High Refractive Index / Low Refractive Index Resins

NTT-AT provides refractive index customized resins to meet each customer's needs.

Features

High Transparency of NTT-AT's resin coated substrate

(Photo: Dispersion of nanoparticles brought the combination of high refractive index and transparency into reality)

With the refractive index of 1.5 in normal resins, the problem of a high reflection loss arose in cases of adhesion with high refractive index glass and crystal materials.

Recently, resins with refractive indices of 1.7 or more, 1.4 or less and high refractive index, low refractive index resins, which are also excellent in transparency in visible light domains have been developed. As well as being adhesives for high refractive index glass and crystal materials, since they excel in transparency while also having a high refractive index, it is expected that they can be used as a coating agent for displays and similar products. Moreover, to match the particular working environment of our customers, we have prepared both ultraviolet curing and heat curing types.

We also have High Refractive Index Resins for Nanoimprint.

High Refractive Index / Low Refractive Index Resins Inquiry

Specifications / Details

3 Features of Refractive Index Control Resins (High Refractive Index / Low Refractive Index Types)

A refractive index of either 1.4 or less, or 1.7 or more can be chosen
Either the ultraviolet curing or heat curing hardening method can be chosen
High transparency in visible light domains

Characteristics Charts for Refractive Index Control Resins (High and Low Index Types)

Optical Transmittance

$Refractive Index Wavelength Dispersion$

Refractive Index Wavelength Dispersion

Application Examples for Refractive Index Control Resins (High and Low Index Types)

High and Low Refractive Index Coating Agents
Adhesives for High and Low Refractive Index Crystal Materials
Adhesives for High and Low Refractive Index Glass (for camera lenses, eyeglass lenses, etc.)
Higher Efficiency Optical Input and Output Power
Efficient Conversion of Light Energy

Refractive Index Control Resins Specifications (High Index Types)

Item		Test Conditions	Unit	Acryl		Epoxy
Item		Test Conditions	Unit	#18165	#6205 ^*1	E3754	#7200
Curing Condition		Intensity [365nm]	mW/cm²	10	100	100	100
Curing Condition		Time	min	5	5	5	10
After curing	Refractive Index (nD)	Abbe refractometers at 25°C	-	1.675	1.720	1.603	1.627
	Glass Transition Temperature [Tg]	Dynamic Viscoelastometer : tanδ_max	°C	113	68	73	63
	Optical Transmittance (50um thickness)	λ=450nm	%	94	72 ^*2	92	78
		λ=540nm		96	78 ^*2	96	88
		λ=630nm		96	81 ^*2	96	92
	Bond Sterngth	Glass / Glass	kgf/cm2	>48	35	>280	55

*1 : Tends to crystallize at low temperatures.

*2 : Thickness 90 μm

Refractive Index Control Resins Specifications (Low Index Types)

Item		Test Conditions	Unit	Acryl		Epoxy
Item		Test Conditions	Unit	#18204	#18114	E3810
Curing Condition		Intensity [365nm]	mW/cm²	10	10	100
Curing Condition		Time	min	1	5	10
After curing	Refractive Index (nD)	Abbe refractometers at 25°C	-	1.375	1.400	1.438
	Glass Transition Temperature [Tg]	Dynamic Viscoelastometer : tanδ_max	°C	18	94	103
	Optical Transmittance （Thickness 1mm）	λ=450nm	%	89	92	76
		λ=540nm		91	94	86
		λ=630nm		91	94	89
	Bond Sterngth	Glass / Glass	kgf/cm2	27	26	>61

The characteristic values shown in this table are sample measured values, and do not constitute guaranteed performance values.

Related Products

Optical Adhesives and Resins

High Refractive Index Resins for Nanoimprint

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