Pyrathane vs. Petroleum Products: How Does It React to Creosote?

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Discussion Overview

The discussion centers around the chemical compatibility of Pyrathane, a trade name for a type of polyurethane, with creosote, a substance derived from coal or wood. Participants explore the potential effects of creosote on Pyrathane and seek information on suitable alternatives for applications involving petroleum products.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the chemical resistance of Pyrathane to creosote and whether it will degrade over time.
  • Another participant notes the absence of a chemical compatibility listing and suggests contacting the manufacturer for more information.
  • A reference from a chemical resistance guide indicates that polyurethane, similar to Pyrathane, may be attacked by creosote and advises against its use, recommending alternatives like Nitrile, Fluorocarbon, and Fluorosilicone.
  • One participant mentions conflicting information from various sources and clarifies that Pyrathane is likely a type of polyurethane produced by Pyramid, pending confirmation from the manufacturer.
  • A different reference rates the effect of creosote on Pyrathane as "minor to moderate" and also recommends Fluorosilicone as an alternative.
  • Participants discuss the nature of creosote, noting its origins from coal or wood and questioning its similarity to kerosene.
  • One participant suggests that creosote may be a byproduct of combustion, prompting clarification about its presence in chimneys where wood is burned.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the compatibility of Pyrathane with creosote, with some references suggesting potential degradation while others provide conflicting assessments. The discussion remains unresolved as participants await further information from the manufacturer.

Contextual Notes

There are limitations regarding the definitions of Pyrathane and creosote, as well as the varying interpretations of their chemical interactions. The discussion reflects a lack of consensus on the degree of effect creosote may have on Pyrathane.

Averagesupernova
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Does anyone here know how Pyrathane stands up to petroleum products? Specifically, how does it react to creosote? Will creosote eventually break it down?
 
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After doing a quick search, I didn't see any kind of a chemical compatability listing anywhere. You'll probably have to give the manufacturer a call.
 
I have "Chemical Resistance Guide for Elastomers II" on my desk, and it says polyurethane (which I'm assuming is very close to Pyrathane) will be attacked to some degree by creosote and shouldn't be used. The book recommends Nitrile, Fluorocarbon, and Fluorosilicone.
 
Thanks Q. I'm getting some conflicting stories from other sources. If anyone else has any information on this feel free to come forward. As far as I can tell, pyrathane is a trade name for polyurethane or something very close to it manufactured by the company Pyramid. I have not heard back directly from Pyramid yet.
 
I have another reference, this one from "Minor Rubber Company". They rate it as "minor to moderate effect" and they also recommend Fluorosilicone. They rate nitrile as minor to moderate effect also.
 
Ok thanks again Q. Still waiting to hear from Pyramid. I did some searching last night on-line and came up with the same results as Fred.
 
We use fluorosilicone for our standard applications around jet fuels.
 
Ok Fred. Thanks. Creosote is a coal or wood product so I'm not sure how similar it would be with what is basically kerosene.
 
I always thought that creosote could be a by product of combustion. I must be thinking of something else...
 
  • #10
Creosote IS found in chimneys specifically where wood is burned. Do a little more googling and you'll find out how.
 

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