Details Of Polyester Polyol Production Line

What is polyester polyol?

Polyester polyol is an important class of polyurethane raw materials, primarily used in the production of flexible and rigid foams, elastomers, coatings, adhesives and sealants. It is polymers containing hydroxyl groups (-OH) produced through the polycondensation reaction of dibasic (or polybasic) acids and polyols.

Polyester Polyol Preparation Principle

• Acids and alcohols undergo high-temperature polycondensation in a reactor, followed by dehydration to form ester bonds.
• Controlling reactio conditions (temperature, pressure and molar ratio) yields polyester polyols with the appropriate molecular weight and desired hydroxyl content.

Polyester Polyol Production Line Equipment

1. Esterification reactor / High-temperature and high-pressure reactor: Equipped with a jacket or external coil, heated by thermal oil or steam. Built-in powerful agitator to ensure uniform reaction.
2. Vacuum system: High-efficiency vacuum pump unit ensures smooth polycondensation reaction and increases molecular weight.
3. Condensation and separation unit: Condenses and separates reaction by-product water in a timely manner.
4. Filtration and refining system: Removes impurities and improves product purity.

Technical Advantages of Polyester Polyol Production Line

• High efficiency and energy saving: Reactor is rationally designed, offering high heat exchange efficiency and low energy consumption.
• High stability: Vacuum polycondensation system ensures uniform and controllable molecular weight.
• High automation (optional): Fully automated feeding, monitoring, and data collection reduce manual intervention.
• Excellent product quality: Low impurities, light color, and low acid value, making it suitable for the production of high-end polyurethane materials.
• Flexibility: Customizable continuous or batch production lines based on customer needs.

The key to polyester polyol production is to precisely control the acid-to-alcohol ratio, reaction temperature, and vacuum system, promptly remove by-product moisture, ensur that the hydroxyl value and acid value meet the standards, and at the same time ensure equipment safety and process stability.

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