Highly purified natural rubber. I. Preparation of anionic latex and its physical properties.

Abstract

Highly deproteinized natural rubber (HDPNR) latex was prepared by incubation of natural rubber latex with proteolytic enzyme and anionic surfactant (s). The nitrogen content of HDPNR was less than 0.02%. Green strength of HDPNR from high-ammonia latex (HA-latex) was the same as that of HA-latex. HDPNR had a good processability for a coagulant dipping process. The sulfur cured film from HDPNR showed a similar tensile strength, lower modulus, lower permanent set and lower water absorption, compared with that from HA-latex.