Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1992-01-22
1992-09-22
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
524600, 524879, 528176, 528288, 528322, 528342, 528350, 528352, C08G 6926, C08G 6308, C08G 7500, C08G 6700
Patent
active
051497603
ABSTRACT:
Polyimides having a high thermal and oxidative stability are prepared by reacting a mixture of monomers comprising (a) a dialkyl, trialkyl, or tetraalkylester of an aromatic tetracarboxylic acid, (b) an aromatic diamine, and (c) an end cap compound. The ratio of (a), (b), and (c) is chosen so that upon heating the mixtures, low molecular weight prepolymers are formed, the prepolymers having only one end cap radical and being suitable for chain extension and crosslinking to form high molecular weight, thermally stable polyimides. Upon heating, the prepolymers form polyimide resins, which can have T.sub.g in excess of 600.degree. F. and superior physical properties.
REFERENCES:
patent: 3407176 (1968-10-01), Loncrini
patent: 3459706 (1969-08-01), Schweitzer
patent: 3505295 (1970-04-01), Grunsteidl et al.
patent: 3745149 (1973-07-01), Serafini et al.
patent: 4058505 (1977-11-01), D'Alelio
patent: 4111906 (1978-09-01), Jones et al.
patent: 4166170 (1979-08-01), St. Clair
patent: 4189560 (1980-02-01), Roth et al.
patent: 4203922 (1980-05-01), Jones et al.
patent: 4391967 (1983-07-01), Nimry et al.
patent: 4417045 (1983-11-01), Nimry et al.
patent: 4456653 (1984-06-01), Ruegg et al.
patent: 4801682 (1989-01-01), Scola
T. T. Serafini, P. Delvigs and G. R. Lightsey, Materials for '72, SAMPE, Azusa, CA, 1972.
P. Delvigs, T. T. Serafini and C. F. Lightsey, Materials for '72, SAMPE, Azusa, CA 1972.
T. L. St. Clair and R. A. Jewell, NASA TM-74944, National Aeronautics and Space Administration, Washington, D.C., 1978.
T. T. Serafini and R. D. Vannucci, in Reinforced Plastics--Milestone 30, p. 14-E1, Society of Plastics Industry, INc., New York, 1975, NASA TMX-71616.
T. T. Serafini, R. D. Vannucci and W. B. ALston, NASA TM-71894, National Aeronautics and Space Administration, Washington, D.C., 1976.
P. Delvigs, Investigation of a 700.degree. F. Laminating Resin, Proceedings of Second Technical Conference on Polyimides, Ellenville, New York, Nov. 1985.
T. T. Serafini, Precessable High Temperature Resistant Polymer Matrix Materials, Proceedings, ICCM 1, vol. 1, AIME, New York, p. 202, 1976.
F. L. Horwitz, Influence of Excess Diamine on Properties of PMR Polyimide Resins and Composities, NASA TMX-81580, 1980.
R. D. Vannucci, PMR Polyimide Compositions for Improved Performance at 371.degree. C., NASA, SAMPE Apr. 6-9, 1987.
Matrix Resin Development, vol. 11--Technical Proposal, Feb. 29, 1988.
First Technical Progress Report Entitled Matrix Resin Development from TRW to Northrop Corp. (DRAFT).
Technical Progress Report to Northrop Corp. from Jan. 16, 1989 to Feb. 15, 1989.
Submission to the General Electric Company for Studyt entitled: Processable 700.degree. F. Matrix Resins, Sep. 28, 1987.
Billmeyer, Jr., F., Textbook of Polymer Science, 2nd Ed., John Wiley and Sons, Inc., New York, p. 231.
Browning, C., New Applications from New Materials, in Margolis, J., Advanced Thermoset Composites, Van Nostrand Reinhold, New York, pp. 1-20.
Delvigs, Peter et al., Addition-Type Polyimides from Solutions of Monomeric Reactants, NASA TN D-6877, Aug. 1972.
Meares, P., Polymers Structure and Bulk Properties, D. Van Norstrand Company, Ltd., London, p. 265.
Serafini, T. et al., Highly Processable 371.degree. C. (700.degree. F.) Polyimides, 22nd Internatioal SAMPE Technical Conference, Boston, MA, 1990.
Serafini, T., PMR Polyimide Composites for Aerospace Applications, in Polyimides, edited by K. L. Mittal, Plenum Press, New York, pp. 957-975.
Vannucci, R., PMR Polyimide Compositions for Improved Performance at 371.degree. C., SAMPE Quarterly, vol. 19, No. 1, Oct. 19, 1987, pp. 31-36.
Cheng Paul G.
Serafini Tito T.
Ueda Kenneth K.
Wright Ward F.
Goldstein Sol L.
Kight III John
Mosley T.
Sheldon Jeffrey G.
TRW Inc.
LandOfFree
Halogenated polyimide resins prepared by addition reactions does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Halogenated polyimide resins prepared by addition reactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Halogenated polyimide resins prepared by addition reactions will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1068946