Patent ID: 11879031
Assignee: SOLENIS TECHNOLOGIES, L.P.
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A method for the purification of a polymer solution comprising the steps of:
a) providing a polymer solution comprising water and an oxazoline polymer having a weight average molecular weight greater than about 5000 g/mol, and one or more impurities,
b) raising the temperature of the polymer solution from a first temperature to a second temperature that is above a lower critical solution temperature (LCST), wherein the polymer solution separates into a predominantly water phase and a polymer-rich phase;
c) separating the water phase from the polymer phase;
d) cooling the polymer phase to a third temperature such that a purified soluble polymer solution forms and has an amount of the one or more impurities that is less than an amount of the one or more impurities present in the polymer solution; and
e) optionally repeating steps b), c) and d).