Aromatic amide groups-containing diamines and polymers in which

Details Aromatic amide groups-containing diamines and polymers in which Aromatic amide groups-containing diamines and polymers in which

1989-06-28

1990-12-25

Foelak, Morton

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528347, 528348, 528342, C08G 1832, C08G 6926

Patent

active

049804448

ABSTRACT:
There is provided a new class of diamines of the formula ##STR1## wherein X=NH or O, and R represents a divalent, substituted or unsubstituted organic group having at the most 20 carbon atoms.
The diamines, wherein X has the meaning of an O-atom, may be converted with diacids, diacid dichlorides, aromatic carboxylic acid anhydrides or diisocyanates into poly(esteraramid) amides, poly(esteraramid) imides, or poly(esteraramid) urea or, when X stands for an --NH-group, into poly(amidaramid) amides, poly(amidaramid) imides, or poly(amidaramid) urea.
The wholly or largely aromatic polyamides, polyurea or polyimides are of an iterative structure. They can be melt-processed into shaped objects displaying a very good resistance to high temperatures, particularly when use is made of diamines having meta-substituted amide groups or diamines of a non-aromatic structure for the --XRX-- group, or of a non-aromatic structure of the diacids, diacid dichlorides, aromatic carboxylic acid anhydrides or diisocyanates to be linked to the diamines. By altering the chemical structure of the diamines on the one hand and the diamine-linkable bifunctional compounds on the other, both the melting performance and the level of crystallinity of the end product may be influenced.

REFERENCES:
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patent: 4623746 (1986-11-01), Kohli
Kirk-Othmer, Encyclopedia of Chemical Technology, 3rd Ed., vol. 3 (1978), pp. 229-237.
Yamazaki et al, Journal of Pol. Sci., vol. 13 (1975), pp. 1373-1380.

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