16-07-2020 | Masterbond | Subs & Systems
Master Bond EP42HT-4AOMed Black is a new two-part epoxy designed for medical device manufacturing. It is biocompatible and non-cytotoxic, satisfying both USP Class VI and ISO 10993-5 certifications. This epoxy resists aggressive chemical sterilants, radiation and repeated cycles of autoclaving.
The epoxy provides both cryogenic serviceability and heat resistance with a service temperature range from 4K to 400F. Its thermal conductivity measures 9-10BTU•in/(ft2•hr•F) and its volume resistivity is greater than 1014Ohm-cm. The system includes a filler, which adds to its high strength profile and dimensional stability. This adhesive bonds favourably to metals, composites, glass, ceramics, rubbers and plastics and offers a tensile modulus of 500,000-550,000psi, compressive strength of 24,000-26,000psi, and tensile strength of 7,000-8,000psi.
This epoxy is able to cure at room temperature, yet faster cures can be accomplished by heat curing. To achieve optimal properties, an overnight cure at room temperature, followed by heat curing at 150-200F for 2-3 hours is recommended. The mix ratio is 100 to 40 by weight. Once mixed, this versatile adhesive has extremely good flow properties, making it ideal for bonding, sealing and coating applications. Upon curing, the epoxy exhibits very low shrinkage, low exotherm and can be employed for castings up to 2-3" thick. This opaque black epoxy is provided in the following size kits: half-pint, pint, quart and gallon. It is also offered in pre-mixed and frozen syringes, which are compatible with automated dispensing equipment.
