FOAMED HARD POLYURETHANE FOAM BASED ON PHENOLIC RESIN WITHOUT USING ACID HARDENER AND METHOD FOR PRODUCING IT

摘要

The present invention relates to a phenolic resin-based rigid polyurethane foam in which a known phenolic foam has the problem of being thermally stable at a high temperature but easily breaking due to low strength and having inferior thermal insulation and in which a known rigid polyurethane foam has the problem of having remarkable thermal insulation and strength but rapidly degrading at 200°C or higher, and thus the shortcomings of the two materials complement each other by synthesizing a phenolic resin-based polyurethane foam, and the corrosion of metals is not caused by not using acid curing agents differently from previously reported research.