Foamable polyester compositions having a low level of unreacted

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

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264 50, 264 54, 521 79, 521138, C08J 908, C08J 910

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active

056961766

ABSTRACT:
This invention relates to a process for preparing foamable branched polyester compositions having increased melt viscosity and melt strength, and a reduced level of unreacted monomeric branching agent. The process involves melt blending (A) a composition containing a polyolefin and branching agent, (B) a nucleating agent either in powder form or (B') in the form of a composition containing a polyolefin and nucleating agent, and a polyester.

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