Novel rail vehicle fireproof coating

Abstract

The invention belongs to the technical field of fireproof coatings, and discloses a novel rail vehicle fireproof coating which is a double-component coating and is formed by mixing a resin A componentand a curing agent B component, wherein the resin A component comprises 25-50 parts of acrylic acid modified epoxy resin, 15-35 parts of a flame retardant, 2-15 parts of a reinforcing agent and 0.1-2parts of a thickening aid; the curing agent B component comprises 5-20 parts of a modified amine curing agent, 2-15 parts of a foaming agent, 0-2 parts of glass fibers, 0-2 parts of carbon fibers and0-2 parts of ceramic fibers; in conclusion, the double-component fireproof coating disclosed by the invention has the advantages that the solid content is 100%, and any solvent and curing acceleratorare not required to be added, so that the double-component fireproof coating has good environmental protection property; meanwhile, the coating is low in mixing viscosity and has the advantage of being easy to construct; besides, the curing agent in the coating adopts a modified amine curing agent, so that the curing agent does not contain volatile micromolecular amine and tertiary amine catalysts, and the problem of strong odor of the curing agent is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of fireproof coatings, in particular to novel fireproof coatings for rail vehicles. Background technique [0002] There are two types of fire retardant coatings: intumescent and non-expandable: the intumescent fire retardant coating itself is relatively thin, but it can quickly expand into a certain thickness of coke layer in the flame. The carbon layer is non-combustible and has extremely low thermal conductivity. It can effectively isolate the flame and heat from spreading to the protected structure; and the intumescent fire retardant coating can be divided into epoxy-based and acrylic-based. Non-intumescent fire retardant coatings are usually cement-based, relying on their high thickness and non-combustibility to provide protection in flames. [0003] The load-bearing structure of the rail vehicle body is mostly aluminum alloy. When the rail vehicle encounters a fire, the aluminum alloy carriage will hea...

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Problems solved by technology

[0006] 1. Non-intumescent fireproof coatings are basically inorganic substances, and the coating needs to have a certain thickness to play a role in heat insulation and fire prevention, which will increase the weight of the overall rail vehicle;

[0007] 2. Most of the epoxy-based intumescent fireproof coatings are inorganic solvents. The existing problems are: a) the viscosity is high and it is not suitable for construction, so it is necessary to add corresponding solvents, and most of the solvents contain VOC, which is not environmentally friendly; b) the Fire-resistant coatings need to be dried and cured based on the curing agent, and the curing agent has a strong smell, which is likely to cause skin allergies; c) the fire resistance and toughness are poor, and it is difficult to meet the application requirements of rail vehicles;

[0008] 3. Most of the acrylic-based intumescent fire-resistant coatings are single-component coatings, and both water-based coatings and solvent-based coatings contain VOC, which is not environmentally friendly; in addition, this type of fire-resistant coating is achieved by volatilization of solvents or water. The layer is dry, and the resin in it is a thermoplastic resin, which has not been re-crosslinked during the drying process, so the dried coating is more sensitive to moisture and has no durability

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