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[Chemical Knowledge]：The production method and process of thermoplastic polyurethane elastomer rubber.

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of thermoplastic polyurethane elastomer rubber (TPU) Thermoplastic polyurethane elastomer rubber (TPU) is a high-performance and multi-functional chemical raw material, which is widely used in shoe materials, cables, pipes, auto parts, medical equipment and other fields. This article will introduce the manufacturing method of TPU in detail.

1. Raw Material Preparation

Manufacturing TPU needs to prepare the following raw materials:

1. Polyol: Polyester polyol or polyether polyol is usually used as a soft segment to provide elasticity.
2. Diisocyanate: Used as a hard segment to provide strength and hardness.
3. chain extender: such as ethylene glycol, glycerol, etc., used to adjust the molecular weight and hardness.
4. Catalyst: Promote the speed of polyurethane reaction.
5. Antioxidants, stabilizers and other additives: improve the weather resistance, heat resistance and other properties of TPU.

2. manufacturing process

TPU manufacturing process mainly includes the following steps:

1. ingredients: according to the predetermined formula, the polyol, diisocyanate, chain extender, catalyst and other raw materials are added to the ingredients kettle in proportion, stirring evenly.
2. polymerization reaction: the mixture in the batching kettle is transferred to the polymerization reactor, and the polymerization reaction is carried out at a certain temperature and pressure to generate polyurethane prepolymer.
3. Chain extension reaction: The prepolymer is mixed with the chain extender, and the chain extension reaction is carried out at a certain temperature and time to produce a high molecular weight TPU.
4. Post-treatment: The generated TPU is subjected to post-treatment such as cooling, pelletizing and drying to obtain finished TPU particles.

3. precautions

In the TPU manufacturing process, you need to pay attention to the following matters:

1. Control the quality of raw materials: Ensure the purity and quality of raw materials to avoid adverse effects on the performance of TPU.
2. Control reaction conditions: The temperature, pressure, time and other parameters of the polymerization reaction and the chain extension reaction need to be strictly controlled to ensure that the molecular structure and performance of the TPU meet the requirements.
3. Prevent moisture from entering: Moisture will have a negative impact on the polyurethane reaction, so it is necessary to strictly prevent moisture from entering during the manufacturing process.
4. post-treatment process: cooling, pelletizing, drying and other post-treatment processes need to be reasonably controlled to ensure the quality and performance of TPU particles.

In short, the manufacturing method of thermoplastic polyurethane elastomer rubber requires strict control of factors such as the quality of raw materials, reaction conditions and post-treatment processes to ensure product quality and performance. At the same time, it is necessary to continuously study and explore new manufacturing technologies and methods to improve the performance and application range of TPU.

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