A non-curing rubber asphalt waterproof coating that can be applied at room temperature to prevent flames and suppress smoke

Abstract

The invention provides a non-curing rubber asphalt waterproof coating capable of flame retardancy and smoke suppression that can be applied at normal temperature. The raw materials include asphalt, softening oil, activator, waste rubber powder, modifier, liquid flame retardant and synergist. The preparation process is as follows: Mix and stir the mixed asphalt and softened oil evenly, heat up and dehydrate, add an activator, stir and develop fully, add waste rubber powder, after the development is complete, continue to add modifiers to dissolve, add liquid flame retardants to reduce viscosity And flame retardant synergist, discharge after cooling down. The present invention adopts the sol method, uses the liquid flame retardant as the liquid filler to reduce the viscosity and soften the rubber modifier, and also acts as the main flame retardant to achieve the flame retardant effect. The asphalt is also modified in multiple steps. Through the desulfurization of the activator, the S-S bond / S-C bond of the network macromolecular segment in the waste rubber powder is oxidized and broken, and a large number of small molecular segments are produced. The suspension is dispersed in asphalt and forms a stable semi-solid continuous phase system through a gel film. This process can reduce the shear rate and energy consumption in the production process, so as to realize normal temperature construction, flame retardancy and smoke suppression, effectively reduce construction energy consumption and environmental pollution, and fully recycle and reuse "polymer waste" such as waste rubber powder. Conducive to building a resource-friendly society.

Description

technical field [0001] The invention relates to the technical field of application of building materials, in particular to a non-curing rubber asphalt waterproof coating which can be applied at normal temperature to prevent fire and suppress smoke. Background technique [0002] In recent years, the composite waterproof system of non-curing rubber asphalt waterproof coating and modified bitumen waterproof membrane has been successfully applied in a large number of major projects, and the consumption of non-curing rubber asphalt waterproof coating has shown a blowout growth. Non-curing rubber asphalt waterproof coating can not be cured for a long time within its service life, and always maintains a viscous paste. It has creep properties, strong self-healing ability, and can seal base cracks and capillary pores. The waterproof membrane has excellent compatibility. When the two are used in combination, they can give full play to their respective advantages. The overall closed wa...

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Problems solved by technology

[0003] However, with the popularization and application of non-curing rubber asphalt waterproof coatings, its hidden disadvantages have gradually emerged.

First of all, in the production process of the paint, modifiers such as waste rubber powder are added. In order to fully exert its modification effect on asphalt, it needs to rely on high temperature and long-term shearing, which not only consumes high energy, but also under high temperature for a long time Will release a large amount of asphalt fumes and pollute the environment

Secondly, during the construction process, the temperature of heating and removing the barrel is generally 140-200°C, which may easily cause burns and environmental pollution during construction, and may even cause non-curing in the barrel due to uneven heating, resulting in local degradation and aging, performance attenuation, and affecting the overall waterproofing Effect

[0004] In addition, building fire protection is related to people's property and life safety. Waterproof materials are an important part of building maintenance structures. Therefore, the flame retardancy of waterproof materials must also be considered, and the main materials are asphalt-based waterproof membranes and non-cured rubber. Asphalt waterproof coatings are naturally insufficient in flame retardancy. Once burned, they will not only ignite the surrounding environment, but also release a lot of smoke, which will cause great harm to people and the environment. In order to avoid the above hidden dangers, it is very necessary to provide an effective Non-curing rubber asphalt waterproof coating with flame retardant and smoke suppression effect

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