Description

Siloxanes And Silicones, Di-Me, Di-Ph, Polymers With Ph Silsesquioxanes, Methoxy-Terminated, Polymers With Adipic Acid, Isophthalic Acid And Trimethylolpropane CAS NO 129893-12-5 is a specialized, high-performance hybrid polymer that combines the thermal stability and flexibility of silicones with the structural integrity and adhesion properties of organic polyester components. This unique chemistry matters for formulators seeking to enhance the durability, weatherability, and mechanical performance of coatings, adhesives, and sealants. It is particularly needed by industries focused on advanced protective coatings, high-temperature resistant composites, and specialty elastomers where traditional materials fall short.

Application

• High-Performance Protective Coatings: Used as a resin modifier or primary binder in industrial, marine, and automotive coatings to improve corrosion resistance, gloss retention, and UV stability.
• Specialty Adhesives & Sealants: Serves as a key component in formulations requiring excellent adhesion to diverse substrates (metals, glass, plastics) and flexibility over a wide temperature range.
• Thermal Management Materials: Incorporated into potting compounds, encapsulants, and thermal interface materials for electronics, leveraging its thermal stability and electrical insulation properties.
• Advanced Composite Matrices: Utilized in the production of fiber-reinforced composites for aerospace and automotive applications, enhancing toughness and heat resistance.
• Release Coatings & Molding Agents: Applied in manufacturing processes for rubber, plastics, and polyurethane foams due to its excellent surface release characteristics.
• Weather-Resistant Elastomers: Formulated into silicone-modified organic polymers (SMP) for gaskets, seals, and profiles that must withstand harsh environmental conditions.

Basic Information

Item	Details
Product Name	Siloxanes And Silicones, Di-Me, Di-Ph, Polymers With Ph Silsesquioxanes, Methoxy-Terminated, Polymers With Adipic Acid, Isophthalic Acid And Trimethylolpropane
CAS No.	129893-12-5
Molecular Formula	Complex Polymer (Contact for details)
Molecular Weight	Variable (Polymer)
Synonyms	Methoxy-Terminated Phenylmethylsiloxane-Diphenylsiloxane Copolymer; Poly(dimethylsiloxane-co-diphenylsiloxane), methoxy-terminated, polymer with adipic acid, isophthalic acid and trimethylolpropane; Silicone polyester hybrid resin; Phenylmethyl polysiloxane polyester copolymer; SMP Resin (Silicone Modified Polyester); Siloxane-modified alkyd resin; High-temperature silicone polyester; Aromatic silicone polyester copolymer.
EINECS	Contact for details

Quality Control

Our production of this advanced hybrid polymer adheres to rigorous quality testing protocols to ensure batch-to-batch consistency and performance reliability. While specifications vary by grade, typical quality parameters monitored include viscosity, solids content, acid value, and functional group content. Certificates of Analysis (COA) documenting these and other critical parameters are available upon request to support 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 product is hygroscopic (moisture-sensitive). Ensure containers are sealed immediately after use to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Clear to slightly hazy viscous liquid
Solids Content	Contact for details
Viscosity (25°C)	Contact for details
Acid Value	Contact for details
Color (Gardner)	≤ 3
Specific Gravity (25°C)	1.05 - 1.15
Methoxy Content	Contact for details

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