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Intumescent water-based fireproof coating and preparation method thereof

An intumescent technology for fire-resistant coatings, applied in the direction of fire-resistant coatings, anti-corrosion coatings, coatings, etc., can solve the problems of impact resistance, poor tensile performance, no corrosion protection function, low bonding strength of coatings, etc., to achieve Good toughness, improved heat insulation efficiency, and enhanced water vapor barrier performance

Active Publication Date: 2020-07-10
NANJING CHANGJIANG PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main technical problems faced by intumescent water-based fireproof coatings are: (1) The fire resistance performance is overly dependent on flame retardants, resulting in high pigment-base ratio, loose coating, low coating bonding strength, poor impact resistance and tensile performance. (2) The resin system and flame retardant system introduce a large number of polar groups, resulting in high water absorption of the coating, poor early water resistance (easy to fall off during construction), easy to swell and deform, It is easy to accelerate metal corrosion; (3) The carbonization is unstable and the fire resistance time is short; (4) The durability is poor, and the fire resistance limit decreases significantly with the extension of the service time; (5) The construction is not good, and the thick coating is easy to crack

Method used

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  • Intumescent water-based fireproof coating and preparation method thereof
  • Intumescent water-based fireproof coating and preparation method thereof
  • Intumescent water-based fireproof coating and preparation method thereof

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the examples, but the protection scope of the present invention is not limited thereto. The preparation steps of the water-based fireproof coating coating of embodiment 1~3 and comparative example 1~3 are as follows (material proportion sees Table 1):

[0036] (1) Preparation of aqueous dispersion of polyurethane prepolymer: Add polyether polyol, polycarbonate diol, 1,4-butanediol, and dimethylol propionic acid into a nitrogen-filled reactor, Vacuum dehydration; lower the temperature to below 80°C, add butanone to dissolve the material; dilute hexamethylene diisocyanate and diphenylmethane diisocyanate with butanone and slowly drop into the reactor; add di-n-butyltin dilaurate, Stir the reaction at 80°C for 4h; cool the system to 50°C, add hydroquinone and β-hydroxypropyl acrylate to continue the reaction for 3h; add triethylamine to neutralize the reaction system, add water, stir at high speed to...

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Abstract

The invention discloses an intumescent water-based fireproof coating and a preparation method thereof. The coating is a water-based, single-component and self-drying product, and is prepared from polyurethane-vinyl acetate-acrylate copolymer emulsion, a modified composite flame retardant, precipitated barium sulfate, mica powder, an auxiliary agent and water. The coating is convenient to construct, low in VOC emission, low in smoke and halogen-free, and is an environment-friendly substitute of a high-performance solvent type fireproof coating.

Description

technical field [0001] The invention relates to the field of fireproof coatings, in particular to an intumescent water-based fireproof coating with impact resistance, stretch resistance and bending resistance and a preparation method thereof. Background technique [0002] Steel structure fireproof coating is a functional coating applied to the surface of steel substrates. In case of fire, it can reduce the temperature rise rate of steel through flame retardancy and heat insulation, prevent rapid deformation and collapse of steel structures, and improve the disaster resistance of steel structures. At present, there are many types of commercialized fire retardant coatings. According to the dispersion medium, it can be divided into water-based and solvent-based; according to the application film thickness, it can be divided into: thick type, thin type, ultra-thin type; according to the fire resistance and heat insulation mechanism, it can be divided into: expansion type and non...

Claims

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Application Information

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IPC IPC(8): C09D151/08C09D179/00C09D5/18C09D5/08C09D7/61C09D7/20C08F283/00C08G18/66C08G18/44C08G18/48C08G18/34C08G18/32
CPCC08F283/006C08G18/3206C08G18/348C08G18/4018C08G18/44C08G18/48C08G18/6692C08K2003/2224C08K2003/2227C08K2003/323C08L2201/02C08L2201/22C09D5/08C09D5/185C09D151/08C09D7/20C09D7/61C08F218/08C08F220/14C08F212/08C08L79/00C08K13/06C08K9/04C08K5/06C08K3/32C08K5/34922C08K3/22C08K3/34
Inventor 陈钊聪张卫中
Owner NANJING CHANGJIANG PAINT