Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1989-02-24
1992-12-29
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528126, 528128, 528170, 528171, 528172, 528173, 528174, 528175, 528179, 528183, 528185, 528188, 528220, 528229, 528350, 528351, C08G 6926
Patent
active
051752425
ABSTRACT:
A new class of soluble phenylated polyimides made from 3,6-diarypyromellitic dianhydride and process for the manufacture of the 3,6-diarypyromellitic dianhydride starting material. The polyimides obtained with said dianhydride are readily soluble in appropriate organic solvents and are distinguished by excellent thermal, electrical and/or mechanical properties making the polyimides ideally suited as coating materials for microelectronic apparatii, as membranes for selective molecular separation or permeation or selective gas separation or permeation, or as reinforcing fibers in molecular composites, or as high modulus, high tensile strength fibers.
REFERENCES:
patent: 3415782 (1960-12-01), Irwin
patent: 4239880 (1980-12-01), Darms
patent: 4485140 (1984-11-01), Gannett et al.
patent: 4640972 (1987-02-01), Irwin
"Phenylated Monomer Synthesis: Trans-2,3-Diphenyl-2-Butenedial and 3,6-Diphenylpyromellitic Dianhydride", Masters Thesis 1986, Shaowo Liang.
Hampton-Hightower P.
Kight III John
The University of Akron
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