Appeal 1997-2572
Application 08/220,562
(A) a tetracarboxylic acid dianhydride containing at
least 10 mole % of 2,2-bis(3,4-
benzenedicarboxylic anhydride)perfluoropropane
[6FDA] and
(B) a mixture of amines made up of:
(1) a siloxane-containing diamine and
(2) an ether diamine.
10. The examiner seems to regard Okinoshima Example
8 as highly pertinent. Example 8 is as follows:
Example 8
The procedure of Example 1 was repeated except that
4.4 grams (0.01 mol) of 2,2-bis(3,4-benzenedicarboxylic
anhydride)perfluoropropane [6FDA ] and 26.5 grams (0.092
mol) of 3,3',4,4'-biphenyltetracarboxylic dianhydride
[BPDA ] were used as the tetracarboxylic dianhydride3
component and 1.2 grams (0.005 mol) of bis(3-
aminopropyl)tetramethyl-disiloxane and 39.0 grams (0.095
mol) of 2,2-bis[4-(4-aminophenoxy)-phenyl]propane [BAPP ]4
were used as the diamine component. There was obtained
68.0 grams of a polyimide resin.
A dianhydride which does not fall within the scope of clause (II)(A) of2
applicants' claim 1.
A dianhydride within the scope of clause (II)(A) of applicants' claim 1.3
The amine of clause (II)(B)(2)(a) of applicants' claim 1.4
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