Description

Poly[(Octadecyldimethylammoniumchloride)Propylsilsesquioxane] is a hybrid organosilicon polymer that combines the structural stability of a silsesquioxane cage with the antimicrobial and surface-active properties of a quaternary ammonium salt. This unique architecture makes it a highly effective functional additive for creating durable, long-lasting protective coatings and materials. It is primarily sought after by manufacturers in the advanced materials, specialty coatings, and polymer modification sectors seeking to impart permanent antimicrobial, antifouling, or surface-modifying characteristics to their products.

Application

• Antimicrobial Coatings: Formulation of durable, non-leaching antimicrobial surfaces for medical devices, high-touch surfaces in public spaces, and textiles.
• Antifouling Marine Coatings: Development of advanced coatings for ship hulls and underwater structures to prevent biofouling by algae and barnacles.
• Surface Modification Agent: Used to permanently alter surface energy and wettability of polymers, glass, or composites for improved adhesion or water repellency.
• Functional Polymer Additive: Incorporated into plastics, resins, and elastomers to impart inherent biocidal or static-dissipative properties.
• Advanced Composite Materials: Serves as a reactive nanofiller or compatibilizer to enhance the mechanical and functional properties of silica-based composites.
• Personal Care & Cosmetics: Potential use as a conditioning and antimicrobial agent in specialty hair care or skincare formulations requiring film-forming properties.

Basic Information

Product Name	Poly[(Octadecyldimethylammoniumchloride)Propylsilsesquioxane]
CAS No.	1353244-79-7
Molecular Formula	Contact for details
Molecular Weight	Variable (Polymeric)
Synonyms	Poly(octadecyldimethylammonium chloride propylsilsesquioxane); Polyhedral Oligomeric Silsesquioxane Ammonium Salt; POSS-Ammonium Salt; Q-POSS; Octadecyl-POSS Quaternary Ammonium Chloride; Functionalized POSS; Antimicrobial Silsesquioxane Polymer; Hybrid Siloxane Quaternary Compound
EINECS	Contact for details

Quality Control

Our production of Poly[(Octadecyldimethylammoniumchloride)Propylsilsesquioxane] adheres to strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure consistency in functional group content, molecular weight distribution, and ionic activity. Certificates of Analysis (COA) detailing key parameters are provided with every shipment 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 material is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which may affect performance.

Specification

Item	Specification
Appearance	White to off-white powder or solid
Identification (IR)	Conforms to structure
Assay (Quaternary Ammonium Content)	≥ 90%
Loss on Drying	≤ 2.0 %
Residue on Ignition (SiO₂ Content)	Contact for details
Solubility	Soluble in common organic solvents (e.g., alcohols, DMF)

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