Grevenbroich, Germany -- Actega Rhenania has developed a novel series of solvent-free polyurethane adhesives for packaging laminates to be used in, as a result of growing customer demand.
The German sealants and coatings company said in a 22 Sept announcement that in the last two years solvent-free polyurethane adhesives have steadily gained in importance for laminate production in the packaging industry.
The new adhesives developed at Actega Rhenania need no solvents during processing and are applied at lower coating weights, giving economic and ecological advantages.
Actega Rhenania also wanted to develop adhesives with "a dominant amount of biomass-based raw materials," as part of sustainability programs to optimise products and processes. The aim was to cut its use of petrochemical raw materials and reduce carbon dioxide emissions, said the company, which is part of Altana Group.
The resulting range of adhesives have the following core properties:
• High content of polyols based on renewable raw materials, which can be cured preferably by aliphatic polyisocyanates. Formed polyurethanes are based on about 65 - 80 percent content of biomass.
• All raw materials comply with relevant food law regulations.
• Processability in common laminating machines and the overall performance comply with classic solvent-free polyurethane adhesives.