Description

Siloxanes And Silicones, Di-Me, Hydroxymethyl Group-Terminated, Polymers With Diethylene Glycol, Tdi And Trimethylolpropane is a specialized polyurethane-modified silicone copolymer, identified by CAS No. 125048-50-2. This engineered material is valued for its unique combination of silicone's flexibility and release properties with the toughness and adhesion of polyurethane chemistry. It serves as a critical performance additive and reactive intermediate for formulators seeking to enhance the surface properties, durability, and processing characteristics of high-performance coatings, adhesives, sealants, and elastomers.

Application

• High-Performance Coatings: Used as a flow control, leveling, and anti-cratering additive to improve surface slip and mar resistance in industrial, automotive, and wood coatings.
• Adhesives & Sealants: Acts as a reactive modifier to enhance flexibility, moisture resistance, and adhesion to low-surface-energy substrates like plastics and treated metals.
• Release Coatings: Serves as a key component in formulating durable, non-stick release liners for pressure-sensitive adhesives and composite molding processes.
• Elastomer Modification: Incorporated into polyurethane (PU) or silicone elastomer systems to tailor mechanical properties such as tensile strength, elongation, and tear resistance.
• Fiber & Textile Treatment: Applied as a softener and water-repellent finish, providing a durable, smooth hand feel to technical textiles and fibers.
• Mold Making: Utilized in formulations for flexible molds due to its excellent release properties and ability to capture fine detail.

Basic Information

Product Name	Siloxanes And Silicones, Di-Me, Hydroxymethyl Group-Terminated, Polymers With Diethylene Glycol, Tdi And Trimethylolpropane
CAS No.	125048-50-2
Molecular Formula	Contact for details
Molecular Weight	Varies (Polymer)
Synonyms	Hydroxymethyl-terminated dimethyl siloxane-TDI-trimethylolpropane copolymer; Polyurethane-modified silicone; Silicone-urethane copolymer; TDI-trimethylolpropane adduct with hydroxymethyl-terminated PDMS and diethylene glycol; PU-modified polysiloxane; Reactive silicone polyol; Siloxane-polyurethane hybrid polymer; Organomodified silicone
EINECS	Contact for details

Quality Control

Our production of this advanced copolymer adheres to strict quality management systems. Each batch is characterized for critical parameters including hydroxyl value, viscosity, silicone content, and isocyanate (NCO) equivalent weight to ensure consistent performance. Certificates of Analysis (COA) detailing these specifications are provided with every shipment. We support compliance with relevant global regulatory frameworks for industrial chemicals.

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/59-77°F). This product is hygroscopic (moisture-sensitive); containers must be kept sealed to prevent absorption of atmospheric moisture, which can affect reactivity and properties. Keep away from heat sources and open flame.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
Viscosity (25°C)	Contact for details
Hydroxyl Value (mg KOH/g)	Contact for details
Non-Volatile Matter (%)	≥ 98.0
Specific Gravity (25°C)	Contact for details
Flash Point	> 150 °C

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