Process for the continuous production of polyisocyanate
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsKazurou Komatsu, Sojiro Matsumoto, Takeshi Maniwa, Nobuyuki Shinmura
Life of this patent
Estimating the term…
Abstract
A process for the continuous production of a polyisocyanate by reacting an organic diisocyanate with an adduct-producing agent that reacts with an isocyanato group to form an intermediate product having a urea bond and a gas is disclosed wherein the initial stage of the reaction is performed in one or two continuous complete mixing type reactors until the amount of gas generated is at least about 80% of the amount of gas to be generated during the entire reaction and the subsequent stage of the reaction is performed in a plug flow reactor.
Claims13
A process for the continuous production of a polyisocyanate by reacting an organic diisocyanate with an adduct-producing agent that reacts with an isocyanate group to form an intermediate product having a urea bond and a gas, the initial stage of the reaction being performed in one or two continuous complete mixing type reactors until the amount of gas generated is at least about 80% of the amount of gas to be generated during the entire reaction, and the subsequent stage of the reaction is performed in a plug flow type reactor.
Dependencies are inferred from the claim text.