| 摘要 |
PURPOSE:The titled composition for providing foam useful as a heat insulating material having cell structure with high ratio of closed cell, obtained by blending a liquid phenolic resin of resol type with a specific amount of a specific adduct of phenol with an alkylene oxide as a surface active agent, a blowing agent, etc. CONSTITUTION:In a composition for preparing foam of phenolic resin containing a liquid phenolic resin of resol type, a surface active agent, an acidic curing agent (e.g., phenolsulfonic acid, etc.) and a blowing agent (e.g., trifluorotrichloroethane, etc.), a compound (e.g., adduct of dinonylphenol with 10mol ethylene oxide, etc.) shown by the formula (R1 and R2 are 4-12C alkyl; R3 is H, or methyl; n is 10-50) is used as the surface active agent and the amount used is 0.1-10pts.wt. based on 100pts.wt. phenolic resin.
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