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Fireproof coating for self-repairing type steel structure and preparation method thereof

A fire-retardant coating and self-repairing technology, applied in fire-resistant coatings, anti-corrosion coatings, polyurea/polyurethane coatings, etc., can solve the problems of poor durability, cracking, and poor fire performance, and achieve increased durability, reduced dosage, Guaranteed self-healing effect

Active Publication Date: 2016-12-14
湖北合聚高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a self-repairing steel structure fireproof coating and its preparation method to solve the problems of cracking, poor durability, and poor fireproof performance in the prior art. The fireproof coating has a large adhesion to the substrate, Excellent fire performance, excellent surface decoration and corrosion resistance, good self-repair function, etc., and the preparation method involved is simple, suitable for popularization and application

Method used

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  • Fireproof coating for self-repairing type steel structure and preparation method thereof

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preparation example Construction

[0034] The preparation method of described epoxy resin microcapsules is: add 10g urea and 27g 37% formaldehyde aqueous solution in the flask, make urea dissolve completely by magnetic stirring action; After the obtained solution is mixed evenly, adjust the pH value of the solution with triethylamine 8-9, keep a constant temperature of 70°C, react for 1-1.5h, and obtain a viscous milky white wall material; dilute 33g of epoxy resin E44 with 3g of diluent 692 in advance, and add sodium dodecylsulfonate aqueous solution (0.4 g sodium dodecylsulfonate and 10mL deionized water), stirred at 1000r / min for 20 minutes to obtain the core material; under stirring, the gained milky white wall material was added to the core material, and then 1g of resorcinol was added Phenol was stirred, and 0.1g of defoamer n-octanol was added dropwise, and the pH value of the system was adjusted to 3-4 after stirring evenly, and reacted at 60°C for 3 hours; the obtained product was washed with distilled ...

Embodiment 1

[0037] A self-repairing steel structure fireproof coating, the components and their mass percentages are: epoxy modified water-based polyurethane emulsion 20%, melamine formaldehyde resin microencapsulated ammonium polyphosphate 35%, polyurethane microencapsulated inorganic particles 15%, self-healing microcapsules 15%, hydroxyethyl cellulose 0.5%, dispersant 0.5%, defoamer 0.5%, antifungal agent 1%, n-octanol 0.5%, and the rest is water (deionized water); The preparation method of the self-repairing steel structure fireproof coating comprises the following steps:

[0038] 1) weighing each component according to the mass percentage of each component, grinding melamine microencapsulated ammonium polyphosphate and polyurethane microencapsulated inorganic particles into powder, adding deionized water, and fully grinding;

[0039] 2) Add hydroxyethyl cellulose, defoamer, dispersant and antifungal agent, and fully grind;

[0040] 3) adding epoxy-modified water-based polyurethane e...

Embodiment 2

[0042] A self-repairing steel structure fireproof coating, the components and their mass percentages are: epoxy modified water-based polyurethane emulsion 25%, melamine formaldehyde resin microencapsulated ammonium polyphosphate 30%, polyurethane microencapsulated inorganic particles 20%, self-healing microcapsules 10%, hydroxyethyl cellulose 1%, dispersant 0.5%, defoamer 0.5%, antifungal agent 1%, n-octanol 1%, and the rest is water (deionized water). Its preparation method is identical with embodiment 1.

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Abstract

The invention discloses a fireproof coating for a self-repairing type steel structure. The fireproof coating is prepared by taking the following materials as raw materials: epoxy modified waterborne polyurethane emulsion, melamino-formaldehyde resin microencapsulation ammonium polyphosphate, polyurethane microencapsulation inorganic substance grains, self-repairing microcapsule, hydroxyethyl cellulose, dispersing agent, defoamer, mildew preventive, n-octyl alcohol and water. The invention can effectively solve the problems of cracking, poor durability and poor waterproof property of the prior art; the fireproof coating has the advantages of large adhesive force with substrate, excellent fireproof performance, excellent surface decorative property, excellent corrosion resistance and excellent self-repairing function; and the preparation method provided by the invention is simple and is fit for popularization and application.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a self-repairing fireproof coating for steel structures and a preparation method thereof. Background technique [0002] With the wide application of steel in the construction industry, its fire protection issues are increasingly concerned. Applying fire-resistant coatings is convenient in construction, light in weight, low in cost, not limited by the geometric shape of components, has the widest application range and the highest efficiency. The ultra-thin steel structure fire retardant coating is ultra-thin, which greatly reduces the amount of thicker and thin steel structure fire retardant coatings, thereby reducing the total project cost, and has finer viscosity, thinner coating, convenient construction, and decorative properties. better features. While meeting fire protection requirements, it can also meet high decorative requirements, especially for exposed steel structures. Howeve...

Claims

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Application Information

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IPC IPC(8): C09D5/18C09D5/08C09D175/08C09D7/12
CPCC08L2201/02C09D5/08C09D5/18C09D7/65C09D7/70C09D175/08C08L1/284C08K13/06C08K9/10C08K2003/323C08K2003/265
Inventor 刘治田代梦琴张旗胡清华
Owner 湖北合聚高分子材料有限公司
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