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Low Refractive Index Fluoropolymer(HELP) for thin film coating

Low Refractive Index Fluoropolymer(HELP) for thin film coating

Low Refractive Index Fluoropolymer(HELP) for thin film coating

(OP)
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.

RE: Low Refractive Index Fluoropolymer(HELP) for thin film coating

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

RE: Low Refractive Index Fluoropolymer(HELP) for thin film coating

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

Regards

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