Properties of polysulfide sealants of VITEF type

Results of determining the working life, tensile strength, elongation, and hardness as a function of the content of a vulcanization accelerator are reported. The following accelerators are studied: diphenylguanidine, phenyl-β-naphthylamine, and γ-aminopropyltriethoxysilane. Optimal ratios for each studied accelerator grade are established and its operating properties and hardness are determined. Results of testing of mechanical properties of polysulfide sealants with the use of new accelerators are shown. The reported results of experimental studies indicate that application of new vulcanization accelerators makes it possible to not only considerably increase the working life of sealants but also to control their mechanical properties in a required direction.