发明授权
- 专利标题： Aromatic polyamide films for transparent flexible substrates
- 专利标题（中）： 用于透明柔性基材的芳香族聚酰胺薄膜
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申请号： US13172564申请日： 2011-06-29
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公开(公告)号： US09457496B2公开(公告)日： 2016-10-04
- 发明人: Limin Sun , Frank W. Harris , Jiaokai Jing , Haci B. Erdem , John D. Harvey , Dong Zhang
- 申请人： Limin Sun , Frank W. Harris , Jiaokai Jing , Haci B. Erdem , John D. Harvey , Dong Zhang
- 申请人地址： US OH Akron
- 专利权人： Akron Polymer Systems, Inc.
- 当前专利权人： Akron Polymer Systems, Inc.
- 当前专利权人地址： US OH Akron
- 代理机构： Benesch, Friedlander, Coplan & Aronoff, LLP
- 主分类号： C08G69/32
- IPC分类号： C08G69/32 ; B32B27/34 ; B29C41/24 ; C08J5/18 ; C09D177/10 ; B29K77/00
摘要：
The present invention is directed toward transparent films prepared from soluble aromatic copolyamides with glass transition temperatures greater than 300 C. The copolyamides, which contain pendant carboxylic groups are solution cast into films using N,N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidinone (NMP), or other polar solvents. The films are thermally cured at temperatures near the copolymer glass transition temperature. After curing, the polymer films display transmittances >80% from 400 to 750 nm, have coefficients of thermal expansion of less than 20 ppm, and are solvent resistant. The films are useful as flexible substrates for microelectronic devices.
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