Description

Siloxanes and Silicones, di-Me, polymers with Ph silsesquioxanes, methoxy- and (trimethylsilyl)oxy-terminated, polymers with adipic acid, ethylene glycol, isophthalic acid and trimethylolpropane is a specialized hybrid polymer that combines the thermal stability and flexibility of silicones with the structural integrity and compatibility of organic polyester components. This engineered material is valued for its ability to act as a high-performance additive or resin modifier, enhancing key properties in demanding formulations. It is primarily sought by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for advanced composite materials requiring tailored surface characteristics and durability.

Application

• High-Performance Coatings: Used as a resin modifier to improve weatherability, thermal resistance, and surface smoothness in industrial, automotive, and protective coatings.
• Specialty Adhesives & Sealants: Imparts flexibility, adhesion to diverse substrates, and long-term durability in construction and automotive sealants and high-bond adhesives.
• Advanced Composite Materials: Serves as a compatibilizer or additive to enhance interfacial bonding between organic resins and inorganic fillers or fibers.
• Release Coatings and Liners: Utilized in formulations for non-stick papers, films, and mold release agents due to its silicone-derived surface properties.
• Elastomer Modification: Incorporated into silicone or organic rubber formulations to modify hardness, tensile strength, and processing characteristics.
• Electronic Encapsulants: Potential use in protective potting compounds where a balance of flexibility, insulation, and environmental resistance is required.

Basic Information

Product Name	Siloxanes and Silicones, di-Me, polymers with Ph silsesquioxanes, methoxy- and (trimethylsilyl)oxy-terminated, polymers with adipic acid, ethylene glycol, isophthalic acid and trimethylolpropane
CAS No.	202352-14-5
Molecular Formula	Complex Polymer Mixture
Molecular Weight	Variable (Polymer)
Synonyms	Poly(siloxane-co-polyester) hybrid resin; Phenyl silsesquioxane modified silicone polyester; Methoxy-terminated silicone polyester copolymer; TMS-terminated silicone-organic hybrid polymer; Silicone-polyester resin; Adipic acid/ethylene glycol/isophthalic acid/trimethylolpropane copolymer with silicone; Hybrid silicone alkyd resin; CAS 202352-14-5
EINECS	Contact for details

Quality Control

Our production of this hybrid polymer adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Quality is verified through a suite of analytical tests including viscosity, solids content, hydroxyl value, acid value, and infrared spectroscopy (IR) for structural confirmation. We operate under a cGMP-compliant quality system where applicable, and a comprehensive Certificate of Analysis (COA) detailing all relevant specifications is provided with every shipment.

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). Ensure containers are sealed immediately after use to prevent moisture absorption, which can affect product properties.

Specification

Item	Specification
Appearance	Clear to slightly hazy viscous liquid
Color (Gardner)	≤ 4
Solids Content	70 - 80 %
Viscosity (25°C)	2000 - 8000 mPa·s
Acid Value	≤ 5.0 mg KOH/g
Hydroxyl Value	50 - 120 mg KOH/g
Identification (IR)	Conforms to reference spectrum

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