Denacol Epoxy Applications by Nagase Group: Tire Cord Fabric, Electronic Adhesives, and Transdermal Patches

Nagase ChemteX, a factory of Nagase Industries in Japan, produces a wide range of epoxy resins under the brand name DENACOL. The product line includes dozens of grades, each composed of different main chain structures, such as aliphatic and aromatic, as well as varying numbers of functional groups (single, double, multi). The epoxy groups of DENACOL react with the functional groups of the substrate to crosslink, thereby enhancing adhesion, toughness, and other properties.

Main uses includeCrosslinking agent for tire cord fabric, reactive diluent for electronic adhesives, pharmaceutical excipient for transdermal patchesIn addition, it is widely accepted by the market for various applications such as a crosslinking agent for SAP superabsorbent resin, a raw material for 3D resin, and for archaeological silk restoration.

Product List

High-performance tire cord fabric

For EV and high-end car tires, the traditional PET tire cord fabric is gradually being replaced by aramid, nylon, or their blended fibers. High-performance fibers such as aramid have less grip with rubber compared to traditional PET. EX-512 and EX-614B have more functional groups than traditional epoxy resins, enhancing the adhesion between high-performance fiber cord fabric and rubber.

EX-512 (Polyglycerol Polyricinoleate) not only has a higher number of epoxy groups but also possesses polymer properties, providing adhesion and strength while also maintaining flexibility.

EX-614B (sorbitol polyether glycerol ether) has four epoxy groups, resulting in a higher degree of cross-linking and stronger adhesion.

Electronic adhesive

The DENACOL low-chlorine series has been developed as reactive diluents for electronic adhesives, which can cure with base resins and eliminate the need for additional removal processes. Its representative grades include EX-146P (p-tert-butylphenyl glycidyl ether) with total chlorine content as low as 100ppm, EX-201-IM (resorcinol diglycidyl ether) suitable for conductive adhesives, and EX-214L (1,4-butanediol diglycidyl ether) with an aliphatic structure.

Introducing a unique diluent, EX-991L, which can impart flexibility (bend resistance) to electronic adhesives when added, making it particularly beneficial for foldable screen applications. It enhances the flexibility of the display panel while ensuring adhesive strength and bending life, achieving no delamination and no breakage.

Transdermal patch

Polypropylene glycol glycidyl ether EX-512 and EX-313, by cross-linking with the substrate, lock in the active ingredients and moisture in transdermal patches, and can be used as stabilizers for transdermal patches.