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Application of Trimethylolpropane Triacrylate in Preparation of Polycarboxylate Water Reducer

A technology of trimethylolpropane triacrylate and polycarboxylic acid, which is applied to the application field of trimethylolpropane triacrylate in the preparation of polycarboxylate water reducing agent, and can solve the problem of trimethylolpropane triacrylate. Acrylate and other problems can solve the problem of excessive slump loss, improve the initial mortar fluidity, and reduce the loss over time.

Active Publication Date: 2018-06-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no relevant report on the application of trimethylolpropane triacrylate in the preparation of polycarboxylate superplasticizers

Method used

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  • Application of Trimethylolpropane Triacrylate in Preparation of Polycarboxylate Water Reducer
  • Application of Trimethylolpropane Triacrylate in Preparation of Polycarboxylate Water Reducer
  • Application of Trimethylolpropane Triacrylate in Preparation of Polycarboxylate Water Reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 48g (0.02mol) polyalkoxyalkylene long-chain unsaturated monomer (BAPP, weight-average molecular weight is 2400) is dissolved in the four-neck round bottom flask that 100g deionized water is housed; 4.32g (0.06mol) acrylic acid ( AA) was dissolved in 30g deionized water to form solution A; 0.236gL-ascorbic acid (Vc) and 0.5g sodium methacrylate (SMA) were dissolved in 24g deionized water to form solution B;

[0048] Nitrogen (N 2 ) for 30 minutes to remove oxygen, then heat up to 70°C, add 1.5g hydrogen peroxide (30% aqueous solution) into the reaction flask at one time, then add solution A and solution B dropwise, keep warm for 1 hour after the addition is completed, and add 0.08g trimethylol propane triacrylate (TMPTA), and then keep warm for 3 hours to obtain polycarboxylate superplasticizer (solution).

[0049] In order to determine its structure, the polycarboxylate water reducer synthesized in Example 1 of the present invention was tested by FTIR and dynamic light...

Embodiment 2

[0054] 48g polyalkoxyalkylene long-chain unsaturated monomer (BAPP, weight average molecular weight is 2400) is dissolved in the four necked round bottom flask that 100g deionized water is housed; 4.32g acrylic acid (AA) is dissolved in 30g deionized water Make solution A; 0.236gL-ascorbic acid (Vc) and 0.5g sodium methacrylate (SMA) are dissolved in 24g deionized water to make solution B;

[0055] Nitrogen (N 2) for 30 minutes to remove oxygen, then raise the temperature to 70°C, add 1.5g hydrogen peroxide (≥30% aqueous solution) into the reaction bottle at one time, then add solution A and solution B dropwise, keep warm for 1 hour after the addition is completed, and add 0.16g trihydroxy Methyl propane triacrylate (TMPTA), and then keep warm for 3 hours to obtain polycarboxylate superplasticizer (solution).

[0056] In order to determine its structure, FTIR, dynamic light scattering and other tests were carried out on the polycarboxylate water reducer synthesized in Example...

Embodiment 3

[0061] 48g polyalkoxyalkylene long-chain unsaturated monomer (BAPP, weight average molecular weight is 2400) is dissolved in the four necked round bottom flask that 100g deionized water is housed; 4.32g acrylic acid (AA) is dissolved in 30g deionized water Make solution A; 0.236gL-ascorbic acid (Vc) and 0.5g sodium methacrylate (SMA) are dissolved in 24g deionized water to make solution B;

[0062] Nitrogen (N 2 ) for 30 minutes to remove oxygen, then raise the temperature to 70°C, add 1.5g hydrogen peroxide (≥30% aqueous solution) into the reaction flask at one time, then add solution A and solution B dropwise, keep warm for 1 hour after the addition is completed, and add 0.24g trihydroxy Methyl propane triacrylate (TMPTA), and then keep warm for 3 hours to obtain polycarboxylate superplasticizer (solution).

[0063] In order to determine its structure, tests such as FTIR and dynamic light scattering were carried out on the polycarboxylate water reducer synthesized in Exampl...

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Abstract

The invention provides a new purpose of trimethylolpropane triacrylate, and particularly discloses an application of the trimethylolpropane triacrylate to preparing polycarboxylate water reducers. The trimethylolpropane triacrylate is added into the polycarboxylate water reducers, the initial mortar fluidity of the water reducers is improved, the stable mortar fluidity can be kept in long time, the slump time losing is effectively reduced, and the problem that the slump is lost in an excessively-rapid mode when concrete is used is solved.

Description

technical field [0001] The invention relates to the application of trimethylolpropane triacrylate in preparing polycarboxylate water reducer. Background technique [0002] Trimethylolpropane triacrylate (TMPTA), alias: propane trimethanol triacrylate, CAS No. 15625-89-5, mainly used in photocurable coatings, photocurable inks, photoresists, flexographic prints, circuit boards Printing materials, solder resists, resists, finishing agents, paints, etc. It can also be used as a reactive diluent for synthetic resins, synthetic fibers and coatings. [0003] At present, there is no relevant report on the application of trimethylolpropane triacrylate in the preparation of polycarboxylate water reducer. Contents of the invention [0004] The purpose of the present invention is to provide a new application of trimethylolpropane triacrylate, specifically the application of trimethylolpropane triacrylate in the preparation of polycarboxylate water reducer. [0005] The invention pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F222/14C08F220/06C08F222/06C08F222/02C08F4/40C08F2/38C04B24/26C04B103/30
Inventor 邹华维梁梅任芹玉
Owner SICHUAN UNIV
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