METHOD FOR PREPARING OF RUBBER MIXTURE Russian patent published in 1995 - IPC

FIELD: production articles of industrial rubber. SUBSTANCE: carbon-chain rubber, filler, modifying agent and desired additive are used to prepare rubber mixture. Derivatives of methacryl series, namely methacryl acid, methacrylate of ethylene glycol, methacrylate of higher alcohols of C₇-C₁₈ fraction, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethacrylate of triethylene glycol, trimethacrylate of triethanol amine and their mixture are used as said modifying agent. Said modifying agent is used in gaseous state at 50-150 C. Filler is treated by modifying agent within 10-60 s, the process is carried out before mixing components takes place. Expense of said filler and modifying agent are 30-300 mass parts and 0.5-15.0 mass parts per 100 mass parts of rubber respectively. Rolled mixture is then formed and vulcanization thus manufactured article is carried out. Relative strength of desired articles is 3.8-22.9 MPa, their relative elongation is 98-756 residual elongation is 6-68 its resistance at multiple bending is from 6.7 to more than 500 kilocycles, said resistance after ageing within 48 h being 0.51-242 kilocycles. EFFECT: improves efficiency of the method. 2 cl, 3 tbl