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What is it? |
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| 1.4 BDO (Butanediol 1,4) |
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| 1.4 BDO is used in both the hard and soft segments of Polyurethanes, in the hard segment as a chain extender and in the soft segment as polyesterdioles such as polybutylene adipate glycol. |
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| Butanediol is used to make a variety of esters, including monomeric plasticizers, the engineering plastic polybutylene terephtalate (PBT) and low molecular weight polyester glycols. The polyester glycols are used as soft segments in polyurethanes and are made by reacting butanediol with various dibasic acids such as adipic and sebacic acid. |
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| Polyesters such as poly (butylene adipate) glycol yield urethanes with the excellent resistance to oils and solvents and to ultraviolet light. These urethanes have also very good mechanical properties at room and elevated temperatures as well as high resistance to flexing and abrasion. Urethanes made from polyester glycols are quite polar and show generally better metal adhesion than those derived from polyethers. |
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| In addition to its use in the soft segments of polyurthanes, butanediol is used in the hard segments of some polyurethanes, particularly those made with MDI. In the hard segment or as a crosslinker, butanediol produces a good balance between hardness and low temperature flexibility. |
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