Method for preparing high-flame-retardance polyol

Abstract

The invention provides a method for preparing a high-flame-retardance polyol. The method comprises the steps: carrying out a stirred and mixed reaction on phenol, phthalic anhydride, pentaerythritol, boric acid, zinc acetate and hydroquinone in an enameled reactor for 6 to 10 hours so as to produce compound borate, i.e., a material A; carrying out a mixed reaction on cyanuric acid (dry), diethylene glycol and butyl titanate for 3 to 8 hours so as to produce cyanurate, i.e., a material B; mixing solid formaldehyde and liquid formaldehyde so as to prepare a material C, adding the material B, the material C, the material A, triethanolamine, polyethylene polyamine, barium hydroxide and melamine into a stainless-steel reactor, and carrying out a mixed reaction for 3 to 10 hours, so as to produce a material D; vacuumizing a reactor until the internal pressure of the reactor is -0.09MPa, dropwise adding epoxyethane, of which the weight is 0.5% to 1.5% the total weight of the material D, and epoxypropane, of which the weight is 0.5% to 15% the total weight of the material D, into the reactor in a block manner, heating the reactor to the temperature of 90 DEG C to 120 DEG C, and carrying out a reaction for 0.5 to 2 hours, so as to produce a material E; and adding polyphosphazene, of which the weight is 0.1% to 6% the total weight of the material E, into the material E when the temperature of the material E is cooled to 60 DEG C to 100 DEG C, and cooling the mixture to room temperature, thereby producing the high-flame-retardance polyol.

Description

technical field [0001] The invention relates to a method for preparing highly flame-retardant polyols, and belongs to the technical field of polyol preparation methods. Background technique [0002] The fire protection level of building organic thermal insulation materials is not enough, it is easy to cause fire, once a fire occurs, people's lives and properties will be greatly threatened. At the end of the CCTV fire that year, it was finally determined that the fire protection standard of the decoration materials selected for the curtain wall of the north wing building was lower than the national standard B level (equivalent to GB / 8624-2012 level B1), but not up to the standard C level (equivalent to GB / 8624- Level B2 in 2012). The fireproof material of the curtain wall was not up to standard, which was an important factor that caused the CCTV fire and spread rapidly throughout the building in a short period of time, causing huge losses. Most of the grades of existing fla...

AI Technical Summary

Problems solved by technology

The fireproof material of the curtain wall is not up to standard, which is an important factor that caused the CCTV fire and spread rapidly to the whole building in a short period of time, resulting in huge losses