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Preparation method of building sealant

A sealant and construction technology, applied in the direction of adhesive types, amide/imide polymer adhesives, adhesive additives, etc., can solve the bonding and sealing performance of building insulation foam materials that are not applicable General, poor heat resistance and other problems, to achieve the effect of improving strength and bonding stability, good consistency and bonding, and increasing the density of the gel

Pending Publication Date: 2020-05-01
广州席风机电设备工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem mainly solved by the present invention is that most of the sealants on the market are deketoxime type sealants, which are not suitable for joint sealing of concrete materials and bonding and sealing of building insulation foam materials, and have poor heat resistance and low strength. Low, general defects of bonding and sealing performance, a preparation method of building sealant is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Said vegetable oil is: linseed oil

[0035] Preparation of monomer emulsion:

[0036] In parts by weight, 40 parts of mixed monomers, 5 parts of sodium hydroxide solution with a mass fraction of 30% and 30 parts of deionized water were added to a three-necked flask with a stirrer and a vent tube, and the temperature was raised to 75 ° C. Introduce nitrogen, start the stirrer, stir at a speed of 200r / min, add 1 part of potassium thiosulfate to the three-necked flask, and react for 1.5 hours to obtain a monomer emulsion. The mixed monomer is composed of methyl methacrylate and benzene Ethylene is obtained by mixing at a mass ratio of 2:3;

[0037] Preparation of soap-free emulsion:

[0038] In parts by weight, after the above-mentioned three-necked flask containing the monomer emulsion is cooled to 68°C, continue to add 30 parts of butyl acrylate, 20 parts of methyl methacrylate, 2 parts of potassium thiosulfate, 20 parts of Sodium carbonate solution with a mass fracti...

Embodiment 2

[0048] The vegetable oils mentioned are: castor oil

[0049] Preparation of monomer emulsion:

[0050] In parts by weight, 45 parts of mixed monomers, 6 parts of 30% sodium hydroxide solution and 35 parts of deionized water were added to a three-necked flask with a stirrer and a vent tube, heated to 76.5 ° C, Introduce nitrogen, start the stirrer, stir at a speed of 225r / min, add 2 parts of potassium thiosulfate to the three-necked flask, and react for 1.75h to obtain a monomer emulsion. The mixed monomer is composed of methyl methacrylate and benzene Ethylene is obtained by mixing at a mass ratio of 2:3;

[0051] Preparation of soap-free emulsion:

[0052] In parts by weight, after the above-mentioned three-necked flask containing the monomer emulsion is cooled to 70°C, continue to add 35 parts of butyl acrylate, 25 parts of methyl methacrylate, 3 parts of potassium thiosulfate, 22.5 parts of Sodium carbonate solution with a mass fraction of 25%, 4 parts of sodium lauryl s...

Embodiment 3

[0062] Described vegetable oil is: rapeseed oil

[0063] Preparation of monomer emulsion:

[0064] In parts by weight, 50 parts of mixed monomers, 7 parts of 30% sodium hydroxide solution and 40 parts of deionized water were added to a three-necked flask with a stirrer and a vent tube, heated to 78 ° C, Introduce nitrogen, start the stirrer, stir at a speed of 250r / min, add 3 parts of potassium thiosulfate to the three-necked flask, and react for 2.0 hours to obtain a monomer emulsion. The mixed monomer is composed of methyl methacrylate and benzene Ethylene is obtained by mixing at a mass ratio of 2:3;

[0065] Preparation of soap-free emulsion:

[0066] In parts by weight, after the above-mentioned three-necked flask containing the monomer emulsion is cooled to 72°C, continue to add 40 parts of butyl acrylate, 30 parts of methyl methacrylate, 4 parts of potassium thiosulfate, 25 parts of Sodium carbonate solution with a mass fraction of 25%, 5 parts of sodium lauryl sulfa...

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Abstract

The invention belongs to the technical field of sealant preparation, and particularly relates to a preparation method of a building sealant. In the preparation process of a tackifying dispersant usedin the invention, corn starch reacts with epoxy chloropropane, and a fatty acid salt can replace a part of an inorganic salt, so the influence of high-salinity concrete is reduced, the gelatinizing density of a water-reducing polymer in concrete is increased, and the plugging performance of the sealant is improved; after a soap-free latex forms a film, no emulsifier migrates to the surface of a film, so the water resistance and cohesiveness of the soap-free latex film are improved, the latex film can be formed in cured sealant stone, and strength and bonding stability at high temperature are improved; the pH value of the raw materials of the water-reducing polymer is adjusted through a saturated sodium silicate solution, so the strength of the polymer is improved, and the high temperatureresistance of the polymer is enhanced; and meanwhile, sodium silicate is dissolved in water to form a colloidal aqueous sodium silicate solution, so the microstructure of plastic slurry and sealant stone is improved, the compactness of the sealant after curing is improved, the bonding strength of the sealant is improved, and the sealant has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of sealant preparation, and in particular relates to a preparation method of building sealant. Background technique [0002] Silicone sealant is a paste made of polydimethylsiloxane as the main raw material, supplemented with crosslinking agent, filler, plasticizer, coupling agent, and catalyst in a vacuum state. Reacts with water in the air and cures to form elastic silicone rubber. It has the advantages of resistance to ultraviolet light and atmospheric aging, heat resistance, low temperature resistance, moisture resistance, etc., and also has excellent chemical stability and electrical insulation properties. Regardless of the cold winter and hot summer, it can still maintain good elasticity in a wide temperature range (-60 ° C ~ 200 ° C), and has excellent adhesion to most substrates. Due to its excellent comprehensive performance and process performance, it can play the role of moisture-proof, earthqua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/26C09J125/14C09J103/08C09J11/06C08F212/08C08F220/56C08F220/14C08F220/18C08F220/58C08F2/44C08K3/34C08B31/12
CPCC08B31/12C08F2/44C08F212/08C08F220/56C08K3/34C08L2201/08C08L2205/03C09J11/06C09J133/26C08L25/14C08L3/08C08K5/098
Inventor 李雪晴
Owner 广州席风机电设备工程有限公司
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