COMPOSITION INVOLVING ELASTOMER AND SULFUR-CONTAINING STABILIZING AGENT OF PHENOLIC TYPE Russian patent published in 1995 - IPC

FIELD: stabilization of elastomers. SUBSTANCE: composition has an elastomer and sulfur-containing stabilizing agent of phenolic type representing a combination of at least one phenol of empirical formula (R_cS)₂C₃N₃NHC₆H₂(OH)R_aR_b where R_a and R_b mean independently each of other C₁-C₄-alkyl, R_c-C₆-C₁₂-alkyl and at least one phenol of empirical formula R₁R₂R₂(OH)C₆H, [CH₂C₆H₂(OH)R₁]_nCH₂SR₃ where n = 0-3; R₁ and R₂ mean independently each of other C₁-C₁₂-alkyl or -CH₂SR₃, R₃-C₈-C₁₈-alkyl, phenyl or benzyl, and R₄ means hydrogen or methyl. Mass ratio of phenolic stabilizing agents is 1:1. Quantity of stabilizing mixture is 0.1-0.3% of elastomer mass. Combination of two stabilizing agents - alkylthiomethylphenols and sulfur-containing phenolic triazines - provides high stabilizing effect at thermooxidative ageing of elastomers for the long time. EFFECT: enhanced quality of composition. 12 cl, 6 tbl