Nano-cellular polymer foam and methods for making them
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-032/06
C08J-009/18
출원번호
UP-0623910
(2007-01-17)
등록번호
US-7838108
(2011-01-22)
발명자
/ 주소
Thiagarajan, Chinniah
Sriraman, Ravi
Chaudhari, Tansen Dhananjay
Kumar, Muniratnam
Sinha, Vlkash Kumar
Pattanayak, Asim
출원인 / 주소
Sabic Innovative Plastics IP B.V.
대리인 / 주소
Cantor Colburn LLP
인용정보
피인용 횟수 :
3인용 특허 :
9
초록
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.
대표청구항▼
The invention claimed is: 1. 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
The invention claimed is: 1. 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. 2. The nano-cellular polymer foam of claim 1, comprising an open cell structure, a closed cell structure, or combinations thereof. 3. The nano-cellular polymer foam of claim 1, having an average pore size standard deviation that is less than or equal to about 10 percent of the average pore size. 4. The nano-cellular polymer foam of claim 1, having a cell density of from about 1012 to about 1018 cells per cubic centimeter. 5. The nano-cellular polymer foam of claim 1, having a cell density of from about 1015 to about 1018 cells per cubic centimeter. 6. The nano-cellular polymer foam of claim 1, having a foam density that is 5-25 percent of the bulk density of the material of the nano-cellular polymer foam. 7. The nano-cellular polymer foam of claim 1, having a foam density that is 1-10 percent of the bulk density of the material of the nano-cellular polymer foam. 8. The nano-cellular polymer foam of claim 1, comprising a super-structural foam. 9. The nano-cellular polymer foam of claim 8, further comprising a super-insulating foam. 10. The nano-cellular polymer foam of claim 8, which is transparent to electromagnetic radiation. 11. The nano-cellular polymer foam of claim 1, comprising an energy absorbing material, a packaging material, a thermal insulation material, an acoustic insulation material, a building construction material, or a building glazing material. 12. The nano-cellular polymer foam of claim 1, comprising a super-insulating foam. 13. The nano-cellular polymer foam of claim 1, comprising a conductive packaging material, a fuel tank coating, an aircraft fuel tank coating, an automotive fuel tank coating, an aircraft fuselage insulating material, a display device diffuser, a membrane, a sensing device, a floating structure, a gas mixer, a gas diffuser, a liquid-gas separator, a compact heat exchanger, an orthopaedic device, or a weatherable exterior panel. 14. The nano-cellular polymer foam of claim 1, wherein the average pore size comprises a defect insensitive pore size. 15. An article comprising the foam of claim 1. 16. The article of claim 15, that is a nano-cellular foamed polymer extrudate. 17. The article of claim 15, wherein the nano-cellular foamed polymer extrudate comprises a sheet. 18. The article of claim 17, wherein the sheet comprises an integrated sandwich panel, a co-laminated panel, a co-extruded panel comprising an inner foam sheet, graded foam sheets, co-extruded foam sheets, corrugated foam sheets, multi-wall foam sheets, an integral sheet structure comprising a foam sheet and a reinforced skin as a top layer, and a multi-wall sheet structure comprising at least one foam sheet disposed between two or more plastic sheets. 19. 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. 20. The nano-cellular polymer foam of claim 19, having a cell density of from about 1012 to about 1018 cells per cubic centimeter. 21. 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. 22. The nano-cellular polymer foam of claim 21, having an average pore size standard deviation that is less than or equal to about 10 percent of the average pore size. 23. The nano-cellular polymer foam of claim 21, having a cell density of from about 1012 to about 1018 cells per cubic centimeter. 24. The nano-cellular polymer foam of claim 21, having a foam density that is 5-25 percent of the bulk density of the material of the nano-cellular polymer foam. 25. 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. 