Patent ID: 8668845

Claim:
A method for preparing an electrostatic dissipative polymer, comprising the step of polymerizing polyethyleneglycol, diisocyanate, and a chain extender, resulting in the electrostatic dissipative polymer, where the polymerizing reaction takes place in the presence of a reactive solvent and where a lithium salt is dissolved in the reactive solvent, wherein the amount of the reactive solvent is from 0.1 to 20 weight parts based on 100 weight parts of the produced electrostatic dissipative polymer, the amount of lithium salt is from 0.1 to 5 weight parts based on 100 weight parts of the produced electrostatic dissipative polymer, and wherein the reactive solvent consists essentially of an aliphatic glycol having from 2 to 8 carbon atoms and having a primary alcohol group, or an aromatic glycol having from 6 to 10 carbon atoms; wherein the electrostatic dissipative polymer is polyurethane.