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Epoxy resin expansive type fireproof paint for steel structure and preparation method thereof

A technology of epoxy resin and fireproof coating, which is applied in the direction of epoxy resin coating, fireproof coating, coating, etc., to achieve the effects of improving storage stability, high fireproof efficiency and high yield

Active Publication Date: 2017-05-31
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention aims to solve the deficiencies of the existing fireproof coatings for steel structures, and proposes an epoxy resin expansion type fireproof coating for steel structures and its preparation method

Method used

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  • Epoxy resin expansive type fireproof paint for steel structure and preparation method thereof
  • Epoxy resin expansive type fireproof paint for steel structure and preparation method thereof
  • Epoxy resin expansive type fireproof paint for steel structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Step 1: Preparation of modified polyethyleneimine fire-resistant additives

[0043] Add 100g of polyethyleneimine (PEI) with a molecular weight of 600 to 70,000, 138g of diethyl phosphite and 100ml of dichloromethane into the reactor. Under ice bath conditions, add 185g of carbon tetrachloride and 122g of carbon tetrachloride and 122g dropwise within 6 hours. Triethylamine, after 24 hours of reaction, the crude product was obtained by rotary evaporation. The product was dissolved in 500 ml of distilled water, dialyzed to remove impurities, and then lyophilized to obtain the final product, modified polyethyleneimine (PEI-DEPP).

[0044] by figure 1 of 1 HNMR nuclear magnetic spectrum and figure 2 , image 3 The comparison shows that the amine matrix proton peak of polyethyleneimine PEI appears at 2~3ppm, the pH proton peak of diethyl phosphite is not found at 7.66ppm and 5.93ppm, and the diphosphite diphosphite appears at 1.23ppm and 3.91ppm respectively. Peaks of methyl a...

Embodiment 2

[0053] Step 1: Preparation of modified polyethyleneimine fire-resistant additives

[0054] Add 100g of polyethyleneimine with a molecular weight of 600 to 70,000, 125g of diethyl phosphite and 100ml of dichloromethane into the reactor, and add 185g of carbon tetrachloride and 122g of triethylamine dropwise within 6 hours under ice bath conditions After reaction for 24h, the crude product was obtained by rotary evaporation. The product was dissolved in 500 ml of distilled water, dialyzed to remove impurities, and then lyophilized to obtain the final product, modified polyethyleneimine.

[0055] Step 2: Dissolve 450g of epoxy resin in a solvent of 120g of xylene, 80g of n-butanol, 40g of butyl acetate, and then add 340g of ammonium polyphosphate and 170g of melamine phosphate, which is a catalyst for dehydration into carbon, and 190g of melamine as blowing agent Mix with 95g urea, char-forming agent 120g pentaerythritol and 60g mannitol, 41g expandable graphite, pigments and fillers...

Embodiment 3

[0062] Step 1: Preparation of modified polyethyleneimine fire-resistant additives

[0063] Add 100g of polyethyleneimine with a molecular weight of 600 to 70,000, 138g of diethyl phosphite, and 100ml of dichloromethane into the reactor, and add 185g of carbon tetrachloride and 122g of triethylamine dropwise within 6 hours under ice bath conditions After reaction for 24h, the crude product was obtained by rotary evaporation. The product was dissolved in 500 ml of distilled water, dialyzed to remove impurities, and then lyophilized to obtain the final product, modified polyethyleneimine.

[0064] Step 2: Dissolve 600g epoxy resin in a mixed solvent of 141g xylene, 94g n-butanol, 47g butyl acetate, and then add 420g ammonium polyphosphate and 210g melamine phosphate, which is a catalyst for dehydration to carbon, and 180g melamine as a blowing agent Mix with 90g urea, char-forming agent, 140g pentaerythritol, 70g mannitol, 50g expandable graphite, 45g titanium dioxide, 45g zinc borat...

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Abstract

The invention discloses epoxy resin expansive type fireproof paint for a steel structure and a preparation method thereof, and belongs to functional paint. The expansive type fireproof paint is prepared from an ingredient A and an ingredient B, wherein the ingredient A mainly comprises film forming substances, dehydration carbonizing catalysts, foaming agents, carbonizing agents, auxiliary agents, solvents and pigment fillers; the ingredient B mainly comprises curing agents, modified polyethyleneimine, solvents and auxiliary agents. The prepared fireproof paint uses a diethyl phosphite modified polyethyleneimine as a fireproof auxiliary agent (PEI-DEPP) and uses a compounding technique; the carbon layer expansion times and the carbon layer quality after the fireproof paint burning are effectively improved. The fireproof paint has excellent fireproof performance, bonding force, water resistant performance, heat-resistant performance, corrosion resistant performance and acid-base resistant performance; the fireproof paint can be used for a high-rise steel structure building, and is also applicable to fireproof protection of steel structures, in severe environment, of ocean engineering equipment, petrochemical industry and the like.

Description

Technical field [0001] The invention belongs to the field of fireproof coatings, and relates to an epoxy resin fireproof coating, in particular to an epoxy resin expansion type fireproof coating for steel structures and a preparation method thereof. Background technique [0002] With the continuous development of economy, society and technology, the building materials used by mankind are constantly updated. Compared with brick-concrete buildings, steel structure buildings have obvious advantages in environmental protection, energy saving, high efficiency, and factory production. Therefore, they gradually replace reinforced concrete as the main building form. According to the requirements of the national standard "Code for Fire Protection of Building Design" GB 50016-2014, steel structure buildings must be protected against fire. Intumescent fire retardant coatings are currently widely used as fire protection for steel structure buildings. Intumescent fire retardant coatings expa...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/18C09D7/12C08G73/04
CPCC08L2201/02C08L2201/22C08L2205/035C09D5/185C09D7/61C09D7/63C09D7/70C09D163/00C08L79/02C08K13/04C08K7/24C08K2003/323C08K2003/2227C08K2003/387C08K2003/2241
Inventor 戴李宗邵志恒柳超黄陈曾碧榕许一婷罗伟昂袁丛辉陈国荣
Owner XIAMEN UNIV
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