Method for preparing aromatic compounds

Details Method for preparing aromatic compounds Method for preparing aromatic compounds

1998-01-28

1998-12-15

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

558420, 562474, C07D30789, C07C 5108

Patent

active

058499342

ABSTRACT:
A perfluorinated polyimide comprising a repeating unit represented by general formula (1): ##STR1## and a perfluorinated poly(amic acid) comprising a repeating unit represented by general formula (6): ##STR2## wherein R.sub.1 is a tetravalent organic group; and R.sub.2 is a divalent organic group, provided that chemical bonds between carbon atoms and monovalent elements contained in R.sub.1 and R.sub.2 are exclusively carbon-to-fluorine bonds; methods for preparing them; and optical material including the perfluorinated polyimide. 1,4-Bis(3,4-dicarboxytrifluorophenoxy)-tetrafluorobenzene dianhydride, 1,4-difluoropyromellitic anhydride, 1,4-bis(3,4-dicarboxytrifluorophenoxy)-tetrafluorobenzene, 1,4-difluoropyromellitic acid, and 1,4-bis(3,4-dicyanotrifluorophenoxy)-tetrafluorobenzene as well as methods preparing them. The perfluorinated polyimide has a thermal stability and has a low optical loss in an optical communication wavelength region (0.8 to 1.7 .mu.m).

REFERENCES:
patent: 3356648 (1967-12-01), Rogers
patent: 3959350 (1976-05-01), Rogers
patent: 4760126 (1988-07-01), Numata et al.
patent: 5009679 (1991-04-01), Angus et al.
patent: 5061784 (1991-10-01), Mueller et al.
patent: 5177179 (1993-01-01), Auman et al.
patent: 5260408 (1993-11-01), Auman et al.
"Plastic optical fibers for near-infrared transmission", Kaino, Applied Phys. Lett. 48 (12) Mar. 24, 1986, pp. 757-758.
"Optical Waveguiding in Polyimide", Franke et al. SPIE, vol. 651, Integrated Optical Circuit Engineering, III, pp. 102-107, 1986.
"Optical waveguide circuits for printed wire-board interconnections", Sullivan, SPIE, vol. 994, Optoelectronic Materials, Devices, . . . II, pp. 92-100, 1988.
"Evaluation of Colorless Polyimide Film for Thermal Control Coating Applications", St. Clair et al., SAMPE Journal, Jul./Aug., pp. 28-33, 1985.
"Evaluating polyimides as lightguide materials", Rueter et al., Applied Optics, vol. 27, No. 21, pp. 4565-4571 (1988).
"Polyimides Based on 3.6-Diphenoxpryomellitic Dianhydride", Brandelik et al., ACS Polymer Preprint, 28 (1), pp. 88-89, 1987.
"Perfluoralkylene-Linked Aromatic Polyimides", Critchley et al., J. Polym. Sci., A-1, 10, pp. 1789-1807, 1972.
"Syntheses of Fluoroorganic Compounds", ed. Knunyants et al., Springer-Verlag, Berlin, pp. 193-232, 1985.
L. Kobrina et al., Zh. Obshch, Khim, 38, 514, 1968.
"Aromatic Nucleophylic Substitution XVII. The Derivatives of Polyfluorrintated Diphenylsulphide and Diphenylsulphone", G. Furin et al. SSSR, Ser. Kihm., 1976.
"Trifluoromethylation of Aromatic Compounds", Kobayashi et al., Tetrahedron Letters, 47, pp. 4095-4096, 1969.
Polymer Preprints, Japan, vol. 40, No. 3, pp. 826-830, 1991, Items III-11-07 to 11-11, May 10, 1991.
Polymer Preprints, Japan, vol. 39, No. 3, pp. 790-794, 1990, Items III-11-01 to 11-05.
Polymer Preprints, Japan, vol. 38, No. 3, pp. 433-436 and 798, 1989, Items 13H-03 to 06 and 15Pb14.
"Synthesis and Properties of Novel Fluorinated Polyimides", Preprint of First Pacific Polymer Conference, Dec. 12-15, 1989, Maui, Hawaii.
Mochizuki, H., et al., Chemical Abstracts, vol. 112, Abstract No. 112:88030 1990.
J. Duncan et al., "Effect of Structural Rearrangement on the Mollusicidal Activity of Certain Fluorinated Aromatic Compounds", Chem. Abstr., vol. 73: 76068f, 1970, pp. 820-825.
Ando et al., Magn. Reson. Chem., 1995, 33(8), 639-645.
Okumura et al., Chem. Abst., 120: 298457, 1994.
Kaieda et al., Chem. Abst., 121:35030, 1994.
Ando et al., Polym. Mater Sci. Eng., 1992, 66, 200-201.

Affiliated with

Also associated with

Rating

Method for preparing aromatic compounds does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for preparing aromatic compounds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing aromatic compounds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1459587