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1.4-Butanediol(BDO)
Jan 14, 2018

1,4-butanediol (BDO/1,4-BD) is a versatile liquid diol intermediate with reactive primary hydroxyl functionality and a linear structure that lends itself to formulating polyurethanes with a good balance of hardness and low temperature flexibility; high strength and durability; and thermal stability. 

1,4-butanediol(BDO) is characterized by…

  • A molecular weight (MW) of 90.12. 

  • An equivalent weight (EW) of 45.06.

  • And a hydroxyl value of 1245 mg KOH/g.  

  • A melting point of 20.1°C (68.2℉)

  • A boiling point of 235°C (455℉)

  • A flash point of 121°C (250℉)

While 1,4-BDO has a number of uses as a polymer intermediate, BDO plays a key role in the creation of polyurethanes, with urethane grade BDO being particularly advantageous because of its low moisture content (< 150 ppm moisture specification) and very high purity (> 99.85 % purity by gc).

1. 1.4-Butanediol(BDO) plays as a polyurethane building block

2. 1.4-Butanediol(BDO) playes as a chain extender

3. The polyurethane application of 1.4-Butanediol(BDO)

Because of BDO’s consistency, durability, and other performance attributes, end-use applications for 1,4-butanediol in polyurethanes are wide ranging, both as a chain extender and in polyester polyols.

The main polyurethanes produced using BDO are solid and cellular elastomers.  Applications include a vast array of performance cast urethane parts, such as...

  • Wheels, rollers, and belts.  

  • Recreational equipment. 

  • Pipe linings and pipeline products. 

  • Pump liners and parts. 

  • Hydrocyclones.

  • Conveyor belts.  

Other applications include…

  • High-performance adhesives, sealants, and coatings.

  • RIM and TPU parts.

  • Automotive components. 

  • Appliance parts. 

  • Footwear.

Polyurethanes based on BDO systems perform well in aggressive environments—for example, exposures in mining, mineral, and oil field operations and in medical devices.

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