Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1982-09-08
1984-05-22
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528271, 528310, 528331, 528362, C08G 7300
Patent
active
044502680
ABSTRACT:
The invention relates to metal, primarily divalent metal such as divalent copper, cobalt and nickel, 4,4',4", 4'" phthalocyanine tetracarboxylic acids and to polymers prepared by heating the same, and to a method of preparing the tetracarboxylic acids.
A method is provided for preparing the aforesaid tetracarboxylic acids in purer form than heretofore. Upon heating these acids decarboxylate and produce polymers.
These polymers have diphenyl (conjugated) types of linkage; they are thermally and oxidatively stable and useful as sheet polymers for various purposes such as heat shielding.
The monomeric tetracarboxylic acid is shown in FIG. 1, the polymer in FIG. 2 and thermal resistance in FIG. 3.
The monomeric tetracarboxylic acids are prepared in purer form than heretofore, the resulting polymers are more stable thermally and oxidatively than metal phthalocyanine polymers and monomers heretofore made.
REFERENCES:
patent: 4304719 (1981-12-01), Wynne et al.
Achar Bappalige N.
Fohlen George M.
Parker John A.
Anderson Harold D.
Brekke Darrell G.
Manning John R.
Marchant Robert D.
The United States of America as represented by the Administrator
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