Scrape-resistant expandable graphite water-based ultra-thin fire-resistant coating for steel structures and preparation method thereof

Abstract

The invention discloses a scrape-resistant expandable graphite water-based ultra-thin fire-resistant coating for steel structures, prepared from the following raw materials in parts by weight: 20-22 parts of ammonium polyphosphate, 7-8 parts of pentaerythritol, 7-8 parts of melamine, 4-5 parts of expandable graphite, 3-3.5 parts of chlorinated paraffin, 23-25 parts of a 0.1Mol / L zinc nitrate water solution, 23-25 parts of a 0.1Mol / L hexamethylenetetramine water solution, 0.8-1 part of ethyl orthosilicate, 1.6-1.8 parts of lithium metasilicate, a proper amount of water, 42-43 parts of methyl methacrylate, 3-3.5 parts of graphene, 1.2-1.5 parts of molybdenum disulfide nanosheets, 3-4 parts of gelatin and 0.6-0.8 part of barium fluoride. The gelatin is used for modifying the graphene, molybdenum disulfide nanosheets and barium fluoride, so the graphene, molybdenum disulfide nanosheets and barium fluoride are uniformly dispersed in the coating, and the compactness, waterproofness, rotproofness and especially scrape resistance of a coating layer are greatly improved.

Description

technical field [0001] The invention relates to the technical field of fireproof coatings, in particular to a scratch-resistant expandable graphite water-based ultra-thin steel structure fireproof coating and a preparation method thereof. Background technique [0002] Solvent-based ultra-thin steel structure fireproof coatings contain a large amount of volatile organic compounds (VOC), and their application is increasingly restricted, and even banned by developed countries. The water-based ultra-thin steel structure fireproof coating uses water-based polymers as film-forming substances, which reduces the emission of VOC, reduces the harm to the human body and the pollution to the environment in the production, construction, application and other links of the coating, and meets the requirements of energy saving, emission reduction, The development trend of green environmental protection is the focus of research on fire retardant coatings. This paper has conducted in-depth re...

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Problems solved by technology

[0003] "Preparation of water-based ultra-thin steel structure fireproof coating and research on fireproof mechanism" The fireproof coating obtained in the article contains a large number of phosphoric acid groups and has a high water absorption rate, which is easy to cause corrosion of coatings and metals. The compatibility between expandable graphite and organic polymers is poor. , the strength of the coating is not enough, it needs to be improved, and the scratch resistance of the coating needs to be improved