I'm studying the formulation of a hydrophilic lubricious coating for a stainless steel substrate for use in an acidic aqueous environment.
polyvinilpyrrolidone, PEG/PPG and silicone lubricious coatings. So my first question is: does hydrophilic lubricious coating = hydrogel ?
According to one patent 'a polymeric diisocyanate is grafted to the substrate surfece and is then placed into water creating a urea bond and thus activating the hydrogel' - this does not make sence to me, has anyone experience of 'activating a hydrogel using such a method' ?
If I can include enough of a hydrophilic polymer in a crosslinked hydrophobic polymer and then swell it in water do I get a lubricious coating ?
thanks in advance,
Bob