Polyurethane adhesives are used to produce high-performance materials such as electronics. Croda offers Priplast bio-based polyols that bring excellent durability and moisture protection, while ranging from soft to high-strength, depending on the application need. These polyols are made from natural oils with enhanced substrate wetting and offer lasting (low temperature) flexibility. The hydrocarbon character imparts water resistance and affinity for a wide range of substrates, including plastics and metal, which is required for potting and assembly. Furthermore, the bio-based polyols offer a unique combination of hydrolytic, thermo-oxidative and UV stability, which is highly relevant for demanding electronic applications like sealing of electronic components and sensors or adhesion in flexible electronics and displays.
Epoxy adhesives are used for potting, encapsulation and bonding of electronic components. Croda offers B-Tough reactive toughening agents to enhance impact performance and thermal shock resistance. Polyimides made with natural oil based aliphatic diamine Priamine can be used as strong adhesives that enable self-healing bonds to recover cracks formed by ageing or shock.
With these ingredients, adhesives can be used to enhance sustainability by reducing the carbon footprint of the adhesive and enabling in-use benefits. They allow durable solutions for lightweight design and miniaturisation.