Thermoplastic foams made with methyl formate-based blowing...

Details Thermoplastic foams made with methyl formate-based blowing... Thermoplastic foams made with methyl formate-based blowing...

2007-12-11

2007-12-11

Zemel, Irina S (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S097000, C521S098000, C521S142000, C521S146000

Reexamination Certificate

active

10934832

ABSTRACT:
A blowing agent blend for making thermoplastic polymer foams comprises methyl formate. The blowing agent blend can further comprise at least one co-blowing agent. The co-blowing agent is either a physical co-blowing agent (e.g. an inorganic agent, a hydrocarbon, a halogenated hydrocarbon, a hydrocarbon with polar, functional group(s), water or any combination thereof), or a chemical co-blowing agent, or combinations thereof. The thermoplastic polymer foam can be an alkenyl aromatic polymer foam, e.g. a polystyrene foam. The blowing agent blend can comprise 100 mol % methyl formate, or it can comprise any combination of methyl formate and one or more co-blowing agents. The methyl formate-based blowing agent blends produce stable foams. A process for the preparation of such foams is also provided.

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Cellular Materials, Encyclopedia of Polymer Science and Technology, J. Wiley and Sons, Article online, copyright 1999-2005.

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