At this year’s FECIA conference, Croda showcased its smart approach to reach sustainability. Their approach is to: Offer, Support & Develop:

1. Offer innovative environmentally friendly solutions
   1. Including natural, bio-derived products
   2. Safer/milder ingredients
2. Support customers in meeting environmental regulations and CO₂ reductions
   1. Support for certification and LCA
3. Develop products that allow people to maximize performance and value, whilst:
   1. Reducing energy use
   2. Minimizing environmental impact of technology
   3. Improving efficiency

Adhesives in Electronics

Innovating for a high-performance and sustainable future. ©Croda

To enhance the performance and sustainability profile of adhesives for electronics, use:

• Bio-based building blocks
• Epoxy functional toughening agent

These bring:

• Increased impact resistance for longer lifetime
• Excellent water barrier properties for durability and allowing use of aluminum for lightweight solutions
• Improved multi-substrate adhesion
• Enhanced flexibility

Priplast Bio-based Technology – Dimer-based Polyester Polyols

Adhesives and sealants on a PCB. ©Croda

Electronics, Sensors and Displays

B-Tough for Impact Strength of Epoxy Adhesives

Phase Separated Morphology

1. B-Tough epoxy functional toughening agent
2. Forms soft rubbery particles in the hard epoxy matrix
3. Results in impact strength
4. Toughness: Rubbery particles restrict crack growth
   1. B-Tough absorbs impact and thermal stress
   2. Reduces fatigue
   3. Improves T-peel strength
5. While maintaining hardness and high-temperature performance
6. In addition, B-Tough rubber domains are a barrier to moisture
7. Moisture diffusion an order of magnitude lower than CTBN modified

B-Tough Matching the Polarity of the Epoxy System

Polarity of the expoxy system. ©Croda

There are three grades of B-Tough A available with a range of polarities to fit the epoxy system

• Match B-Tough polarity to the epoxy system
• Should be compatible enough to react
• Becoming incompatible during cure, resulting in phase separation

Enhanced Impact Resistance

Fracture resistance of solid epoxy based adhesive. B-Tough A allows superior fracture resistance over unmodified epoxies and epoxy adduct of carboxyl-terminated butadiene nitrile rubber. Available in 3 different polarities to match with the epoxy polarity.

• Improved Adhesion to Metal
• Lap shear adhesion to steel
  • Lap shear adhesion on Mild and Stainless Steel
  • Adhesive force [MPa] (adhesive failure, or no break = NB)

Priamine in Adhesives

Dimer diamine for Polyamide, Epoxy and Polyimide

• Formulation freedom to adjust melting point
• To protect substrates from moisture
• To improve adhesion to low polarity substrates (plastics)
• To obtain flexible adhesives
• Based on renewable raw material

Sustainability Impact

Life Cycle of Biobased vs. Fossil Fuel Based Products

Case Study 1 -Avoided Emissions through use of Priplast in double glazed windows

As well as measuring the intrinsic benefits of our products, we are increasingly looking at the extrinsic sustainability benefits of our products.

Case Study 2 – Avoided Emissions through use of Priplast in LED light potting