Poly(caprolactone) diol Cas 36890-68-3

Polyurethane Elastomers (TPU): Uses PCL diol as the soft-segment raw material to produce TPU with excellent low-temperature resistance, wear resistance, and hydrolysis resistance; applications include automotive seals, hydraulic hoses, industrial rollers, medical elastic tubing, ski boots, and synthetic leather.
Polyurethane Coatings, Wood Finishes, and Industrial Anti-corrosion Topcoats: Used to formulate two-component PU clear coats and pigmented paints; the resulting films are flexible, exhibit strong adhesion, and offer weather resistance without yellowing, making them suitable for wood, metal, and plastic substrates; also serves as an active diluent component in high-solids coatings to enhance film fullness and crack resistance.
Polyurethane Adhesives and Sealants: Used in laminating adhesives, footwear adhesives, and electronic potting/sealing compounds; bonds materials such as PET, PVC, metal, and wood, offering water and oil resistance as well as low shrinkage.
Biodegradable Medical Polyurethanes: Used for soft-tissue repair scaffolds for surgical implantation, artificial blood vessels, and wound dressings; the material is biocompatible and undergoes gradual degradation, eliminating the need for a second surgery for removal.
Toughening Modifiers for Epoxy and Acrylic Resins: Added to epoxy resin, unsaturated polyester, and acrylic systems to reduce brittleness and improve impact resistance and resistance to low-temperature cracking; specialized toughening agents for electronic potting epoxies and carbon fiber composites.
Leather and Textile Auxiliaries: Used as surface-layer polyurethane resins for high-end synthetic leather to provide a fine, soft touch and flex resistance; also used in waterproof, breathable textile coatings to enhance fabric tear strength and low-temperature flexibility.