No abstract

No abstract

To raise the quality of butadiene-acrylonitrile rubbers (BNK), and also to solve ecological problems associated with the production of rubbers of this type, new methods and technologies have recently been proposed for their synthesis. The new-generation butadiene-acrylonitrile rubbers include rubbers under the tradename Nitrilast (ref. 1), the production of which by original technology has been started by the Voronezhsintezkauchuk Open Joint Stock Company. It must be pointed out that the new-generation BNK (BNKS, Nitrilast) differ considerably in properties from type SKN butadiene-acrylonitrile rubbers. For use instead of the 'old' grades of rubber in the production of oil-and petrol-resistant mechanical rubber goods (MRGs) it is necessary to develop new promising rubbers, to improve and correct over 300 standard rubber formulations, to optimise the technology for their production, to revise industry-wide documents, and to carry out service tests on the MRGs. Users of BNK are already familiar with this work from replacing sulphonate rubbers of the SKN type with paraffinate BNKS rubbers (refs. 2-4). Practically analogous work will have to be carried out for the introduction of Nitrilast rubbers. With the appearance of the new-generation BNK on the market, the MRG industry can improve the range of promising rubbers for the production of oil-and petrol-resistant articles.

No abstract