Preparation method of nano calcium carbonate for odorless oxime-removed silicone adhesive

A technology of deodorizing oxime silicone glue and nano-calcium carbonate, which is applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc. odor and other problems, to achieve excellent mechanical properties, significant deodorant effect, and reduce the release of ketoxime

Active Publication Date: 2018-11-30
ANHUI PROVINCE XUNCHENG CITY HUANA NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common silicone adhesives are mainly divided into deoxime type, dealcoholized type and deacidified type. Among them, deoxime type silicone adhesives are widely used and have the advantages of high strength, good adhesion, stable storage and fast curing speed. The reason is that the butanone oxime released by curing has an odor, is irritating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of nano-calcium carbonate for odorless deoximation silicone glue includes the following steps:

[0032] (1) Limestone calcination and quicklime digestion: the limestone is crushed to a size of 2-3 cm by a jaw crusher, and the limestone is calcined at a high temperature of 1100°C for 400 minutes to obtain quicklime. The quicklime and water are digested according to the mass ratio of 1:11. , The obtained lime slurry is screened with 100 meshes to remove waste residue, then the lime slurry is adjusted to a solid content of 10.5%, and aged for 24h;

[0033] (2) Carbonation reaction: transport the lime slurry obtained in step (1) to the carbonation reaction tower, adjust the temperature of the lime slurry to 21°C, adjust the stirring rate to 1500r / min, add quicklime with a mass ratio of 0.08% sucrose, and then pass Into the lime kiln tail gas to start carbonation reaction, control the flow of carbon dioxide to 2m 3 / h, the carbon dioxide concentration is 33%,...

Embodiment 2

[0037] A preparation method of nano-calcium carbonate for odorless deoximation silicone glue includes the following steps:

[0038] (1) Limestone calcination and quicklime digestion: The limestone is crushed to a size of 2-3 cm by a jaw crusher, and the limestone is calcined at a high temperature of 1200°C for 350 minutes to obtain quicklime. The quicklime and water are digested according to the mass ratio of 1:7. , The obtained lime slurry is sifted through 100 mesh to remove waste residue, then the lime slurry is adjusted to a solid content of 12.5%, and aged for 48h;

[0039] (2) Carbonation reaction: transport the lime slurry obtained in step (1) to the carbonation reaction tower, adjust the temperature of the lime slurry to 24°C, adjust the stirring rate to 1000r / min, add quicklime with a mass ratio of 0.1% sucrose, and then pass Into the lime kiln tail gas to start carbonation reaction, control the flow of carbon dioxide to 3m 3 / h, the carbon dioxide concentration is 25%, wh...

Embodiment 3

[0043] A preparation method of nano-calcium carbonate for odorless deoximation silicone glue includes the following steps:

[0044] (1) Limestone calcination and quicklime digestion: the limestone is crushed to a size of 2-3 cm by a jaw crusher, and the limestone is calcined at a high temperature of 1000 ℃ for 500 minutes to obtain quicklime. The quicklime and water are digested according to the mass ratio of 1:12 , The obtained lime slurry is screened with 100 meshes to remove waste residue, then the lime slurry is adjusted to a solid content of 11.5%, and aged for 36h;

[0045] (2) Carbonation reaction: transport the lime slurry obtained in step (1) to the carbonation reaction tower, adjust the temperature of the lime slurry to 23°C, adjust the stirring rate to 500r / min, add quicklime with a mass ratio of 0.05% sucrose, and then pass Into the lime kiln tail gas to start carbonation reaction, control the flow of carbon dioxide to 2m 3 / h, the carbon dioxide concentration is 30%, w...

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Abstract

The invention discloses a preparation method of nano calcium carbonate for an odorless oxime-removed silicone adhesive. The preparation method comprises the following steps: calcining limestone and digesting quick lime and diluting to obtain lime slurry with the solid content of 10 to 13 percent; carrying out carbonization reaction on the lime slurry, so as to obtain nano calcium carbonate suspension; conveying the nano calcium carbonate suspension to a surface treatment device adding a compound surfactant composed of sodium stearate and sodium laurate under a high-speed heating condition; stirring and carrying out surface modification; then adding aluminum silicate and iron oxide and continually stirring for 30 to 90min to finish surface treatment, so as to obtain modified calcium carbonate slurry; dehydrating, drying and crushing the modified calcium carbonate slurry to obtain the product. According to a modification method of the calcium carbonate, the dispersity of the calcium carbonate in the silicone adhesive can be effectively improved, and the nano calcium carbonate also can be used for extremely reducing the release of oxime in a curing process of the filled silicone adhesive under the cooperative effect of physical adsorption of the aluminum silicate and reduction reaction of iron oxide powder, and the odor-removal effect is remarkable.

Description

Technical field [0001] The invention relates to the technical field of nano material modification, in particular to a preparation method of nano calcium carbonate for odorless deoxime silicone glue. Background technique [0002] Room temperature curing silicone sealant is a paste made of dihydroxy polydimethylsiloxane as the main raw material, supplemented by plasticizer, filler, crosslinking agent, coupling agent and catalyst. It passes at room temperature It solidifies with moisture in the air to form an elastomer, which has good adhesion to many materials. Common silicone glues are mainly divided into deoxime type, dealcoholization type and deacidification type. Among them, deoxime type silicone glue is widely used and has the advantages of high strength, good adhesion, stable storage and fast curing speed. It is that the methyl ethyl ketoxime released by curing has a odor, which is irritating to human eyes, nose, throat, and mucous membranes, and is corrosive to metals such ...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/08C09C3/06C08K9/02C08K9/04C08K3/26C08L83/04
CPCC08K3/26C08K9/02C08K9/04C08K2003/265C08K2201/011C08L83/04C09C1/021C09C3/006C09C3/06C09C3/08
Inventor 梁力朱勇苏齐全
Owner ANHUI PROVINCE XUNCHENG CITY HUANA NEW MATERIAL TECH CO LTD
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