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Abstract

The invention is relative to weather-resistant polyamides and to methods of their production in which the polymerization or polycondensation of the polyamide-forming monomers (I) is carried out in the presence of 0.02 to 0.7% by weight 4-amino-2,2,6,6-tetraalkylpiperdine (II), 0 to 0.5% by weight of an aliphatic or cycloaliphatic diamine (III) carrying a primary and a tertiary amino group and 0.02 to 0.7% by weight of a 2,6-dialkylphenol (IV) functionalized in 4-position to the OH group and with the formula ##STR1## in which R.sup.1 and R.sup.2 are the same or different alkyl groups with 1 to 6 C atoms, R.sup.3 is either a hydrogen atom or a methyl group, functional group A represents either a free carboxyl group or a carboxyl group esterified with C.sub.1 -C.sub.4 alcohols or represents a primary amino group, in the case of the amino group the value combinations (x=2/y=1); (x=2/y=0); (x=1/y=0) and (x=0/y=1) are possible for x and y and in the case of the free or esterified carboxyl group x and y can additionally each be 0, and in which the amounts of components I to IV supplement each other to 100% by weight, the sum of components II, III and IV is 0.05 -1.3% by weight and components II, III and IV are bound via amide bonds to the polymer chains. The invention is furthermore relative to weather-resistant polyamides accessible from lactams, .omega.-amino carboxylic acids and consisting of the previously cited components I, II, III, optionally IV and 0.1 to 1.2% by weight of a tri-, tetra- or polycarboxylic acid V as well as to a method of their production in which the amounts of components I to V supplement each other to 100% by weight, the sum of components II, III, IV and V is 0.2-2.5 % by weight and components II, III, IV and V are bound via amide bonds to the polymer chains.

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First Claim