Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


silicone emulsion

silicone emulsion

silicone emulsion

What can be done to keep dimethylpolysiloxane in a dispersed phase when using an emulsifying agent such hexane, xylene or hydrofluoroether azeotrope?  
We are currently investigating the use of these agents to coat syringe needles with the dimethylpolysiloxane.

Ronald G. Campbell
Quality Assurance Manager
Shinamerica, Inc.

RE: silicone emulsion

There are some proprietary products(surfactants) which can be used for stabilizing dimethylpolysiloxane. Most of them have patents. There are some commercial ones available.
Check this site out for some examples.


TRIM (r) TC 143 is a potential candidate.

Remember in an azeotropic system, the stability of the emulsion becomes a complex function of the azeotropic composition and solids composition. Usually for polysiloxanes you will have to use more than one stabilizer (surfactants) with different molecular weights and poly dispersities.

However since your application is for medical purposes, getting FDA approval for complex azeotropic systems might be a problem. But since you already have xylene and hexane as your components, the additional surfactants shouldn’t be a major issue. More over some proprietary emulsion stabilizers are proven biocompatible.
Hope this information helps.

Kiran Reddy

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close