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Organic silicon/saccharide co-modified polycarboxylate water reducing agent and preparation method thereof

A technology of organosilicon and co-modification, applied in the field of concrete external processing agent, can solve the problems of poor compatibility of concrete raw materials, single raw materials, non-renewable and other problems, and achieve the effect of improving cement adaptability, enhancing compatibility and reducing production costs

Inactive Publication Date: 2015-12-09
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Polyether and polyethylene glycol are the main components of polycarboxylate superplasticizers, and their raw materials are single and non-renewable, resulting in a problem that the price is much higher than other high-efficiency water reducers.
However, there is a compatibility problem between the polycarboxylate superplasticizer synthesized above and the concrete raw materials.
[0006] In view of the high cost of the polycarboxylate water reducer synthesized in the prior art and the poor compatibility with concrete raw materials, it is necessary to develop a new type of polycarboxylate water reducer with lower cost and better compatibility with concrete. The present invention thus

Method used

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  • Organic silicon/saccharide co-modified polycarboxylate water reducing agent and preparation method thereof
  • Organic silicon/saccharide co-modified polycarboxylate water reducing agent and preparation method thereof
  • Organic silicon/saccharide co-modified polycarboxylate water reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparation of methoxypolyoxyethylene acrylate macromonomer

[0042] Add 1000.0g of methoxypolyethylene glycol with a molecular weight of 1000 and 72.1g of acrylic acid into the reactor, add 5.36g of p-toluenesulfonic acid and 0.54g of hydroquinone, stir and heat to 80°C for esterification for 10h, then distill The resulting water was removed to obtain the methoxypolyoxyethylene acrylate macromonomer.

[0043] (2) Preparation of silicone-modified acrylate macromonomer

[0044] Add 222.4g of aminoethylaminopropyltrimethoxysilane and 72.1g of acrylic acid into the reactor, add methanol solvent, and raise the temperature to reflux for 2 hours, and evaporate the solvent to obtain aminoethylaminopropyltrimethoxysilane Modified acrylate macromonomer.

[0045] (3) Preparation of sugar-modified acrylate macromonomer

[0046] Put 180.2g of glucose and 38.1g of acrylic acid into the reactor, add 1.09g of p-toluenesulfonic acid and 0.11g of hydroquinone, stir and heat to 70...

Embodiment 2

[0050] (1) Preparation of methoxypolyoxyethylene acrylate macromonomer

[0051] Add 1000.0g of methoxypolyethylene glycol with a molecular weight of 1000 and 360.5g of acrylic acid into the reactor, add 68.03g of p-toluenesulfonic acid and 6.80g of hydroquinone, stir and heat to 150°C for esterification for 2 hours, then distill The resulting water was removed to obtain the methoxypolyoxyethylene acrylate macromonomer.

[0052] (2) Preparation of silicone-modified acrylate macromonomer

[0053] Add 264.4g of aminoethylaminopropyltriethoxysilane and 216.3g of acrylic acid into the reactor, add ethanol solvent, and raise the temperature to reflux for 2 hours, and evaporate the solvent to obtain aminoethylaminopropyltriethoxy Silane-modified acrylate macromonomer.

[0054] (3) Preparation of sugar-modified acrylate macromonomer

[0055] Put 180.2g of fructose and 720.6g of acrylic acid into the reactor, add 45.04g of p-toluenesulfonic acid and 4.50g of hydroquinone, stir and h...

Embodiment 3

[0059] (1) Preparation of methoxypolyoxyethylene acrylate macromonomer

[0060] Add 1000.0g of methoxypolyethylene glycol with a molecular weight of 1000 and 216.2g of acrylic acid into the reactor, add 24.32g of p-toluenesulfonic acid and 2.43g of hydroquinone, stir and heat to 120°C for esterification for 5 hours, then distill The resulting water was removed to obtain the methoxypolyoxyethylene acrylate macromonomer.

[0061] (2) Preparation of silicone-modified acrylate macromonomer

[0062] Add 206.4g of aminoethylaminopropylmethyldimethoxysilane and 144.1g of acrylic acid into the reactor, add propanol solvent, and heat up to reflux reaction for 10h, and evaporate the solvent to obtain aminoethylaminopropyl Methyldimethoxysilane modified acrylate macromonomer.

[0063] (3) Preparation of sugar-modified acrylate macromonomer

[0064] Add 342.3g of lactose and 360.3g of acrylic acid into the reactor, add 21.08g of p-toluenesulfonic acid and 2.11g of hydroquinone, stir an...

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Abstract

The invention discloses an organic silicon / saccharide co-modified polycarboxylate water reducing agent and a preparation method thereof. The preparation method includes the following steps: (1) preparing a methoxypolyoxyethylene (methyl) acrylate macromonomer; (2) preparing an organic silicon modified (methyl) acrylate macromonomer; (3) preparing a saccharide modified (methyl) acrylate macromonomer; and (4) preparing the organic silicon / saccharide co-modified polycarboxylate water reducing agent with the macromonomers in the steps (1), (2) and (3). The water reducing agent is low in cost, is prepared from environment-protective and recyclable raw materials, is excellent in water reducing performance and slump degree maintaining performance, is simple in preparation method and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of external processing agents for concrete, and in particular relates to a polycarboxylate water-reducer co-modified by organosilicon and sugars and a preparation method thereof. Background technique [0002] Concrete is the largest and most widely used building material in the world. In order to make concrete have properties such as setting adjustment, reducing heat of hydration, fluidity, high strength, light weight and high durability, and to make concrete meet various construction requirements, it is necessary to add admixtures to concrete. At present, water reducing agent is the most widely studied and used concrete admixture. [0003] Traditional water reducers include naphthalene-based, melamine-based, and aliphatic high-efficiency water-reducers. Although this type of water-reducer has a good dispersion effect on fresh concrete, this type of water-reducer has a prepared concrete slump The disadvant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F230/08C08F220/28C08F220/06C08F228/02C04B24/16C04B103/30
Inventor 曾小君袁荣鑫赵登宇李立诚许家瑞张裕明
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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