Two of the more common 2K coatings systems are polyurethane and epoxy. Part two of this series concentrates on urethanes and 100%-solids systems. 

Polycaprolactone (PCL) polyols can be used to enhance coatings that feature other polymer chemistries in both 1K and 2K coatings. This article explores the performance benefits achieved when low-molecular-weight PCL tri- and tetra-functional polyols are blended with other hydroxyl-functional polymers in 2K coatings.

This study comprehensively evaluated novel, ultra-low-VOC 1K and 2K waterborne floor-coating systems designed to provide eco-friendly, lower-VOC alternatives to traditional solvent-based coatings. The materials employed in these innovative systems showed remarkable performance when subjected to industry-standard tests.

Two of the more common 2K coatings systems are polyurethane and epoxy. This and next month’s Formulating with Mike column will concentrate on urethanes, with this issue focusing on polyurethane polymers. 

This article reviews several reasons for the excellent physical properties of polyurethanes and polyureas, as well as how these reasons differ between the two chemistries. Included, also, is a technology review and benefit/drawback analysis of several of the sub-coating classes, including conventional thin-film coatings as well as 100% solids, thick-film coatings.  

This study introduces the use of 1,3-Propanediol (1,3-PDO) in polyurethanes as a building block component of polyester and polyether polyols, and as a chain extender. The bio-based coatings prepared in this investigation provided useful physio-mechanical properties, chemical resistance, and water resistance compared to reference commercial petroleum-based two-component PUDs.

We currently use a "midnight black” wrinkle powder coating supplied by a major powder producer. Can a second touchup coat be applied after the first coat has cured? Read the answer to this question and more in this edition of Ask Joe Powder. 

New and stricter regulations on the use of certain chemicals can pose significant operational challenges for industry. In printing inks, the use of PTFE is being impacted by new PFOA regulations in Europe as well as Japan and the United States.

In a PCI interview, Christina Mahally of Dow Polyurethanes discusses polyurethanes, how they are used in coatings and other industries, and the current market climate.