KT HER-L Aromatic diol chain extender
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Product Description
Product Details
Introduction
KT HER-L is a mixture of meta-substituted phenyl ether diols with 3-hydroxyethyloxyethyl-1-hydroxyethyl phenyl diether as the main component, and is a homologue of HER. Due to the components with asymmetric molecular structure, the chain extender is normally a viscous liquid, commonly known as liquid HER (HER-L).
KT HER-L has slightly poor fluidity in low temperature environment in winter, and its viscosity decreases after warming to 25°C, making it easy to operate. This product is suitable for elastic polyurethane products with medium hardness. Compared with HER, which is solid at room temperature, KT HER-L is easy to use, and the prepared polyurethane elastomer has the characteristics of higher elongation and excellent flexural properties. Compared with aliphatic diol chain extenders such as 1,4-butanediol, the elastomer prepared by KT HER-L as a chain extender has good heat resistance.
Physical indicators
| Item | Index |
| Appearance | Light yellow to yellow transparent liquid |
| Total amount of phenyl ether glycol (GC)/% | ≥96.0 |
| Hydroxy value/(mgKOH/g) | 460±15 |
| Water/% ≤0.10 | ≤0.10 |
| Viscosity (50℃)/mPa·s | 120±20 |
| Density (25℃)/(g/cm3) | ~1.19 |
| Solubility | Soluble in most organic solvents, soluble in water |
Application
KT HER-L is suitable for polyurethane systems such as TDI and MDI, and can be widely used in polyurethane elastomers (casting type, thermoplastic, mixing type), polyurethane adhesives, sealing materials, coatings, foam plastics, spandex, sports field paving materials and other fields.
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