Water-reducing polycarboxylate superplasticizer with vinyl ether ester mixed structure and preparation method thereof

A hybrid structure, vinyl ether technology, applied in the field of concrete admixtures, can solve problems such as high temperature and inapplicability, and achieve the effects of improving workability, reducing steric resistance, and improving wrapping and entanglement.

Pending Publication Date: 2022-02-25
重庆建研科之杰新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis of existing polycarboxylate superplasticizers usually uses a redox initiation system, and the temperature required for the decomposition of the initiator is relatively high, which is not suitable for the polymerization of vinyl ether macromonomers

Method used

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  • Water-reducing polycarboxylate superplasticizer with vinyl ether ester mixed structure and preparation method thereof
  • Water-reducing polycarboxylate superplasticizer with vinyl ether ester mixed structure and preparation method thereof
  • Water-reducing polycarboxylate superplasticizer with vinyl ether ester mixed structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 100g of ethylene glycol monovinyl polyethylene glycol ether, 20g of polyethylene glycol diacrylate and 50g of water into the reactor, control the temperature at 15°C, place the reactor under ultraviolet light irradiation, and stir At the same time, 2,4,6 (trimethylbenzoyl)diphenylphosphine oxide aqueous solution, mercaptoacetic acid aqueous solution, and A solution were added dropwise within 1.5h respectively, and after the addition was completed, the insulation was kept for 0.5h to obtain the reaction product; Adjust the pH to 6.5 with sodium hydroxide to obtain a polycarboxylate water reducer with a mixed structure of vinyl ether ester;

[0038] Wherein, 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide aqueous solution is 2.2g of 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide dissolved in 150g water, mercaptoacetic acid The aqueous solution is 0.5g mercaptoacetic acid dissolved in 150g water, the A solution is 10g acrylic acid, 5g cross-linking monomer diethylen...

Embodiment 2

[0042] Add 100g of butanediol monovinyl polyethylene glycol ether, 20g of polyethylene glycol diacrylate and 50g of water into the reactor, control the temperature at 20°C, place the reactor under ultraviolet light irradiation, and stir At the same time, 2,4,6-trimethylbenzoyl ethyl phosphonate aqueous solution, mercaptoethanol aqueous solution, acrylic acid and cross-linking monomer blended aqueous solution were added dropwise within 1.5h, and after the dropwise addition, it was incubated for 0.5h to obtain the reaction product; the pH of the reaction product is adjusted to 7.0 with sodium hydroxide to obtain a polycarboxylate water reducer with a mixed structure of vinyl ether ester;

[0043] Among them, the aqueous solution of ethyl 2,4,6-trimethylbenzoylphosphonate is 2.0g of ethyl 2,4,6-trimethylbenzoylphosphonate dissolved in 150g of water, and the aqueous solution of mercaptoethanol is 0.5g Mercaptoethanol was dissolved in 150g of water, and the blended aqueous solution o...

Embodiment 3

[0047] Add 100g of hexanediol monovinyl polyethylene glycol ether, 10g of polyethylene glycol diacrylate and 50g of water into the reactor, control the temperature at 20°C, place the reactor under ultraviolet light irradiation, and stir At the same time, 2,4,6 (trimethylbenzoyl)diphenylphosphine oxide aqueous solution, mercaptoacetic acid aqueous solution, acrylic acid and cross-linking monomer blended aqueous solution were added dropwise within 1.5h, and the temperature was kept for 0.5h after the dropwise addition. Obtain a reaction product; adjust the pH of the reaction product to 6.5 with sodium hydroxide to obtain a polycarboxylate water reducer with a mixed structure of vinyl ether ester;

[0048] Wherein, 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide aqueous solution is 2.5g of 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide dissolved in 150g water, mercaptoacetic acid The aqueous solution is 0.5 g of mercaptoacetic acid dissolved in 150 g of water, and the blended ...

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Abstract

The invention relates to the technical field of concrete admixtures, in particular to a water-reducing polycarboxylate superplasticizer with a vinyl ether ester mixed structure and a preparation method of the water-reducing polycarboxylate superplasticizer. The water-reducing polycarboxylate superplasticizer with the vinyl ether ester mixed structure comprises an unsaturated acid monomer, a vinyl polyether macromonomer, an ester macromonomer and a crosslinking monomer. The water-reducing polycarboxylate superplasticizer with vinyl ether ester mixed structure provided by the invention has outstanding water reducing performance, can effectively improve the workability of concrete, and has very high practical value and popularization prospect.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a vinyl ether ester mixed structure water-reducing polycarboxylate water-reducer and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer has excellent performance in concrete. Macromonomer is one of the important raw materials in the synthesis of polycarboxylate superplasticizer, and its molecular structure has a very important influence on the synthesis process and performance of polycarboxylate superplasticizer. Currently the most common vinyl alcohol macromonomers on the market are allyl polyethylene glycol ether (APEG), methallyl polyethylene glycol ether (HPEG) and isopentenyl polyethylene glycol ether. (TPEG) etc. This type of polyether monomer has simple synthesis process, stable chemical properties and good product quality. But there are also many problems. On the one hand, among the existing vinyl alcohol macromono...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F216/12C08F222/20C08F2/48C04B24/26C04B103/30
CPCC08F283/065C08F2/48C04B24/2694C04B2103/302C08F220/06C08F216/125C08F222/102
Inventor 方云辉林艳梅赖华珍陈展华肖悦李格丽
Owner 重庆建研科之杰新材料有限公司
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