| 摘要 |
A blowing agent blend for making thermoplastic polymer foams includes met hyl formate. The blowing agent blend can further comprise at least one co- b lowing agent. The co-blowing agent is either a physical co-blowing agent (e. g. an inorganic agent, a hydrocarbon, a halogenated hydrocarbon, a hydrocarb on with polar, functional group(s), water or any combination thereof), or a chemical co-blowing agent, or combinations thereof. The thermoplastic polyme r foam can be an alkenyl aromatic polymer foam, e.g. a polystyrene foam. The blowing agent blend includes methyl formate and one or more co-blowing agen ts. The methyl formate-based blowing agent blends produce dimensionally stab le foams that have improved resistance to flame spread. A process for the pr eparation of such foams is also provided. |
