A thermoplastic moulding compound based on a polyamide-imide, characterised by the following composition: 30-100 % by weight of at least one polyamide-imide based on one or more different imido-dicarboxylic acids or derivatives thereof, and cycloaliphatic diamines selected from the group consisting of: bis-(4-amino-3-methylcyclohexyl)-methane (MACM), bis-(4-amino-cyclohexyl)-methane (PACM), bis-(4-amino-3-ethyl-cyclohexyl)-methane (EACM), bis-(4-amino-3,5-dimethy-cyclohexyl)-methane (TMDC), 2,6-bis-(aminomethyl)-norbornane, 1,3-bis-(aminomethyl)cyclohexane, 1,4-bis-(aminomethyl)cyclohexane, 2,2-(4,4'-diaminodicyclohexyl)propane (PACP) or mixtures of these cycloaliphatic diamines, wherein the imido-dicarboxylic acids or derivatives thereof are selected from the group of imido-dicarboxylic acids having the following structural formulas: wherein: ASL = (CH 2) 5-11, phenylene, (ylomethyl)phenyl, bis(ylomethyl)benzene, cyclohexanediyl, (ylomethyl)cyclohexyl, bis(ylomethyl)cyclohexane, cyclopentanediyl, (ylomethyl)cyclopentyl, bis(ylomethyl)cyclopentane, R = OH, O-alkyl, O-aryl, Cl, NH-ASL-COOH, Br, O- -alkyl, O- -aryl, R1 = H, methyl, ethyl, propyl, with the provision that the ring can be substituted once or twice, and, with double substitution of the ring, the two substituents can be selected from the group, but may be different; with the proviso that the transparent polyamide-imide is free from building blocks in which said cycloaliphatic diamines are, with at least one amino-group thereof, forming the imido-element of imido-aminocarboxylic acids corresponding to said imido-dicarboxylic acids and in which said cycloaliphatic diamines are replacing the structural element N-ASL-COR therein, and with the proviso that the transparent polyamide-imide is free from aromatic diamines; 0-70 % by weight of reinforcing agents and/or fillers; 0-50 % by weight of additives and/or further polymers, different from the polyamide-imide, wherein the components A to C together give 100 %. 30-100 % by weight of at least one polyamide-imide based on one or more different imido-dicarboxylic acids or derivatives thereof, and cycloaliphatic diamines selected from the group consisting of: bis-(4-amino-3-methylcyclohexyl)-methane (MACM), bis-(4-amino-cyclohexyl)-methane (PACM), bis-(4-amino-3-ethyl-cyclohexyl)-methane (EACM), bis-(4-amino-3,5-dimethy-cyclohexyl)-methane (TMDC), 2,6-bis-(aminomethyl)-norbornane, 1,3-bis-(aminomethyl)cyclohexane, 1,4-bis-(aminomethyl)cyclohexane, 2,2-(4,4'-diaminodicyclohexyl)propane (PACP) or mixtures of these cycloaliphatic diamines, wherein the imido-dicarboxylic acids or derivatives thereof are selected from the group of imido-dicarboxylic acids having the following structural formulas: wherein: ASL = (CH 2) 5-11, phenylene, (ylomethyl)phenyl, bis(ylomethyl)benzene, cyclohexanediyl, (ylomethyl)cyclohexyl, bis(ylomethyl)cyclohexane, cyclopentanediyl, (ylomethyl)cyclopentyl, bis(ylomethyl)cyclopentane, R = OH, O-alkyl, O-aryl, Cl, NH-ASL-COOH, Br, O- -alkyl, O- -aryl, R1 = H, methyl, ethyl, propyl, with the provision that the ring can be substituted once or twice, and, with double substitution of the ring, the two substituents can be selected from the group, but may be different; with the proviso that the transparent polyamide-imide is free from building blocks in which said cycloaliphatic diamines are, with at least one amino-group thereof, forming the imido-element of imido-aminocarboxylic acids corresponding to said imido-dicarboxylic acids and in which said cycloaliphatic diamines are replacing the structural element N-ASL-COR therein, and with the proviso that the transparent polyamide-imide is free from aromatic diamines; ASL = (CH 2) 5-11, phenylene, (ylomethyl)phenyl, bis(ylomethyl)benzene, cyclohexanediyl, (ylomethyl)cyclohexyl, bis(ylomethyl)cyclohexane, cyclopentanediyl, (ylomethyl)cyclopentyl, bis(ylomethyl)cyclopentane, R = OH, O-alkyl, O-aryl, Cl, NH-ASL-COOH, Br, O- -alkyl, O- -aryl, R1 = H, methyl, ethyl, propyl, with the provision that the ring can be substituted once or twice, and, with double substitution of the ring, the two substituents can be selected from the group, but may be different; with the proviso that the transparent polyamide-imide is free from building blocks in which said cycloaliphatic diamines are, with at least one amino-group thereof, forming the imido-element of imido-aminocarboxylic acids corresponding to said imido-dicarboxylic acids and in which said cycloaliphatic diamines are replacing the structural element N-ASL-COR therein, and with the proviso that the transparent polyamide-imide is free from aromatic diamines; 0-70 % by weight of reinforcing agents and/or fillers; 0-50 % by weight of additives and/or further polymers, different from the polyamide-imide,