26. The method of claim 25, comprising an extrusion technique for producing the nano-cellular polymer foam. 27. The method of claim 26, wherein said contacting and extrusion comprises a residence time that is from about 0.5 to about 0.9 times the time taken for diffusion of foaming agent out of the particles of the polymer. 28. The method of claim 26, wherein the extrusion technique is implemented continuously. 29. The method of claim 25, wherein the polymer comprises a thermoplastic polymer, an amorphous polymer, a thermoset polymer, or a semi-crystalline polymer. 30. The method of claim 29, wherein the thermoplastic polymer is selected from the group consisting of polyacetals, polyacrylics, polycarbonates polystyrenes, polyesters, polyamides, polyamideimides, polyarylates, polyarylsulfones, polyethersulfones, polyphenylene sulfides, polysulfones, polyimides, polyetherimides, polytetrafluoroethylenes, polytherketones, polyether etherketones, polyether ketone ketones, polybenzoxazoles, polyoxadiazoles, polybenzothiazinophenothiazines, polybenzothiazoles, polypyrazinoquinoxalines, polypyromellitimides, polyquinoxalines, polybenzimidazoles, polyoxindoles, polyoxoisoindolines, polydioxoisoindolines, polytriazines, polypyridazines, polypiperazines, polypyridines, polypiperidines, polytriazoles, polypyrazoles, polypyrrolidines, polycarboranes, polyoxabicyclononanes, polydibenzofurans, polyphthalides, polyacetals, polyanhydrides, polyvinyl ethers, polyvinyl thioethers, polyvinyl alcohols, polyvinyl ketones, polyvinyl halides, polyvinyl nitriles, polyvinyl esters, polysulfonates, polysulfides, polythioesters, polysulfones, polysulfonamides, polyureas, and polyphosphazenes. 31. The method of claim 29, wherein the semi-crystalline polymer is selected from the group consisting of polyphenylene sulfides, polyetheretherketones, polyetherketones, phthalamides, polyetherketoneketones, polybutylene terephthalates, and high temperature nylons. 32. The method of claim 29, wherein the thermoplastic polymer comprises a polyetherimide or a polycarbonate. 33. The method of claim 25, wherein said contacting the polymer with the foaming agent is carried out at a temperature from about −100° C. to about 20° C. 34. The method of claim 25, wherein said contacting the polymer with the foaming agent is carried out at a temperature from about −40° C. to about 20° C. 35. The method of claim 25, wherein the foaming agent is a solid, a liquid, a gaseous, or a supercritical foaming agent. 36. The method of claim 25, wherein the foaming agent is selected from the group consisting of carbon dioxide, air, nitrogen, argon, gaseous hydrocarbons, and combinations thereof. 37. The method of claim 36, wherein the foaming agent is selected from the group consisting of solid carbon dioxide, liquid carbon dioxide, gaseous carbon dioxide, and supercritical carbon dioxide. 38. The method of claim 25, wherein said contacting is implemented at a pressure from ambient pressure to about 150 Newtons per meter squared. 39. The method of claim 25, wherein said average particle size is from about 10 nanometers to about 100 microns. 40. The method of claim 25, wherein said average particle size is from about 10 nanometers to about 1 millimeter.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (9)
Pierick, David E.; Anderson, Jere R.; Cha, Sung W.; Chen, Liqin; Stevenson, James F.; Laing, Dana E., Injection molding of polymeric material.
Burnham Theodore A. ; Cha Sung W. ; Walat Robert H. ; Kim Roland Y. ; Anderson Jere R. ; Stevenson James F. ; Suh Nam P. ; Pallaver Matthew, Method and apparatus for microcellular polymer extrusion.
Burnham, Theodore A.; Cha, Sung W.; Walat, Robert H.; Kim, Roland Y.; Anderson, Jere R.; Stevenson, James F.; Suh, Nam P.; Pallaver, Matthew, Method and apparatus for microcellular polymer extrusion.
Joseph M. DeSimone ; Saad A. Khan ; Joseph R. Royer ; Richard J. Spontak ; Teri Anne Walker, Method of making foamed materials using surfactants and carbon dioxide.
Hower R. Thomas (c/o Marion Composites ; 150 Johnston Rd. Marion VA 24354-3121) Hoang Stephen V. (c/o Marion Composites ; 150 Johnston Rd. Marion VA 24354-3121), Polyimide foam-containing radomes.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.