2014 R&D 100 Winner
Green Theme Technologies' The ChemStik Technology: Water-Repellent Treatment for Performance Outdoor ApparelFor the past 40 years, apparel brands have applied water-repellent finishes to a variety of casual and performance garments. This has long been accomplished through the use of “C8” fluorocarbon-based textile finishes. However, C8 fluorocarbons are being banned because of their persistence in the environment and associated health risks. This is forcing the industry to transition to the use of shorter-chain C6 fluorocarbons that are friendlier to the environment, but hurt performance and fabric softness. A new approach to water-repellent fabric may reverse these fortunes. With support from Under Armour Inc., Green Theme Technologies LLC has created The ChemStik Technology: Water-Repellent Treatment for Performance Outdoor Apparel. While prior methods used “wet” chemistry, ChemStik technology is “dry” and free of solvents and volatile organic compounds. Hydrocarbon monomers are applied to one or both surfaces of the fabric and subsequently converted to polymers through polymerization. This occurs during the dry curing step, which can be performed thermally or with plasma. In addition, the ChemStik technology uses monomer cross-linkers, which increase the strength and stability of the polymers they connect, permanently bonding the polymer to the fabric. The treatment, called Evergreen, is permanent.

Water-repellent treatment

Green Theme Technologies LLC
Under Armour Inc.

Development Team

The ChemStik Technology: Water-repellent treatment for Performance Outdoor Apparel development team (l-r): Kwaku Temeng (Under Armour) and Gary Selwyn (Green Theme Technologies LLC).













The ChemStik Technology: Water-Repellent Treatment for Performance Outdoor Apparel Development Team
Gary S. Selwyn, Principal Developer, Green Theme Technologies LLC
Kwaku Temeng, Principal Developer, Under Armour Inc.