Overall Conclusions
The following results are charted as “++” for best results; “+” for moderate results; or “-“ for no or very little improvement. Blanks
indicate that product/system was not tested.
One can see that the FPE type products are
always compatible resulting in few or no defects
or reduction in gloss and generally give good
improvements in the properties. The FS series,
Using a similar analysis to look
at stain resistance in more detail, the
same overall conclusions are support-
ed. The compatible FPE type products
give good results, the FS fluoroalkyl-
silicones give good results but have
defect problems, and the FA alkyl fluo-
roalkyl type is often the best balance.
Worthy of more thought and experimentation is the consistently very good behavior of FA 3, FA 3ACR and FS 2 – which have
a smaller amount of %CF2 than the other FASs studied. Going into the study, we expected the highest CF2 content materials to
provide the most slip, stain resistance and fingerprint resistance due to the lipophobic nature of perfluoroalkyl materials. That is
not the case in this study, the presence of CF2 groups helps this behavior, but maximizing the amount of CF2 is not the optimum,
in fact the best FAS additives have a little CF2 content and very high (80%) silicone content.
This observation may indicate that only a little perfluoroalkyl is needed, an important fact for cost considerations. CW
References:
EPA factsheet; “Emerging Contaminants – Perfluorooctane Sulfonate (PFOS) and Perfluorooctanoic Acid (PFOA)”, www.EPA.
gov, May 2012
Ruckle; Cheung, Proceedings of the Waterborne Symposium, 2013
WATER-BASED STAINS WAXY STAINS
