Teflon is absolutely not PTFE. Teflon is a trademarked brand owned by Dupont with a brand promise that stands for performance, protection, and convenience...
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Teflon is absolutely not PTFE. Teflon is a trademarked brand owned by Dupont with a brand promise that stands for performance, protection, and convenience...
My statement stems from years of experience in the development of fluorinated protective coatings including the types of fluorosilanes used for the protection of premium ophthalmic lenses with AR...
4a) Sacrifice both perfornance and durability
This structure is polydimethylsiloxane also known as silicone. Premium easy clean topcoats are not derived from this chemistry rather they are fluorinated silanes that are either dipcoated or vapor...
Most lens manufacturers use standard or proprietary test methods for developing new technologies and quite frankly don't need an outside laboratory for this purpose. However, independent labs such...
Chris, I applaud your success and the passion for your products. I also enjoy the discussion.
Not working for either Lenscrafters or Essilor I can't say if they are the same. However, looking purely at performance the easy clean coatings on both Scotchgard and Alize are very comparable.
No apologies necessary. And, I have no doubt that the concept of easy clean coatings for ophthalmic lenses was conceived some time ago. So, no proof is needed. However, the current premium easy...
I wouldn't call myself a corporation knight and I don't represent Essilor. However, you are incorrect in some of your statements. The Essilor Crizal brand represents a coating system consisting of...
Not sure how this link is relative to this thread. PFOA, perfluorooctanoic acid, is a fluorosurfactant used as an emulsifier during the polymerization of PTFE. Youngblood's group in Purdue are...
This is a great thread so I'm going to through in my 2 cents. I think many are confusing performance and quality. For example, I don't think anyone would argue that a Ferrari is a higher performing...
Larry, if you are looking to 'invent' new materials, seeking input in an open forum is probably not the best idea. There are others who read this forum who also are in the business of developing and...
The best commercialized automotive glass treatment today is Aquapel by PPG. The coating is a fluorinated silane that chemically bonds to the hydroxyl groups of glass providing a durable treatment....
Larry, trade secret is a legal term that by definition is not disclosed. It is considered to be proprietary and confidential information. If you disclose what you consider to be a trade secreted...
Chris, thanks for the link to this story. As you're aware there has been some debate regarding the definition of a hardcoat (scratchcoat, etc) on this site. Hopefully, this puts that debate to rest.
Fluorochemicals are both oleophobic and hydrophobic where silicone and hydrocarbon based materials are only hydrophobic.
Chris, I can assure you that the hydrophobic/oleophobic coatings used to coat the top layer of an AR stack are not all the same. The premium coatings are all based on fluorochemistry but they are...
I'm not understanding why this coating is so revolutionary. You have not listed how its applied, how it's cured, the optical properties, QUV weathering, what substrate it's intended, etc. For your...
Larry, I also work for a company that manufactures hard coats (scratch resistant coatings, abrasion resistant coatings, or whatever you want to call them). Though there are many types and classes of...
The reference above is not an issued patent but rather a patent application for PCT. Applications publish a period of time after filing. I believe it to be 12 mos in Europe and 18 mos in the US. ...
In North America the 3M LEAP Pad LSE is sold through Satisloh.
Actually the newest product from 3M is the LEAP LSE finishing block pad. LSE is for low surface energy and has a specially formulated adhesive that has improved adhesion to super hydrophobic coated...
Julian, I agree. Abrasion resistant coatings can serve purposes beyond their primary purpose of scratch resistance. In the company I work for, we devote considerable R&D resources towards development...
Larry, where did you learn that the purpose of a hardcoat is to improve the adhesion of the AR coating? I agree that the terms scratch coat and hardcoat are used loosely. But their purpose with...
If the hardcoat is applied with a uniform coating thickness then a rainbow effect, interference, will not be observed even if the refractive indices of the substrate and the coating do not match. ...