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9108426 
Journal Article 
New antiozonants for rubber compounds based on oxyalkylated derivatives of 4-aminodiphenylamine 
Ushmarin, NF; Kavun, SM 
2017 
0 
International Polymer Science and Technology
ISSN: 0307-174X 
44 
11 
36-41 
English 
Two new p-phenylenediamine(PPD) antiozonants produced in Russia, 2PPD and 3PPD, were studied as replacements for the standard and imported 6PPD and IPPD (N-isopropyl-N'-phenyl PPD) for the production of mechanical rubber goods and tyres (in the sidewall, tread and other elements). The method proposed for producing the new antiozonants made it possible to organise their industrial production by low-cost technology, in contrast to 6PPD and IPPD production technology. The raw materials for the new antiozonants included ethylene and propylene glycols, available in Russia, and 4-aminodiphenylamine, imported for the production of antioxidant S789. Several advantages of 3PPD over imported stabilisers were established. These included a greater effectiveness in protecting rubber compounds against thermal oxidation and ozone cracking in comparison with the stabilisers it is replacing. The disadvantages of the new antiozonant, in terms of the form in which it is produced and its influence on the vulcanisation kinetics, are examined and ways of overcoming them are presented. © 2017 Smithers Information Ltd.