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US 4,049,637 AGranted
Polymer prepared from hydrazine and tricarboxylic acid derivatives and method of preparation
AssigneePPG Industries, Inc.
InventorsKarl F. Schimmel, Marco Wismer
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Abstract
Novel polymers formed from the reaction of tricarboxylic anhydrides and hydrazines or hydrazides which may be cross-linkable by further reaction with a hydrazine or hydrazide are disclosed.
Claims2
The method of producing a high temperature polymer comprising mixing a tricarboxylic monoanhydride with a monofunctional alcohol and heating at reflux the mixture so formed to thereby form an ester-acid having the structural formula:
- ##STR12## mixing said ester acid with a sufficient amount of a member selected from the group consisting of a hydrazine and a hydrazide, to thereby form a polysalt having the structural formula:
- ##STR13## and heating said polysalt at a temperature sufficient to form a high temperature resistant polymer having the structural formula:
- ##STR14## where R is a trivalent organic radical having at least two carbon atoms;
- R.sub.1 is a divalent organic radical having at least two carbon atoms;
- R.sub.2 and R.sub.3 are selected from the group consisting of alkyl, aryl, aralkyl, cycloalkyl, and hydrogen radicals and x and y are either 1 or 0.
2 more elements
The reaction product of an organic condensation polymer consisting essentially of the repeating structural formula:
- ##STR15## reacted with a compound of the repeating structural formula:
- ##STR16## wherein R.sub.1 is a divalent organic radical selected from the group consisting of alkylene, arylene, alkylarylene;
- R is a ketone or aliphatic chloro, bromo, or iodo functional, R.sub.2 and R.sub.3 are monovalent alkyl, aryl, aralkyl, cycloalkyl radicals or hydrogen and x and y are either 1 or 0.
Dependencies are inferred from the claim text.