Electrically conductive alternating copolymer and method of prep

Details Electrically conductive alternating copolymer and method of prep Electrically conductive alternating copolymer and method of prep

1993-01-08

1995-01-10

Nagumo, Mark

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526256, 526259, 526268, 528229, 252500, C08G 1600, C08G 1200

Patent

active

053808070

ABSTRACT:
Polycondensation of, for example, squaric acid with a benzodihydropyrrole, benzodithiazole, neocuproine, terthienyl or an aromatic diamine gives a semiconductive alternating copolymer having a small band gap. It is alternatively possible to use croconic acid or 5,6-dihydroxy-5-cyclohexene-1,2,3,4-tetraone instead of squaric acid. An alternating copolymer of croconic acid and a methyl-substituted benzodithiazole has the following repetititve unit: ##STR1##

REFERENCES:
Ew Neuse et al (1975) Macromal 8(6), 730-734.
CA101(18): 15 2542v [Naarman et al DE 3246319A1 (Jun. 1984)].
"Polymer Superpolyamides" Gauger et al, Chemical Abstracts, vol. 75, No. 10 Sep. 6, 1971, (Abstract) No. 64331q.
"Amides and Thioamides of Squaric Acid" Ehrhardt et al, Chemical Abstracts vol. 87, No. 19, Nov. 7, 1977 (Abstract) No. 151727q.
"Polar Polyamides" Manecke et al, Chemical Abstracts, vol. 71, No. 14, Oct. 6, 1969, (Abstract) No. 61825K.
"Squaric Acid-1,3-Polyamides" Manecke et al, Chemical Abstracts, vol. 83, No. 4, Jul. 28, 1975, (Abstract) No. 28639C.
"Poly(Squaryl Amides)" Neuse et al, Chemical Abstracts, vol. 81, No. 24, Dec. 16, 1974 (Abstract) No. 152677M.
Chemical Abstracts, vo. 71, 1969, Abstract No. 81344F.
"Introduction to Solid State Physics" 5th Edition, John Wiley & Sons 1976. p. 210.
"New Alternating Conductive Heteropolymers" Kowalik et al, Synthetic Metals, 41-43 (1991) 435-438.
"Light Absorption of Organic Colorants" J. Fabian et al, Springer Verlag, Berlin, 1980, p. 189.
Chemical Abstracts, vol. 76, 1972, Abstract No. 72434M.

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