Flame retardant polyurethane rigid foamed plastic prepared based on microencapsulated fly ash

Abstract

The invention provides flame retardant polyurethane rigid foamed plastic prepared based on microencapsulated fly ash. The flame retardant polyurethane rigid foamed plastic is prepared from a componentA and a component B, the component A is prepared from the following raw material components in parts by weight: 60-80 parts of polyether polyol, 0.5-3 parts of a catalyst, 0.5-1.5 parts of a foam stabilizer, 0.6-1 part of deionized water, 6-30 parts of MFA and 0.06-0.1 part of triethylene diamine, and the component B is prepared from 60-100 parts of polymethylene polyphenyl polyisocyanate in parts by weight. The flame retardant polyurethane rigid foamed plastic prepared based on the microencapsulated fly ash has good heat resistance, high compressive strength, high limit oxygen index and goodflame retardant properties.

Description

technical field [0001] The invention relates to the field of polyurethane modification, in particular to a flame-retardant polyurethane rigid foam prepared based on microencapsulated fly ash. Background technique [0002] Polyurethane foam (RPUF) is a new type of polymer composite material with excellent mechanical properties, acoustic properties, electrical properties and chemical properties. But polyurethane hard foam limit oxygen index has only 17 under normal temperature, is easy to burn, can not satisfy the use requirement, it is imperative to find a kind of method of high-efficiency environment-friendly flame-retardant polyurethane hard foam. Generally, there are two ways to improve flame retardancy: physical addition and chemical synthesis. The two methods have their own advantages and disadvantages. Physically added flame retardants are easy to operate and are suitable for large-scale production and utilization, but the particle size of flame retardants will affect ...

AI Technical Summary

Problems solved by technology

The two methods have their own advantages and disadvantages. Physically added flame retardants are easy to operate and are suitable for large-scale production and utilization, but the particle size of flame retardants will affect the polyurethane foaming process and its mechanical properties; chemically reactive flame retardants The effect is good and the effect on the cells is small, but the preparation process is complicated and produces a large number of toxic by-products

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