Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1988-09-16
1992-05-19
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528 21, 528 23, 528 38, 528125, 528126, 528128, 528170, 528171, 528184, 528185, 528188, 528331, 528352, C08G 6926, C08G 802, C08G 7706, C08G 7500
Patent
active
051150891
ABSTRACT:
Disclosed herein are processes for the preparation of polyimide-isoindroquinazolinediones and precursor thereof. These polymers are useful as heat-resistant electric insulation materials, surface coating films for electronic instrument parts and especially suitable for manufacturing a photoresist. The above precursor is produced by reacting a an alkylenebistrimellitate dianhydride, a diaminoamide compound and the other amine. The precursor is readily dehydrated and ring-closed to produce polyimide-isoindroquinazolinedione, which is often conveniently conducted by producing a varnish of the precursor, applying it onto adequate substrates such as silicon wafers, glass plates, metal plates, etc. and then subjecting the coated film to dehydration. The resulting films have excellent physical properties such as good adherence, high tensile strength, low elasticity, etc.
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Kato Toshihiko
Kojima Mitsumasa
Miyadera Yasuo
Satou Hidetaka
Shibata Katsuji
Hampton-Hightower P.
Hitachi Chemical Co. Ltd.
Kight III John
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