发明名称 |
Adhesive tape for electronic parts and liquid adhesive |
摘要 |
The present invention provide a novel polyimide which is soluble in organic solvents and excels in heat resistance, and to a process for producing the polyimide. The polyimide of the present invention comprises a repeating unit represented by the formula (1) and having a number average molecular weight of from 4,000 to 200,000. <IMAGE> (1) wherein X is -SO2- or -C(=O)-OCH2CH2O-C(=O)-, and R1, R2, R3and R4 are independently an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms. |
申请公布号 |
US5851616(A) |
申请公布日期 |
1998.12.22 |
申请号 |
US19960642371 |
申请日期 |
1996.05.03 |
申请人 |
TOMOEGAWA PAPER CO., LTD. |
发明人 |
OKA, OSAMU;NISHIGAYA, TAKESHI;YAMANASHI, FUMIYOSHI |
分类号 |
B32B7/12;C08G73/10;C08L79/08;C09J7/02;C09J179/08;H01L21/52;H01L21/58;H01L23/495;(IPC1-7):C09J7/02 |
主分类号 |
B32B7/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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