PHENOLIC RESIN FOAM

摘要

A phenolic resin foam which is obtained by using a hydrocarbon as a foaming agent having no fear of ozonosphere depletion and a low coefficient of global warming, has excellent heat-insulating performance, and is excellent in mechanical strengths such as compression strength and reduced in brittleness. This foam has a closed-cell content of 70 % or higher, an average cell diameter of 10 to 400 mu m, and a density of 10 to 70 kg/m<3> and gives through pyrolytic gas chromatography a pyrolysis pattern in which the ratio C of the area A for all trimethylphenols as pyrolysis products to the area B for phenol as another pyrolysis product (C=A/B) is in the range defined by equation (1): 0.05