Ekkcel 1-2000, aromatic polyesters

The tensile strength of this copolymer (EKKCEL 1-2000) is 14,000 psi at room temperature, and 3,000 psi at 500°F. Its heat deflection temperature is 560°F, and the upper use temperature for the polymer will probably be in the range of —575°F. The water absorption is extremely low for this material, as it is for all the aromatic polyesters described here. 

In 1972, Cottis and coworkers at Carborundum patented wholly aromatic polyesters based on p-hydroxybenzoic acid (HBA), A,A -dihydrox-ybiphenyl (DHB), and terephthalic acid (TPA), one of which was later commercialized as EKKCEL 1-2000 [1]. In 1974, Kuhfuss and coworkers at Eastman Kodak reported a new polyester based on HBA and polyfethylene terephthalate) (PET), which was later marketed under the code of X-7G. X-7G is the first thermotropic liquid crystalline polymer to be fabricated by injection molding or melt spinning [2]. However, then Eastman Kodak withdrew its plan of marketing of X-7G and changed the target with a wholly aromatic polyester commercialized as TITAN (THERMX ) in 1996. As described later, it was acquired by DuPont in 2003. 

MELT PRXESSABLE WHOLLY AROMATIC POLYESTER -EKKCEL 1-2000 (CARBORUNDUM)... 

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