Efficient flame-retardant polyurethane rigid foam with reaction and synergistic effect and preparing method

Abstract

The invention discloses efficient flame-retardant polyurethane rigid foam with a reaction and synergistic effect and a preparing method. The efficient flame-retardant polyurethane rigid foam is prepared from 20 parts of polyether polyol, 20 parts of polymethylene polyphenyl isocyanate, 5 parts of aluminum diethyl phosphinic acid, 7.5 parts of sodium alginate, 5 parts of expansible graphite, 1 partof dimethylamino ethoxyethanol and 2 parts of a modified polymerization silicon surfactant. The preparing method for the efficient flame-retardant polyurethane rigid foam includes the steps that theraw materials are fully mixed, and the mixture is put into a box of 15 cm*15 cm*15 cm under conditions of the room temperature (20 DEG C to 25 DEG C) and normal pressure, is rapidly stirred and foamedthrough an electric stirrer, is placed into a drying box of 80 DEG C and dried for 30 min after foaming is stable, and is subjected to standing for 24 hours at the room temperature, and the polyurethane-rigid-foam raw-material finished product is obtained. By means of the efficient flame-retardant polyurethane rigid foam, the flame-retardant performance of the rigid polyurethane foam can be enhanced, and through experiments of a cone calorimeter, the weight loss ratio, LOI index measurement and the like, it is verified that the flame-retardant effect of the polyurethane rigid foam is good.

Description

technical field [0001] The invention belongs to the technical field of fire-fighting materials, and relates to a material preparation method of flame-retardant polyurethane rigid foam under synergistic action. Background technique [0002] As a polymer material, polyurethane rigid foam is widely used in coal mining, construction, furniture, transportation, shoemaking and leather industries due to its good wear resistance, viscosity, heat preservation and mechanical strength. . Polyurethane rigid foam is prone to disadvantages such as flammability, dripping, and large smoke during use. Therefore, many fields are limited in choosing to use polyurethane rigid foam. In the process of underground coal mine mining, the plasticity of polyurethane is often used to seal holes, and its flammability still exists. Therefore, the selection of flame-retardant polyurethane rigid foam has far-reaching significance for the safe production of coal mines. [0003] The flame retardants of rig...

AI Technical Summary

Problems solved by technology

Polyurethane rigid foam is prone to disadvantages such as flammability, dripping, and large smoke during use. Therefore, many fields are restricted when choosing to use polyurethane rigid foam.