Preparation method of modified starch ether for prolonging opening time of ceramic tile glue

An open time, starch ether technology, applied in the direction of adhesive additives, polymer adhesive additives, etc., can solve problems such as unfavorable industrial production, complicated operation, etc., to improve strength and bonding performance, expand market space, and prolong opening. effect of time

Inactive Publication Date: 2019-12-20
SHANDONG YITENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the preparation of starch ether products using existing methods 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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  • Preparation method of modified starch ether for prolonging opening time of ceramic tile glue
  • Preparation method of modified starch ether for prolonging opening time of ceramic tile glue
  • Preparation method of modified starch ether for prolonging opening time of ceramic tile glue

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A kind of preparation method of the modified starch ether that promotes tile glue open time, comprises the following operation steps:

[0044] (1) Chemical modification: etherification, drying and crushing of starch

[0045] Add starch, basifying agent, alcohol and inhibitor successively to the stirred reactor with jacket, empty the reactor and purging with nitrogen to remove oxygen, empty again, then add etherification agent in the reactor, heat up, After the reaction is finished, dry and recover the alcohol, and pulverize;

[0046] The starch is tapioca starch; the alkalizing agent is NaOH; the alcohol is ethanol; the inhibitor is Na 2 SO 4 ; The etherifying agent is chloroacetic acid, propylene oxide and oxyethane;

[0047] The reaction conditions for the etherification are 1.5 hours at 20°C, 2.5 hours at 40°C, and 4 hours at 60°C;

[0048] The mass ratio of starch, sodium hydroxide, chloroacetic acid, propylene oxide and ethylene oxide is =1:0.09:0.10:0.18:0.02;...

Embodiment 2

[0071] A kind of preparation method of the modified starch ether that promotes tile glue open time, comprises the following operation steps:

[0072] (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 =1:0.09:0.10:0.18, and the reaction temperature of etherification is 2 hours at 35°C, 3 hours at 50°C, and 4 hours at 65°C;

[0073] The carboxymethyl substitution degree in the obtained carboxymethyl hydroxypropyl starch is 0.16, the hydroxypropoxy content is 16.5%, the 5% viscosity is 7000cp, and the ash content is 16%;

[0074] (2) Physical modification: mix the starch ether, thickener, retarder and water reducer prepared in (1)

[0075] Add carboxymethyl hydroxypropyl starch, thickener, retarder and water reducer into a mixer and mi...

Embodiment 3

[0094] A kind of preparation method of the modified starch ether that promotes tile glue open time, comprises the following steps:

[0095] (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 =1:0.02:0.30:0.02, and the etherification reaction temperature is 30°C for 2 hours, 50°C for 4 hours, and 70°C for 4 hours;

[0096] The hydroxypropoxyl content in the prepared 1# hydroxypropyl hydroxyethyl starch is 25.0%, the hydroxyethoxyl content is 2.5%, the 5% viscosity is 9000cp, and the ash content is 8%;

[0097] (2) Physical modification: Mix the starch ether, thickener, retarder and water reducer in (1).

[0098] Add 1# hydroxypropyl hydroxyethyl starch, thickener, retarder and water reducing agent into the mixer and mix for 40-60 minutes to obtain ...

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Abstract

The invention relates to the technical field of building additives, and especially relates to a preparation method of a modified starch ether for prolonging opening time of ceramic tile glue. The preparation method comprises the following steps: (1) chemical modification: mixing starch, an alkalizing agent, an alcohol and an inhibitor, adding a plurality of etherifying agents, controlling etherifying reaction temperature to be 10-90 DEG C and reaction time to be 2-20 hours, and carrying out chemical modification to obtain an etherified starch; and (2) physical modification: mixing the etherified starch prepared in the step (1), a thickening agent, a retarder and a water reducing agent for a certain time, and carrying out physical modification. The modified starch ether prepared by the preparation method is applied in ceramic tile glue, can greatly improve the adhesive property of ceramic tiles and remarkably prolong the opening time, and the above effect is difficult to be achieved byusing existing starch ether products and methods.

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 open time of tile adhesives. Background technique [0002] As a decorative material, ceramic tiles have a broad market. Generally speaking, after the tile adhesive is mixed with water, it is best to adjust the construction within a certain period of time. After the tiles are applied, the ideal situation is that the bonding is firm and will not fall off, which in turn puts forward requirements for the tensile bond strength of the tile adhesive. With the increasing specialization of the ceramic tile market, there is more and more demand for tiles with a longer opening time. Traditional tile adhesives have been difficult to meet the requirements, so new tile adhesives have developed rapidly. [0003] The new tile adhesive composition includes cement, sand, heavy calcium, redispersible latex powder, cellulose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/12C09J11/08
CPCC08B31/12C09J11/08C08L3/08C04B24/38C04B2111/00672Y02W30/91
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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