T-61330 Fluorine-Modified Low Refractive Index UV Resin For Optical Coatings And Adhesives

T-61330 is a difunctional fluorine-modified acrylate UV resin developed by Shenzhen Youyang Technology Co., Ltd. It combines a low refractive index of 1.330 with the low dielectric constant and low surface tension typical of fluorinated resins. The product is free of heavy metals and is positioned to meet RoHS and PFAS-related environmental requirements. With 100% effective content and moderate viscosity, T-61330 is suitable for nanoimprint and transfer processes as well as bonding applications where a low-index UV-curable material is required.

Key Technical Properties

These are typical values for formulation screening. For commercial use, always refer to the current batch certificate of analysis and the controlled TDS.

Curing Behavior

Because of its high fluorine content, T-61330 requires curing under anaerobic film-covered conditions or under nitrogen protection when applied as a thin film. For thick-film dispensing, cure is relatively faster and less sensitive to ambient oxygen. This difference should be considered when designing coating or bonding processes, as thin-layer applications may need inert gas blanketing or film lamination.

Applications

UV adhesives: The high-fluorine structure gives T-61330 good leveling, heat resistance, low refractive index, and low shrinkage, making it suitable for optical bonding where index matching and stress control matter.

UV coatings: T-61330 is recommended as a main resin for UV coatings, inks, and adhesives used in functional films and optical materials requiring low refractive index. Typical areas include medical devices, communication components, optical fiber coatings, anti-reflective coatings, and AR film materials.

In multilayer optical designs, a refractive index of 1.330 provides a useful contrast against higher-index layers, which can help reduce layer count or broaden process windows in wet-coating-based anti-reflective stacks.

Compatibility and Dilution

Fluorinated resins generally have limited miscibility with conventional hydrocarbon-based resins, especially high-molecular-weight or high-viscosity grades. For monomer dilution, LM-502 fluorine-modified acrylate monomer is recommended to adjust viscosity while maintaining the low-index character. For polymer blending, pre-mix T-61330 with a low-molecular-weight fluorinated monomer or low-viscosity resin at low shear, confirm the blend is uniform and free of haze or precipitation, then add other components.

Compliance Note

T-61330 is formulated without heavy metals and is positioned to meet RoHS and PFAS-related requirements. PFAS regulations are still evolving in several markets; formulators targeting regulated regions should verify the current compliance status of each raw material against the applicable scope and exemptions.

FAQ

Is T-61330 suitable for nanoimprint? Yes, its viscosity and refractive index make it suitable for nanoimprint and transfer processes, but thin films require anaerobic or nitrogen-assisted curing.

Can conventional acrylate monomers be used to dilute T-61330? They can reduce viscosity, but may raise the refractive index of the cured film. Fluorinated monomers such as LM-502 are preferred when maintaining low refractive index is important.

What should be confirmed before scale-up? Cure atmosphere for the specific film thickness, miscibility with the full formulation, refractive index after adding diluents and additives, and current regulatory status for the target market.

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