| 摘要 |
PURPOSE:To obtain the subject blowing agent useful for polyurethane, polyisocyanurate, etc., having no danger of destroying an ozone layer, non- combustibility, excellent compatibility, especially excellent heat insulating properties and mechanical strength, comprising a specific fluorine-containing compound. CONSTITUTION:The blowing agent comprising a compound of the formula (X and Y are mutually different and H or F). Polyurethane, polyisocyanurate, PE, PS, PVC, etc., is blended with 2-20% of the blowing agent and foamed. |
