Non-cytotoxic epoxy withstands multiple methods of medical sterilisation

13-02-2023 | Masterbond | Industrial

Master Bond EP41S-5Med is a two-part epoxy system that meets the demands of ISO 10993-5 for non-cytotoxicity and can be employed for sealing, bonding, and coating in medical devices. It offers high-temperature resistance and excellent strength properties. As an electrically insulative material, it can be used in medical electronic applications.

This epoxy has been tested against multiple sterilisation methods, such as autoclaving, STERRAD, Cidex and Steris, successfully resisting 100 cycles. It can also withstand exposure to ethylene oxide, gamma radiation, and other aggressive sterilants and chemicals. The epoxy offers a tensile strength of 10,000-12,000psi and adheres well to various similar and dissimilar substrates, including metals, ceramics, plastics, rubbers, and composites. This compound offers a glass transition temperature of 140-145C and is serviceable from -80F to +450F [-62C to +232C]. It provides reliable electrical insulation characteristics with a dielectric constant of 3.5 at 60Hz and a volume resistivity greater than 1014-Ohm-cm.

The system is black in colour and has no solvents or diluents. It provides convenient handling with a 100 to 25 mix ratio by weight. The mixed epoxy has excellent flow properties with a moderate viscosity of 25,000-30,000cps. Upon cure, it provides low shrinkage and a hardness of 85-95 Shore D. It is supplied in standard-sized units of half-pint, pint, quart, and gallon kits and is compatible with automated gun dispensing systems.