(US5093033-A)      Intrinsically electrically conductive polymer has 3 to 10 structural units which are mutually linked in the 2- and/or 5- position. The units comprise, as a statistical mean, a) 60-100 wt.% of structural units which are derived from at least one monomer of formula (I). Where, R' is 1-12C alkoxy or -O(CH2CH2O)nCH3 (n is 1-4); R2 is H, 1-12C alkyl or alkoxy or -O(CH2CH2O)nCH3 or R1 and R2 together are -O(CH2)m-CH2 or - O(CH2)m-O- (m is 1-12).    b) 0-40 wt.% are derived from at least one monomer of formula (II): where R4 and R5 are H, halogen, 1-12C alkyl or aryl or, together with the C-atoms linking them, form an aromatic ring; R3 and R6 are H or R3 with R4 and the C-atoms linking them; or R5 with R6 and the C- atoms linking them, in each case, form an aromatic ring; X is O, S, =NH, =N-alkyl or =N-aryl.    c) 0-40 wt.% are derived from at least one monomer of formula (III): in which R7-R10 are H, 1-12C alkyl, or alkoxy, or aryl; Y and Z are O, S, =NH, =N-alkyl or =N-aryl; R'' is arylene, heteroarylene or a conjugated system (CH=CH). (O is 0-3); and d) 0-40 wt.% are derived from at least one monomer of formula IV. Where R12 and R13 are H, halogen, 1-12C alkyl, or alkoxy, 1-4C alkylamino or acylamino; R14 is halogen, 1-12C alkyl or alkoxy, 1-4C alkylamino or acylamino, and X is as above.    ADVANTAGE -   New polymer is homogeneously soluble in at least some conventional organic solvents, has good film-forming properties and a high thermal stability.    (JP2540166-B2)      Intrinsically electrically conductive polymer contains structural units which are bonded to one another by linking in position 2 and/or 5 and consist, by wt. as a statistical average, of (i) 60-100% structural units derived from at least one thiophene deriv. monomer having formula (I): (where R1 = 1-12C alkoxy or -O(CH2CH2O)nCH3; n = 1-4; R2 = H, 1-12C alkyl, 1-12C alkoxy or -O(CH2CH2O)nCH3 or R1 and R2 together = -O(CH2)m-CH2 or -O(CH2)mO-; m = 1-12); (ii) 0-40% structural units derived from at least one monomer having formula (II) (where R4, R5 each = H, halogen, 1-12C alkyl or aryl or R4, R5 together = with the C atoms to which they are bonded form an aromatic ring; R3,R6 each = H or R3 together with R4 and the C atoms bonding them or R5 together with R6 and the C atoms bonding them form an aromatic ring; X = -O-, -S-, -NH-, -N-alkyl-or -N-aryl-); (iii) 0-40% structural units derived from at least one monomer having formula (III) (where R7, R8, R9, R10 = H, 1-12C alkyl, 1-12C alkoxy or aryl; Y and Z each = -O-, -S-, -NH-, -N-alkyl- or -N-aryl; R11 = arylene, heteroarylene or a conjugated system having formula (CH=CH)o; o = zero, 1,2 or 3); and (iv) 0-40% structural units derived from at least one monomer having formula (IV) (where R12, R13 each = H, halogen, 1-12C alkyl, 1-12C alkoxy, 1-4C alkylamino or 1-4 acylamino; R14 = halogen, 1-12C alkyl, 1-12C alkoxy, 1-4C alkylamino or 1-4C acylamino).    USE -   The polymer is used for mixing into plastics and also for coating electrically conducting and non-conducting materials for the prodn. of catalysts, electrical switches, semiconductor components, solar cells, screening materials, camouflage paints, flat heat-conductors, special electrodes, as well as antistatic foils and fibres.