| 摘要 |
Transparent polyamides, containing residues of terephthalic acid and 2-methylpentamethylendiamine. These are characterised by the presence of residues of 2-ethyl-tetramethylendiamine and/or of isophtalic acid in a concentration altogether of 15 - 30 % by gram molecule, relative to the sum of all diamine - or all dicarboxylic acid residues. The polyamides of the invention have good mechanical properties and good solvent resistance, more particularly alcohol resistance, and are suitable for use in the production of mold bodies with permanent transparency. |
