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Phosphor-nitrogen ultrathin expansion type steel structure fire-resistant coating

A technology for fire-resistant coatings and profile steels, applied in fire-resistant coatings, polyester coatings, polyurea/polyurethane coatings, etc., can solve problems such as insufficient bonding performance, insufficient carbon layer density, poor dispersibility, etc., to avoid dispersibility. Not good, low molecular weight, strong color retention and gloss retention

Active Publication Date: 2009-04-29
应急管理部四川消防研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the flame retardant used in this system is composed of multiple components added directly, it has the disadvantage of poor dispersion during mixing. In addition, the charcoal layer after high-temperature combustion is not dense enough and the bonding performance is poor Not good enough and other shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, completely dissolve 25 parts of modified acrylic resin and 16.5 parts of alkyd resin in a mixed solvent composed of 11 parts of xylene and 12.5 parts of butyl acetate, then add 15 parts of polyurethane resin, stir until dissolved, and then add 51 parts of expansion Flame retardant, 11.5 parts of titanium dioxide, 9 parts of calcium carbonate, and disperse the mixture in a high-speed disperser for 10 minutes, then transfer to a sand mill and grind until the coating fineness is 50-80u.

[0019] When the thickness of the coating coated with this coating is 1.83mm, the measured fire resistance limit is 98min.

Embodiment 2

[0021] First, completely dissolve 27 parts of modified acrylic resin and 18 parts of alkyd resin in a mixed solvent composed of 10 parts of xylene and 11 parts of butyl acetate, then add 17 parts of polyurethane resin, stir until dissolved, and then add 63 parts of expansion Flame retardant, 12 parts of titanium dioxide, 10 parts of calcium carbonate, and disperse the mixture in a high-speed disperser for 10 minutes, then transfer to a sand mill and grind until the coating fineness is 50-80u.

[0022] When the thickness of the coating coated with this coating is 2.43mm, the measured fire resistance limit is 134min.

Embodiment 3

[0024] First, completely dissolve 33 parts of modified acrylic resin and 17 parts of alkyd resin in a mixed solvent composed of 16 parts of xylene and 12 parts of butyl acetate, then add 18 parts of polyurethane resin, stir until dissolved, and then add 67 parts of expansion Flame retardant, 8 parts of titanium dioxide, 11 parts of calcium carbonate, and disperse the mixture in a high-speed disperser for 10 minutes, then transfer to a sand mill and grind until the coating fineness is 50-80u.

[0025] When the thickness of the coating coated with this coating is 2.21mm, the measured fire resistance limit is 121min.

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Abstract

The invention discloses a fire-retardant coating with a phosphor-nitrogen ultra-thin intumescent steel structure. The compositions of the fire-retardant coating with the phosphor-nitrogen ultra-thin intumescent steel structure in portion by weight are 40 to 75 portions of base resin which consists of modified acrylic acid resin, urethane resin and alkyd resin, 50 to 70 portions of intumescent fire retardant, 8 to 12 portions of titanium pigment powder, 8 to 12 portions of calcium carbonate and 18 to 35 portions of mixed solvent which consists of xylene and butyl aetate. The base resin is formed by mixture of a plurality of types of resin and the intumescent fire retardant used is a substance which integrates a charring agent, a foaming agent and char forming catalyst, so that the coating has good fluidity and is convenient in construction; a coating formed is thin and has strong adhesion and high hardness; a charring layer formed after foaming has large thickness and high strength and is uniform and dense; and the phosphor-nitrogen ultra-thin intumescent steel structure fire-retardant coating has strong cementitiousness with a steel structure, can not be broken or dropped off by flame, has superior limit of fire resistance, and can be used for fireproof protection of steel structure buildings such as industrial factory buildings, gymnasiums and highrise.

Description

technical field [0001] The invention belongs to the technical field of fireproof coatings, in particular to a phosphorus-nitrogen ultra-thin expansion fireproof coating for steel structures. Background technique [0002] As we all know, in the technical field of fireproof coatings for steel structures, the fireproof performance of coatings is often directly related to the thickness of the coating, especially for the same coating. In general, thicker coatings have better fire performance than thinner ones. However, under the premise of meeting certain fire protection requirements, thick-coated fire-resistant coatings undoubtedly consume a large amount of paint, high cost, and many times of coating, long construction period, cumbersome process or poor ductility, resulting in the outer surface of the coating The decor is poor. Therefore, this kind of thick-coated fireproof coating has now been replaced by thin-coated steel structure fireproof coatings, especially ultra-thin i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D175/04C09D167/08C09D5/18
Inventor 张翔叶诗茂唐勇毛朝君张帆
Owner 应急管理部四川消防研究所
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