Binary synergistic flame retardant system and application thereof

Abstract

The invention provides a binary synergistic flame retardant system, which is composed of the following components in parts by weight: 15-80 parts of specially coated polyphosphate and 5-35 parts of layered chain mineral powder. The invention also provides the application of the binary synergistic flame retardant system in the preparation of flame retardant materials. The binary flame retardant system prepared by the invention has excellent synergistic flame retardant effect, and the polyurethane foam composite material prepared by the binary flame retardant system has excellent flame retardanteffect; at the same time, the addition of chain-like mineral powder improves the compressive strength of polyurethane foam composites, and makes them have good physical and mechanical properties. Ithas an important application prospect in cushioning and vibration reduction, packaging, cabin materials of aerospace vehicles, automobiles and indoor soft-loading materials.

Description

technical field [0001] The invention belongs to the field of flame retardant materials, and in particular relates to a binary synergistic flame retardant system and its application. Background technique [0002] Polyurethane foam, especially semi-rigid polyurethane foam (SPF), is widely used in automotive interior parts, bumpers, sound insulation and packaging materials due to its excellent impact resistance, resilience and compression properties. However, the structural characteristics such as high porosity, low density and high proportion of hydrocarbon elements in the main chain of the molecule make it extremely easy to burn, and at the same time release a large amount of toxic gas during the combustion process, which greatly limits the use of semi-rigid polyurethane foam. Therefore, it is of great significance to improve its flame retardant performance. [0003] Halogenated flame retardants have been widely used in polyurethane foam, but they release toxic and possibly ...

AI Technical Summary

Problems solved by technology

However, the structural characteristics such as high porosity, low density and high proportion of hydrocarbon elements in the main chain of the molecule make it extremely easy to burn, and at the same time release a large amount of toxic gas during the combustion process, which greatly limits the use of semi-rigid polyurethane foam. Therefore, it is of great significance to improve its flame retardant performance

[0003] Halogenated flame retardants have been widely used in polyurethane foam, but they will release toxic and possibly carcinogenic brominated furans and dioxins during combustion, and their use has been restricted

[0004] Polyphosphate (AP) is a kind of chemical intumescent flame retardant, which can exert a good flame retardant effect in polyurethane foam only when it is added in a large amount, and the flame retardant efficiency of a single flame retardant is low

At the same time, the high amount of polyphosphate makes the white material used for synthesizing polyurethane very viscous, which will affect the foam forming process, resulting in the mechanical strength, performance and service life of polyurethane foam being affected to varying degrees.

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