ / min;

[0034] (3) Continue to add 0.01 to 0.22 parts by weight of the basic catalyst to the reactor, raise it to 90 to 130°C at a rate of 0.5 to 2.0°C / min, and react under a nitrogen atmosphere, and continuously feed 800 ~950 parts by weight of ethylene oxide and / or propylene oxide, to maintain the pressure in the reactor is 0.4 ~ 0.6MPa, continue to ...

Embodiment 2

[0038](1) Add 10 parts by weight of 2-propyn-1-alcohol and 0.05 parts by weight of sodium metal to the reactor, and react under a nitrogen atmosphere with a reaction temperature of 50°C and a reaction time of 3 hours;

[0039] (2) Continue to heat up to 90°C with a heating rate of 0.2°C / min, then continuously feed 50 parts by weight of ethylene oxide into the reactor to maintain the pressure in the reactor at 0.4MPa, and continue to React for 4 hours, then lower the temperature to 60°C at a cooling rate of 0.5°C / min;

[0040] (3) Continue to add 0.1 parts by weight of sodium metal to the reactor, and continuously feed 920 parts by weight of ethylene oxide into the reactor under a nitrogen atmosphere and a reaction temperature of 90°C (the heating rate is 0.2°C / min). Alkanes, in order to maintain the pressure in the reactor at 0.4MPa, continue to react for 6h after feeding, and then lower the temperature to 60°C, the cooling rate is 0.5°C / min;

[0041] (4) Add 0.1 parts by wei...

Embodiment 3

[0044] (1) Add 30 parts by weight of 2-methyl-3-butyn-2-ol and 0.01 parts by weight of sodium hydroxide to the reactor, and react under a nitrogen atmosphere, the reaction temperature is 30 ° C, and the reaction time is 3h ;

[0045] (2) Continue to heat up to 90°C with a heating rate of 0.8°C / min, then continuously feed 50 parts by weight of ethylene oxide into the reactor to maintain the pressure in the reactor at 0.5MPa, and continue to React for 6 hours, then lower the temperature to 60°C at a cooling rate of 0.2°C / min;

[0046] (3) Continue to add 0.05 parts by weight of sodium hydroxide to the reactor, and continuously feed 920 parts by weight of epoxy resin into the reactor under a nitrogen atmosphere and a reaction temperature of 90°C (heating rate is 0.8°C / min). Ethane, to maintain the pressure in the reactor at 0.5MPa, continue to react for 6h after feeding, and then lower the temperature to 60°C at a cooling rate of 0.2°C / min;

[0047] (4) Add 0.2 parts by weight ...

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Abstract

The invention discloses an unsaturated alkenyl polyether monomer for water reducer of cement and a preparation method thereof. The polyether monomer has a structural formula shown in HO-(R1)m-(R2)n-R3-CH=CH2, wherein R1 is CH2CH2O, R2 is CH2CH2CH2O, m and n are both integers between 0 and 100 and the sum of m and n is equal to or greater than 50 and less than or equal to 100 and R3 is hydrocarbyl with 2-4 carbon atoms. According to the invention, since alkynol is adopted to have ring-opening polymerization reaction with ethylene oxide and / or propylene oxide under the action of a basic catalyst, the generation of polyethylene glycol and polyethylene glycol mono-alcohol ether which are by-products of an ethoxylation reaction can be effectively reduced and the phenomenon that the molecular weight distribution of the product is broadened is avoided.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an unsaturated ethylenic polyether monomer for a concrete water reducer and a preparation method thereof. Background technique [0002] In recent years, polycarboxylate superplasticizers can meet the application of concrete in many special cases, such as high workability and long durability, because of their molecular structure designability and superior water reduction and slump retention properties. It has become the representative of high performance concrete admixture. As the main raw material for the production of polycarboxylate superplasticizers, polyether monomers determine the main performance of polycarboxylate superplasticizers and are the basis for ensuring dispersibility and dispersibility retention capabilities, and their research is increasingly valued. [0003] In the presence of catalysts, the ring-opening condensation addition reaction of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/322C08G65/28C04B24/32C04B103/30
Inventor 方云辉柯余良蒋卓君苏晋升官梦芹赖广兴郑荣平郭鑫祺林添兴李乐民
Owner KZJ NEW MATERIALS GROUP CO LTD
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