Description

Siloxanes and Silicones, di-Me, methoxy Ph, polymers with Ph silsesquioxanes, methoxy-terminated, polymers with adipic acid, cyclohexanedimethanol, isophthalic acid and trimethylolpropane CAS NO 125471-87-6 is a specialized hybrid polymer that combines the thermal stability and flexibility of silicones with the structural strength and adhesion properties of organic polyester/polyol components. This unique chemistry matters for formulators seeking to enhance material performance in demanding environments where standard polymers may fail. It is primarily needed by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for advanced composite materials requiring tailored surface properties and durability.

Application

• High-Performance Coatings: Used as a resin modifier or primary binder in industrial, automotive, and protective coatings to improve weatherability, chemical resistance, and adhesion to diverse substrates.
• Specialty Adhesives & Sealants: Serves as a key component in formulations requiring excellent flexibility, thermal stability, and moisture resistance, ideal for construction and aerospace applications.
• Engineered Elastomers: Imparts enhanced mechanical properties and environmental resistance to silicone-polyester hybrid elastomers for gaskets, seals, and molded parts.
• Composite Materials: Acts as a coupling agent or matrix resin in fiber-reinforced composites to improve interfacial bonding and overall composite performance.
• Release Coatings: Formulated into non-stick and easy-release coatings for industrial molding processes, leveraging its silicone character.
• Electronic Encapsulants: Provides protective potting and encapsulation for electronic components, offering a balance of electrical insulation and mechanical protection.

Basic Information

Product Name	Siloxanes and Silicones, di-Me, methoxy Ph, polymers with Ph silsesquioxanes, methoxy-terminated, polymers with adipic acid, cyclohexanedimethanol, isophthalic acid and trimethylolpropane
CAS No.	125471-87-6
Molecular Formula	Complex Polymer Mixture
Molecular Weight	Variable (Polymer)
Synonyms	Silicone polyester hybrid resin; Methoxy-terminated phenyl siloxane copolymer; Poly(siloxane-co-polyester); Phenyl silsesquioxane polyester copolymer; Silicone-modified polyester resin; Poly(cyclohexanedimethanol isophthalate adipate trimethylolpropane) co-poly(phenylmethylsiloxane); Hybrid silicone-organic polymer; CAS 125471-87-6
EINECS	Contact for details

Quality Control

Our production of this advanced hybrid polymer adheres to strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistency in key parameters such as viscosity, solids content, functional group content, and thermal properties. Certificates of Analysis (COA) detailing these specifications are available upon request, supporting compliance with relevant industry and customer-specific requirements.

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). Ensure containers are kept tightly sealed when not in use to prevent moisture absorption, which may affect product properties.

Specification

Item	Specification
Appearance	Viscous liquid to solid
Color	Colorless to pale yellow
Solids Content	Contact for details
Viscosity (25°C)	Contact for details
Specific Gravity (25°C)	Contact for details
Methoxy Content	Contact for details
Acid Value	Contact for details
Hydroxyl Value	Contact for details

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