1,6-Diisocyanato-5,6-dimethylheptane(CAS: 28679-16-5)

1,6-Diisocyanato-5,6-dimethylheptane is a colorless to pale yellow liquid with a molecular weight of approximately 240.29 g/mol. It is moderately soluble in common organic solvents such as ethanol and acetone but insoluble in water. The compound is highly reactive due to the presence of isocyanate groups, making it suitable for polymer synthesis. It has a pungent odor and is flammable.

1,6-Diisocyanato-5,6-dimethylheptane can be synthesized via the reaction of diphenylmethane diisocyanate (MDI) with dimethylheptanedioic anhydride. The synthesis typically involves the stepwise introduction of isocyanate groups to the unsaturated hydrocarbon, followed by a condensation reaction. Common catalysts include tertiary amines, and the process yields a high purity product with excellent selectivity.

1,6-Diisocyanato-5,6-dimethylheptane is primarily used in the chemical industry, particularly in the production of polyurethane prepolymers. It finds applications in the manufacture of flexible foams, coatings, adhesives, and elastomers. Additionally, it is used in the production of specialty polymers and as a monomer for various functional materials, including those for sensors and semiconductors.

When handling 1,6-Diisocyanato-5,6-dimethylheptane, it is important to wear appropriate personal protective equipment (PPE) such as gloves, goggles, and a respirator to prevent skin and respiratory exposure. Work should be conducted in a well-ventilated area or fume hood. Spills should be immediately contained and cleaned up with appropriate absorbent materials. Always refer to the Safety Data Sheet (SDS) for detailed handling and emergency procedures.