Reinforced flame-retardant powder for sealant and preparation method and application of reinforced flame-retardant powder

A technology of sealants and flame retardant powders, applied in adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of high price, poor compatibility, unfavorable processing, etc., and achieve good fluidity or thixotropy , Avoid moisture absorption and moisture, excellent organic compatibility effect

Active Publication Date: 2020-11-13
JIANGXI GUANGYUAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flame retardants are mainly divided into two types: physical mixing additive type and reactive flame retardant type, mainly including magnesium hydroxide, tributyl phosphate, trichlorobromomethane, etc. Among them, inorganic flame retardants such as magnesium hydroxide and aluminum hydroxide are relatively expensive. Low, but compared with conventional fillers, the price is still high, and the compatibility with organic resins is poor, and the hygroscopicity is strong, which is not conducive to post-processing

Method used

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  • Reinforced flame-retardant powder for sealant and preparation method and application of reinforced flame-retardant powder
  • Reinforced flame-retardant powder for sealant and preparation method and application of reinforced flame-retardant powder
  • Reinforced flame-retardant powder for sealant and preparation method and application of reinforced flame-retardant powder

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preparation example Construction

[0024] The invention provides a method for preparing a reinforced flame-retardant powder for sealants, comprising the following steps:

[0025] Grinding brucite to obtain finely ground brucite;

[0026] After mixing the ground brucite, the first modifier and the crystal form inducer, the first modification is performed to obtain the modified brucite; the first modifier is 3-aminopropyltrimethoxy One or more of methoxysilane, 3-methacryloxypropyltrimethoxysilane and ethylenediaminetetraacetic acid;

[0027] mixing the modified brucite and milk of lime for deposition and coating to obtain a coating liquid;

[0028] Immediately add a second modifier to the coating liquid to carry out the second modification to obtain the reinforced flame retardant powder for the sealant; the second modifier is aluminate, stearic acid One or more of sodium, hydrogenated rosin and sodium dodecylbenzenesulfonate.

[0029] The present invention grinds brucite to obtain finely ground brucite;

[0...

Embodiment 1

[0075] Brucite (mass content of magnesium hydroxide is 88%) is washed and broken, and ground to 6000 mesh by jet mill to obtain finely ground brucite;

[0076] 3-Aminopropyltrimethoxysilane, EDTA and MgSO 4 Mix evenly with a small amount of water and add it to a high-speed mixer together with ground brucite powder. Under the conditions of 2000r / min and 80°C, carry out the first modification for 25 minutes. After modification, pass through a 300-mesh sieve to obtain modified water. Magnesite is reserved; the quality of 3-aminopropyltrimethoxysilane is 1% of the mass of ground brucite, EDTA and MgSO 4 Each is 0.01% of the mass of ground brucite;

[0077] Calcite (the mass content of calcium carbonate is 97%) is cleaned and crushed, calcined at 1100° C. to obtain quicklime, and water with 5 times the quality of quicklime is added for digestion. The stirring speed during digestion is 60 r / min. After the digestion is completed, the digested feed liquid is passed through After bei...

Embodiment 2

[0091] Brucite (magnesium hydroxide mass content is 89%) is washed and broken, and ground to 6000 mesh by jet mill to obtain finely ground brucite;

[0092] Mix 3-methacryloyloxypropyltrimethoxysilane and glucose with a small amount of water and add them to the high-speed mixer together with ground brucite. Under the conditions of 2500r / min and 110℃, the first Modified for 20 minutes, passed through a 300-mesh sieve after modification to obtain modified brucite for subsequent use, wherein the quality of 3-methacryloxypropyltrimethoxysilane is 1% of the quality of ground brucite, and the quality of glucose is 0.015% of the mass of ground brucite powder;

[0093] Calcite (calcium carbonate mass content is 97%) is washed and crushed, calcined into quicklime at 1100°C, and then digested by adding water with 5 times the quality of quicklime. The stirring speed during digestion is 60r / min. After being separated and refined by the stage hydrocyclone, let it stand and cool down to ro...

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Abstract

The invention provides reinforced flame-retardant powder for a sealant and a preparation method and application of the reinforced flame-retardant powder, and belongs to the technical field of sealantauxiliaries. The method comprises the following steps: connecting a crystal form inducer to levigated brucite by using a first modifier so that the crystal form inducer uniformly coats the surface ofthe levigated brucite; meanwhile, the crystal form inducer can induce calcium carbonate generated in the deposition coating process to be loaded on the modified brucite in a certain morphology, that is, the morphology of the brucite is modified so that the brucite has spherical, cubic and other morphologies, and the brucite is endowed with better fluidity or thixotropy. After deposition and coating are completed, a second modifier is immediately added for modification, the brucite is uniformly and firmly coated with the second modifier through a large number of hydroxyl groups existing on thesurface of calcium carbonate which is just formed, and therefore the final powder has excellent organic compatibility and can be better combined with resin.

Description

technical field [0001] The invention relates to the technical field of sealant additives, in particular to a reinforcing flame-retardant powder for sealant and its preparation method and application. Background technique [0002] With the development of society and the continuous improvement of people's living standards, people also put forward higher requirements for the aesthetics of buildings and decorations and other functions besides comfort. While various decorative materials bring convenience to people's lives, there are also various fire hazards. [0003] Architectural decoration and decoration are inseparable from sealants. Traditional sealants are prepared from resins, additives, and fillers such as calcium carbonate, quartz powder, and diatomaceous earth; among them, the amount of fillers added is generally relatively large, which not only plays a basic The filling function of the body also plays a reinforcing role in various performances of the sealant. If the ...

Claims

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Application Information

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IPC IPC(8): C09J11/04C09J183/04
CPCC08K2003/2227C08K2003/265C08K2201/011C08L2201/02C08L2205/025C08L2205/03C09J11/04C09J183/04C08L91/06C08L83/04C08K13/06C08K9/12C08K9/06C08K9/10C08K9/04C08K3/26C08K3/22
Inventor 周峰吴平飞李海滨彭鹤松邓鹏吴维冰
Owner JIANGXI GUANGYUAN CHEM
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