Heat Sensitivity of Latex Compound

Manufacturer: We have been having difficulty in controlling the heat sensitivity of our NR latex compounds resulting in variation in product thickness, etc. We are now in the process of developing new compounds with improved heat stability.

We would appreciate it very much if you could suggest a simple lab method for us to measure the latex heat sensitivity.

John Woon (Senior Latex Consultant): You can evaluate the heat sensitivity of
your latex compounds by measuring the increase in viscosity when the latex compound is subjected to an extended period in an oven at, say, 35 to 40°C at a given latex TSC and pH. The temperature used would depend on the latex compound formulation.



Other tests we could carry out include MST and coagulum content (including micro-coagulum).