Description

Caprolactone-Dimethylsiloxane-Caprolactone Block Polymer, Hydroxyl Terminated is a specialized triblock copolymer that combines the biocompatibility and hydrolyzable nature of polycaprolactone (PCL) with the flexibility, low surface energy, and thermal stability of polydimethylsiloxane (PDMS). This unique hybrid structure, terminated with reactive hydroxyl groups, matters for its ability to act as a versatile polymeric modifier, compatibilizer, and building block for advanced materials. Industries such as medical devices, personal care, coatings, and high-performance elastomers need it to enhance material properties like surface lubrication, impact resistance, and controlled biodegradation.

Application

• Biomedical Materials: As a key component in biodegradable sutures, drug delivery matrices, and tissue engineering scaffolds where controlled degradation and biocompatibility are critical.
• Personal Care & Cosmetics: Used as a film-forming agent, emollient, and texture enhancer in skincare products, sunscreens, and hair conditioners for a non-greasy, silky feel.
• Specialty Coatings & Adhesives: Functions as a surface modifier and additive to improve flexibility, abrasion resistance, and release properties in protective and pressure-sensitive coatings.
• Polymer Modification: Acts as a compatibilizer and impact modifier in polymer blends (e.g., with polyurethanes, polyesters) to tailor mechanical properties and processability.
• Elastomers & Sealants: Serves as a reactive intermediate for synthesizing silicone-organic hybrid elastomers with enhanced toughness and environmental stability.
• Lubricants & Greases: Employed as a high-performance additive in specialty lubricants to reduce friction and improve thermal stability.

Basic Information

Product Name	Caprolactone-Dimethylsiloxane-Caprolactone Block Polymer, Hydroxyl Terminated
CAS No.	120359-07-1
Molecular Formula	(C6H10O2)m-(C2H6OSi)n-(C6H10O2)p
Molecular Weight	Variable (Typically 1,000 - 10,000 g/mol). Contact for details on specific grades.
Synonyms	Poly(ε-caprolactone)-block-poly(dimethylsiloxane)-block-poly(ε-caprolactone) diol; PCL-PDMS-PCL Diol; Hydroxy-terminated PCL-PDMS-PCL Triblock Copolymer; α,ω-Dihydroxy poly(ε-caprolactone-b-dimethylsiloxane-b-ε-caprolactone); Siloxane-Caprolactone Block Copolymer Diol; PDMS-PCL Diol; Poly(DMS-co-CL) Diol; Triblock Silicone-Polyester Polyol
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure batch-to-batch consistency and compliance with customer specifications. Key parameters monitored include hydroxyl value, molecular weight distribution (GPC), block ratio (NMR), and viscosity. A Certificate of Analysis (COA) detailing these results is provided with each shipment. Production can adhere to cGMP guidelines for medical-grade applications upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at temperatures between 15-25°C (59-77°F). This material is sensitive to strong acids and organic solvents; keep away from incompatible materials. Under recommended storage conditions, the product is typically stable for 24 months from the date of manufacture.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Hydroxyl Value (mg KOH/g)	As per grade (e.g., 20 - 100)
Viscosity @ 25°C (cP)	As per grade
Molecular Weight (GPC, Mn)	As per grade
PDI (GPC)	≤ 1.5
Water Content (KF)	≤ 0.5%
Residual Monomer (GC)	≤ 0.1%

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