Bio-based Multi-purpose Adhesive with Excellent Adhesion

DELO has developed an adhesive that consists primarily of bio-based components and combines performance with sustainability. DELO PHOTOBOND SJ4192 is characterized by excellent moisture resistance as well as high flexibility and peel strength. As a multi-purpose adhesive, it is suitable for metal, glass and plastics and can help achieve sustainability goals in the automotive industry, for example.

DELO PHOTOBOND SJ4192 consists of 62 percent renewable raw materials. Precursors from corn and castor oil make up a large portion of the resin components. The bio-based formulation conserves finite resources while delivering excellent performance.

The new adhesive surpasses its non-bio-based predecessor product in many mechanical properties, as comprehensive tests confirm. It is characterized by improved plastic adhesion, particularly on polycarbonate surfaces, which are used, for example, in frame and housing bonds for navigation displays in cars. In addition, it offers low outgassing as well as high long-term moisture resistance while maintaining excellent flexibility—on plastics as well as on metal and glass.

DELO PHOTOBOND SJ4192 is typically applied using needle dispensing. Curing takes place with low CO₂ emissions through UV or visible light in just a few seconds.

DELO has been replacing fossil raw materials with renewable alternatives for many years, wherever this is technically feasible. The condition for this is that the adhesive properties fully meet high customer requirements. 

"Developing bio-based adhesives is one of our long-term sustainability projects," explains Dr. Karl Bitzer, Managing Director of DELO. "Our chemistry team works continuously to identify and integrate sustainable alternative raw materials. It is particularly impressive when the technical properties can be improved as well. This shows the great potential of these raw materials. We look forward to being able to offer our customers further high-tech adhesives with high bio content in the future," says Bitzer.

DELO PHOTOBOND SJ4192 is the first DELO adhesive where the share of sustainable ingredients exceeds half. The company is already working on expanding its portfolio, including systems with light-moisture and light-heat curing.