[특허]Expanded graphite and products produced therefrom

[미국특허] Expanded graphite and products produced therefrom 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B60C-001/00 C08F-002/16 C08F-002/22 C08G-069/26 C08G-069/44 C08J-003/00 C08K-003/00 C08K-003/04 C08K-003/26 C08L-077/00 C08L-079/00 D21H-017/55 B27J-005/00 B28B-005/00 B29B-017/00 B29C-033/48 B29C-063/00 B29C-065/00 B29C-069/00 B29C-071/00 C01B-031/00 C01B-031/02 C01B-031/04 C04B-014/00 C04B-016/00 C04B-018/00 C04B-020/06 C04B-035/00 D04H-001/54 H01B-001/04 H01M-004/13 H01M-004/58 H01M-004/62
출원번호	US-0435471 (2006-05-17)
등록번호	US-8501858 (2013-08-06)
발명자 / 주소	Drzal, Lawrence T. Fukushima, Hiroyuki
출원인 / 주소	Board of Trustees of Michigan State University
대리인 / 주소	Marshall, Gerstein & Borun LLP
인용정보	피인용 횟수 : 1 인용 특허 : 93

초록 ▼

Graphite nanoplatelets of expanded graphite and polymer composites produced therefrom are described. The graphite is expanded from an intercalated graphite by microwaves or radiofrequency waves in the presence of a gaseous atmosphere. The composites have barrier and/or conductive properties due to t

대표청구항 ▼

1. A composite composition which comprises in admixture: (a) a polymer; and(b) microwave or radiofrequency wave expanded graphite platelets, which were expanded from a graphite containing an intercalcant by boiling the intercalcant and which are optionally pulverized, in admixture in the polymer, wherein: (i) the platelets are present in an amount which provides electrical conductivity properties or provides barrier properties to gases or liquids or a combination of these properties to the composite composition; and(ii) the platelets in the composite composition have a number size distribution with an average diameter ranging from 15 μm to 200 μm. 2. The composition of claim 1, wherein the expanded graphite platelets are present in the composite composition in an amount which provides electrical conductivity properties to the composition. 3. The composition of claim 1, wherein the expanded graphite platelets are present in the composite composition in an amount which provides barrier properties to gases or liquids or both to the composition. 4. The composition of claim 1, wherein the polymer comprises nylon. 5. The composition of claim 1, wherein the platelets are about 0.5 to 40% by weight of the composition. 6. A composite composition which comprises in admixture: (a) a polymer; and(b) microwave or radiofrequency wave expanded graphite platelets, which were expanded from a graphite containing an intercalcant by boiling the intercalcant and are which optionally pulverized, in admixture in the polymer, wherein: (i) the platelets are present in an amount which provides electrical conductivity properties or provides barrier properties to gases or liquids or a combination of these properties to the composite composition; and(ii) the platelets in the composite composition have a number size distribution with an average diameter up to 1 μm. 7. The composition of claim 6, wherein the expanded graphite platelets are present in the composite composition in an amount which provides electrical conductivity properties to the composition. 8. The composition of claim 6, wherein the expanded graphite platelets are present in the composite composition in an amount which provides barrier properties to gases or liquids or both to the composition. 9. The composition of claim 6, wherein the polymer comprises nylon. 10. The composition of claim 6, wherein the platelets are about 0.5 to 40% by weight of the composition.

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[미국특허] Expanded graphite and products produced therefrom 원문보기

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