STABILIZED ELASTOMER COMPOSITION, STABILIZER, ELASTOMER STABILIZATION PROCESS, AND A METHOD FOR PREVENTING DECOLORATION OF SUBSTRATES Russian patent published in 2005 - IPC

FIELD: polymer materials.

SUBSTANCE: invention relates to compositions containing (i) elastomer sensitive to oxidative, thermal, dynamic, or light- and/or ozone-induced degradation and (ii), as stabilizer, at least one compound belonging to type of S-substituted 4-(3-mercaptosulfinyl-2-hydroxypropylamino)diphenylamine, as well as to a method for preventing decoloration of substrates coming into contact with elastomers and to a method for stabilizing elastomers consisting in introducing into the latter or coating them with at least one compound belonging to type of S-substituted 4-(3-mercaptosulfinyl-2-hydroxypropylamino)diphenylamine. Composition of stabilized elastomer comprises (a) natural-origin or synthetic elastomer sensitive to degradation as mentioned above and (b) stabilizer, in particular at least one compound having following general formula 1: [R-S(=O)_mCH₂-CH(OH)-CH₂]_n-N(R¹)_2-n-R² (1), where R represents C₄-C₂₀-alkyl, hydroxy-substituted C₄-C₂₀-alkyl, phenyl, benzyl, α-methylbenzyl, α,α-dimethykbenzyl, cyclohexyl, or -(CH₂)_qCOOR³, and, when m=0, R can be and, when n=1 and R⁴ is hydrogen, can also be R²-R¹N-CH₂-CH(OH)-CH₂-S(=O)_m(CH₂)_x- or R²-R¹N-CH₂-CH(OH)-CH₂-S(=O)_m-CH₂-CH₂-(O-CH₂-CH₂)_y-; R¹ represents hydrogen, cyclohexyl, or C₃-C₁₂-alkyl; R² represents group ; R³ C₁-C₁₈-alkyl; R⁴ hydrogen or CH₂-CH(OH)-CH₂-S(=O)_m-R; X C₁-C₈-alkyl; Y C₁-C₈-alkyl; m=0 or 1, n=1 or 2, q=1 or q=2-6, and y=1 or 2. Compounds of formula 1 stabilize elastomers, especially low-colored ones, prevent oxidative, thermal, dynamic, or light- and/or ozone-induced degradation thereof, and prevent decoloration of substrates coming into contact with elastomers.

EFFECT: enlarged assortment of elastomer-conditioning reagents.

16 cl, 3 tbl, 6 ex