1,4 Butanediol

1,4 Butanediol is a non-corrosive, colorless, high boiling liquid with a low order of toxicity. 1,4 Butanediol is completely soluble in water, most alcohols, esters, ketones, glycol ethers and acetates, but may be immiscible or partially miscible in common aliphatic and aromatic/chlorinated hydrocarbons. 1,4 Butanediol is a versatile chemical intermediate because of its terminal, primary hydroxyl groups and its hydrophobic and chemical resistant nature. Polymers produced upon reaction with diacids or diisocyanates are the basis for many commercial polyurethane and polyester applications.


Chemical Name: 1,4 Butanediol
Chemical Family: C4 Chemicals
Other Names:

• 1,4-BDO

CAS No:  110-63-4
Chemical Formula:  C4H10O2


Benefits and Applications


Thermoplastic Polyesters: 1,4 Butanediol is used to manufacture polybutylene terephthalate (PBT). PBT's high strength, excellent thermal stability and good durability lead to its many uses in the automotive, electrical and appliance industries. PBT is also compatible with several other thermoplastics which enables a compounder to tailor a polymer alloy to an end user's specifications.1,4-Butanediol is a key component of thermoplastic copolyester elastomers. These elastomers rely upon 1,4 Butanediol to provide crystallinity which in turn provides elasticity and resilience to these terephthalate based polyesters.

Polyesters: In polyurethane applications, 1,4 Butanediol is primarily used as a component of polyesters or as a chain extender. For example, polyesters such as poly (butylene adipate) diols are formulated into urethane elastomers with excellent oil, chemical and UV resistance. In addition, these materials have good mechanical properties over a broad temperature range, as well as good flex and abrasion resistance. As a chain extender with MDI systems, 1,4 Butanediol provides a good balance between hardness and low temperature flexibility. On comparison to other diols 1,4 Butanediol combines the best attributes of hydroxyl reactivity, linearity and overall system compatibility to build in the proper crystallinity required in the polyurethane hard segment. Also, the 1,4 Butanediol systems provide a lower exposure hazard than MOCA/TDI systems. 1,4 Butanediol is used as a chain extender for thermoplastic urethane elastomers. 1,4 Butanediol yields crystalline urethane domains which readily melt and flow at elevated temperatures but phase separate at ambient temperatures in order to yield tough elastometric networks.Cast urethane elastomers continue to be a major end use of 1,4 Butanediol because of overall consistency and reliability.Urethane RIM elastomers using 1,4-Butanediol allow design freedom and parts consolidation with large, complex shapes. Current applications of 1,4-Butanediol based urethane elastomers include automotive front and rear end fascia, bumpers, fenders and spoilers. Non-automotive applications include footwear, electrical enclosures, recreation equipment, appliances and furniture

Polyester Plasticizers: 1,4 Butanediol based polyester plasticizers impart superior compatibility with vinyl polymers while providing non-migrating characteristics. In addition, polyesters based upon 1,4 Butanediol have excellent oxidation resistance and good low temperature flexibility. Copolyester Hot Melt and Solvent Borne Adhesives. 1,4 Butanediol is a key component of copolyesters of isophthalic acid and terephthalic acid used in hot melt adhesive applications. 1,4 Butanediol yields polyesters with excellent adhesive and cohesive strength.

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