Resting of rubber bases before acceleration finals (two cycle mixing)
Resting of rubber bases before acceleration finals (two cycle mixing)
(OP)
Greettings!
Even being a possible simple question to anwser, I always retain the question as to why, in some cases of course, should a rubber base or master rest before adding the acceleration. The main answser usually is for stabilization. But, for a carbon back, RAE oil, antioxidant and antiozonant, C9 resin and a dispertion agent filled rubber base of lets say NR, SBR and BR mix, after the 1st mixing cycle, where is the need for stabilization and what does it actually affects?
Thanks.
Even being a possible simple question to anwser, I always retain the question as to why, in some cases of course, should a rubber base or master rest before adding the acceleration. The main answser usually is for stabilization. But, for a carbon back, RAE oil, antioxidant and antiozonant, C9 resin and a dispertion agent filled rubber base of lets say NR, SBR and BR mix, after the 1st mixing cycle, where is the need for stabilization and what does it actually affects?
Thanks.





RE: Resting of rubber bases before acceleration finals (two cycle mixing)
RE: Resting of rubber bases before acceleration finals (two cycle mixing)
Nevertheless, I'm placing a disclamer, because sometimes clients have that "placebo effect", and complain heaven and earth about rubber problems just because the compound is a little different in colour, but can receive worst rubber with the colour that they are used to, and the product is alright again! In short, the client is not always the best way to find out true problems, if they truly exist.
Indeed that several testings ask for specific conditions to test the rubber, and the usual ones always state that the rubber should be at room temperature (or specified in the norm, but usually around 20ºC to 25ºC with a +/-2ºC). But that makes sence, because if you place, for instances, a not "rested" rubber to test rheometry, well the curve will be strange, different. You might not detect ts2, torques will be off, and so on. But the problem that I state (or situation if you will), supposably there were differences in the final rubber compound, that I cannot figure out as to why.
Thanks for the help. Neveetheless, if there are other explanations, go for it.