Polyol Alkyd Resin Production Line Reactor

Polyol alkyd resin production line is specially used for producing modified alkyd resins. It realizes the transformation from vegetable oil/fatty acid to high-performance resin through alcoholysis-esterification-dilution process.

Compared with traditional alkyd resin

Indicator	Polyol alkyd resin	Ordinary alkyd resin
Drying speed	20-30% faster (more active sites)	Slower
Moisture and heat resistance	1000h without blistering	Usually 500-800h
Cost	15-20% higher (pentaerythritol is more expensive)	Lower

Main Features of Polyol Alkyd Resin Reactor

1. Corrosion-resistant reinforced design

Material: SS304/316 liner + PTFE lining (strongly corrosive environment with acid resistance ≤50mgKOH/g).
Special treatment: Hard chrome plating (hardness ≥HRC60) on the stirring shaft to prevent corrosion from acidic substances during esterification stage.

2. Precision temperature control system

Heating method: Thermal oil circulation (working temperature 50-280℃).
Temperature control accuracy: ±1.5℃ (PID intelligent adjustment, ±1℃ required in the key esterification stage).

3. Highly efficient hybrid structure

Mixing type	Function
Anchor type main propeller	Low speed (30-60rpm) pushes high-viscosity materials at the bottom of the kettle
Dispersing disc	High speed (800-1200rpm) breaks resin gel particles
Baffle	Eliminate vortices and improve mass transfer efficiency (turbulent Reynolds number Re≥10⁴)

polyol alkyd resin reactor

Problems that may arise during the production of polyol alkyd resin

1. Coking at the bottom of the kettle

Cause: Local overheating or dead corner of stirring

Solution:

Optimize the gap between the blade and the bottom of the kettle (5-10mm is recommended)
Add 0.1-0.3% anti-coking agent (such as BHT)

2. Esterification reaction stagnation

Diagnosis: Acid value > 20mgKOH/g for more than 2 hours

Solution:

Add 0.05-0.1% catalyst (stannous octoate)
Check the blockage of the distillation tower