A derivative of sym-triazine (HTT) was chosen as a new nonammonia preservative for concentrated natural rubber latex
(CNRL) in place of NH3–TT/zinc oxide (ZnO). The preservation effects of the HTT for CNRL, drying characteristics, mechanical
properties, and cytotoxicity of the vulcanized natural rubber (NR) film were investigated. The results show that the CNRL was preserved
steadily for more than 6 months with 0.3% HTT, and the volatile fatty acid number, viscosity, and mechanical stability of
CNRL all met the requirements of ISO 2004:2010(E). The drying characteristics of the vulcanized NR film preserved by HTT retained
no change compared with those of the film preserved by NH3–TT/ZnO. The tensile strength and elongation at break of the vulcanized
NR film preserved by HTT were 32.17 MPa and 853.80%, respectively; these were very similar to those of the film preserved by
NH3–TT/ZnO, whereas the tear strength reached 68.43 kN/m, and this was much higher than that by NH3–TT/ZnO. The results of
the cytotoxicity and dermal irritation tests prove that HTT is not especially harmful to humans. VC 2014 Wiley Periodicals, Inc. J. Appl.
Polym. Sci. 2015, 132, 4174