3 / 4
E u r o s c i c o n C o n f e r e n c e o n
Physical Chemistry and
Analytical Separation Techniques
Journal of Organic & Inorganic Chemistry
ISSN: 2472-1123
October 08-09 , 2018
Amsterdam, Nether l ands
Physical Chemistry and Analytical Separation Techniques 2018
Page 17
H
ow to achieve a high-gloss surface for a water-borne coating drying on top of
an uneven substrate? To answer this question, we examined the gloss level
of dried topcoats as a function of a series variables both related to the substrate
(: topography) and the topcoat (: volume fraction non-volatile components, film
thickness, viscosity of the emulsified binder and rate of X-linking). To reveal the
basic mechanisms underlying gloss development, we monitored the evolution of
the surface topography of drying topcoats, using a white light interferometer. The
study revealed the existence of two distinct different stages in the evolution of
the surface topography. Firstly, the glossy wet film surface becomes uneven due
to (damped) telegraphing of the substrate unevenness, driven by evaporation of
water. This process is accompanied by loss of gloss. After coalescence of the
emulsified binder particles subsequently, the telegraphed unevenness levels out
driven by pressure gradients. This process results into gloss recovery. Full gloss
recovery is promoted by low viscosity of the emulsified binder, high film thickness
and slow X-linking
Waterborne topcoats: it is the final flow that
makes the coating shine
Bart Reuvers and A Veurink
1
DSM Resins, Netherlands
Bart Reuvers et al., J Org Inorg Chem 2018 Volume: 4
DOI: 10.21767/2472-1123-C6-016
Biography
Bart Reuvers has completed his PhD from Twente University.
He worked as a Physical Chemist at Akzo Nobel Coatings for
20 years. Currently, he is working as a Senior Scientist at DSM
Resins in the field of Rheology. He has published more than ten
papers in reputed journals.
bart.reuvers@DSM.com