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thcmeds (Materials) (OP)
13 Nov 04 15:23


   Does butane dissolve PVC?  If so, what kind of plastic do they use for the storage tank in a disposable lighter?  Do any plastics have a high resistance to butane?  Also what are the common constituents of butane sold as lighter fluid and what is the difference with more expensive/filtered brands?  I am interested in this for medical reasons, glad to hear
Helpful Member!  phex (Chemical)
14 Nov 04 1:08
according to this chart, it has a good resistance (will not be effected by butane)

http://www.omega.com/pdf/tubing/technical_section/chemical_chart_2.asp

hth,
chris
khan101 (Petroleum)
15 Nov 04 10:29
I hardly doubt that. Most of the cheap versions of butane lighters (for smokers) are made of PVC and plastics. Isn't it?
Helpful Member!  jte (Mechanical)
15 Nov 04 13:27
thcmeds-

I agree that butane lighters are made from plastics, but check a few more sources for PVC. I'd recommend the Harrington Plastics site at http://www.harringtonplastics.com/ChemSearch.cfm which indicates that PVC is unsuitable for butane service.

jt
dkf (Mechanical)
17 Nov 04 12:15
thcmeds
Butane lighters contain mixtures of n-butane, iso-butane and a fraction of propane to adjust vapour pressure of the mixture. Believe if there are other components, they are present only as impurities and in the ppm level. I´ve seen lighter vessels being made of nylons and acetals, a decade ago. I do not have updated info but doubt lighter components being made out of PVC.

dkf


  
jsummerfield (Electrical)
19 Nov 04 16:25
I doubt that the lighter is PVC.  Low pressure natural gas is sometimes gathered in PVC piping.

John

thcmeds (Materials) (OP)
19 Nov 04 22:40
thanks everyone for the great leads, I'd tend to believe the second link - that butane is unsuitable for use w/PVC.  There are also mercaptans in typical butane right?
Helpful Member!  epoisses (Chemical)
23 Nov 04 8:42
Depends what butane; the butane used for lighters and other small-scale use is normally hydrotreated very severely, mainly because of use for deodorants.
naks (Computer)
7 Dec 04 0:16
Corrosion/reaction appears to depend on the type of PVC, actually.  Found info originally at http://www.harvel.com/downloads/chemical-resistance.pdf (butane is kind of cut off at the bottom of one page, but you can make out an 'R') for recommended, or acceptable, exposure of PVC Type 1 to butane.  Checked some other sites and Type 1 PVC seems to be an industry standard and resistant to many corrosive materials.

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