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Method for preparing cellulose ethers, cellulose ethers prepared by said method and architectural finishing material comprising same

A technology of cellulose ether and cellulose, applied in the field of preparation of cellulose ether, cellulose ether prepared by said preparation and building decoration materials containing it, to achieve the effects of improving surface operability and improving processing efficiency

Inactive Publication Date: 2019-03-15
LOTTE FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the present invention intends to solve the problem that lumps are generated depending on the situation when cellulose ether is applied to building and finishing materials.

Method used

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  • Method for preparing cellulose ethers, cellulose ethers prepared by said method and architectural finishing material comprising same

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preparation example Construction

[0027] The present invention relates to a preparation method of cellulose ether, the cellulose ether prepared by the method and building decoration materials containing it, wherein the preparation method of the cellulose ether comprises the following steps: (1) by making the cellulose reacting with an alkalizing agent to obtain alkalized cellulose; (2) obtaining cellulose ether in a slurry state by subjecting the alkalized cellulose to an etherification reaction; and (3) to complete the ether Surfactants are added to the cellulose ether in the slurry state after chemical reaction.

[0028] First, the preparation method of the cellulose ether is specifically reviewed step by step as follows.

[0029] (1) The step of obtaining alkalized cellulose

[0030] This step is a step of obtaining alkalized cellulose by reacting cellulose with an alkalizing agent.

[0031] The step of obtaining the alkalized cellulose can be carried out under the reactants and reaction conditions common...

Embodiment 1

[0059] 1 kg of finely pulverized pulp (cellulose) (Rayonier, Ethenier-F), 1 kg of dimethyl ether as a reaction solvent and 50% by weight of sodium hydroxide as an alkalizing agent were added to the pressure reactor (Sanden Junyaku Industries) 1.25 kg of aqueous solution was stirred at 25° C. at 80 rpm for 60 minutes to obtain alkalized cellulose.

[0060] Next, after adding 125 g of ethylene oxide and 1 kg of methyl chloride into the reactor, react at 50° C. for 30 minutes, and then raise the temperature of the reactor to 90° C. at a rate of 2° C. / min. , carry out etherification reaction for 60 minutes.

[0061] Next, after the cellulose ether in the slurry state after the etherification reaction was completed was transferred to the slurry tank, 1 g of Pluronic RPE2520 (Basf) and water were added to the slurry tank as a nonionic surfactant. 7 L, then stirred at 100 rpm for one minute at 90 °C. At this time, the HLB value of the nonionic surfactant is 6, based on 100 parts by...

Embodiment 2

[0065]Cellulose ether was prepared by the same method as in Example 1 above except that 5 g of the nonionic surfactant was added. At this time, based on 100 parts by weight of cellulose, the added amount of the nonionic surfactant is equivalent to 0.5 parts by weight.

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Abstract

The present invention relates to a method for preparing cellulose ethers, comprising the following steps of: (1) reacting cellulose with an alkalizing agent to obtain an alkalized cellulose; (2) etherifying the alkalized cellulose to obtain cellulose ethers in a slurry state; and (3) introducing a surfactant to the cellulose ethers in a slurry state in which the etherification reaction is complete, to cellulose ethers prepared by the method, and to architectural finishing materials comprising the same. According to the present invention, there can be provided a method for preparing cellulose ethers having improved cold water solubility, and by including cellulose ethers prepared by the method, the present invention can provide architectural finishing materials in which an amount of lump generated when mixed with cold water is minimized and the surface workability thereof is improved.

Description

technical field [0001] The present invention relates to a method for preparing cellulose ether, cellulose ether prepared by the method and building decoration materials containing it. More specifically, it relates to a kind of A method for preparing cellulose ether with improved cold water solubility by adding a surfactant to cellulose ether, a cellulose ether prepared by the method, and a building decoration material containing it. Background technique [0002] Cellulose ether refers to cellulose derivatives obtained by partially or fully etherifying the hydroxyl groups of cellulose. Cellulose ether is widely used in the fields of pharmaceuticals, food, cosmetics, building decoration materials, etc. and is very popular in the industry. useful compound. [0003] Specifically, the cellulose ether is a thickener based on natural materials. Even if a small amount of the cellulose ether is added, it can exhibit an excellent thickening effect, which is different from other chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/00C08B1/08C08B11/02C08B11/08C08L1/28
CPCC08B1/08C08B11/00C08B11/02C08B11/08C08L1/28C04B24/383C04B2103/406C04B28/14C04B2103/44C04B14/28C04B24/04C04B40/0028C08L1/284
Inventor 具本赫李阿凛南旭灿郑贤智
Owner LOTTE FINE CHEM CO LTD
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