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Science Forum Index » Materials Forum » question on polyurethane foams
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| nuaa215 |
 Posted: Wed Aug 27, 2003 10:13 pm |
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Guest
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Hi everyone,
I am new in this field. I was wondering if anyone can give me an example of
the detailed composition of the foam? e.g. what is used as blowing agent and
catalyst? Thank you. any tips or suggestions will be appreciated.
nuaa |
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| Frank Logullo |
| Posted: Thu Aug 28, 2003 5:31 am |
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Guest
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"nuaa215" <nuaa215@hotmail.com> wrote in message
news:bijvgp$11i$1@usc.edu...
Quote: Hi everyone,
I am new in this field. I was wondering if anyone can give me an example
of
the detailed composition of the foam? e.g. what is used as blowing agent
and
catalyst? Thank you. any tips or suggestions will be appreciated.
Polyisocyanates react with water to release CO2 which functions as blowing
agent. Amine formed reacts with other isocyanate to form a urea link in
polymer. I'm sure a Google search will give you details and chemical
structures.
Frank |
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| nuaa215 |
| Posted: Thu Aug 28, 2003 6:45 pm |
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Guest
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Hi Frank,
Thank you very much for your suggestions. Actually I have used google to
search for information on this product, but the information is way too much
for me to process. I think it might be common problems for new users of
internet search engines. :)
nuaa
"Frank Logullo" <frankPERIODlogullo@dol.net> 写入消息新闻
:FKl3b.877$qJ6.642521@monger.newsread.com...
Quote:
"nuaa215" <nuaa215@hotmail.com> wrote in message
news:bijvgp$11i$1@usc.edu...
Hi everyone,
I am new in this field. I was wondering if anyone can give me an example
of
the detailed composition of the foam? e.g. what is used as blowing agent
and
catalyst? Thank you. any tips or suggestions will be appreciated.
Polyisocyanates react with water to release CO2 which functions as blowing
agent. Amine formed reacts with other isocyanate to form a urea link in
polymer. I'm sure a Google search will give you details and chemical
structures.
Frank
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| jitney |
| Posted: Fri Aug 29, 2003 8:30 am |
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Guest
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Polyisocyanates react with water to release CO2 which functions as
blowing
agent. Amine formed reacts with other isocyanate to form a urea link
in
polymer. I'm sure a Google search will give you details and chemical
structures.
Frank
-In addition, some compounders will add "blowing agents" such as a
hydrocarbon like pentane. When the mixed product exotherms, it turns
the blowing agent to a gas and this augments the water blowing earlier
described.-Jitney |
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| Frank Logullo |
| Posted: Fri Aug 29, 2003 12:11 pm |
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Guest
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"nuaa215" <nuaa215@hotmail.com> wrote in message news:<bim7mq$2js$1@usc.edu>...
Quote: Hi Frank,
Thank you very much for your suggestions. Actually I have used google to
search for information on this product, but the information is way too much
for me to process. I think it might be common problems for new users of
internet search engines. :)
A simple Google search using: isocyante blowing agent chemistry gave
this as first hit: http://www.huntsman.com/pu/ShowPage.cfm?PageID=85
If you want a detailed chemical picture you should emphasise
chemistry.
Frank |
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| nuaa215 |
| Posted: Sat Aug 30, 2003 12:50 am |
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Guest
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very helpful indeed.
Thanks
William
"Frank Logullo" <frank.logullo@dol.net>
??????:afeaa072.0308291011.47d3f275@posting.google.com...
Quote: "nuaa215" <nuaa215@hotmail.com> wrote in message
news:<bim7mq$2js$1@usc.edu>...
Hi Frank,
Thank you very much for your suggestions. Actually I have used google to
search for information on this product, but the information is way too
much
for me to process. I think it might be common problems for new users of
internet search engines. :)
A simple Google search using: isocyante blowing agent chemistry gave
this as first hit: http://www.huntsman.com/pu/ShowPage.cfm?PageID=85
If you want a detailed chemical picture you should emphasise
chemistry.
Frank |
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| Back to top |
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