PYRIDAZINE DERIVATIVES AS ANTIFATIGUE AND ANTIOXIDANT AGENTS FOR SBR VULCANIZATES

Pyridazine derivatives such as 3,6-dianilino-pyridazine, 3-anilino-6-i sopropylamino-pyridazine, 3,6-di-beta-naphthylamino-pyridazine and 3-b eta-naphthylamino-6-isopropylamino-pyridazine were prepared. These com pounds were incorporated into SBR mixes. The rheometric characteristic s of the green rubber mixes were determined using the oscillating disc rheometer. It was found that 3-anilino-6-isopropylamino-pyridazine sl ightly increases the rate of vulcanization while 3,6-di-beta-naphthyla mino-pyridazine and 3-beta-naphthylamino-6-isopropylamino-pyridazine s lightly decrease it. The prepared compounds were evaluated as antifati gue and antioxidant agents in SBR vulcanizates. It was found from the obtained results that the investigated compounds are good antioxidant and antifatigue agents and their efficiency is comparable with that ob tained by 1,4-diphenyl phenylene diamine, which is used in the rubber industry.