Question: We use UV-curable adhesives in a medical device as adhesives and coatings. However, we are concerned about residual, uncured materials in the adhesive that might be toxic or cause corrosion. How can we ensure that the adhesive is always fully cured?
Answer: One never gets a full 100% cure of these thermoset systems at relatively low temperatures because molecular mobility goes down dramatically as the adhesive increases in viscosity during curing. However, look at the MSDS of the adhesive and talk to your supplier to ensure that it does not contain any components that might be toxic or cause corrosion of electrical connections, even in liquid form.