Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1998-11-12
1999-09-28
Nutter, Nathan M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
578321, 578322, 1563309, 1563315, C08G 6908, C08G 7310, C08G 7500, C08G 7902
Patent
active
059590688
ABSTRACT:
This invention provide an adhesive tape and a liquid adhesive for electronic parts having sufficient thermal resistance and reliability. The adhesive tape comprises an adhesive layer composed of at least a polyimide comprising the repeating units represented by the formulas (1) and (2), provided on surface of a heat resistance film or a release film: ##STR1## wherein X is --SO.sub.2 -- and/or --C(.dbd.O)--OCH.sub.2 CH.sub.2 O--C(.dbd.O)--, Ar is a divalent group containing aromatic rings, and R is an alkylene group having 1 to 10 carbon atoms or --CH.sub.2 OC.sub.6 H.sub.4 --, and n means an integer of 1 to 20.
REFERENCES:
patent: 5300627 (1994-04-01), Kunimune et al.
Nishigaya Takeshi
Oka Osamu
Yamanashi Fumiyoshi
Nutter Nathan M.
Tomoegawa Paper Co. Ltd.
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