Description

Siloxanes And Silicones, Di-Me, Hydroxy-Terminated, Propoxylated, Polymers With 5-Isocyanato-1-(Isocyanatomethyl)-1,3,3-Trimethylcyclohexane CAS NO 190793-17-0 is a specialized polyurethane prepolymer based on a propoxylated, hydroxy-terminated polydimethylsiloxane (PDMS) backbone reacted with isophorone diisocyanate (IPDI). This hybrid material is engineered to combine the exceptional surface properties, flexibility, and thermal stability of silicones with the toughness and adhesion characteristics of polyurethanes. It is primarily utilized by formulators in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to develop high-performance, durable products with enhanced weatherability and low surface energy.

Application

• High-Performance Coatings: Used as a key component in formulating weather-resistant, anti-graffiti, and release coatings that require excellent flexibility and adhesion to various substrates.
• Specialty Adhesives & Sealants: Serves as a prepolymer for creating flexible, moisture-curing adhesives and sealants with strong bonding to plastics, metals, and glass, even under thermal cycling.
• Advanced Elastomers: Employed in the synthesis of silicone-urethane hybrid elastomers (SPUs) for applications demanding a unique balance of mechanical strength, biocompatibility, and low-temperature flexibility.
• Fiber & Textile Treatments: Acts as a modifying agent to impart durable softness, water repellency, and improved handle to technical textiles and fibers.
• Release Liners & Papers: Formulated into release coatings for labels, tapes, and industrial liners, offering controlled release force and stability.
• Potting & Encapsulation: Provides protective, flexible encapsulation for sensitive electronic components, offering resistance to moisture and environmental stress.

Basic Information

Item	Details
Product Name	Siloxanes And Silicones, Di-Me, Hydroxy-Terminated, Propoxylated, Polymers With 5-Isocyanato-1-(Isocyanatomethyl)-1,3,3-Trimethylcyclohexane
CAS No.	190793-17-0
Molecular Formula	Contact for details (Polymeric substance)
Molecular Weight	Contact for details (Varies by grade and chain length)
Synonyms	Poly[oxy(dimethylsilylene)], α-hydro-ω-hydroxy-, propoxylated, polymer with 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylcyclohexane; IPDI-terminated propoxylated hydroxy-terminated PDMS; Silicone-urethane prepolymer; IPDI-PPG-PDMS prepolymer; Poly(dimethylsiloxane), hydroxypropyl terminated, reacted with isophorone diisocyanate; Hydroxypropyl-terminated polydimethylsiloxane-IPDI adduct; SPU prepolymer (Silicone Polyurethane)
EINECS	Contact for details

Quality Control

Our production of this advanced silicone-urethane prepolymer adheres to strict quality management protocols. Each batch is characterized for critical parameters including NCO content, viscosity, hydroxyl value, and residual monomer levels to ensure consistent performance in downstream formulations. Certificates of Analysis (COA) detailing these specifications are provided with every shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at room temperature (typically 15-25°C). Containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and premature reaction.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
NCO Content	Contact for details
Viscosity (25°C)	Contact for details
Hydroxyl Value (mg KOH/g)	Contact for details
Specific Gravity (25°C)	Contact for details
Residual IPDI Monomer	< 0.5% (by HPLC)
Moisture Content	< 0.05% (by Karl Fischer titration)

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