Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1995-04-10
1996-06-25
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528 15, 528 19, 528 21, 528315, 528319, 528321, C08G 7310
Patent
active
055300901
ABSTRACT:
Macrocyclic oligomer mixtures, particularly polyimide oligomer mixtures, are prepared by the treatment of a dihalo-substituted organic compound or the like under reducing conditions, preferably by a complex of a zerovalent Group VIII metal. Cyclization takes place by reductive dehalogenation.
REFERENCES:
patent: 3890272 (1975-06-01), D'Alelio
patent: 5357029 (1994-10-01), Takekoshi et al.
patent: 5399715 (1995-03-01), Naitoh et al.
Colquhoun et al., J. Chem. Soc., Chem Commun. The month of publication is not available. 1990, 336-339.
Acquah Samuel A.
General Electric Company
Hampton-Hightower P.
Pittman William H.
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