Understanding how mixture design finds PUR hot-melt solutions
During the past several years, polyurethane reactive (PUR) hot-melt adhesives, also known as reactive hot-melt adhesives, have grown in use in the product assembly market. As a result, extremely diverse applications and requirements for PUR hot-melt adhesives are being encountered.
Our customers are frequently PUR hot-melt adhesive companies who think of us as a "chemical company's chemical company." To simplify formulation tasks when searching for hot-melt solutions, we developed a design of experiments (DOE) ‘mapping' approach to our new ortho-phlathic-based polyol products. Our objective was to help formulators discover how our products work within their specific applications. Armed with this DOE mixture design map, adhesives chemists can now review the typical properties these esters provide, including open time (how long an adhesive can still bond with another surface after being applied), green strength (how quickly a bond strength develops), and substrate bonding profiles.