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Preparation method of building adhesive

An adhesive and construction technology, applied in the direction of adhesive types, cyclodextrin adhesives, starch-derived adhesives, etc., can solve the problems of low bonding strength, hidden safety hazards, poor adhesion, etc. Bond strength, avoid hollowing, improve the effect of dispersing performance

Inactive Publication Date: 2020-05-05
罗桂富
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem mainly solved by the present invention, aiming at the defect that most of the current construction adhesives are rigid materials, which have poor adhesion to concrete, ceramic tiles and other construction materials, and low bonding strength, will cause potential safety hazards, a construction adhesive is provided. The preparation method of mixture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Polyvinyl alcohol is: PVA-1788

[0036] Preparation of the product to be purified:

[0037] In terms of parts by weight, add 60 parts of β-cyclodextrin and 80 parts of sodium hydroxide solution with a mass fraction of 40% to the beaker, stir at room temperature for 10 minutes, then add 4 parts of glycidyltrimethylammonium chloride, Heating in a water bath to 60°C, keeping it warm for 3 hours, filtering to remove the filtrate, drying to obtain the product to be purified;

[0038] Preparation of viscosifying cyclodextrins:

[0039] In terms of parts by weight, after dissolving 60 parts of the above-mentioned product to be purified with 180 parts of hot water at a temperature of 60°C, adjust the pH to 6 with dilute hydrochloric acid with a mass fraction of 10%, and then place it in a refrigerator with a set temperature of 80°C. In a vacuum drying oven, after drying for 3 hours, put it in a mortar and grind for 3 hours, dissolve 200 parts of N,N-dimethylformamide of the o...

Embodiment 2

[0047] Polyvinyl alcohol is: PVA-1799

[0048] Preparation of the product to be purified:

[0049] In terms of parts by weight, add 65 parts of β-cyclodextrin and 90 parts of sodium hydroxide solution with a mass fraction of 40% to the beaker, stir at room temperature for 12.5 minutes, and then add 5 parts of glycidyltrimethylammonium chloride , heated in a water bath to 62.5°C, kept the temperature for 3.5 hours, filtered to remove the filtrate, and dried to obtain the product to be purified;

[0050] Preparation of viscosifying cyclodextrins:

[0051] In terms of parts by weight, after dissolving 70 parts of the above-mentioned product to be purified with 190 parts of hot water at a temperature of 62.5°C, adjust the pH to 6.5 with dilute hydrochloric acid with a mass fraction of 10%, and then place it in a refrigerator with a set temperature of 85°C. In a vacuum drying oven, after drying for 3.5 hours, put it in a mortar and grind for 3.5 hours, dissolve 210 parts of N,N-d...

Embodiment 3

[0059] Polyvinyl alcohol is: PVA-2488

[0060] Preparation of the product to be purified:

[0061] In terms of parts by weight, add 70 parts of β-cyclodextrin and 100 parts of sodium hydroxide solution with a mass fraction of 40% to the beaker, stir at room temperature for 15 minutes, then add 6 parts of glycidyltrimethylammonium chloride, Heating in a water bath to 65°C, keeping it warm for 4 hours, filtering to remove the filtrate, drying to obtain the product to be purified;

[0062] Preparation of viscosifying cyclodextrins:

[0063] In terms of parts by weight, after dissolving 80 parts of the above-mentioned product to be purified with 200 parts of hot water at a temperature of 65°C, adjust the pH to 7 with dilute hydrochloric acid with a mass fraction of 10%, and then place it in a refrigerator with a set temperature of 90°C. In a vacuum drying oven, after drying for 4 hours, put it in a mortar and grind for 4 hours, dissolve 220 parts of N,N-dimethylformamide of the ...

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PUM

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Abstract

The invention belongs to the field of adhesive manufacturing, and particularly relates to a preparation method of a building adhesive. According to the invention, waste straw is used as a raw materialto prepare the building adhesive. The building adhesive is a water-based adhesive, the tackifying cyclodextrin is cyclodextrin cationized by glycidyl chloride trimethylammonium, and the cationic cyclodextrin can coat cement in mortar in a colloid form in water, so that the bonding strength is improved, and the hollowing phenomenon of the adhesive is avoided; carboxymethylation is performed on lignin; the dispersion performance of cyclodextrin is favorably improved, and the carboxymethylated lignin has an obvious complexing effect on divalent metal salt ions, so that salting-out can be avoidedwhile the bonding strength is improved, the carboxymethylated lignin can increase the average molecular weight of the cyclodextrin and can improve the deposition density of the cyclodextrin during construction surface bonding, the polyvinyl formal enhances the flexibility and pressure resistance of an adhesive film after the adhesive is cured, the flexibility and bonding strength of the adhesiveare improved, and the adhesive has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of adhesive manufacture, and in particular relates to a preparation method of construction adhesive. Background technique [0002] With the development of science and technology and the improvement of people's living standards, adhesives are widely used, and people's requirements for adhesives are getting higher and higher. Low cost, strong security and other characteristics. But today's adhesives have high production costs and poor environmental performance. [0003] In recent years, with the rapid development of the construction industry, tile adhesives for pasting decorative materials such as ceramic tiles, facing tiles, and floor tiles have been widely used in interior and exterior walls, floors, bathrooms, kitchens and other building decorations. Since most of the existing tile adhesives are rigid materials, there is not enough adhesion between the cement mortar and the tiles after molding, and the external env...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J197/00C09J129/14C09J105/16C09J103/10C09J11/08C08B37/16C08H7/00C08G18/76C08G18/36
CPCC08B37/0012C08G18/36C08G18/7614C08H6/00C08L2205/035C09J11/08C09J175/14C08L97/005C08L29/14C08L5/16C08L3/10
Inventor 丁正颖
Owner 罗桂富
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