Composite functional polycarboxylic acid water reducing agent mother liquor synthesized at normal temperature and preparation method thereof

A technology for synthesizing polycarboxylic acid at room temperature, which is applied in the chemical industry to achieve the effects of good workability, short production cycle and excellent performance

Inactive Publication Date: 2019-07-05
四川铁科新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no polycarboxylate superplasticizer with good performance but less affected by temperature in production

Method used

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  • Composite functional polycarboxylic acid water reducing agent mother liquor synthesized at normal temperature and preparation method thereof
  • Composite functional polycarboxylic acid water reducing agent mother liquor synthesized at normal temperature and preparation method thereof
  • Composite functional polycarboxylic acid water reducing agent mother liquor synthesized at normal temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A mother solution of synthetic composite functional polycarboxylate water-reducing agent at room temperature is composed of the following components in parts by weight: deionized purified water: 30-36 parts; polyether monomers: 38-48 parts; A solution: 9 parts -10 parts; B solution: 6-7 parts; C solution: 6-8 parts; Sodium hypophosphite: 0.8-1 part.

[0029] Preferably, the polyether monomer is selected from one of isobutylene alcohol polyoxyethylene ether, methallyl polyoxyethylene ether, and allyl polyoxyethylene ether.

[0030] Preferably, the A solution is prepared from an unsaturated carboxylic acid or its derivative and deionized purified water, and its mass ratio ranges from 0.8 to 1.

[0031] Preferably, the unsaturated carboxylic acid or its derivative is one of methacrylic acid, acrylic acid, maleic anhydride and methyl methacrylate.

[0032] Preferably, the B solution includes L-sodium ascorbate and deionized purified water, and the mass ratio thereof ranges...

Embodiment 2

[0042] This embodiment takes the preparation of 1000kg normal temperature synthetic composite functional polycarboxylate water reducing agent mother liquor as an example:

[0043] To prepare the mother liquor of polycarboxylate water-reducing agent, its proportion is calculated according to the weight percentage, put 320kg of deionized purified water and 440kg of isobutenol polyoxyethylene ether into the reaction kettle, and stir at room temperature of 5 ℃ for 2.0h until fully dissolved; Material kettle configuration A solution: put in 50kg of deionized purified water, 45kg of methacrylic acid, and stir for 30min until uniform. Configure B solution in the mixing kettle: put in 65kg of deionized purified water, 2.5kg of L-sodium ascorbate, and stir for 30min until uniform. Configure C solution in the mixing kettle: put in 64kg of deionized purified water, 3.5kg of ammonium persulfate and stir for 30min until uniform.

[0044] Add 10kg of sodium hypophosphite to the reaction ke...

Embodiment 3

[0046] Prepare the mother liquor of synthetic composite functional polycarboxylate water-reducing agent at room temperature, the proportion of which is calculated according to the weight percentage, put 330kg of deionized purified water and 420kg of allyl polyoxyethylene ether into the reaction kettle, and stir at room temperature of 40°C for 2.0h Until fully dissolved; configure A solution in the mixing kettle: put in 55kg of deionized purified water, 45kg of methyl methacrylate, and stir for 30min until uniform. Configure B solution in the mixing kettle: put in 63kg of deionized purified water, 2.67kg of L-sodium ascorbate, and stir for 30min until uniform. Configure C solution in the mixing kettle: put in 70kg of deionized purified water, 4.46kg of ammonium persulfate, and stir for 30min until uniform.

[0047]Add 10kg of sodium hypophosphite to the reaction kettle, and after stirring for 20min, simultaneously start to drop the A solution, the B solution and the C solution ...

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Abstract

The invention discloses a composite functional polycarboxylic acid water reducing agent mother liquor synthesized at normal temperature and a preparation method thereof, and belongs to the technical field of chemical industry. The composite functional polycarboxylic acid water reducing agent mother liquor comprises the following components in parts by weight: 30-36 parts of deionized purified water, 38-48 parts of polyether monomers, 9-10 parts of solution A, 6-7 parts of solution B, 6-8 parts of solution C and 0.8-1 part of sodium hypophosphite. In the whole production process of the polycarboxylic acid water reducing agent, the preparation process of the raw materials is respectively included, the requirement on the temperature control of the environment and the production raw materialsis small, and the production period is short. The polycarboxylic acid water reducing agent has excellent properties and is suitable for various sand and stone cements, and the application range is wide. The concrete prepared by the polycarboxylic acid water reducing agent has good workability and high strength. Compared with other water reducers such as the existing polycarboxylic acid water reducers and naphthalene series water reducers, the composite functional polycarboxylic acid water reducing agent mother liquor has obvious economic advantages.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a mother liquor of synthetic composite functional polycarboxylate water-reducing agent at room temperature and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer is the third-generation high-performance concrete admixture, which has the advantages of low parameters, good dispersibility, and large degree of freedom in molecular structure. It has been widely used in various concrete projects and has achieved good results. [0003] However, the current various polycarboxylate superplasticizers are greatly affected by temperature in the production process. All superplasticizer polymerization processes have certain requirements for the initial temperature of polymerization, and the fluctuation range of the initial temperature is small, especially for some superplasticizers. Polycarboxylate superplasticizers polymerized at high temper...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/06C08F220/14C08F222/06C08F2/38C04B24/26C04B103/30
CPCC04B24/2605C04B2103/30C08F283/065C08F220/06C08F220/14C08F222/06
Inventor 苏琳邓斌李胜龙仲一夫兰海堂
Owner 四川铁科新型建材有限公司
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