Rinsing Circuits • Inerting during an extended shutdown • Rinsing of circuits including isocyanate circuits • OECD biodegradable Polyurethane resins are also called carbamate resins. This category includes all compounds produced by the reaction of an isocyanate with an alcohol: short-chain or long-chain diols or polyols. They can be obtained by polycondensation or polyaddition. Polyurethanes