Anisotropic polyesteramide polymers having improved retention of

Details Anisotropic polyesteramide polymers having improved retention of Anisotropic polyesteramide polymers having improved retention of

1982-11-03

1985-02-12

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528173, 528183, 528184, 528185, 528190, 528193, 528194, C08G 6944

Patent

active

044992564

ABSTRACT:
An anisotropic-melt-forming polymer having improved stiffness retention at elevated temperatures comprising residues selected from residues (A) of dihydric phenols, aromatic dicarboxylic acids, hydroxyaromatic acids, aromatic diamines, aminophenols and aminoaromatic acids wherein at least 40 mole % of the residues (A) have their chain extending bonds in either coaxial or parallel and oppositely directed relationship and sufficient of non-linear residues (B) selected from at least one of: ##STR1## to give a polymer having an improved retention of stiffness at elevated temperature compared with an otherwise similar polymer not containing said residues (B).

REFERENCES:
patent: 4299756 (1981-11-01), Calundann
patent: 4330457 (1982-05-01), East et al.
patent: 4339375 (1982-07-01), Calundann et al.
patent: 4341688 (1982-07-01), Charbonneau et al.
patent: 4351917 (1982-09-01), Calundann et al.
patent: 4351918 (1982-09-01), Charbonneau et al.
patent: 4355132 (1982-10-01), East et al.
patent: 4355133 (1982-10-01), East et al.
patent: 4398019 (1983-08-01), Cox et al.

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