Polyketone fibers and a process for making same

D - Textiles – Paper – 01 – F

Patent

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Details

D01F 6/26 (2006.01) C08F 116/36 (2006.01) D01D 5/06 (2006.01) D01F 6/30 (2006.01)

Patent

CA 2042099

A novel fiber of an alternating carbon monoxide-ethylene polymer having an estimated molecular weight of at least 100,000 g/mole, which fiber has a birefringence of at least 650 x 10-4 is disclosed. A novel process for making a high tensile strength and high modulus fiber from a linear alternating polymer of carbon monoxide and ethylene having an estimated molecular weight of at least 100,000 g/mole is disclosed which comprises extruding a solution of the polymer in a mixture of solvents, at least one of which is an aromatic alcohol being free of alkyl radical substituents on the aromatic nucleus and another of which is a liquid other than an aromatic alcohol, into a shaped solvent-containing article at an extrusion rate of at least 1 m/min. The article is solidified by cooling or coagulating in a non-solvent for the polymer, and the solvent is removed from it by extraction with a non-solvent for the polymer which is soluble in the mixture of solvents, whereupon the article is drawn at a temperature of at least 180°C.

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