Low refractive index resin
Transparent resin that can be adjusted to a refractive index of 1.7 or more and 1.4 or less
NTT-AT provides low refractive index resins with a refractive index of 1.4 or less based on refractive index control technology and loss reduction technology, which are the base technologies for optical communication adhesives.
Low refractive index and excellent transparency.
It is expected to be applied to the optical recording field, the display field, the optical energy utilization field, etc.
Features
High transparency
High transmittance of over 90% at 1mm thickness
Refractive index customization
Adjustable to a low refractive index of 1.4 or less
High-precision refractive index adjustment
High-precision refractive index adjustment of ±0.005 is possible
Characteristic
| item | conditions | unit | Acrylate * | epoxy | ||
|---|---|---|---|---|---|---|
| #18204 | #18114 | E3810 | ||||
| Curing conditions | UV intensity | mW/ cm2 | 10 | 10 | 10 | |
| irradiation time | min | 1 | 5 | 10 | ||
| Properties after curing | refractive index | 589 nm | - | 1.375 | 1.400 | 1.438 |
| Glass-transition temperature | Dynamic viscoelasticity: temperature at tan δ max | ℃ | 18 | 94 | 103 | |
| hardness | Shore Hardness Tester: 25℃ | - | D20 A85 |
D72 | D78 | |
| light transmittance | 450 nm | % | 89 | 92 | 76 | |
| 540nm | 91 | 94 | 86 | |||
| 630 nm | 91 | 94 | 89 | |||
| shear bond strength | glass/glass | kgf/ cm2 | 27 | 26 | >61 | |
*Acrylate low refractive index resin #18204 and #18114 are scheduled to be discontinued by the end of March 2024. If you have any questions, please contact us.
The characteristic values in the table are sample measurement values, not guaranteed values.
About purchase
For purchases or inquiries, please contact us via the inquiry form.
Outside of Japan, sales may be prohibited in some countries due to laws and regulations concerning chemical substances.
For information on overseas distributors, please check here.
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