Grease-proof, heat-resistant expansion type flame-proof rubber

Abstract

This invention discloses an expansion fire-retardant rubber with resistance to oil and heat, particularly being applicable to fire safety protection of conductor bundles in all enclosed spaces, and relates to the technical field of the fire-retardant rubber which is composed by the components with the following portions by weight: 40 to 60 percent of oil-resistant rubber, 5 to 10 percent of resin viscosity regulator, 20 to 40 percent of ammonium polyphosphate, 3 to 10 percent of melamine, 2 to 8 percent of zinc borate, 5 to 20 percent of nano-inorganic and 1 to 5 percent of silica white. The fuel immersion swelling rate of the fire-retardant rubber is zero; when the rubber thickness is less than or equal to 1.0mm, the fire resistance duration is more than or equal to 5 min with the flame temperature of 1200 DEG C and the protected substrate temperature of being less than or equal to 300 DEG C. The fire-retardant rubber of the invention has resistance to heat and ageing, and flexibility and can be used for the fire safety protection of various the conductor bundles.

Description

technical field [0001] The invention relates to the technical field of flame-retardant rubber, and the expandable flame-retardant rubber is especially suitable for fire safety protection of wire bundles in various enclosed spaces. Background technique [0002] At present, there are two main types of halogen-free flame retardants for general-purpose rubber: (1) systems based on the addition of inorganic metal hydroxide flame retardants, such as aluminum hydroxide and magnesium hydroxide, compounded with a small amount of zinc borate, Red phosphorus, organic phosphate, organic silicon, etc.; (2) adding intumescent flame retardants, typical intumescent flame retardant systems are ammonium polyphosphate (acid source), pentaerythritol (carbon source), melamine (gas source), which can Compound a certain amount of titanium dioxide, silicon dioxide, talcum powder, nano-montmorillonite, etc. to improve the effect of expansion, flame retardancy and heat insulation. Because the intume...

AI Technical Summary

Problems solved by technology

The reason is that there is a technical problem in the preparation of oil-resistant, heat-resistant, soft high-temperature flame-resistant intumescent flame-retardant rubber, that is, the rapid cross-linking of the oil-resistant rubber system in the early stage of thermal decomposition makes it difficult for the gas source to play an expansion role, and the non-expandable flame-retardant Rubber does not have good high temperature flame resistance

At the same time, the presence of carbon source pentaerythritol in the current intumescent flame retardant system will lose the heat resistance and humidity resistance of intumescent flame retardant rubber.

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