THERMOPLASTIC RUBBER MANUFACTURING PROCESS Russian patent published in 2007 - IPC C08J3/20 C08L23/12 C08L21/00 

FIELD: rubber industry.

SUBSTANCE: invention provides process for manufacturing thermoplastic rubbers, which could be used in fabrication of hoses, washers, bushings, and other general mechanical rubber goods operated in contact with petroleum products. Process comprises three-step mixing. In the first step, 25-45% filler concentrate in crystalline polyolefin is prepared, which is then diluted with elastomer to filler concentration 20-40% and crystalline polyolefin/elastomer ratio between 0.8 and 4.5. Finally, curing agents for elastomer and supplementary amounts of crystalline polyolefin and elastomer are added to achieve concentrations of filler 2.5-19% and elastomer 25-75%. Filler utilized in the process has dielectric permittivity not lower than 6.

EFFECT: increased oil and deformation resistance.

1 tbl, 8 ex