Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1989-05-30
1993-12-07
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528173, 528176, 528190, 528191, 528193, 528194, 528271, 428290, C08G 6306, C08G 6318, C08G 6360, C08L 6706
Patent
active
052684431
ABSTRACT:
The invention relates to a class of copolymers capable of forming an optically anisotropic melt comprising recurring structural units (a) independently each occurrence selected from the group consisting of Formula I; recurring structural units (b) independently each occurrence selected from the group consisting of Formulas II and III; and optionally recurring structural units (c) independently each occurrence selected from the group consisting of Formula IV: ##STR1## wherein R independently each occurrence is a chemically inert substituent.
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Brewbaker James L.
Marshall William B.
Foelak Morton
Hampton-Hightower P.
The Dow Chemical Company
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