The oxidation of sealing liquids has been examined in order to select the best temperatures and times for dissolving macromolecular polyisobutylene P-200 in I-20A industrial oil. Conclusions are drawn on the desirability of maintaining a temperature in the reactor in the range 110-120°C for 5-6 h in the dissolution of the polyisobutylene. Temperatures above 120C, even acting briefly, lead to extensive decomposition of the macromolecular polyisobutylene.Sealing liquids AG-4 and AG-4I (TU 26-02-592-83) are intended for protecting deaerated water and hydrophilic liquids from evaporation and saturation with gases, and also for protecting equipment from corrosion.

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