Improvement of Production Technology of Frost-Resistant Butadiene-α-Methylstyrene Rubber SKMS-10RKP

Abstract

The research on increase of aggregative stability of SKMS-10RKP rubber latex, obtained by high-temperature polymerization method,
as well as on improvement of technology of its coagulation is carried out.

The aggregative stability of latex was assessed by the amount of coagulum released from latex during mechanical and thermomechanical impacts on it on the Maron-Ulevich device. The character of the change in the pH of the polymerization medium depending on the type of buffer used is determined. An increase in the aggregate stability of latex rubber SКMS-10 RКP was achieved by using a fractional supply of the aqueous phase as a buffer of trisodium phosphate during polymerization.

The improvement of the technology of coagulation of rubber SКMS-10 RКP from latex consisted in the use of low-salt and salt-free separation methods. Optimal dosages of the coagulating additive BP-40I and the synthetic coagulant «Flotek-17» were selected. It has been established that the use of low-salt and salt-free methods of coagulation during separation of rubber SКMS-10 RКP allows to reduce the consumption of sodium chloride at the stage of separation of rubber from latex, reduce the consumption of water used when washing the crumbs of the separated rubber, increase the values of rubber quality indicators and reduce pollution of freshwater reservoirs with sodium chloride.