RUBBER COMPOSITION AND METHOD OF ITS PRODUCTION Russian patent published in 2019 - IPC C08J11/04 C08J11/18 C08L21/00 

FIELD: technological processes.

SUBSTANCE: invention relates to composition and technology of recycling rubber crumbs from rubber of general purpose and can be used in tire, rubber industry and for production of caoutchouc bituminous paste. Rubber composition contains, wt%: rubber chips 35–45 and solution containing solvent 45–53, modifying additive 3–4 and catalyst 7–8. Solvent used can be turpentine or a mixture of turpentine with a solvent, and catalyst can be used salts of cobalt, manganese, zirconium, calcium. Modifying additive contains, wt%: vegetable oil 72–75, monoethanolamine 7–10, citric acid 13–16, triethanolamine 1–2 and chalk 0.1–0.2. Sunflower oil may be used as vegetable oil. Rubber composition production method involves mixing rubber crumbs and a solution containing a solvent, a modifying additive and a catalyst, holding at 20–25 °C for 24 hours, squeezing crumbs of solution, then rubber crumbs are left at room temperature in a layer with thickness of not more than 10 cm and held for 12–48 hours. To press the solution out of rubber crumbs, presses are used.

EFFECT: invention simplifies the regeneration process, reduces energy consumption during grinding and processing, improves uniformity of the regenerate and reduces metal consumption of the equipment.

7 cl, 2 dwg, 1 ex