FIELD: organic chemistry. SUBSTANCE: described are atmosphere-resistant polyamides and method of preparation thereof. Polymerization or polycondensation of polyamide-forming monomers C is carried out in the presence of 0.02-0.7 wt % of 4-amino- 2,2,6,6-tetraalkylpiperidine (II), 0-0.5 wt % of aliphatic or cycloaliphatic diamine (III) which has primary and tertiary amino group and 0.02-0.7 wt pf 2,6- dialkylphenol (IV) having functional OH group in position 4 of formula: 
wherein R1 and R2 are identical or different radicals having 1-6 carbon atoms; R3 is either hydrogen atom or methyl group; functional group A is essentially free carboxy group or primary amino group or C1-C4 esterified carboxy group, or primary amino group; X and Y in amino group are defined as (X=2/Y=1); (X=2/Y=0); (X=1/Y=0) and (X=0/Y=1), and X and Y in free or esterified carboxy group are further defined as O, and amounts of components I-IV are supplemented to 100 wt %, sum of components II, III and IV is equal to 0.05-1.3 wt %, and components, II, III and IV are attached with polymer chains by amide bonds. Also described are atmosphere-resistant polyamides prepared from lactams and ω-aminocarboxylic acids from above-mentioned components I, II, III and IV and 0.1-1.2 wt % of tri-tetra- or polycarboxylic acid V and also method of preparation thereof, and amounts of components I-V are supplemented to 100 wt %, sum of components II, III, IV and V is equal to 0.2-2.5 wt % and components II, III, IV and V are attached with polymer chains by amide bonds. EFFECT: polyamides retain impact viscosity properties for prolonged periods of time under atmospheric conditions. 15 cl, 7 ex, 4 tbl
