Environmental-friendly high-performance polycarboxylate superplasticizer and synthetic method thereof

A synthesis method and a green and environmentally friendly technology are applied in the field of water reducing agents to achieve the effects of good workability, heat saving and labor saving.

Inactive Publication Date: 2017-08-18
永兴隆诚高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems and deficiencies of the existing polycarboxylate water reducing agent in terms of water reducing rate, slump retention, adaptability, energy consumption of the combined process, and ease of operation, the present invention proposes an environmentally friendly, water reducing rate High polycarboxylate water reducer with good slump retention, strong adaptability and simple process and its synthesis method

Method used

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  • Environmental-friendly high-performance polycarboxylate superplasticizer and synthetic method thereof
  • Environmental-friendly high-performance polycarboxylate superplasticizer and synthetic method thereof
  • Environmental-friendly high-performance polycarboxylate superplasticizer and synthetic method thereof

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preparation example Construction

[0019] The invention provides a synthetic method of a green, environment-friendly and high-performance polycarboxylate water reducer, which specifically includes the following steps:

[0020] (1) Add 75 to 90 parts by weight of polyether macromonomer A1, 1 to 4 parts by weight of hydrogen peroxide, and 90 to 100 parts by weight of water in the reactor, and stir and mix evenly at a temperature of 10 to 50°C; The polyether macromonomer A1 is at least one of acryl alcohol polyoxyethylene ether, isopentenyl alcohol polyoxyethylene ether and methyl alkenyl polyoxyethylene ether;

[0021] (2) Preparation of liquid A: add 5 to 15 parts by weight of unsaturated carboxylic acid or acid anhydride monomer A2, 0 to 5 parts by weight of unsaturated sulfonic acid monomer A3, and 20 to 30 parts by weight of water in a single-necked flask, Mix evenly, marked as liquid A; the unsaturated carboxylic acid or acid anhydride monomer A2 is at least one of acrylic acid, methacrylic acid, hydroxyethy...

Embodiment 1

[0032] The synthetic method of environment-friendly high-performance polycarboxylate water reducer comprises the following steps:

[0033] (1) Add 90g water, 85g polyether macromonomer A1-prenol polyoxyethylene ether (molecular mass is 2400), 4g 27.5wt% of Hydrogen peroxide, stirred at 30°C for 10 minutes;

[0034] (2) Prepare liquid A: add 13g unsaturated carboxylic acid or acid anhydride monomer A2 (10g acrylic acid, 3g hydroxyethyl acrylate), 2g unsaturated sulfonic acid monomer A3-sodium p-styrenesulfonate, and 30g water, add Put it into a one-necked flask, mix well, and mark it as liquid A;

[0035] (3) Preparation of liquid B: add 1 g of reducing agent-Vc, 0.5 g of molecular weight regulator-2-mercaptopropionic acid, and 20 g of water into a single-necked flask, mix well, and mark it as liquid B;

[0036] (4) Under stirring conditions, add liquid A and liquid B uniformly to the four-necked flask in step (1) at the same time, liquid A is added dropwise for 2 hours, and ...

Embodiment 2

[0038] (1) Add 90g water, 84g polyether macromonomer A1-propylene alcohol polyoxyethylene ether (molecular mass is 2400), 3g 27.5wt% hydrogen peroxide in the 500mL four-neck flask that is equipped with electric stirring device and peristaltic pump, Stir at 20°C for 10 minutes;

[0039] (2) Prepare liquid A: Add 13g of unsaturated carboxylic acid or acid anhydride monomer A2-acrylic acid, 3g of unsaturated sulfonic acid monomer A3-sodium p-styrenesulfonate, and 30g of water into a single-necked flask, mix well, Marked as liquid A;

[0040] (3) Preparation of liquid B: Add 0.8 g of reducing agent-Vc, 0.4 g of molecular weight regulator-2-mercaptopropionic acid, and 20 g of water into a single-necked flask, mix well, and mark it as liquid B;

[0041] (4) Under stirring conditions, in the four-necked flask of step (1), dropwise A liquid and B liquid simultaneously, A liquid is added dropwise for 3h, B liquid is added dropwise for 3.5h, after the dropwise addition is completed, ke...

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Abstract

The invention discloses an environmental-friendly and high-performance polycarboxylate superplasticizer and a synthetic method thereof. The synthetic method of the superplasticizer in the invention comprises the following steps: reacting a polyether macromonomer A1, an unsaturated carboxylic acid or anhydride monomer A2 and an unsaturated sulfonic acid monomer A3 in the presence of a reducing agent and a molecular weight modifier so as to obtain a copolymerization product; and regulating the pH value to be 6-7 by using a sodium hydroxide solution, thereby obtaining the high-performance polycarboxylate superplasticizer. The high-performance polycarboxylate superplasticizer synthesized by the method has the characteristics of high water reducing property, high slump retaining property, high adaptability and excellent peaceability when used in concrete; and meanwhile, the synthetic process is simple and environmental-friendly, and is low in energy consumption, easy to operate and high in repeatability.

Description

technical field [0001] The invention belongs to the field of water reducers, and relates to a polycarboxylate water reducer, in particular to a high-performance polycarboxylate water reducer and a synthesis method thereof. Background technique [0002] Polycarboxylate superplasticizer is a water-soluble polymer with a comb structure. Due to its molecular structure design and superior applicability, it has attracted much attention in the concrete construction industry and is currently a hot spot in the field of polymer applications. . By changing the monomer type, ratio, initiation system, and polymerization temperature of the polycarboxylate superplasticizer synthesis process, a variety of functional groups with different proportions are introduced into the polymer molecule to achieve its water-reducing, Adjustment of properties such as slump retention, adaptability, and workability. From the development of polycarboxylate superplasticizers to now, it is mainly divided int...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/06C08F220/28C08F212/14C08F222/06C08F228/02C08F220/58C08F4/40C04B24/16C04B24/26C04B103/30
CPCC08F283/065C04B24/165C04B24/2605C04B2103/302C08F4/40C08F220/06
Inventor 李龙浩肖俊杰刘小华
Owner 永兴隆诚高新材料有限公司
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