To provide a carbon film having a sufficiently large coefficient of separation and an improved transmission rate compared to a conventional material and to provide a method for manufacturing the film.
The carbon film is obtained by applying a polyamic acid expressed by general formula (3) on the surface of a porous substrate, heating and drying the substrate to form a precursor of the carbon film and thermally decomposing the precursor in an oxygen inactive atmosphere. The compound expressed by general formula (3) is a precursor of polyimide resin expressed by general formula (1). In the formulae, X represents a 2-27C tetravalent group in aliphatic groups, alicyclic groups, monocyclic aromatic groups or the like, n represents an integer from 5 to 10,000, Y is expressed by general formula (2), wherein at least one of phenylene groups constituting the main chain skeleton is m-phenylene group, Z represents a direct bond, -O-, -CO- or the like, m represents an integer from 1 to 3, and each of R1-4 and R'1-4 represents a phenyl group, 4-phenylphenyl group, phenoxy group, 4-phenylphenoxy group or the like.
NISHIYAMA NORIKAZU
MOMOSE WATARU
EGASHIRA YASUYUKI
KAMIYAMA KOREICHI
TAMAI MASAJI
KAMIYAMA KOREICHI
MITSUI CHEMICALS INC
Next Patent: CARBON FOAM AND GRAPHITE FOAM