Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1994-05-02
1995-06-27
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524602, 524606, 524607, 528125, 528128, 528172, 528173, 528176, 528183, 528185, 528188, 528220, 528229, 528350, 528353, C08G 7310, C08L 7968
Patent
active
054281024
ABSTRACT:
A series of polyimides based on the dianhydride of 1,4-bis(3,4-dicarboxyphenoxy)benzene (HQDEA) or on 2,2-bis[4(3-aminophenoxy)phenyl]hexafluoropropane (3-BDAF) are evolved from high molecular weight polyamic acid solutions yielding flexible free-standing films and coatings in the fully imidized form which have a dielectric constant in the range of 2.5 to 3.1 at 10 GHz.
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patent: 4595548 (1986-06-01), St. Clair et al.
patent: 4603061 (1986-07-01), St. Clair et al.
patent: 4645824 (1987-02-01), Landis et al.
patent: 4837300 (1989-06-01), St. Clair et al.
patent: 4895972 (1990-01-01), Stoakley et al.
St. Clair Anne K.
St. Clair Terry L.
Winfree William P.
Helfrich George F.
Hightower Pat
Michl Paul R.
The United States of America as represented by the United States
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