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when n is 4, 

R$_{3 }$ is a tetravalent acyl radical of an aliphatic or unsat› urated aliphatic tetracarboxylic acid, especially 1,2,3,4- butanetetracarboxylic acid, 1,2,3,4-but-2-enetetracarboxylic acid, 1,2,3,5-pentanetetracarboxylic acid and 1,2,4,5- pentanetetracarboxylic acid, or R$_{3 }$ is a tetravalent acyl radical of an aromatic tetracarboxylic acid containing 10 to 18 carbon atoms; 

p is 1 to 3, 

R$_{4 }$ is hydrogen, alkyl of 1 to 18 carbon atoms or acyl of 2 to 6 carbon atoms; 

when pis 1, 

Rs is hydrogen, alkyl of 1 to 18 carbon atoms, an acyl radical of an aliphatic or unsaturated aliphatic carboxylic or carbamic acid containing 2 to 18 carbon atoms, an acyl radical of a cycloaliphatic carboxylic or carbamic acid containing 7 to 12 carbon atoms, an acyl radical of an 20 aromatic carboxylic acid containing 7 to 15 carbon atoms, or R$_{4 }$ and Rs together are ----(CH$_{2}$)sCO-, phthaloyl or a divalent acyl radical of maleic acid; 

when pis 2, 

Rs is alkylene of 2 to 12 carbon atoms, a divalent acyl radical of an aliphatic or unsaturated aliphatic dicarboxylic or dicarbamic acid containing 2 to 18 carbon atoms, a divalent acyl radical of a cycloaliphatic dicarboxylic or dicarbamic acid containing 7 to 12 carbon atoms, or a 30 divalent acyl radical of an aromatic dicarboxylic acid con› taining 8 to 15 carbon atoms; 

when pis 3, 

Rs is a trivalent acyl radical of an aliphatic or unsaturated aliphatic tricarboxylic acid containing 6 to 18 carbon atoms, or a trivalent acyl radical of an aromatic tricarboxylic acid containing 9 to 15 carbon atoms; 

when n is 1, 

R$_{6 }$ is alkoxy of 1 to 18 carbon atoms, alkenyloxy of 2 to 18 carbon atoms, -NHalkyl of 1 to 18 carbon atoms or -N(alkyl)$_{2 }$ of 2 to 36 carbon atoms, 

when n is 2, 

R$_{6 }$ is alkylenedioxy of 2 to 18 carbon atoms, alkenylene› dioxy of 2 to 18 carbon atoms, -NH-alkylene-NH- of 2 to 18 carbon atoms or -N(alkyl)-alkylene-N(alkyl)- of 2 to 18 carbon atoms, or R$_{6 }$ is 4-methyl-1,3- phenylenediamino, 

when n is 3, 

R$_{6 }$ is a trivalent alkoxy radical of a saturated or unsatur› ated aliphatic trial containing 3 to 18 carbon atoms, 

when n is 4, 

R$_{6 }$ is a tetravalent alkoxy radical of a saturated or unsat› urated aliphatic tetraol containing 4 to 18 carbon atoms, 

R$_{7 }$ and R$_{8 }$ are independently chlorine, alkoxy of 1 to 18 carbon atoms, -O-T 1 , amino substituted by 2-hydroxyethyl, -NH(alkyl) of 1 to 18 carbon atoms, -N(alkyl)T$_{1 }$ of with alkyl of 1 to 18 carbon atoms, or -N(alkyl)$_{2 }$ of 2 to 36 carbon atoms, 

R$_{9 }$ is a divalent oxygen atom, or R$_{9 }$ is a divalent nitrogen 65 atom substituted by either hydrogen, alkyl of 1 to 12 carbon atoms or T$_{1 }$ 

R$_{10 }$ is hydrogen or methyl, 

q is 2 to 8, 

R$_{11 }$ and R$_{12 }$ are independently hydrogen or the group 

R$_{13 }$ is hydrogen, phenyl, straight or branched alkyl of 1 to 12 carbon atoms, alkoxy of 1 to 12 carbon atoms, straight or branched alkyl of 1 to 4 carbon atoms substituted by phenyl, cycloalkyl of 5 to 8 carbon atoms, cycloalkenyl of 5 to 8 carbon atoms, alkenyl of 2 to 12 carbon atoms, glycidyl, allyloxy, straight or branched hydroxyalkyl of 1 to 4 carbon atoms, or silyl or silyloxy substituted three times indepen› dently by hydrogen, by phenyl, by alkyl of 1 to 4 carbon atoms or by alkoxy of 1 to 4 carbon atoms; 

R$_{14 }$is hydrogen or silyl substituted three times indepen› dently by hydrogen, by phenyl, by alkyl of 1 to 4 carbon atoms or by alkoxy of 1 to 4 carbon atoms; 

dis 0 or 1; 

his Oto 4; 

k is Oto 5; 

x is 3 to 6; 

y is 1 to 10; 

z is an integer such that the compound has a molecular weight of 1000 to 4000 amu, 

R$_{1}$s is morpholino, piperidino, 1-piperizinyl, alkylamino of 1 to 8 carbon atoms, especially branched alkylamino of 3 to 8 carbon atoms such as tert-octylamino, -N(alkyl)T$_{1 }$ with alkyl of 1 to 8 carbon atoms, or -N(alkyl)$_{2 }$ of 2 to 16 carbon atoms, 

R$_{16 }$is hydrogen, acyl of 2 to 4 carbon atoms, carbamoyl substituted by alkyl of 1 to 4 carbon atoms, s-triazinyl substituted once by chlorine and once by R$_{1}$s, or s-triazinyl substituted twice by R$_{1}$s with the condition that the two R$_{1}$s substituents may be different; 

R$_{17 }$is chlorine, amino substituted by alkyl of 1 to 8 carbon atoms or by T$_{1}$ , -N(alkyl)T$_{1 }$ with alkyl of 1 to 8 carbon atoms, -N(alkyl)$_{2 }$ of 2 to 16 carbon atoms, or the group T$_{3 }$ 

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