Reaction type flame retardant for soft polyurethane foam and application

Abstract

The invention discloses a reaction type flame retardant for soft polyurethane foam and an application, belonging to the technical field of the flame retardants. The reaction type flame retardant contains three components, namely a phosphorus-containing polyhydroxy compound, a halogen-containing polylol and a chain extender with two degrees of functionality. When the flame retardant is in use, the reaction type flame retardant can be directly added into polyether polylol and is good in compatibility with the polyether polylol, and the precipitation can be avoided. The polyurethane foam prepared by the reaction type flame retardant is lasting in flame retarding effect and further has the characteristics of low VOC (volatile organic compounds) and low atomization, the flame retarding effect can not be reduced after aging, and adverse impacts on physical properties of the foam can be avoided. The soft foam using the flame retardant has excellent flame laminating performance and great peeling strength, and is suitable for being used as an interior trimming material for automobiles and airplanes.

Description

technical field [0001] The invention relates to a reactive flame retardant and its application in flexible polyurethane foam plastics, belonging to the technical field of flame retardants. Background technique [0002] Flexible polyurethane foam has excellent properties such as light weight, softness, insulation, and breathability, and is widely used in many industries such as aircraft, automobiles, ships, and furniture. However, the polyurethane foam base material has the defects of being extremely easy to catch fire, dripping, spreading rapidly, and being extremely difficult to extinguish. The most commonly used method to solve this problem is to add flame retardants in the polyurethane foaming process. There are many documents related to flame retardants and improving the physical properties of polyurethane foams. For example, U.S. Patent USP6855741 discloses a kind of improved flexible polyurethane foam plastics, and its flame retardant adopts alkyl benzyl phthalate and...

AI Technical Summary

Problems solved by technology

[0003] This technology of using additive flame retardant has the following disadvantages: ①. During the use of polyurethane foam, the flame retardant may migrate, resulting in a reduction in the flame retardant effect; the migrated small molecule flame retardant will make The fog value and VOC of the soft foam are unqualified, and these characteristics are especially required for applications in automobiles

② Added flame retardants have a greater impact on the mechanical properties and performance of polyurethane foam, mainly in the decline in tensile and rebound properties to a large extent

Although the use of plasticizers can temporarily improve the performance of foams, plasticizers are toxic and have been gradually restricted in use

And the plasticizer is easy to move out, which will cause the fog value and VOC of the foam to be unqualified

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