OLIGOMEROUS COMPOUNDS, COMPOSITION, METHOD OF STABILIZATION AND OLIGOMEROUS COMPOUNDS Russian patent published in 1999 - IPC

FIELD: organic chemistry, oligomers. SUBSTANCE: invention relates to oligomerous compounds of the formula (I) where L - a group (a) or (b) being oxygen atom in group L is bound with phosphorus atom in repeating structural fragment in each case and residue R₅ and carbon atom at position 4 of piperidine ring in group L are bound with oxygen atom in repeating structural fragment; R₁, R₂ - hydrogen atom, C_1-25-alkyl, C_2-24-alkenyl possibly substituted with C_1-4-alkyl, C_5-8-cycloalkyl, phenyl, C_5-8-cycloalkenyl, C_7-9-phenylalkyl or -CH₂-S-R₆; R₃ - H or methyl; R₄ - H, C_1-25-alkyl, C_2-24-alkenyl possibly substituted with C_1-4-alkyl, C_5-8-cycloalkyl, phenyl, C_5-8-cycloalkenyl, C_7-9-phenylalkyl or -CH₂-S-R₆, -(CH₂)_pCOOR₇ or -(CH)_qOR₈. Synthesized oligomerous compounds are effective stabilizing agents of organic materials that can be subjected for degradation induced by oxidative, thermic and/or light processes. EFFECT: improved method of stabilization, enhanced effectiveness of compounds. 19 cl, 4 tbl, 8 ex