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US 12,612,485 B2Granted
Continuous production of polyurethane prepolymers
AssigneeBASF SE
InventorsDaniela Bodmann, Carsten Hinke, Nadine Schliebe, Jan-Michael Dreisoerner, Henning Wettach, Hendrik Wagner, Julio Albuerne, Florian Puch
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Abstract
Described herein is a continuous process for producing polyurethane prepolymers in a residence time reactor with plug flow. Also described herein is a method of using these prepolymers for producing polyurethanes.
Claims8
A learning continuous process for producing polyurethane prepolymers, the process comprising:
- reacting
- a) di- or polyisocyanates;
- b) compounds having isocyanate-reactive hydrogen atoms;
- and
- c) optionally catalysts, additives, auxiliary and/or added substances
- in a residence time reactor with plug flow;
- during said reacting, periodically or continuously checking the value of at least one physical property of a product leaving the residence time reactor;
- comparing the value of the at least one physical property with a predetermined target value of the at least one physical property that is stored and retrievable in a database;
- in response to detecting a deviation from the predetermined target value, automatically applying optimization algorithms to calculate optimized parameters of a temperature and/or a flow rate of the reactants entering the residence time reactor and/or a flow rate through the residence time reactor and/or a temperature of the residence time reactor;
- and
- automatically adapting said reacting to apply the optimized parameters for the temperature and/or flow rate of the reactants entering the residence time reactor and/or the flow rate through the residence time reactor and/or the temperature of the residence time reactor.
8 more elements
Dependencies are inferred from the claim text.