Description

Siloxanes And Silicones, Di-Me, Polymers With 3-Mercaptopropyl Silsesquioxanes is a specialized organosilicon polymer that combines the flexibility of polydimethylsiloxane (PDMS) with the reactive functionality of mercaptopropyl groups. This unique hybrid structure is engineered to provide enhanced surface adhesion, crosslinking capability, and compatibility with various organic and inorganic matrices. It is a critical intermediate for formulators and manufacturers seeking to improve the performance and durability of advanced materials. Key industries that utilize this polymer include specialty coatings, advanced adhesives, and high-performance elastomers.

Application

• Adhesion Promoter & Coupling Agent: Used in coatings, sealants, and adhesives to improve bonding between organic polymers and inorganic substrates like glass, metals, and minerals.
• Crosslinking Agent for Silicone Elastomers: Serves as a reactive site for peroxide or platinum-catalyzed curing systems, enhancing the mechanical strength and thermal stability of silicone rubbers.
• Surface Modification Additive: Imparts hydrophobic, release, or specific chemical functionality to surfaces in textile, paper, and composite manufacturing.
• Intermediate for Further Synthesis: The reactive thiol (-SH) group allows for thiol-ene click chemistry, making it a valuable building block for creating custom siloxane architectures.
• Component in Optical & Electronic Materials: Used in the formulation of encapsulants, potting compounds, and protective coatings where clarity, flexibility, and environmental resistance are required.
• Additive for Personal Care & Cosmetic Products: Functions as a conditioning agent and film-former in hair care and skincare formulations, providing improved feel and durability.

Basic Information

Product Name	Siloxanes And Silicones, Di-Me, Polymers With 3-Mercaptopropyl Silsesquioxanes
CAS No.	108775-26-4
Molecular Formula	Contact for details
Molecular Weight	Variable (Polymer)
Synonyms	3-Mercaptopropyl Silsesquioxane-Dimethylsiloxane Copolymer; Mercaptopropyl-Functionalized Polydimethylsiloxane; Thiol-Functional Silicone Polymer; Poly(dimethylsiloxane-co-mercaptopropylsilsesquioxane); SH-PDMS; Mercaptopropyl Modified Silicone Oil; Reactive Silicone Fluid with Thiol Groups; Siloxane Polymer with Mercaptopropyl POSS
EINECS	Contact for details

Quality Control

Our production of Siloxanes And Silicones, Di-Me, Polymers With 3-Mercaptopropyl Silsesquioxanes adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing to ensure consistency in key parameters such as thiol content, viscosity, molecular weight distribution, and purity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing the specific results against agreed specifications. Our quality system is designed to support applications requiring reliable performance and traceability.

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 easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve the reactivity of the thiol groups. Keep away from strong oxidizing agents and sources of ignition.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Thiol Content (SH Value)	As per grade (e.g., 0.5 - 2.0 meq/g)
Viscosity @ 25°C	As per grade (cSt)
Specific Gravity @ 25°C	0.98 - 1.05
Refractive Index @ 25°C	1.40 - 1.43
Volatile Content	< 2.0%

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