Description

Poly(2-Acetoxyethylsilsesquioxane) is a specialized organosilicon polymer featuring a hybrid organic-inorganic silsesquioxane cage structure functionalized with acetoxyethyl groups. This unique architecture provides exceptional thermal stability, chemical resistance, and compatibility with various polymer matrices, making it a valuable functional additive and precursor material. It is primarily sought by manufacturers in the advanced materials, electronics, and specialty coatings sectors for developing high-performance composites, dielectric layers, and surface modification agents.

Application

• Advanced Polymer Composites: Used as a cross-linking agent or reinforcing filler to enhance thermal stability and mechanical properties of high-temperature engineering plastics.
• Electronic Encapsulants & Dielectrics: Serves as a key component in formulations for semiconductor encapsulation, underfills, and low-k dielectric materials due to its excellent insulating properties.
• Specialty Protective Coatings: Imparts superior chemical resistance, adhesion, and durability in high-performance coatings for automotive, aerospace, and industrial equipment.
• Surface Modification & Adhesion Promotion: Acts as a coupling agent or surface treatment to improve the bond between inorganic substrates (glass, metals) and organic polymers.
• Hybrid Material Synthesis: Employed as a versatile precursor for synthesizing novel organic-inorganic hybrid (OIH) materials via sol-gel processes.
• Release Coatings & Molding Agents: Utilized in formulations for non-stick release coatings and precision molding applications where high thermal resistance is required.

Basic Information

Product Name	Poly(2-Acetoxyethylsilsesquioxane)
CAS No.	349656-50-4
Molecular Formula	(C4H8O3Si)n
Molecular Weight	Variable (Polymer)
Synonyms	2-Acetoxyethylsilsesquioxane polymer; Poly[(2-acetoxyethyl)silsesquioxane]; Acetoxyethyl POSS; Polyhedral Oligomeric Silsesquioxane with acetoxyethyl functional groups; Acetoxyethyl-functionalized POSS; T8-(2-Acetoxyethyl)silsesquioxane polymer; Hybrid silica-acetoxyethyl polymer
EINECS	Contact for details

Quality Control

Our Poly(2-Acetoxyethylsilsesquioxane) is manufactured under controlled conditions to ensure batch-to-batch consistency. Quality is verified through a suite of analytical techniques including FT-IR, NMR, GPC, and thermal analysis. A Certificate of Analysis (COA) detailing purity, molecular weight distribution, and functional group content is provided with each shipment to support your quality assurance protocols.

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 moisture-sensitive (hygroscopic); keep the container tightly sealed when not in use to prevent degradation from atmospheric humidity.

Specification

Item	Specification
Appearance	White to off-white powder or viscous liquid
Identification (IR)	Conforms to structure
Assay (Si Content)	≥ 95%
Molecular Weight (GPC, Mn)	Specified per grade
Residual Solvent	< 0.5%
Thermal Decomposition Onset (TGA)	> 250°C

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