Description

Mercapto-Terminated Polysulfide Polymer CAS NO 109159-22-0 is a specialty liquid polymer characterized by reactive terminal thiol (-SH) groups. This unique structure provides exceptional properties as a flexibilizing and crosslinking agent, enabling the formulation of high-performance, durable materials. It is essential for manufacturers in the sealant, adhesive, coating, and aerospace industries seeking to enhance elasticity, chemical resistance, and adhesion in their products.

Application

• Sealants & Adhesives: A key intermediate in formulating high-performance polysulfide-based sealants for construction, aerospace, and marine applications, offering excellent fuel and weather resistance.
• Elastomer Modification: Acts as a flexibilizer and crosslinker in epoxy, polyurethane, and other polymer systems to improve impact resistance and reduce brittleness.
• Coatings & Linings: Used in protective coatings and tank linings where superior chemical resistance to solvents, oils, and aggressive environments is required.
• Aerospace Composites: Employed in composite matrices and fuel tank sealants due to its low-temperature flexibility and fuel impermeability.
• Electrical Potting & Encapsulation: Provides moisture and environmental protection for sensitive electronic components.
• Rubber Vulcanization: Serves as a curing agent or co-agent in the vulcanization of specialty rubbers.

Basic Information

Product Name	Mercapto-Terminated Polysulfide Polymer
CAS No.	109159-22-0
Molecular Formula	(C2H4SS)n with terminal -SH
Molecular Weight	Varies (Polymer)
Synonyms	Polysulfide polymer, mercaptan-terminated; Liquid polysulfide polymer; Thiokol LP polymer (generic); Poly(ethyl formal disulfide) terminated with mercapto groups; Mercapto-terminated poly(sulfide); Reactive liquid polysulfide; LP-3, LP-33, LP-980 (common trade designations); Thiol-terminated polysulfide
EINECS	Contact for details

Quality Control

Our Mercapto-Terminated Polysulfide Polymer is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistency in key parameters such as thiol content, viscosity, and molecular weight distribution. Certificates of Analysis (COA) detailing purity and performance specifications are provided with every shipment to guarantee compliance with your formulation requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is easily oxidized (store under inert atmosphere) and is light-sensitive (store away from light). Keep away from strong oxidizing agents, strong acids, and bases. Under recommended conditions, the product is stable for 24 months from the date of manufacture.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color	Pale yellow to amber
Thiol Content (SH Value)	Contact for details
Viscosity (25°C)	Contact for details
Molecular Weight (Mn)	Contact for details
Water Content	< 0.1%
Identification (IR)	Conforms

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