LIQUID ANTIOXIDANT COMPOSITION FOR RAW RUBBERS Russian patent published in 2021 - IPC C08L91/00 C08K5/134 C08J3/20 C08F6/00 C09K15/00 

FIELD: chemistry.

SUBSTANCE: invention relates to an antioxidant composition used for raw rubbers. The liquid antioxidant composition used for raw rubbers contains between 5 and 30 wt.% of at least one aromatic amine-based antioxidant agent, between 20 and 70 wt.% of at least one hindered phenol-based antioxidant agent, between 0 and 40 wt.% of at least one phosphite-based antioxidant agent; and between 20 and 40 wt.% of at least one solvent with a boiling point above 185°C and a freezing point below -10°C at 101.325 kPa, wherein the percentage by weight of component a), b), c) or d ) is based on the total weight of the antioxidant composition wherein the mixture of components a), b) and c) is liquid at 25°C at 101.325 kPa.

EFFECT: invention allows using the described liquid antioxidant composition in raw rubbers, such as natural rubber, and raw rubbers synthesized by polymerization in a solution, wherein the composition is stable during the "drying" process of rubber resins synthesized by polymerization in a solution, does not stain, and is suitable for a wide temperature range, as well as quite antioxidant.

11 cl, 2 tbl