A 3 mm thick layer of Polyurethane is adhered to a glass plate (10 mm thickness). Are there any chemicals that will dissolve the PUR or make detachment from the glass surface easier?
Polyurethane (PUR or PU) is a polymer composed of organic units joined by carbamate or urethane links. Note that polyurethane is not a uniform class of material. The chemical resistances listed in the attachment can help.
In addition, you might only need to heat the plate to the softening point of the polymer or above glass transition temperature and then remove it.
Regards,
TD
hello
if you don't have problem with heating you can heat your glass till 700 degree
Try with polar solvents (alcohol, iPrOH, methyl-ethyl kentone, acetone) and rubbing. If it is heavily crosslinked, rubbing will be more important than solvent.
you can use solvent with heating also.
as Gyorgy said the polar solvent are the best.
another way is using of knife blade after using of polar solvent :)
Due to the organic layer thickness, I advice to do a thermal treatment at about 350°C ( temperatures above 450-500°C can affect the glass plate planarity), to burn a little the polymer and to weaken its adhesion on the glass. Time to be tested: approx 20 min should be enough. Thermal treatment can be repeated more times. Then you can complete the glass cleaning by a solvent, a chlorinated solvent should work well (dichlomethane, tryelin, etc).
Prior to curing of PU, we use to apply silicone releasing agent/vacuum grease to the glass to make the detachment easy..
Base bath (IPA/Water/NaOH) is preferable for cleaning glass containing PU.
Polyurethane (PUR or PU) is a polymer composed of organic units joined by carbamate or urethane links. Note that polyurethane is not a uniform class of material. The chemical resistances listed in the attachment can help.
In addition, you might only need to heat the plate to the softening point of the polymer or above glass transition temperature and then remove it.
Regards,
TD
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