Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1989-11-07
1992-12-29
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528125, 528126, 528128, 528170, 528172, 528174, 528175, 528185, 528186, 528188, 528220, 528226, 528229, 528322, 528342, 528345, 528348, 528350, 528351, 528352, 528353, 525422, 525426, C08G 7310, C08G 6926, C08G 802
Patent
active
051752344
ABSTRACT:
Polyimide oligomers include (1) linear, monofunctional crosslinking oligomers prepared by condensing a monoanhydride end cap with a diamine that includes alternating ether and "Sulfone" (--SO.sub.2 --, --S--, --CO--, --(CF.sub.3).sub.2 C--, or --(CH.sub.3).sub.2 C--) linkages connecting alternating aromatic radicals and with a dianhydride (or dianhydride mixture), particularly the unsaturated, aliphatic dianhydride commonly known as MCTC; (2) linear, mono- or difunctional crosslinking oligomers prepared by condensing an amine end cap with a diamine and a dianhydride; and (3) multidimensional, crosslinking oligomers having an aromatic hub and at least three radiating arms connected to the hub, each arm including a crosslinking end cap at its distal end and at least one imide linkage.
Blends, prepregs, and composites can be prepared from the oligomers.
Multidimensional oligomers can be prepared using ether-anhydride intermediates or etheramine intermediates formed by reacting a suitable hub with nitrophthalic anhydride or aminophenol.
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Lubowitz Hyman R.
Sheppard Clyde H.
Hampton Hightower P.
Kight III John
The Boeing Company
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