Process for the production of carbon fibers
AssigneesJapan Exlan Company Limited, Sumitomo Chemical Company, Limited
InventorKunio Maruyama
Life of this patent
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Abstract
A process is provided for producing carbon fibers characterized by fixing a specified amount of a chemical substance onto thermally stabilized fibers and/or carbonized fibers to impart good collectivity and then carbonizing and/or graphitizing the fibers, said chemical substance selected from one or more of the compounds of glycerin, polyethylene glycol, polypropylene glycol and alkyl derivatives thereof.
Claims5
An improved process for the production of carbon fibers characterized by fixing 0.1-5 weight % of a chemical substance selected from the group consisting of glycerin, polyethylene glycol, polypropylene glycol, and alkyl derivatives thereof, and mixtures or compounds of two or more of these chemical substances onto thermally stabilized carbon precursor fibers and/or carbonized fibers to give the fibers good collectivity, and carbonizing the thermally stabilized fibers and/or graphitizing the fibers, said alkyl derivatives being selected from ether compounds obtained by reacting said chemical substances with an alcohol selected from the group consisting of methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, pentanol and hexanol or ester compounds obtained by reacting said chemical substances with an organic acid selected for the group consisting of formic acid, acetic acid, oxalic acid, malonic acid, succinic acid, butyric acid, lactic acid and malic acid.
Dependencies are inferred from the claim text.