Description

Siloxanes and Silicones, di-Me, methoxy Ph, polymers with Ph silsesquioxanes, methoxy-terminated, polymers with adipic acid, diethylene glycol, isophthalic acid and trimethylolpropane is a specialized, high-performance hybrid polymer that combines the properties of silicones with organic polyester/polyol segments. This unique architecture provides exceptional thermal stability, flexibility, and compatibility with a wide range of organic and inorganic matrices. It is primarily sought after by formulators in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for advanced composite materials, where it acts as a key modifier to enhance product durability and performance. The CAS number for this compound is 125471-99-0.

Application

• High-Performance Coatings: Used as a resin modifier in industrial, automotive, and protective coatings to improve flexibility, adhesion, and thermal/chemical resistance.
• Specialty Adhesives & Sealants: Imparts durability, weatherability, and elastic recovery in construction, aerospace, and electronic sealing applications.
• Advanced Composite Materials: Serves as a compatibilizer or additive in fiber-reinforced plastics and other composites to enhance interfacial bonding and reduce stress.
• Release Coatings and Liners: Formulated into non-stick and easy-release coatings for papers, films, and molds.
• Polymer Modification: Acts as an additive to modify the rheology, surface properties, and toughness of various engineering plastics and rubbers.
• Electronic Encapsulants: Used in potting and encapsulation compounds to protect sensitive components, offering good dielectric properties and stress relief.

Basic Information

Product Name	Siloxanes and Silicones, di-Me, methoxy Ph, polymers with Ph silsesquioxanes, methoxy-terminated, polymers with adipic acid, diethylene glycol, isophthalic acid and trimethylolpropane
CAS No.	125471-99-0
Molecular Formula	Complex Polymer Mixture (Contact for details)
Molecular Weight	Variable (Contact for details)
Synonyms	Methoxy-terminated phenyl silicone polyester copolymer; Phenyl silsesquioxane-modified silicone polyester; Silicone-polyester hybrid resin; Poly(dimethylsiloxane-co-diphenylsiloxane), methoxy-terminated, grafted with polyester; Adipic acid/diethylene glycol/isophthalic acid/trimethylolpropane copolymer with phenylsilsesquioxane siloxane; Silicone-modified alkyd resin (phenyl type); Hybrid silicone organic polymer CAS 125471-99-0
EINECS	Contact for details

Quality Control

Our production of this advanced hybrid polymer adheres to strict quality management systems. Each batch is characterized for critical parameters including viscosity, solids content, acid value, and functional group content to ensure batch-to-batch consistency and performance. Certificates of Analysis (COA) detailing these specifications are provided and available upon request, supporting your quality assurance and regulatory compliance needs.

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 material is hygroscopic (moisture-sensitive); ensure containers are sealed immediately after use to prevent absorption of atmospheric moisture, which can affect product properties.

Specification

Item	Specification
Appearance	Clear to slightly hazy viscous liquid
Color (Gardner)	≤ 3
Solids Content	70 - 80 %
Viscosity (25°C)	2000 - 8000 mPa·s
Acid Value	≤ 5 mg KOH/g
Specific Gravity (25°C)	1.05 - 1.15
Flash Point	> 100 °C
Methoxy Content	As per COA

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