Solvent for PVC

[NeilLup]

We are looking for a solvent for PVC which

1) Readily dissolves PVC
2) Does not react with isocyanates (contains no active hydrogens)
3) Does not dissolve in isocyanates or have isocyanates dissolve in them
4) Is economical enough to use in a reasonable industrial process
5) Is not insanely toxic

Any suggestions?

Neil Lupton
Gel Sciences Inc.
Neil Lupton

[Phil Hargreaves]

I'm not sure about the reactivity with isocyanates but common solvents
for PVC are:

Acetone
MEK
tetrahydrofuran
cyclohexanone
dichloromethane

Hope this helps
Phil
--
Phil Hargreaves Tel. UK (0694) 724333
Polymer Laboratories Ltd. fax UK (0694) 723994
Church Stretton, Shropshire, UK email Ph...@polymer.demon.co.uk

[Antoni S. Gozdz 21621]

In article <3rusek$5...@newsbf02.news.aol.com> nei...@aol.com (NeilLup) writes:
>We are looking for a solvent for PVC which
>
>1) Readily dissolves PVC
>2) Does not react with isocyanates (contains no active hydrogens)
>3) Does not dissolve in isocyanates or have isocyanates dissolve in them

With condition #3, I bet my NJ tomato farm ;-) you won't find it.

[NeilLup]

Thanks, Phil.

Unfortunately, we have observed that acetone and MEK react with
isocyanates through water generated by the aldol condensation and THF
dissolves in isocyanate and has isocyanate dissolve in it. I suspect
cyclohexanone also would generate water through aldol condensation.
Dichloromethane (methylene chloride) likely would dissolve isocyanate and
have isocyanate dissolve in it.

I do appreciate your suggestions.
Neil Lupton

[NeilLup]

Up to now, Tony, your tomatoes are safe.
Neil Lupton