Diffrence between polyurethane and urethane?

[steel1212]

I got my new mustangs and fords mag and they had some suspension ideas in it. It said rubber was soft, then you had polyurethane that has SOME give and then urethane which is stiff?

I got to looking in my NPD catalog and they have 2 diffrent kits, one for poly and the other is prothane's urethane kit.

 

[68rustang]

I always thought they were the same thing:

http://www.aragonelastomers.com/faq.htm#question2

http://www.google.com/search?hl=en&...between+polyurethane+and+urethane&btnG=Search

 

[mdjay]

You have just urethane and graphite impregnated urethane (ie poly, polygraphite etc).

 

[steel1212]

Jay, so the prothane stuff is just plane urethane that I need to grease and the poly stuff has graphite in it to make it less noisy?

 

[68rustang]

No, Urethane and polyurethane are the same thing. It needs to be greased. Polygraphite is graphite impregnated polyurethane and should not need to be greased.

 

[mdjay]

Polygraphite is a trademarked buzz word that PST made up and patented. There are other brands with graphite impregated urethane. You still have to grease it upon initial installation.
http://tess2.uspto.gov/bin/gate.exe?f=doc&state=nju3nq.2.1

Prothane "black" does have graphite impregnated urethane. The "red" line does not have graphite. You must specify upon ordering.

Poly means plastic. So rustang, you are correct on the initial part of your statement. However in the industry it is generally referred to as the one with the graphite, but not always. So ask!

 

[68rustang]

Poly means plastic.

I always thought poly meant many, or multiple?

 

[mdjay]

Ok, in reference to the plastic The come in many different types of hardnesses.