Production method of phenolic foam without formaldehyde release

Abstract

The invention relates to a production method of phenolic foam without formaldehyde release, which adopts the following raw materials and the steps of: (1) preparing for phenol, industrial paraformaldehyde, sodium hydroxide, hydrogen peroxide, methyl acetoacetate and water; (2) adding the phenol, the sodium hydroxide and the water into a reaction kettle, heating up and adding the industrial paraformaldehyde; (3) performing vacuum dehydration; (4) adding the hydrogen peroxide and the methyl acetoacetate, and stirring; (5) taking thermosetting phenolic resin obtained in the step (4), H-330 organic silicon and petroleum ether and stirring; and (6) adding p-toluenesulfonic acid, phosphoric acid and the water, stirring and foaming to obtain the phenolic foam. According to the production method disclosed by the invention, acid is not required to be added for regulating PH value, so that operation process is simplified and economic benefits are significant. Furthermore, compared with the traditional phenolic foam, the phenolic foam has the advantages of obviously reducing the content of free formaldehyde, and avoiding the formaldehyde release during the use, and can be widely applied to the fields including air pipes of central air conditioners, heat insulation of interior walls, heat insulation of clean rooms and other places with high requirements on environmental protection.

Description

technical field [0001] The invention belongs to the technical field of macromolecular organic compounds, and relates to a production method of a phenolic foam material. Background technique [0002] Phenolic foam is a new generation of thermal insulation, fireproof and sound insulation materials. Compared with polystyrene, polyurethane, foamed rubber and plastic and other materials, its biggest feature is that it is an insoluble and infusible polymer with a cross-linked structure, which has flame retardancy and thermal conductivity. Low weight, light weight, heat insulation, heat resistance, excellent electrical insulation performance, excellent mechanical properties, excellent dimensional stability and other characteristics, no burning, no melting, no shrinkage, no poisonous gas, no dense smoke, no dripping at a high temperature of 200 ° C , has strong environmental protection and energy-saving effects, and its comprehensive performance is superior to various traditional ai...

AI Technical Summary

Problems solved by technology

However, phenolic foam contains free formaldehyde, which will cause great harm to the human body when released, stimulate the skin and mucous membranes, and induce dermatitis and pigmentation.