Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1994-12-16
1998-04-21
Hampton-Hightower, P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528128, 528172, 528173, 528176, 528185, 528188, 528220, 528229, 528350, 524600, 524606, 526935, 478396, 4784735, 4784111, C08G 7310, C08G 6926
Patent
active
057418837
ABSTRACT:
Tough, soluble, aromatic, thermoplastic copolyimides were prepared by reacting 4,4'-oxydiphthalic anhydride, 3,4,3',4'-biphenyltetracarboxylic dianhydride and 3,4'-oxydianiline. These copolyimides were found to be soluble in common amide solvents such as N,N'-dimethyl acetamide, N-methylpyrrolidinone, and dimethylformamide allowing them to be applied as the fully imidized copolymer and to be used to prepare a wide range of articles.
REFERENCES:
patent: 5147966 (1992-09-01), St. Clair et al.
patent: 5171828 (1992-12-01), Meterko et al.
patent: 5268446 (1993-12-01), Tamai et al.
Polymer Preprints 35(1), Mar., 1994, Smith et al "Chemistry & Properties of Phenylethynyl Phthalic Anhydride Imide Oligomers", pp. 353-354.
Journal of Polymer Science Part A 32(16), pp. 3061-3067, Hergenrother et al, "Phenylethynyl-terminated Imide Oligomers & Polymers Therefrom".
Polymer Preprints, vol. 35, No. 1, Mar. 1, 1994, Bryant, pp.517-518, "A Soluble copolyimide".
Hampton-Hightower P.
Helfrich George F.
The United States of America as represented by the Administrator
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