STABILIZERS FOR CRUDE EMULSION RUBBERS, SYNTHETIC LATEX, AND NATURAL RUBBER LATEX Russian patent published in 2005 - IPC

FIELD: rubber industry.

SUBSTANCE: invention relates to compositions containing crude emulsion rubber, synthetic latex, or natural rubber latex subjected to oxidative, thermal, dynamic, and/or light-induced degradation. In particular, invention provides composition, containing (i) crude emulsion rubber, synthetic latex, or degraded natural rubber latex, (ii), as stabilizer, at least one compound of formula I: (I), wherein R¹ is C₉-C₂₀-alkyl, and (iii), as another stabilizer, at least one compound of formula II: (II), wherein R² is C₈-C₁₂-alkyl; R³ is hydrogen, C₈-C₁₂-alkyl, cyclohexyl, 1-methylcyclohexyl, benzyl, α-methylbenzyl, α,α-dimethylbenzyl, or -CH₂-S-R²; R⁴ is C₁-C₁₂-alkyl, benzyl, α-methylbenzyl, α,α-dimethylbenzyl, or -CH₂-S-R²; and R⁵ is hydrogen or methyl. Invention also describes a method of stabilizing indicated mixture of compounds I and II.

EFFECT: enhanced efficiency of stabilizer composition as compared to each of stabilizers used separately.

16 cl, 3 tbl, 3 ex