Preparation of expandable graphite filled high dendensity hard polyurethane foamed plastic

Abstract

The invention discloses a method and device to make expandable graphite filling high density hard polyurethane foam plastic. It mixes polyether polyhydric alcohol, triethanolmine, organo-tin, silicone oil, water and expandable graphite at a certain proportion. After whisking by mechanism whisking device to equal, a certain quantity of iso-cyanic ester is added and mixed fully, then pouring into mould, covering the mould cover and taking curing process to gain the production. The invention has good fire resistance property, and the oxygen index would reach 40, the material of vertical burning testing reaches FV-0 grade. The invention conquers the disadvantage of halogenated fire resistance agent, and has crucial meaning for circumstance.

Description

1. Technical Field [0001] The invention belongs to the technical field of new polymer materials, and is a method for using expandable graphite (EG) to fill high-density rigid polyurethane foam to produce flame-retardant packaging and structural foam. 2. Background technology [0002] Rigid polyurethane foam (RPUF) is a foam material made of polyhydric hydroxyl compounds and isocyanates as main raw materials, through addition polymerization and foaming under the action of catalysts and blowing agents. Rigid polyurethane foam has excellent physical and mechanical properties, electrical properties, acoustic properties and chemical corrosion resistance. It has low thermal conductivity, low density, high strength, low water absorption, heat insulation, insulation, sound insulation, good chemical stability, and high recovery rate after impact, so it is widely used in petroleum, chemical, transportation, construction, daily life And other fields of the national economy. However, rigid p...

AI Technical Summary

Problems solved by technology

For rigid polyurethane foam, especially high-density rigid ester polyurethane foam (de

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