Description

Poly(Caprolactone) Triol is a low molecular weight, hydroxyl-terminated polyester derived from caprolactone, characterized by its terminal primary hydroxyl groups and a flexible, aliphatic polyester backbone. This structure matters for formulators seeking to enhance the flexibility, hydrolytic stability, and low-temperature performance of polyurethane systems, coatings, and adhesives. It is a critical raw material needed by manufacturers in the polyurethane elastomer, sealant, adhesive, and specialty coating industries to produce high-performance, durable end-products.

Application

• Polyurethane Elastomers: Used as a soft segment component to impart excellent flexibility, resilience, and toughness to cast elastomers, thermoplastic polyurethanes (TPU), and microcellular foams.
• Adhesives & Sealants: Serves as a key polyol in moisture-cure and two-component polyurethane formulations, contributing to strong adhesion, elongation, and durability.
• Coatings: Incorporated into high-performance polyurethane coatings for textiles, plastics, and metals to improve impact resistance, abrasion resistance, and low-temperature flexibility.
• Resin Modification: Acts as a reactive modifier or plasticizer for other polymer systems, such as epoxies or acrylics, to reduce brittleness and internal stress.
• Biomedical & 3D Printing: Utilized in the synthesis of biodegradable polymers and as a component in resin formulations for advanced 3D printing applications, including stereolithography (SLA).

Basic Information

Product Name	Poly(Caprolactone) Triol
CAS No.	69521-90-0
Molecular Formula	Typically (C6H10O2)n•C3H8O3
Molecular Weight	Variable (300 - 3000 g/mol typical)
Synonyms	Polycaprolactone Triol; PCL Triol; ε-Caprolactone Triol; Trihydroxy-Terminated Polycaprolactone; Poly(oxy-1-oxo-1,6-hexanediyl), α,α',α''-1,2,3-propanetriyltris[ω-hydroxy-; CAPA 3050 (Trade Name); Tone 0305 (Trade Name); Tri-functional Polycaprolactone Polyol
EINECS	Contact for details

Quality Control

Our Poly(Caprolactone) Triol is manufactured under a strict quality management system. Each batch undergoes comprehensive analysis to ensure consistency in hydroxyl value, acid value, viscosity, and water content, meeting the precise requirements of polyurethane chemistry. Certificates of Analysis (COA) detailing all relevant specifications are provided and available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). To prevent moisture absorption and potential property changes, containers must be kept tightly sealed when not in use. For long-term storage, consider using an inert gas blanket (e.g., nitrogen).

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Hydroxyl Value (mg KOH/g)	Contact for details
Acid Value (mg KOH/g)	≤ 1.0
Water Content (%)	≤ 0.1
Viscosity @ 25°C (cP)	Contact for details
Functionality	~3
Identification (IR)	Conforms

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.