Steam-resistant transparent polyamides

A polyamide moulding compound comprising at least one copolyamide formed at least from the polyamide units AB/AC/D,

• wherein:
• (A) is selected as at least one cycloaliphatic diamine from the group consisting of:
• bis(4-amino-3-methylcyclohexyl)methane (MACM) and bis(4-aminocyclohexyl)methane (PACM);
• (B) is selected as at least one aromatic dicarboxylic acid from the group consisting of:
• isophthalic acid (I), naphthalenedicarboxylic acid, and terephthalic acid (T);
• (C) is selected as at least one aliphatic dicarboxylic acid from the group consisting of:
• decanedioic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid, tetradecanedioic acid, pentadecanedioic acid, hexadecanedioic acid;
• (D) is selected as at least one lactam or one α,ω-aminocarboxylic acid from the group consisting of:
• laurolactam (LC 12), undecanolactam (LC 11), 12-aminododecanoic acid, and 11-aminoundecanoic acid,
• wherein:
• the proportions of polyamide units AB are in the range from 30 to 45 mol %,
• the proportions of polyamide units AC are in the range from 30 to 40 mol %, and
• the proportions of polyamide units D are in the range from 20 to 32 mol %, and
• wherein the sum total of polyamide units AB, AC and D is 100 mol %.