Low Refractive Index Fluoropolymer(HELP) for thin film coating

[honda1997]

I'm searching for candidate polymers that possess very low refractive index (~1.3 - 1.35) in the visible portion of the spectrum. Polymers/Ionomers that could be dissolved in solvents to get even relatively thin, coatings preferred. Polymer material is expected to act as an encapsulant. "Transparency" is pretty critical as well. I would really appreciate your inputs/feedback.

 

[Demon3]

In the past I managed to find a site that had a list of fluoro monomers by refractive index to give what you are looking for. They were sold as coatings for fiber optic cables. I can't find it with a quick Google search.

For now I would suggest you look at these places that list specialty monomers and polymers:

http://www.polysciences.com/shop/

http://www.scientificpolymer.com/index.asp

http://www.monomerpolymer.com/

http://www.polymersource.com/

Searching Google for "fluoropolymer refractive index 1.3" gave some good hits including:

http://www2.dupont.com/Teflon_Industrial/en_US/assets/downloads/k15778.pdf

You could plasma polymerise a very thin coating of fluoropolymer onto your substrate for example using the atmosperic plasma technique of Dow Corning as seen here:

http://www2.dupont.com/Teflon_Industrial/en_US/assets/downloads/k15778.pdf

I know they can do 30nm thick coatings of fluoroacrylates.


There is not any memory with less satisfaction than the memory of some temptation we resisted.
- James Branch Cabell

 

[patprimmer]

Also, Allied Signal did a lot of fluoro polymers. I think Allied are now Honeywell or BASF

Regards

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