Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1989-06-29
1990-09-25
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528176, 528183, 528191, 528194, C08G 6302, C08G 6360
Patent
active
049594486
ABSTRACT:
Liquid crystalline side-chain polyesters prepared by polycondensing a dicarboxylic acid or a derivative thereof with a diol of a certain general formula. Of such diols the essence is that they have a delocalized .pi. electron system to which both an electron donor group and an electron acceptor group are coupled directly (D.pi.A-system). Because of the structure of the diol to which the D.pi.A-system is linked the polyesters exhibit excellent Tg and Tc values. The polyesters are to be used in optical waveguides or for optical data storage.
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Erdhuisen Erwin W. P.
Wreesmann Carel T. J.
Akzo N.V.
Anderson Harold D.
Morris Louis A.
Mosley T.
Vickrey David H.
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