Nanocellular thermoplastic foam and process for making the same
Prepare a thermoplastic polymer foam having a porosity of 70% or more and at least one of: (i) an average cell size of 200 nanometers or less; and (ii) a nucleation density of at least 1.times.1015 effective nucleation sites per cubic centimeter of foamable polymer composition not including blowing agent using a foamable polymer composition containing a thermoplastic polymer selected from styrenic polymer and (meth)acrylic polymers, a blowing agent comprising at least 20 mole-percent carbon dioxide based on moles of blowing agent and an additive having a Total Hansen Solubility Parameter that differs from that of carbon dioxide by less than 2 and that is present at a concentration of 0.01 to 1.5 weight parts per hundred weight parts thermoplastic polymer.
- Research Organization:
- Dow Global Technologies LLC, Midland, MI (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EE0003916
- Assignee:
- Dow Global Technologies LLC (Midland, MI)
- Patent Number(s):
- 9,145,477
- Application Number:
- 14/421,851
- OSTI ID:
- 1221982
- Resource Relation:
- Patent File Date: 2013 Sep 13
- Country of Publication:
- United States
- Language:
- English
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