A preparation method of molecular chain soft segment flame-retardant polyurethane foam

Abstract

The invention provides a preparation method of a molecular chain soft segment flame-retardant polyurethane foam. The molecular chain soft segment flame-retardant polyurethane foam is prepared from the following components by weight: 80 to 110 parts of polyol, 3 to 10 parts 10 parts of chain extender, 1~5 parts of blowing agent, 1~6 parts of amine catalyst, 0.1~1 part of gel catalyst, 2~8 parts of surfactant, 10~80 parts of reactive liquid molecule HEP, 60~ 130 parts isocyanate. The soft-segment flame-retardant polyurethane foam prepared by the invention has excellent and long-lasting flame-retardant performance, good flexibility, and can be used to prepare soft flame-retardant materials, especially for the preparation of home furnishing, product packaging, medical and health care, and automobiles. , rail transit, aircraft and other vehicles, such as soft interior flame retardant materials, have a good application prospect.

Description

technical field [0001] The invention belongs to the field of flame-retardant materials, and in particular relates to a method for preparing flame-retardant polyurethane foam with a soft molecular chain segment. Background technique [0002] Polyurethane foam has the advantages of light weight, low thermal conductivity, and good dimensional stability for cushioning and shock absorption. Widely used in automotive interiors, home furnishing, product packaging and medical and health industries. However, while polyurethane foam brings safety to people, there are also some hidden dangers. Mainly because of its flammable characteristics, it poses a threat to people's life and safety. [0003] The molecular chain segments in polyurethane foam contain a large amount of carbon and hydrogen elements, which are prone to combustion. At the same time, its low-density and high-porosity structure will greatly accelerate heat loss and combustion speed. In addition, polyurethane foam will...

AI Technical Summary

Problems solved by technology

However, although the addition of flame retardants can give polyurethane foams long-lasting and excellent flame retardancy, it will also bring new problems to polyurethane foams. For example, expandable graphite as flame retardants can improve the flame retardancy of polyurethane foams. performance, but its compatibility with the matrix is ​​poor, and the addition of it will lead to deterioration of the mechanical properties of polyurethane foam, and the migration and shedding of flame retardants will occur, which will have a great negative effect on the application of polyurethane foam; in addition, traditional addition The introduction of flame retardants will increase the compressive strength of polyurethane foam, increase the brittleness of polyurethane foam, and limit its application in household, product packaging, medical and health care, etc.

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