MX‑553 is a ready‑to‑use liquid toughening masterbatch where nano core‑shell rubber (CSR) particles are uniformly predispersed inside cycloaliphatic epoxy carrier. Different from conventional bisphenol‑A‑based CSR masterbatches, the cycloaliphatic epoxy matrix delivers excellent light transmittance and low yellowing tendency under long‑term illumination. This toughener effectively enhances fracture toughness and thermal‑shock resistance of cured optical epoxy without severely sacrificing transpa

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Product Detail PageChemical IdentityMX‑553 is a predispersed liquid CSR masterbatch adopting cycloaliphatic epoxy as the carrier resin. Nano‑sized core‑shell rubber particles are homogenously suspended within low‑chlorine cycloaliphatic epoxy via strict emulsion‑polymerization and dispersion technology. Rubber particles maintain discrete state without agglomeration inside the supplied liquid product. The cycloaliphatic epoxy carrier features outstanding UV‑resistance and inherent clarity. It shows good miscibility with other cycloaliphatic epoxy grades and is compatible with anhydride curing agents commonly used for optical epoxy formulations. It is provided as clear‑toned viscous liquid and can be directly blended into optical base epoxy without additional grinding or high‑shear dispersion.

Key PerformanceAfter curing of the cycloaliphatic epoxy system, embedded nano‑CSR particles function as micro energy‑absorbing domains inside the cross‑linked thermoset network. When cured optical epoxy assemblies are exposed to rapid temperature changes, these fine rubber particles dissipate internal stress, inhibit crack formation and slow crack propagation. Thanks to carefully controlled nano particle dimension, MX‑553 will not introduce obvious haze and greatly preserves the high light‑transmitting property of optical epoxy. It improves thermal‑cycle durability for LED encapsulation layers, reducing encapsulant cracking during hot‑cold cycling of LED devices. The formulation maintains good anti‑yellowing performance under long‑time blue‑light and UV exposure. Meanwhile, the masterbatch brings moderate viscosity increase during mixing, which suits the dispensing and moulding processes of optoelectronic encapsulation production.

ApplicationsMX‑553 is primarily developed for LED encapsulation using optical cycloaliphatic epoxy systems. It is suitable for high‑power LED packaging, COB LED encapsulation and other optoelectronic components requiring transparent epoxy encapsulation. This CSR toughening masterbatch is also applicable for other optical epoxy products such as optical lens casting, light‑guide component moulding, and transparent optical potting for photoelectric modules. It helps formulators solve the typical cracking problem of rigid cycloaliphatic epoxy under thermal shock, while retaining critical optical performance indicators. MX‑553 matches the manufacturing workflows of LED packaging factories including automatic dispensing, mould filling and thermal curing processes.

Storage & HandlingStore MX‑553 in hermetically sealed original drums inside a cool, dry warehouse; recommended storage temperature ranges 15‑25℃. Avoid prolonged high‑temperature storage which may trigger gradual viscosity growth. Low‑temperature environment will raise fluid viscosity; mild, gradual warming is acceptable before material usage. Keep the product away from direct sunlight. Once the drum is opened, reseal the container promptly to block moisture ingress. Ensure adequate local ventilation in the working area during material transferring and epoxy compounding. Operators must wear chemical‑resistant gloves, safety goggles and protective clothing to avoid direct skin and eye contact.

Why Choose SupplierWe provide stable‑quality alternative grade corresponding to MX‑553 cycloaliphatic CSR epoxy toughener for optoelectronic encapsulation and optical epoxy manufacturers. Complete TDS and MSDS documentation are prepared for export business. Bulk drum supply as well as small trial‑order packaging can be arranged. Our product assists overseas optoelectronic material factories in developing anti‑crack optical epoxy and high‑reliability LED encapsulant formulations.

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Cycloaliphatic Epoxy Toughener MX-553, CSR in Cycloaliphatic Epoxy for LED Encapsulation Optical Epoxy

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.