Patent GB-1512691-A (GB)
Title: Nitrogen-containing aromatic polymers
IPC: C08G73/06
Filed: 1975-05-30
Abstract: 1512691 Nitrogen containing aromatic polymers TEIJIN Ltd 30 May 1975 [31 May 1974 7 June 1974 27 Sept 1974] 23689/75 Heading C3R The invention comprises nitrogen-containing aromatic polymers having units of formula wherein A<1> is an aromatic group having a valence of (3+l), and the two nitrogen atoms, Z and W<1> are all bonded to the nuclear carbon atoms of the aromatic group A<1>; A<2> is an organic group group having a valence of (2 + m); Z is -SO2- or -CO-; p is 0 or 1, and when p is O, -A<1> is directly bonded to Y; Y is -O- or in which R<1> is a hydrogen atom or a monovalent hydrocarbon residue, and the two nitrogen atoms bonded to A<1> are bonded to the nuclear atoms at the ortho-position of the aromatic group A<1>; B is a hydrogen atom or a bond with X in which case N-X forms a double bond; X is an atomic grouping which forms a 5- membered or 6-membered ring together with the two nitrogen atoms and the two carbon atoms in adjacent positions of the aromatic group A<1> to which these nitrogen atoms are attached. l and m are each from 0 to 3; when p is O,Y is and the W<1> group is bonded to the nuclear carbon atom at the ortho-position of the aromatic group A<1> together with Y, W<1>, Y and A<1> can form another 5-membered or 6-membered ring and when W<1> does not form a 5- or 6- membered ring, W<1> and W<2> are identical or different and represent at least one primary amino group or a mono- or di-substituted nitrogen-containing group derived from a primary amino group. The polymers are obtained by reacting an aromatic polyamine of formula wherein the various symbols are as above and the -NH2 group and the -NH- group are bonded to nuclear carbon atoms of A<1> in positions ortho to one another, with a reagent capable of reacting with the secondary and primary amino groups bonded to the aromatic group A<1> to form a 5- or 6-membered ring. In examples various aromatic polyamines of Formula IV having the -NH- and -NH2 groups attached to adjacent carbon atoms of benzene rings and having in the polymer units phenylene groups and other linkages, e.g. -O-, -SO2-, -C(CH3)2- -CO- and -CO-NH, are converted to polymers of the invention; polymers where -X- is -CO- are obtained by reaction with ethyl chlorocarbonate, phenyl chlorocarbonate, phenyl isocyanate, diphenyl carbonate, diphenyl urethane, benzoyl chloride, acetyl chloride, 2,4-dinitrophenyl acetate, benzaldehyde, trichlorotoluene and benzonitrile; a polymer where X is -CO-CO- is obtained by reaction with oxalyl chloride; a polymer where Z is -CS- is obtained by reaction with thionyl chloride; a polymer where X is -P(C6H5) is obtained by reaction with phenyl phosphonyl dichloride; a polymer where X is = N- is obtained by reaction with sodium nitrite; a polymer where X is -Si(CH3)2- is obtained by reaction with dimethyl silyl dichloride; a polymer where X is -S-S- is obtained by reaction with sulphur chloride, a polymer where X is -B(C6H5)- is obtained by reaction with triphenyl borate and a polymer where X is = P(C6H5)- is obtained by reaction with triphenyl phosphite. The polymers may be used to form fibres, films and permselective membranes.