Nitrile/Buna-N(O Rings) vs Petroleum Jelly(Vaseline)?

Well I found out that my silicone lubrcant in a can contains acetone, and that stuff will pretty much melt O-Rings, anyone had experance with "white petroleum jelly" with Nitrile O-Rings?

Re: Nitrile/Buna-A(O Rings) vs Petroleum Jelly(Vaseline)?

BUNA-N is listed as "highly resistant" to petroleum products, not including solvents.

Re: Nitrile/Buna-A(O Rings) vs Petroleum Jelly(Vaseline)?

Navck said:

Well I found out that my silicone lubrcant in a can contains acetone, and that stuff will pretty much melt O-Rings...

Click to expand...

What's the brand name? Does it list acetone on the label or did you find out some other way?

Re: Nitrile/Buna-A(O Rings) vs Petroleum Jelly(Vaseline)?

Pyroil is the brand name (Subsidary of Valvoline)
Its listed as a multi-purpose silicone lubricant
Contains - Heptane (142-82-5), Acetone (67-64-1), Polydimethylsiloxane (63148-62-9), Carbon Dioxide (124-38-9)

Can I use WD-40 as well, or does it contain some nasty universal synthetic rubber killing chemical?

Re: Nitrile/Buna-A(O Rings) vs Petroleum Jelly(Vaseline)?

Thanks.

My undestanding is that buna is more tolerant of petrolium based chemicals.

Agree with SubUmbra - nitrile is good with heptane (petroleum based products). Usually the EPDM is what is killed by petroleum based lubricants (like WD-40). My EPDM Oring on the Nuwai died quickly under these conditions.
Sam

Vaseline will be fine. We use a petroleum jelly product for nitrile/buna o-rings in the aircraft industry.

When in doubt, always good to look for a Materials Safety Data Sheet (MSDS) for a product. It will give safe handling, use, and storage info. plus a listing of the components/ingedients.

bh, you work for Aloha Airlines by any chance? :ironic:
%100 silicone is available, and Inova recommends it, so I use it.

..um..what do you chemist types think about 'Superlube' (the brand name) ?

Not to hijack the thread, but the question on Superlube is not really a chemical question. I think you are asking whether it works well and that is an application where someone would need to test. If you are asking if Superlube is compatible with nitrile/BunaN, then the ingredients would need to be determined. If the ingredients are petroleum based, it should be fine with BunaN.

Sam

exhaustive ingredients listings of materials here:

http://hazard.com/msds/mf/perm/files/20029.TXT

n-HEPTANE 142-82-5 60-65
Synthetic hydrocarbon,
poly(alpha-olefin) based 68649-12-7 30-35
CARBON DIOXIDE 124-38-9 3-5
Modified silicon dioxide 68611-44-9 3-5
Poly(tetrafluoroethylene) 9002-84-0 1-3


Ingredients which have exposure limits

Exposure Limits (TWA) ACGIH OSHA OTHER
Ingredients (TLV) (PEL)

n-HEPTANE 400 ppm TWA 500 ppm TWA None
1640 mg/M3 1600 mg/M3
Synthetic hydrocarbon,
poly(alpha-olefin) based 5 mg/m3 mist 5 mg/m3 mist None
CARBON DIOXIDE 5,000 ppm TWA 10,000 ppm TWA None
9,000 mg/M3 18,000 mg/M3
Modified silicon dioxide 10 mg/m3 6 mg/m3 6 mg/m3

Exposure Limits (STEL) ACGIH OSHA
Ingredients (TLV) (PEL)

n-HEPTANE 500 ppm 500 ppm
2050 mg/M3 2000 mg/M3
Synthetic hydrocarbon,
poly(alpha-olefin) based 10 mg/m3 None
CARBON DIOXIDE 30,000 ppm 30,000 ppm
54,000 mg/M3 54,000 mg/M3

.