A surfactant for phenolic foam and a process for producing phenolic foam

摘要

A surfactant for phenolic foam comprises a castor oil-ethylene oxide adduct wherein the ethylene oxide has more than 20 moles but less than 40 moles added to 1 mole of castor oil. The thermal insulation performance of the phenolic foam is good and does not vary greatly. The phenolic foam has high thermal insulation performance and a low moisture permeability coefficient.