Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1997-05-07
1998-11-24
Hampton-Hightower, P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528170, 528310, 528322, 428364, 428395, 2641761, 264178F, 264182, 264184, 264185, 264203, 264205, 264206, 2642108, 26421114, 26421116, 264234, C08G 7310, D02G 300, D01F 604, D01F 600
Patent
active
058408282
ABSTRACT:
A polyimide fiber having textile physical property characteristics and the process of melt extruding same from a polyimide powder. Polyimide powder formed as the reaction product of the monomers 3,4'-ODA and ODPA, and endcapped with phthalic anhydride to control the molecular weight thereof, is melt extruded in the temperature range of 340.degree. C. to 360.degree. C. and at heights of 100.5 inches, 209 inches and 364.5 inches. The fibers obtained have a diameter in the range of 0.0068 inch to 0.0147 inch; a mean tensile strength in the range of 15.6 to 23.1 ksi; a mean modulus of 406 to 465 ksi; and a mean elongation in the range of 14 to 103%.
REFERENCES:
patent: 5147966 (1992-09-01), St. Clair et al.
patent: 5248471 (1993-09-01), Kanesh
patent: 5670256 (1997-09-01), St. Clair et al.
Fay Catharine C.
St. Clair Terry L.
Working Dennis C.
Hampton-Hightower P.
Helfrich George F.
The United States of America as represented by the Administrator
Womack Hillary T.
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