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A kind of intumescent fireproof coating and preparation method thereof

A fire-retardant coating and intumescent technology, applied in fire-resistant coatings, starch derivative coatings, etc., can solve the problems of poor film-forming properties of coatings, high use costs, low expansion multiples, etc., and achieve a simple preparation method, good fireproof effect, The effect of high coefficient of expansion

Inactive Publication Date: 2018-02-23
NORTH CHINA INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the common problem is that the expansion factor is low, and it needs to be painted thicker to achieve a better fireproof effect. Because it needs to achieve a larger thickness, it needs to be painted multiple times, which is labor-intensive and expensive to use.
And they are all colored coatings, which affect the appearance of the substrate in many cases
[0003] At present, the preparation of fire retardant coatings mostly adopts the method of mixing flame retardants and base material resins, but this method is not satisfactory. A large proportion of flame retardants leads to a high expansion multiple, but it brings troubles such as poor film-forming properties of coatings. must compromise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Preparation of intumescent fire retardant coating:

[0015] (1) Preparation of amino resin A: Add 20g of urea, 10g of melamine, 10g of dicyandiamide, and 100mL of formaldehyde into a container, use ethanolamine to adjust the pH value to 8-9, heat to 100°C, boil for 20min, and use water Water is separated by a device to obtain a viscous and transparent amino resin A;

[0016] (2) Preparation of starch phosphate ester B: Add 15g of starch, 15mL of phosphoric acid, and 15mL of water in proportion to the container and heat together, wherein 3mL of phosphoric acid is added at the beginning, and the remaining phosphoric acid is added in three times on average during the heating process, and slowly heated to 95°C. During the heating process, the raw materials in the container first turn into white lumps and then gradually become transparent and thinner. At this time, the moisture content is high. Heat the temperature to 100°C for esterification reaction for 2 hours, and at the...

Embodiment 2

[0019] Preparation of intumescent fire retardant coating:

[0020] (1) Preparation of amino resin A: Add 30g of urea, 10g of melamine, 20g of dicyandiamide, and 120mL of formaldehyde into a container, use ethanolamine to adjust the pH value to 8-9, heat to 100°C, boil for 30min, and use water separation Water is separated by a device to obtain a viscous and transparent amino resin A;

[0021] (2) Preparation of starch phosphate B: add 20g of starch, 40mL of phosphoric acid, and 40mL of water into the container in proportion to heat together, wherein 8mL of phosphoric acid is added at the beginning, and the remaining phosphoric acid is added in three times on average during the heating process, and slowly heated to 95°C. During the heating process, the raw materials in the container first turn into white lumps and then gradually become transparent and thinner. At this time, the water content is high. Heat the temperature to 100°C for esterification reaction for 3 hours, and at ...

Embodiment 3

[0024] Preparation of intumescent fire retardant coating:

[0025] (1) Preparation of amino resin A: Add 40g of urea, 20g of melamine, 20g of dicyandiamide, and 140mL of formaldehyde into a container, adjust the pH value to 8-9 with ethanolamine, heat to 102°C, boil for 30min, and use water separation Water is separated by a device to obtain a viscous and transparent amino resin A;

[0026] (2) Preparation of starch phosphate B: add 25g of starch, 25mL of phosphoric acid, and 50mL of water into the container in proportion to heat together, wherein 5mL of phosphoric acid is added at the beginning, and the remaining phosphoric acid is added in three times on average during the heating process, and slowly heated to 100°C. During the heating process, the raw materials in the container first turn into white lumps and then gradually become transparent and thinner. At this time, the moisture content is high. Heat the temperature to 105°C for esterification reaction for 4 hours, and a...

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Abstract

The invention relates to an intumescent fireproof coating and a preparation method thereof. The raw materials are composed of amino resin A and starch phosphate B, and the amino resin A and starch phosphate B are mixed at a mass ratio of 1:1-2 to form an intumescent fireproof coating. Coating; amino resin A raw material is composed of urea, melamine, dicyandiamide and formaldehyde, and the solid-liquid ratio of described urea, melamine, dicyandiamide and formaldehyde is 2-5g: 1-2g: 1-3g: 10-15mL, The concentration of formaldehyde is 34%-41%; the raw material of starch phosphate ester B consists of starch, 85% phosphoric acid and water, and the solid-liquid ratio of starch, 85% phosphoric acid and water is 1g: 1-2mL: 1- 2mL. The paint of the invention is colorless and transparent, has low price and high expansion coefficient, belongs to ultra-thin fireproof paint, and has simple preparation method.

Description

technical field [0001] The invention relates to the field of coatings, in particular to an intumescent fireproof coating and a preparation method thereof. Background technique [0002] Combustible and non-high-temperature-resistant materials such as wood, polymer materials, and steel account for a large proportion of building materials. Combustible materials are the main reason for the occurrence and spread of fire. Due to the large thermal conductivity of steel, the temperature of steel will rise sharply when fire occurs. When the temperature is 400-600℃, the load-bearing capacity of the steel structure will drop sharply, which will cause a series of accidents. Fireproof treatment of the above materials can effectively inhibit the spread of fire and increase the fire resistance time of the steel structure in a fire. Fire retardant coatings are further divided into intumescent and non-expandable, among which intumescent is better. At present, there are many domestic manufa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D161/20C09D103/06C09D5/18
Inventor 高明晁春艳陈伟
Owner NORTH CHINA INST OF SCI & TECH