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Fluoropolymer low reflecting layers for plastic lenses and devicesFluoropolymer low reflecting layers for plastic lenses and devices description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20090054594, Fluoropolymer low reflecting layers for plastic lenses and devices. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF INVENTION
The present invention relates to fluoropolymer coated plastics. More specifically, it relates to fluoropolymer coated plastics having good adhesion, low reflective properties, and water and oil repellency. TECHNICAL BACKGROUNDMuch work has been done concerning low reflective plastics, particularly for plastic lenses and optical devices. One method used is vapor disposition of oxidized metal on the surface of the plastic. However, this method uses a batch process and when the substrate is large, the productivity becomes low. Another way is to apply a coating of fluoropolymer solutions. The coating is done by a dipping process and is applicable for large substrates with high productivity. Though fluoropolymers have low reflective indexes, they also have very poor adhesion with plastic substrates. Improvement in the adhesion between fluoropolymers and substrate plastics has been long sought. The purpose of this invention is to provide the technology for low reflective index and good adhesion using fluoropolymer solutions. SUMMARY OF THE INVENTIONThe one layer coating system provided by the present invention consists of a fluorinated copolymer having the formula: VF2/TFE/HFP wherein the molar ratio of Tetrafluoroethylene (TFE) to Hexafluoropropylene (HFP) is between 0.1 and 1.9, and the VF2 content is 12 to 60 mole %. Preferably the VF2 content is 12 to 50 mole % for PMMA substrates and 18 to 50 mole % for PC, PET, and PS substrates. More preferred is where the molar ratio of TFE to HFP is between 0.9 and 1.9, and the VF2 content is preferably 12 to 50 mole % for Polymethylmethacrylate (PMMA) substrates and 18 to 50 mole % for Polycarbonate (PC), Polyethyleneterephthalate (PET), and Polysulfone (PS) substrates. Also preferred is where the VF2 content is greater than 50 mole % to 60 mole %; more preferred is where the substrate is PMMA, PC, PET or glass. A one layer coating system is also provided by the present invention comprising a fluorinated copolymer having the formula VF2/HFP wherein the VF2 content is about 40-80 mole %. Preferably, the VF2 content is about 40-50 mole % and the substrate is PMMA. Also preferably, the VF2 content is about 70-80 mole % and the substrate is glass. A one layer coating system is also provided by the present invention comprising a fluorinated copolymer having the formula VF2/TFE/PMVE Continue reading about Fluoropolymer low reflecting layers for plastic lenses and devices... Full patent description for Fluoropolymer low reflecting layers for plastic lenses and devices Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Fluoropolymer low reflecting layers for plastic lenses and devices patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Fluoropolymer low reflecting layers for plastic lenses and devices or other areas of interest. ### Previous Patent Application: Fluoroelastomer composition and molded fluororubber article Next Patent Application: Compounding formulations for producing articles from guayule natural rubber Industry Class: Synthetic resins or natural rubbers -- part of the class 520 series ### FreshPatents.com Support Thank you for viewing the Fluoropolymer low reflecting layers for plastic lenses and devices patent info. IP-related news and info Results in 0.65483 seconds Other interesting Feshpatents.com categories: Qualcomm , Schering-Plough , Schlumberger , Seagate , Siemens , Texas Instruments , orig |
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