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US 7,838,108 B2Granted
Nano-cellular polymer foam and methods for making them
AssigneeSabic Innovative Plastics IP B.V.
InventorsChinniah Thiagarajan, Ravi Sriraman, Tansen Dhananjay Chaudhari, Muniratnam Kumar, Vlkash Kumar Sinha, Asim Pattanayak
Life of this patent
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Abstract
A nano-cellular polymer foam is disclosed, which has an average pore size from about 10 nanometers to about 500 nanometers; and a foam density that is from about 1 percent to about 50 percent of the bulk density of the material of the nano-cellular foam.
Claims40
A nano-cellular polymer foam having:
- an average pore size from about 10 nanometers to about 200 nanometers;
- a cell density of greater than about 1012 cells per cubic centimeter;
- and
- a foam density that is from about 1 percent to about 50 percent of the bulk density of a material comprising the nano-cellular foam;
- and
- wherein the nano-cellular polymer foam comprises a thermal conductivity of about 0.001 to about 0.01 Watts per meter-Kelvin over a temperature range of about ambient temperature to about 350° C.
3 more elements
A nano-cellular polymer foam having:
- an average pore size from about 10 nanometers to about 200 nanometers;
- a cell density of greater than about 1012 cells per cubic centimeter and a relative density that is from about 5 percent to about 50 percent of the bulk density of a material comprising the nano-cellular polymer foam;
- wherein the foam is made of a thermoplastic polymer, an amorphous polymer, or a semicrystalline polymer;
- and
- wherein the nano-cellular polymer foam comprises a thermal conductivity of about 0.001 to about 0.01 Watts per meter-Kelvin over a temperature range of about ambient temperature to about 350° C.
2 more elements
A nano-cellular polymer foam having:
- an average pore size from about 10 nanometers to about 200 nanometers;
- a cell density of greater than about 1012 cells per cubic centimeter;
- and
- a foam density that is from about 1 percent to about 50 percent of the bulk density of a material comprising the nano-cellular foam;
- and
- wherein the nano-cellular polymer foam comprises a gas conduction of less than or equal to 2×10−2 Watts per meter-Kelvin.
3 more elements
A method for producing a nano-cellular polymer foam, comprising:
- contacting a polymer with a foaming agent to form a homogeneous phase material, the polymer having an average particle size from about 10 nanometers to about 10 millimeters;
- and
- processing the homogeneous phase material to produce the nano-cellular polymer foam having an average pore size of about 10 nanometers to about 200 nanometers, a cell density of greater than about 1012 cells per cubic centimeter, and a foam density of about 1 percent to about 50 percent of the bulk density of a material comprising the nano-cellular foam;
- and
- wherein the nano-cellular polymer foam comprises a thermal conductivity of about 0.001 to about 0.01 Watts per meter-Kelvin over a temperature range of about ambient temperature to about 350° C.
2 more elements
Dependencies are inferred from the claim text.