Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1988-03-17
1989-05-23
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528185, 528212, 528219, 528272, 528295, 528308, C08G 6300
Patent
active
048332283
ABSTRACT:
A linear rodlike polyester of controlled rigidity and packing density which melts below 350.degree. C. and consists essentially of recurring units of the formula (1) ##STR1## in which A, B, C and D are the same or different cyclic moieties selected from the group consisting of 1,4-phenylene and 1,4-cyclohexylene; n is Zero or 1; Z.sup.1, Z.sup.2 and Z.sup.3 are the same or different and are selected from the group of bivalent links consisting of the covalent bond (--) and of linkages --COO--, --OOC--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, --OCH.sub.2 CH.sub.2 O--, --OCH.sub.2 OCH.sub.2 -- and --CH.sub.2 OCH.sub.2 O--; X.sup.1, X.sup.2, X.sup.3 and X.sup.4 are the same or different and are selected from the group consisting of aliphatic substituents consisting of 2 to 8 carbon atoms in a straight or branched chain in which one, two or three of said carbon atoms may be replaced by oxygen atoms such that any said oxygen atom is directly attached to two of said carbon atoms of said chain; r, s, t and u are selected from the group consisting of Zero and integers of 1 to 4; certain provisos must be observed to achieve optimum properties.
REFERENCES:
patent: 4067852 (1978-01-01), Calundann
patent: 4102864 (1978-07-01), Deex et al.
patent: 4118372 (1978-10-01), Schaefgen
patent: 4161470 (1979-07-01), Calundann
patent: 4184999 (1980-01-01), Olander
patent: 4219461 (1980-08-01), Calundann
patent: 4327206 (1982-04-01), Jackson, Jr. et al.
Acquah S. A.
Welsh Maurice J.
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