Material of the CV Boots nitryle or chloroplene

[GrzegorzD]

I wonder why in car industries material for CV Boots was changed from nitryle to chloroprene rubber. Would you like to give me the answer?
Thanks in advance
Gregor

 

[GrahamBennett]

I can't help with this one really. I suppose it's down to cost and low temperature performance. I've seen CV boots made from NBR, CR, SBR and EPDM in recent times, especially for the automotive replacement markets.

 

[GrzegorzD]

GrahamBennett, thanks for the answer.
You are absolutely right with the low temp performance - I've just checked it in the table. But I am curious if it is the only (together with the cost) parameter which allow using CR instead of nitryle rubber.

 

[GrahamBennett]

According to my information CR has far better flame resistance - it is self-extinguishing. Other than that and the low temp performance there seems to be little to choose between them.