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Nanometer fire retardant coating and preparation method thereof

A kind of fireproof coating, nanotechnology, applied in the direction of fireproof coatings, coatings, etc., can solve the problems of too little addition, reduced fireproof efficiency, unreasonable formula components, etc., and achieve the effect of scientific preparation method

Active Publication Date: 2014-05-21
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many deficiencies in this fireproof coating. First of all, although the addition of nano-SiO 2 Particles can only be used as auxiliary flame retardant and hydrophobic formula components due to too little addition, and cannot exert their unique excellent effects, which will hinder the decomposition of the active ingredient polyamine polyphosphate and release more inert gases; secondly, the formula The components are unreasonable, and the fire-proof coating composed of it cannot form a ceramic-like covering layer on the surface of the coating after high-temperature baking, which reduces the fire-proof performance

Method used

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  • Nanometer fire retardant coating and preparation method thereof
  • Nanometer fire retardant coating and preparation method thereof
  • Nanometer fire retardant coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The specific steps of preparation are:

[0031] Step 1. Firstly, the inorganic nanoparticles are added to the 10wt% sodium silicate aqueous solution to ultrasonically disperse for 10 minutes and then stirred for 2 hours to obtain a mixed solution; wherein the inorganic nanoparticles are calcium carbonate. Then the mixed solution under stirring was adjusted to pH 5 with acid at 75° C., and then aged for 4 hours to obtain a mixed sol; wherein the acid was hydrochloric acid.

[0032] In step 2, the mixed sol is suction filtered and washed three times, and then dried at 120° C. for 12 hours to obtain composite particles. Then, the composite particles and the silane coupling agent were added to ethanol at 130°C under stirring and refluxed for 60 minutes to obtain a reaction solution; wherein the weight ratio of ethanol, composite particles and silane coupling agent in the reaction solution was 75: 22:1.

[0033] Step 3. After the reaction solution is washed and separated alternat...

Embodiment 2

[0035] The specific steps of preparation are:

[0036] In step 1, firstly, the inorganic nanoparticles are added to a 20wt% sodium silicate aqueous solution to be ultrasonically dispersed for 15 minutes and then stirred for 2.5 hours to obtain a mixed solution; wherein the inorganic nanoparticles are calcium carbonate. Then, the mixed solution under stirring was adjusted to pH 6 with acid at 78° C., and then aged for 4.3 hours to obtain a mixed sol; wherein the acid was hydrochloric acid.

[0037] In step 2, the mixed sol is suction filtered and washed three times, and then dried at 125° C. for 11 hours to obtain composite particles. Then, the composite particles and the silane coupling agent were added to ethanol at a temperature of 133°C under stirring and refluxed for 50 minutes to obtain a reaction solution; wherein the weight ratio of ethanol, composite particles and silane coupling agent in the reaction solution was 78: 21:1.

[0038] Step 3. First, the reaction solution is w...

Embodiment 3

[0040] The specific steps of preparation are:

[0041] Step 1. Firstly, the inorganic nanoparticles are added to a 35wt% sodium silicate aqueous solution and ultrasonically dispersed for 20 minutes and then stirred for 3 hours to obtain a mixed solution; wherein the inorganic nanoparticles are calcium carbonate. Then, the mixed solution under stirring was adjusted to pH 7.5 with acid at 80° C., and then aged for 4.5 hours to obtain a mixed sol; wherein the acid was hydrochloric acid.

[0042] In step 2, the mixed sol was filtered and washed four times with suction, and then dried at 130°C for 10 hours to obtain composite particles. Then, the composite particles and the silane coupling agent were added to ethanol at a temperature of 135°C under stirring and refluxed for 45 minutes to obtain a reaction solution; wherein the weight ratio of ethanol, composite particles and silane coupling agent in the reaction solution was 80: 20:1.

[0043] Step 3: After the reaction solution is wash...

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Abstract

The invention discloses a nanometer fire retardant coating and a preparation method thereof. The coating comprises inorganic filler, a film-forming agent, a firm-forming aid, a plasticizer, a cross-linking agent and a drier, wherein the inorganic filler is a modified nanometer composite particle of an inorganic nanometer particle of which the surface is covered with silicon dioxide particles. The preparation method comprises the following steps of: adding the inorganic nanometer particle to a sodium silicate aqueous solution; agitating; adjusting with acid; ageing to obtain mixed sol; performing suction filtration and washing for the mixed sol; drying to obtain the composite particle; sequentially adding the composite particle and a silane coupling agent to ethanol while stirring to perform reflux reaction so as to obtain reaction liquid; alternately centrifugally washing and separating the reaction liquid with ethanol to obtain the modified nanometer composite particle; and then mixing the modified nanometer composite particle, the firm-forming agent, the firm-forming aid, the plasticizer, the cross-linking agent and the drier and performing ball milling, so as to obtain the target product. The nanometer fire retardant coating can perform endothermic reaction to produce a ceramic heat insulating layer in different stages of a fire, and can be widely applied to various situations requiring fire resistance and inflaming retarding performance.

Description

Technical field [0001] The invention relates to a fireproof coating and a preparation method, in particular to a nano fireproof coating and a preparation method. Background technique [0002] With the continuous acceleration of economic construction, various large-scale industrial facilities, commercial buildings, and underground buildings have gradually increased, and the potential fire hazards have also increased. In order to prevent and reduce fire damage, people often apply various fireproof coatings on the surface of corresponding facilities and buildings to form a fireproof coating to keep the internal structure of the coating intact within a certain period of time. Recently, people have made unremitting efforts to obtain various fireproof coatings with excellent performance, such as an "environmentally friendly nano fireproof coating" disclosed in the Chinese invention patent application document CN 101747693A published on June 23, 2010. The fireproof coating mentioned in...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D133/00C09D161/20C09D125/14C09D133/04C09D5/18
Inventor 王欢张献田兴友郑康刘香兰包超顾振薛萌
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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