Polyamide molding compound and its use for producing transparent, hot-steam-sterilizable molded parts and extrudates

Abstract

The invention relates to a polyamide molding material or copolyamide molding material and the use of such a polyamide molding material or copolyamide molding material for producing steam-sterilizable transparent moldings and extrudates. This polyamide molding material is characterized in that it comprises at least one copolyamide formed from 35-42 mol % of bis(4-amino-3-methylcyclohexyl)methane (MACM), 35-42 mol % of isophthalic acid (IPS) and 16-30 mol % of laurolactam (LC12). MACM may be replaced up to 50% by bis(4-aminocyclohexyl)-methane (PACM) and IPA up to 50% by terephthalic acid (TPA). The polyamide molding material may also be a blend of copolyamides or a blend of copolyamides with polyamide 12. The relative viscosity (RV) of the polyamide molding material or copolyamide molding material is in any case adjusted to a value which is greater than 1.45. Steam-sterilizable and transparent standard specimens which are produced from such polyamide molding materials or copolyamide molding materials and whose composition corresponds to the transparent moldings and extrudates have a tensile strain at break which, after undergoing at least 140 and especially preferably at least 350 steam sterilization cycles, is above the stretching limit.

Dependencies are inferred from the claim text.