Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1995-06-06
1998-05-26
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528271, 528272, 528274, 528282, 528289, 528292, 528293, 528295, 528298, 528299, 528300, 524175, C08G 6382
Patent
active
057566453
ABSTRACT:
The yield of fully substituted, multidimensional aromatic hubs in the condensation of hydroxyl and acid halide functionalities is improved by adding a thallium catalyst, such as thallium ethoxide (Tl-OC.sub.2 H.sub.5), in the solvent.
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Lubowitz Hyman R.
Sheppard Clyde H.
Stephenson Ronald R.
Acquah Samuel A.
Hammar John C.
The Boeing Company
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