Reaction kettle for preparing migration-heat-resistant thermoplastic polyurethane elastomer

Abstract

The invention discloses a reaction kettle for preparing a migration-heat-resistant thermoplastic polyurethane elastomer. The reaction kettle comprises a kettle body, wherein a feeding hole, a stirringmotor emptying tube and a thermometer are arranged at the top of the kettle body; a sealing cover is screwed at the top of the feeding hole; a stirring shaft is arranged at the bottom of the stirringmotor; stirring paddles are arranged on the outer wall of the stirring shaft; a support plate is arranged at the top of the right side wall of the kettle body; a vacuum pump is arranged at the top ofthe support plate; an exhaust tube is arranged on the gas inlet tube on the left side of the vacuum pump; the outer wall of the kettle body is sleeved by a jacket; an oil inlet tube is arranged at the top of the left side wall of the jacket; an oil outlet tube is arranged at the bottom of the jacket; an overflowing tube is arranged on the right side wall of the jacket; a discharge tube is arranged at the bottom of the kettle body; a nitrogen tank is arranged on the left side of the kettle body; and a nitrogen tube is arranged at the gas outlet end of the top of the nitrogen tank. By adoptingthe reaction kettle, the temperature of materials inside the kettle body can be controlled through the flowing speed of hot oil, in addition, nitrogen is added while reactions are completed, the balance of air pressure inside and outside the kettle body can be maintained, and a product can be prevented from oxygen oxidation.

Description

technical field [0001] The invention relates to the technical field of production equipment for thermoplastic polyurethane elastomers, in particular to a standby reaction kettle for anti-migration thermoplastic polyurethane elastomers. Background technique [0002] Migration-resistant thermoplastic polyurethane elastomer is a type of thermoplastic polyurethane elastomer rubber (TPU) that is used in a variety of applications. In the preparation process, it is necessary to add polyester polyol raw materials into the reaction kettle, cooperate with suitable auxiliary reagents such as antioxidants and catalysts, and carry out chemical reactions at a temperature of 100-200 ° C and an internal pressure of about 0.1 MPa. , and obtained after a period of heat preservation. After the reaction in the reactor is completed, before the product is discharged from the reactor, it will be dangerous to discharge the product directly due to the low pressure in the reactor. Therefore, we prop...

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Problems solved by technology

After the reaction in the reactor is completed, before the product is discharged from the reactor, due to the low pressure in the reactor, it will be dangerous to discharge the product directly. Therefore, we propose an anti-migration thermoplastic polyurethane elastomer standby reactor

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