title: Water-based adhesives with tailored hydrophobic association: dilution resistance and improved setting behavior.
abstract: Hydrophobic association and stimuli-responsiveness is a powerful tool towards water-based adhesives with strongly improved properties, which is demonstrated based on the example of hydrophobically modified alkali-soluble latexes (HASE) with modulated association. Their rheological properties are highly tunable due to the hydrophobic domains that act as physical crosslinking sites of adjustable interaction strength. Ethanol, propanol, and butanol are used as water-soluble model additives with different hydrophobicity in order to specifically target the association sites and impact the viscoelastic properties and stimuli-responsiveness. The rheological and mechanical property response upon dilution with water can be tailored, and dilution-resistant or even dilution-thickening systems are obtained. The investigations are of high importance for water-based adhesives, as our findings provide insight into general structure-property relationships to improve their setting behavior, especially upon contact with wet substrates.
authors.affiliation: Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany; Henkel AG & Co. KGaA, Adhesive Research, Henkelstrasse 67, 40191, Düsseldorf, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Dundua
authors.forename: Katharina
authors.initials: K
authors.lastname: Landfester
authors.forename: Andreas
authors.initials: A
authors.lastname: Taden
mesh_terms: D000433:1-Propanol / Q000737:chemistry; D000269:Adhesives / Q000737:chemistry*; D000440:Butanols / Q000737:chemistry; D004548:Elasticity; D000431:Ethanol / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D007700:Kinetics; D016014:Linear Models; D008422:Materials Testing / Q000379:methods; D008956:Models, Chemical; D013499:Surface Properties; D013718:Tensile Strength; D014783:Viscosity; D014867:Water / Q000737:chemistry*
chemical_list: D000269:Adhesives; D000440:Butanols; D014867:Water; D000431:Ethanol; D000433:1-Propanol
keywords: adaptive materials; hydrophobically modified polyelectrolytes; physical cross-linking; rheology; setting; stimuli-responsive; water-based adhesives