Abstract: Thermoplastic molding compounds which have high cold impact strength. The molding compounds are comprised of (i) a polyamide 1012 with a relative viscosity in the range of 1.5-3.0; and (ii) a plasticizer in the amount 2-25 wt. % based on the weight of the polyamide. The inventive molding compounds enable manufacture of molded pieces.

Abstract: Polyamide plastic fuel lines which are dimensionally stable and resistant to fuels, alcoholic fuels and alcohols as fuels are prepared from aliphatic high molecular weight polyamides. The fuel lines are prepared by extruding a hot melt of the polyamide, sizing through a die having a diameter in excess of the given diameter of the fuel line, cooling the fuel line in a cooling bath, removing the fuel line from the bath and sizing the fuel line adiabatically through a disk having a diameter less than the given diameter.

Abstract: Polyamide plastic fuel lines which are dimensionally stable and resistant to fuels, alcoholic fuels and alcohols as fuels are prepared from aliphatic high molecular weight polyamides. The fuel lines are prepared by extruding a hot melt of the polyamide, sizing through a die having a diameter in excess of the given diameter of the fuel line, cooling the fuel line in a cooling bath, removing the fuel line from the bath and sizing the fuel line adiabatically through a disk having a diameter less than the given diameter.

Abstract: Shaped or unshaped synthetic resins having about 0.01-5% by weight of stabilizers where the stabilizers are bisamides of quadratic acids having the general formulas I and/or II as follows: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4, are identical or different, and represent(A) hydrogen, unsubstituted or substituted alkyl or alkenyl residues of 1-22 carbon atoms, one or more of which can also be substituted by hetero atoms;(B) unsubstituted or substituted cycloalkyl or cycloalkylalkylene residues;(C) unsubstituted or substituted aryl and arylalkylene residues;(D) 3- to 8-membered, unsubstituted or substituted rings which contain one or more hetero atoms and which can optionally be connected to the nitrogen atoms of Formulae I and II by way of alkylene groups;(E) furthermore the groups --NR.sub.1 R.sub.2 and/or --NR.sub.3 R.sub.4 represent 3- to 8-membered, unsubstituted or substituted rings which optionally contain additional hetero atoms; and(F) respectively R.sub.1 and R.sub.3 or R.sub.2 and R.