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Application of Water-White/Colorless Hydrogenated Terpene Resin in Electronic Component Packaging

Application of Water-White/Colorless Hydrogenated Terpene Resin in Electronic Component Packaging

By: Foreverest

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Foreverest® Hydrogenated terpene resin polymer is a new type of polymer material. The resin can achieve water-white grade and colorless grade, with low halogen content and good compatibility. Currently, various downstream industries such as electronic packaging, plastics, coatings, inks, and hygiene product materials are gradually increasing the proportion of using light-colored terpene resins.

In the electronics industry, OLED (Organic Light Emitting Diode), also known as organic EL (Electroluminescence), is prepared in a thin film form by stacking layers of organic compounds (ITO transparent anode electrode, organic film, cathode metal electrode) as the light-emitting layer on a substrate. However, due to the sensitivity of organic films or metal electrodes or organic gases generated by constituent components to impurities, oxygen and water vapor, there is a problem that external exposure or water and oxygen permeation can easily deteriorate its characteristics. The deterioration of these organic materials affects the luminous characteristics of OLEDs and shortens product life. To prevent this issue, a thin film encapsulation process is required to prevent oxygen and moisture from entering the interior of electronic devices.

In the above applications, traditional production processes involve molding metal or glass into a cover shape with grooves and loading desiccants in powder form into the grooves for moisture absorption. Hydrogenated terpene resin can be used as a tackifier agent (Patent.CN109423234B) for the bonding layer of packaging materials, and combined with a humidifier (such as titanium dioxide, zirconium oxide or metal salts) and a curing agent (such as free polyurethane acrylate curing agents or acrylic curing agents) to form a bonding composite. By removing and blocking harmful substances such as moisture and impurities from approaching organic electronic compounds, it prevents interlayer peeling that may occur when removing moisture while maintaining excellent moisture resistance and heat resistance properties. This effectively prevents degradation of electronic device components, improves OLED reliability and product life span.

In addition, hydrogenated terpene resin can also be used in resin compositions (Patent.CN106165534B, CN107113928A) for the packaging of OLED electronic components. It provides a good adhesive interface that adheres well to electronic device components. Due to its good compatibility, hydrogenated terpene resin can be used alone or combined with C5 and C9 hydrogenated petroleum resins to form a component of hydrogenated cycloalkene resins. The polymer that exhibits rubber elasticity, obtained through a polymerization, can be utilized as a constituent of the encapsulation layer. This resin composition has high water vapor barrier properties and strong adhesion (peel strength). Its excellent followability on the adherend prevents air bubbles from being mixed between the package and the adherend during packaging. It can improve the durability of OLED electronic device components and maintain an attractive appearance during packaging.

Foreverest® Hydrogenated terpene resin is produced through a hydrogenation reduction method, which eliminates the impact of unstable carbon-carbon double bonds found in the original terpene resin molecules. The prepared resin can be decolorized to Grade Water-white or Grade Colorless. At the same time, hydrogenation reaction can reduce the content of residual halogens in the resin, further improving its weather resistance. On one hand, it has excellent compatibility with rubber, EVA, SBS, SIS and other copolymers and can interact with each other to produce other modified resins (Wangjing, 2009). On the other hand, during decolorization process, hydrogenation reaction can also reduce colored substances that have already formed without significantly changing the original excellent properties of terpene resin.