FluorAcryl™ 6298 is a hydrophobic, oleophobic perfluoropolyether poly-acrylate functional oligomer with excellent resistance to solvents, oils, stains and abrasion. Applications for 6298 include touch screens, electronic devices and micro-fluidic electrowetting devices. Substrates for 6298 include plastic, metal, glass and ceramic. 6298 can be applied by dip, spray, jet, roll, draw or screen print methods after dilution. When smooth and well-cured, contact angles to mineral oil of greater than 65° and roll-off angles of less than 3° can be achieved. 6298 is stain resistance to tea, coffee, water and iodine tincture (ISO 4211 5 = no stain). Magic marker stains beads up and is removed by an alcohol wipe.
- IPA, MEK resistance: >500 cotton rubs - Pencil mar at 25 grams: >2H - Refractive Index: ~1.32
Size: 100 grams (125 ml container) Application methods: Screen printing, pad printing, direct or reverse roll, offset gravure, metering rod, slot die, knife over roll, air knife, curtain, immersion, spin, dipping, etc. Curing: 360-420 nm UV using 350 to 600 watts per square inch Color: Clear Water contact angle: over 100° Oil contact angle: over 80° Solvent resistance: Acetone, ethanol, MEK, etc.
When used as an additive at low dosage (0.5% - 5% w/w) in another UV-curable formulation, 6298 does not require special curing conditions. When a high content (25% to 90% w/w) of 6298 is desired, a suitable photoinitiators (such as MicroCure-CTO 46 or Darocur 1173) and reactive diluents (such as Sartomer SR351/TMPTA, SR238/HDDA and/or SR285/THFFA) may be needed. After diluting the mixture with butyl-acetate, ethyl-acetate or similar solvent, apply the mixture on the substrate using spray, roll, doctor blade, meter rod, etc. to obtain a coating of the desired thickness. After the solvent has evaporated, irradiate with a medium pressure vapor mercury lamp (220-320 nm UV, if possible under inert nitrogen) to a pencil hardness of greater than #2 at 3 Joules per square centimeter.