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High performance environmental protection processed adhesive powder and its preparing method

A cooked rubber powder, environmentally friendly technology, applied in the direction of adhesive types, starch adhesives, etc., can solve the problems of low overall bonding strength, easy cracking of putty, peeling, foaming, etc., and achieve excellent mildew resistance. Antibacterial properties, environmental protection, mildew resistance and antibacterial properties, the effect of good environmental performance

Inactive Publication Date: 2005-03-02
GUANGZHOU GLORYSTAR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these materials meet the certain requirements of building materials and play a certain role in preventing mildew and moisture, the overall bonding strength of the glue is not high, the putty is easy to crack and fall off, and the water retention, mildew resistance and moisture resistance are relatively poor. It is prone to mildew, peeling and foaming when used, and it is inconvenient to process, transport and store, the process is complicated and the cost is high, especially it contains a large amount of harmful substances such as formaldehyde, which is relatively harmful to the human body and can cause The human nervous system is damaged, which can cause poisoning and cancer in severe cases, and is even more harmful to infants, young children and the elderly and infirm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Modification of starch

[0030] Add 100kg of potato starch into an 800L kneader, control the starch particle size between 10-50μm, control the temperature at about 30°C, slowly add the mixed solution consisting of 1kg of epichlorohydrin and 40kg of industrial alcohol, and finish adding in 30 minutes. Then continue to stir for 20 minutes to obtain the modified starch.

[0031] 2. Cross-linking reaction of modified starch

[0032] Add 100kg of sodium hydroxide and 0.0001kg of carboxymethylcellulose sodium salt to the kneader equipped with modified starch to make the hydroxyl chains in the starch molecules nucleophilic, and further add 50kg of a Chloroacetic acid was used for neutralization, the temperature was controlled at 100°C, and the mixture was stirred for 1 hour to make the nucleophilic starch molecules undergo etherification reaction and further cross-link. The cross-linked reactants were left to stand at room temperature for 12 hours to further complete the ...

Embodiment 2

[0036] 1. Modification of starch

[0037] Add 100kg of cornstarch into an 800L kneader, control the particle size of cornstarch between 10 and 50μm, control the temperature at about 45°C, slowly add the mixed solution consisting of 0.5kg of N-methylolacrylamide and 35kg of industrial alcohol, After adding in 25 minutes, continue to stir for 15 minutes to obtain the modified starch.

[0038] 2. Cross-linking reaction of modified starch

[0039] Add 150 kg of 31% sodium hydroxide solution and 0.1 kg of carboxymethyl cellulose sodium salt to the above-mentioned modified fixed powder to nucleophilize the hydroxyl chains in the starch molecules, and further add 100 kg of dichloroacetic acid for neutralization , control the temperature at 81°C, and stir for 2 hours to make the nucleophilic starch molecules undergo etherification reaction, and then cross-link. The cross-linked reactants were left to stand at room temperature for 12 hours to further complete the reaction.

[0040] ...

Embodiment 3

[0043] 1. Modification of starch

[0044] Add 100kg of tapioca starch into an 800L kneader, control the temperature at about 60°C, slowly add a mixture consisting of 0.1kg of epichlorohydrin and 20kg of alcohol, finish adding in 10 minutes, and then continue stirring for 15 minutes to obtain the modified product. starch.

[0045] 2. Cross-linking reaction of starch

[0046] Add 120kg of concentration 31% sodium hydroxide solution and 0.001kg of carboxymethylcellulose sodium salt to the above-mentioned modified starch to nucleophilize the hydroxyl chain in the starch molecule, and further add 145kg of dichloropropionic acid for neutralization, Control the temperature at 81° C. and stir for 1.5 hours, so that the nucleophilic starch molecules undergo etherification reaction, and then cross-link. The cross-linked reactants were left to stand at room temperature for 18 hours to further complete the reaction.

[0047] 3. Drying of cooked rubber powder

[0048] The cooked rubber...

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Abstract

The adhesive powder for building is prepared with starch, modifier, alcohol, alkali solution, catalyst and tackifier. The preparation process includes adding mixed liquid of modifier and industrial alcohol into starch via stirring to obtain modified starch; adding alkali solution and tackifier into the modified starch via stirring and letting stand; drying the reaction product, crushing, sieving to obtain product. The adhesive powder exhibits high adhesion, excellent environment protecting performance and mildew-proof and antiseptic performance, and may be used widely in building inner wall putty, building paint, corrugated paper box adhesive, etc.

Description

technical field [0001] The invention relates to an adhesive used in building materials and a preparation method thereof, in particular to a high-performance environment-friendly cooked rubber powder and a preparation method thereof. Background technique [0002] With the development of the economy and the improvement of people's living standards, people pay more and more attention to the quality and grade of housing decoration. Putty and paint are generally used to replace wallpapers and tiles in wall decoration. Most of the interior wall putty and tile putty traditionally used in our country are made of polyvinyl alcohol (107 glue) or carboxymethyl cellulose mixed with Shuangfei powder and talcum powder. Although these materials meet the certain needs of building materials and play a certain role in preventing mildew and moisture, the overall bonding strength of the glue is not high, the putty is easy to crack and fall off, and the water retention, mildew resistance and moi...

Claims

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Application Information

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IPC IPC(8): C09J103/02
Inventor 莫万全
Owner GUANGZHOU GLORYSTAR CHEM
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