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High-hardness heat-resistant intumescent fireproof coating and preparation method thereof

A fire retardant coating, intumescent technology, applied in the field of flame retardant, can solve the problems of large usage, thick coating, affecting use, etc., to achieve the effects of weakened moisture absorption, excellent flow performance, and improved fire resistance time

Inactive Publication Date: 2019-08-30
SHIFANG TAIFENG NEW FLAME RETARDANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the expansion ratio of inorganic fireproof coatings is low, the coating is thick, the usage is huge, the fireproof effect is not good, and aluminum dihydrogen phosphate has a certain viscosity, which affects its use.

Method used

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  • High-hardness heat-resistant intumescent fireproof coating and preparation method thereof
  • High-hardness heat-resistant intumescent fireproof coating and preparation method thereof

Examples

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preparation example Construction

[0014] A preparation method of a high-hardness heat-resistant expansion type fireproof coating, comprising: (1) preparation of modified aluminum dihydrogen phosphate: adding dropwise a silane coupling agent hydrolyzed by alcohol to aluminum dihydrogen phosphate. It should be noted that, in this embodiment, the alcohol hydrolysis of the silane coupling agent includes: using a hydroalcoholic solution whose mass is twice that of the silane coupling agent to perform alcohol hydrolysis on the silane coupling agent. Wherein, the mass ratio of water and alcohol in the hydroalcoholic solution is 1:1. To play a role in ensuring the stability of the solution after silane hydrolysis.

[0015] In this embodiment, the silane coupling agent further includes at least one of KH560, phenyltrimethoxysilane and A171. It should be noted that the inventors found that the special functional groups of the above-mentioned silane coupling agents have a certain activity, and the phenyl group containin...

Embodiment 1

[0023] This embodiment provides a method for preparing a high-hardness heat-resistant expansion type fireproof coating, including:

[0024] (1) Preparation of modified aluminum dihydrogen phosphate: Weigh a certain amount of aluminum dihydrogen phosphate, add 2% alcohol-hydrolyzed phenyltrimethoxysilane dropwise to it under stirring in a kneader, then heat up to 80°C and stir After reacting for 1 h, 0.5% hydrogen-containing silicone oil was added dropwise, and the temperature was raised to 150° C. and stirred for 0.5 h.

[0025] (2) Preparation of fire retardant coating: Take 25 parts of distilled water, add 0.5 parts of dispersant, 4 parts of titanium dioxide, 0.5 parts of leveling agent, 30 parts of composite flame retardant (among which modified Aluminum dihydrogen phosphate is 2.7 parts, ternary system is 27.3 parts), increase the stirring speed to 2000r / min, stir for 20min, then reduce the speed to 1000r / min, add 39.5 parts of acrylic acid emulsion, 0.5 parts of defoamer,...

Embodiment 5

[0039] This embodiment provides a method for preparing a high-hardness heat-resistant expansion type fireproof coating, including:

[0040] (1) Preparation of modified aluminum dihydrogen phosphate: Weigh a certain amount of aluminum dihydrogen phosphate, add 2% alcohol-hydrolyzed phenyltrimethoxysilane dropwise to it under stirring in a kneader, then heat up to 80°C and stir After reacting for 1 h, 0.5% hydrogen-containing silicone oil was added dropwise, and the temperature was raised to 150° C. and stirred for 0.5 h.

[0041] (2) Preparation of fire retardant coating: Take 25 parts of distilled water, add 0.5 parts of dispersant, 4 parts of titanium dioxide, 0.5 parts of leveling agent, 30 parts of composite flame retardant (among which modified 7 parts of permanent aluminum dihydrogen phosphate, 23 parts of ternary system), increase the stirring speed to 2000r / min, stir for 20min, then reduce the speed to 1000r / min, add 39.5 parts of acrylic emulsion, 0.5 parts of defoamer...

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Abstract

The invention belongs to the technical field of flame retardants, and provides a high-hardness heat-resistant intumescent fireproof coating and a preparation method thereof. The preparation method comprises the following steps: (1) preparing modified aluminum dihydrogen phosphate: adding a silane coupling agent hydrolyzed by an alcohol into aluminum dihydrogen phosphate; performing heating and stirring for a reaction; adding hydrogen-containing silicone oil dropwise; and performing heating and stirring for a reaction; and 2) preparing the fireproof coating: adding a dispersant, titanium dioxide, a levelling agent and a composite flame retardant into distilled water under stirring, wherein the composite flame retardant comprises a ternary system and modified aluminum dihydrogen phosphate; improving a stirring speed, performing stirring, reducing the stirring speed, adding an acrylic emulsion and an antifoaming agent, and performing stirring. According to the method provided by the invention, the high-hardness heat-resistant intumescent fireproof coating prepared by adopting the method has a larger foaming ratio and a hard foaming layer after being burned, ensures the complete performance of a carbon layer, and improves the fire-resistant time of the coating layer.

Description

technical field [0001] The invention belongs to the technical field of flame retardancy, and in particular relates to a high-hardness heat-resistant expansion type fireproof coating and a preparation method thereof. Background technique [0002] The intumescent fire retardant coating is a porous carbonized thermal barrier, which has the characteristics of low thermal conductivity, high-efficiency heat preservation, and prevents heat transfer and oxygen diffusion. The change of thermal resistance of intumescent fire retardant coatings can be roughly divided into four stages, namely inert stage, transition stage, stable stage and post-austenitization stage. Fire retardant coatings enter a so-called stabilization period when all combustibles in the coating structure are burned. At this stage, the thermal resistance provided by the coating remains at a constant value. The carbon layer structure after austenitization looks like a very brittle and inconsistent material. In the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/18C09D133/00C09D7/62C09D7/61C09D7/63
CPCC08K2003/2241C08K2003/323C09D5/185C09D7/61C09D7/62C09D7/63C09D133/00C08K13/06C08K9/06C08K5/34922C08K5/053C08K3/32C08K3/22
Inventor 袁明强黄剑陈荣义何杰
Owner SHIFANG TAIFENG NEW FLAME RETARDANT
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