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Preparation method of high-temperature water-retention modified cellulose ether

A technology of water-soluble cellulose and cellulose ether, which is applied in the field of preparation of high-temperature water-retaining modified cellulose ether, can solve problems such as product instability and low gel temperature, and achieve high temperature resistance, high gel temperature, The effect of product stability

Inactive Publication Date: 2022-06-03
南京钧正新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing high-temperature water-retaining modified cellulose ether, aiming to solve the problem of unstable product and low gel temperature in the prior art, although the process of cellulose ether prepared in a traditional way is simple and fast. technical problem

Method used

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  • Preparation method of high-temperature water-retention modified cellulose ether
  • Preparation method of high-temperature water-retention modified cellulose ether
  • Preparation method of high-temperature water-retention modified cellulose ether

Examples

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Embodiment 1

[0023] Example 1, see figure 1 , the present invention provides a preparation method of high temperature water retention modified cellulose ether, the preparation method of said high temperature water retention modified cellulose ether is composed of 20 parts of cellulose powder and 20 parts of water Cellulose ether, 0.1 part modifier, 0.01 part catalyst and 10 parts solvent.

[0024] A preparation method of high temperature water retention modified cellulose ether, comprising the following steps:

[0025] S1: get 20 parts of described cellulose powders and add in the alkalization kettle to carry out alkalization;

[0026] S2: get 20 parts of water-soluble cellulose ether, 10 parts of solvent, 0.01 part of catalyst and add it into a three-necked reaction flask equipped with a reflux condensing device, and add the alkalized cellulose powder, stir and swell at room temperature M hours, then warm to

[0027] S3: Slowly add 0.1 part of modifier, react Precipitate and wash t...

Embodiment 2

[0030] Example 2, see figure 2 , the present invention provides a preparation method of high temperature water retention modified cellulose ether, the preparation method of the high temperature water retention modified cellulose ether is composed of 25 parts of cellulose powder and 25 parts of water-soluble cellulose powder according to the following parts by weight of raw materials Cellulose ether, 7.55 parts modifier, 5.005 parts catalyst and 455 parts solvent.

[0031] A preparation method of high temperature water retention modified cellulose ether, comprising the following steps:

[0032] S1: get 25 parts of the described cellulose powder and add it in the alkalization kettle to carry out alkalization;

[0033] S2: get 25 parts of water-soluble cellulose ethers, 455 parts of solvents, 5.005 parts of catalysts and add them into the three-necked reaction flask equipped with the reflux condensing device, and add the alkalized cellulose powder, stir and swell at room temper...

Embodiment 3

[0037] Example 3, see image 3 , the present invention provides a preparation method of high temperature water retention modified cellulose ether, the preparation method of said high temperature water retention modified cellulose ether is composed of 30 parts of cellulose powder and 30 parts of water-soluble cellulose ether according to the following parts by weight of raw materials Cellulose ether, 15 parts modifier, 10 parts catalyst and 900 parts solvent.

[0038] A preparation method of high temperature water retention modified cellulose ether, comprising the following steps:

[0039] S1: get 30 parts of the described cellulose powders and add in the alkalization kettle to carry out alkalization;

[0040] S2: get 30 parts of water-soluble cellulose ethers, 900 parts of solvents, 10 parts of catalysts and add them into a three-necked reaction flask equipped with a reflux condensing device, and add the alkalized cellulose powder, stir and swell at room temperature M hours,...

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Abstract

The invention relates to the technical field of preparation of building additives, and particularly discloses a preparation method of high-temperature water-retention modified cellulose ether.The temperature-resistant modified water-soluble cellulose ether is prepared by introducing 4-C1-18 alkyl) benzyl into a molecular chain of water-soluble cellulose ether through a hydroxyl functional group on the molecular chain of the water-soluble cellulose ether. The modifier 4-C1-18 alkyl benzyl bromide and 4-C1-18 alkyl benzyl chloride contain rigid heat-resistant group benzene rings, so that the introduction of the modifier not only enables the water-soluble cellulose ether to generate intermolecular association, enhances the tackifying ability of the polymer, but also increases the rigidity of the whole molecular chain, thereby enhancing the viscosity of the polymer. Therefore, the temperature resistance, salt resistance and aging resistance of the polymer are improved, so that the product is stable and the gel temperature is not low.

Description

technical field [0001] The invention relates to the technical field of preparation of building additives, in particular to a preparation method of high temperature water retention modified cellulose ether. Background technique [0002] In the dry mixing process of mortar, it is often necessary to add cellulose ether, so that the mixed cement mortar has high water retention and good viscosity increasing effect, so that the cement mortar can keep enough water for a long time. . [0003] However, although the cellulose ether prepared by the traditional method is simple and fast, the product is unstable and the gel temperature is low. SUMMARY OF THE INVENTION [0004] The object of the present invention is to provide a kind of preparation method of high temperature water retention modified cellulose ether, aiming to solve the problem that the cellulose ether prepared by traditional means in the prior art is simple and quick, but the product is unstable and the gel temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/16
CPCC08B11/16
Inventor 王正权孙卉
Owner 南京钧正新材料有限公司
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