| 
  • If you are citizen of an European Union member nation, you may not use this service unless you are at least 16 years old.

  • You already know Dokkio is an AI-powered assistant to organize & manage your digital files & messages. Very soon, Dokkio will support Outlook as well as One Drive. Check it out today!

View
 

How to make the emulsion

This version was saved 15 years, 3 months ago View current version     Page history
Saved by Nancie Ravenel
on March 8, 2009 at 11:13:07 am
 

According to the information sheet from Noveon, you can add up to 60-80% by weight solvent into an aqueous gel prepared with Pemulen TR2 at a pH range of 4-5.

 

Typically we've found that the gel needs to have a pH of 7.5-8 to effectively remove oily grime from a surface, and we haven't tried to add more than 20% solvent to a gel to create an emulsion. 

 

Solvent is added to the prepared gel in a screw top jar.  The lid is screwed on tightly and the jar is shaken by hand until a milky emulsion is formed and all of the solvent is incorperated.

 

Stable emulsions have been made by adding 20mL. or less benzyl alcohol to an aqueous gel prepared wtih Pemulen TR2 at pH 7.5-8.

 

Stable emulsions have been made by adding 20 mL. petroleum benzine to an aqueous gel prepared wtih Pemulen TR2 at a pH 7-8.5.

 

The emulsions made at Shelburne have appeared to be stable over the course of time, for periods up to a month.  However, in practice, some of the solvent seems to sink down towards the bottom of the jar overnight. We shake jars of emulsion to redistribute solvent prior to decanting out small amounts to use for cleaning.

Comments (0)

You don't have permission to comment on this page.