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A kind of preparation method of the modified starch ether that improves the sliding performance of tile adhesive

A starch ether and tile adhesive technology, applied in the direction of starch-derived adhesives, adhesive types, adhesive additives, etc., can solve the problems of cumbersome operation and unfavorable industrial production

Active Publication Date: 2020-10-23
SHANDONG YITENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the preparation of starch ether products by the existing dry method is mainly a multi-step etherification operation, which is cumbersome and unfavorable for industrial production, and generally only chemical modification is carried out.

Method used

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  • A kind of preparation method of the modified starch ether that improves the sliding performance of tile adhesive
  • A kind of preparation method of the modified starch ether that improves the sliding performance of tile adhesive
  • A kind of preparation method of the modified starch ether that improves the sliding performance of tile adhesive

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Effect test

Embodiment 1

[0064] A kind of preparation method of the modified starch ether that promotes tile adhesive sliding performance, comprises the following operation steps:

[0065] (1) chemical modification: starch is etherified, dried and pulverized;

[0066] Add tapioca starch, alkalizing agent NaOH, ethanol and inhibitor Na 2 SO 4 , the reactor was evacuated and purged with nitrogen to remove oxygen, evacuated again, and then etherification agents were added to the reactor: chloroacetic acid, propylene oxide and ethylene oxide, reacted at 20 ° C for 1.5 hours, and the temperature was raised to 40 React at ℃ for 2.5 hours, and at 60℃ for 4 hours. After the reaction is completed, dry and recover ethanol, and pulverize;

[0067] The mass ratio of above-mentioned tapioca starch, sodium hydroxide, chloroacetic acid, propylene oxide and ethylene oxide is=1:0.09:0.10:0.12:0.02;

[0068] The tapioca starch and inhibitor Na 2 SO 4 The mass ratio is 1:0.05;

[0069] The mass ratio of described ...

Embodiment 2

[0088] A kind of preparation method of the modified starch ether that promotes tile adhesive sliding performance, comprises the following operation steps:

[0089] (1) prepare another kind of starch ether of the present invention according to the description of embodiment 1 step (1), the difference is that the etherification agent is chloroacetic acid and propylene oxide, starch, sodium hydroxide, chloroacetic acid and cyclic The mass ratio of oxypropane is = 1:0.09:0.10:0.12, and the reaction temperature of etherification is 40°C for 3 hours and 60°C for 5 hours;

[0090] The amylose content of the raw starch is 17.23%, the amylopectin content is 68.78%, and the total starch content is 86.01%. The obtained carboxymethyl hydroxypropyl starch structure diagram is shown in Figure 4 , wherein the carboxymethyl substitution degree is 0.16, the hydroxypropoxy content is 12.6%, the 5% viscosity is 7000cp, and the ash content is 16%;

[0091] (2) Physical modification: mix the pre...

Embodiment 3

[0110] A kind of preparation method of the modified starch ether that promotes tile adhesive sliding performance, comprises the following operation steps:

[0111] (1) prepare another kind of starch ether of the present invention according to the description of embodiment 1 step (1), the difference is that the etherifying agent is propylene oxide and ethylene oxide, starch, sodium hydroxide, epoxy The mass ratio of propane to ethylene oxide is =1:0.02:0.12:0.05, and the etherification reaction temperature is 2.5 hours at 20°C, 2.5 hours at 40°C, and 4 hours at 60°C;

[0112] The amylose content of the raw starch is 17.16%, the amylopectin content is 68.73%, and the total starch content is 85.89%. The structure diagram of the prepared hydroxypropyl hydroxyethyl starch is shown in Figure 5 , marked as 1# hydroxypropyl hydroxyethyl starch, wherein the hydroxypropoxy content is 12.5%, the hydroxyethoxy content is 6.5%, the 5% viscosity is 7000cp, and the ash content is 8%;

[01...

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Abstract

The invention relates to the technical field of building additives, in particular to a preparation method of modified starch ether for improving the sliding performance of tile adhesives. The preparation method comprises the steps of carrying out one-step etherification chemical treatment modification on starch to obtain starch ether, and continuing physical modification treatment. This preparation method has changed the cumbersome operation of multi-step etherification in the preparation of existing modified starch ethers. Only one step of simultaneous etherification can obtain starch ether modified products with better performance, and because the physical modification steps continue to be added, The obtained product can significantly improve the sliding performance when used in tile adhesives; at the same time, the operating conditions of one-step simultaneous etherification treatment are significantly different from those of the prior art.

Description

technical field [0001] The invention relates to the technical field of building additives, in particular to a preparation method of modified starch ether for improving the sliding performance of tile adhesives. Background technique [0002] As a decorative material, tiles have a broad market, but with the continuous improvement of the specialization of the tile market, more and more consumers are pursuing the seamless effect of wall decoration, making large-size tiles more and more popular. At the same time, the increasing popularity of large-scale residential buildings has also promoted the popularity of large-scale tiles. The size and quality of tiles are getting bigger and bigger, and the safety requirements are getting higher and higher. Traditional tile adhesives have been difficult to meet the requirements, so new tile adhesives have been developed rapidly. [0003] The new tile adhesive composition includes cement, sand, heavy calcium, redispersible latex powder, cel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/12C09J11/08
CPCC08B31/12C09J11/08C04B24/38C04B2111/00672C08L3/08C08B31/10C09J103/08
Inventor 滕鲲赵明李青华李长胤李茂丰赵洪山张开民
Owner SHANDONG YITENG NEW MATERIAL CO LTD
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