Description

Distearyl Peroxydicarbonate (Not More Than 87%, With Stearyl Alcohol) is a high-purity organic peroxide initiator widely used in polymerization processes. This compound is valued for its ability to decompose at moderate temperatures, generating free radicals essential for initiating vinyl polymerizations. It is a critical raw material for manufacturers in the polymer and plastics industries, particularly for the production of PVC, polyolefins, and other specialty resins where controlled molecular weight and polymer architecture are required.

Application

• Primary Initiator for PVC Suspension Polymerization: Used to control the molecular weight and particle size distribution of suspension-grade PVC resins.
• Co-initiator for High-Pressure LDPE Production: Employed in autoclave or tubular processes to initiate the free-radical polymerization of ethylene.
• Crosslinking Agent for Unsaturated Polyester Resins: Facilitates the curing and hardening of resins in fiberglass-reinforced plastics (FRP) and sheet molding compounds (SMC).
• Modifier for Acrylic Polymers: Used in the synthesis of PMMA (polymethyl methacrylate) and other acrylics to regulate polymer chain growth.
• Production of Expandable Polystyrene (EPS): Acts as a key component in the polymerization initiator system for creating low-density foam materials.
• Synthesis of Specialty Copolymers: Enables the production of engineered polymers with specific thermal and mechanical properties for advanced applications.

Basic Information

Product Name	Distearyl Peroxydicarbonate (Not More Than 87%, With Stearyl Alcohol)
CAS No.	52326-66-6
Molecular Formula	C38H74O6
Molecular Weight	626.99 g/mol
Synonyms	Di(stearyl) Peroxydicarbonate; DSPD; Di-n-octadecyl Peroxydicarbonate; Peroxydicarbonic Acid, Dioctadecyl Ester; Dioctadecyl Peroxydicarbonate; S-PD; Stearyl Peroxydicarbonate; Luperox® SDP
EINECS	257-891-6

Quality Control

Our Distearyl Peroxydicarbonate is manufactured under strict process controls to ensure batch-to-batch consistency and reliability. Quality is verified through a comprehensive analytical regime including assay, active oxygen content, and impurity profile analysis. A Certificate of Analysis (COA) detailing purity, assay, and relevant safety parameters accompanies every shipment, ensuring compliance with your formulation and safety requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat, sparks, and open flame. Recommended storage temperature is below 25°C (77°F). Keep away from incompatible materials such as reducing agents, strong acids, bases, and metals. This material is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Assay (Distearyl Peroxydicarbonate)	Not more than 87%
Active Oxygen Content	Contact for details
Identification (IR)	Conforms
Stearyl Alcohol Content	Balance (Approx. 13% minimum)
Melting Point	Contact for details
Loss on Drying	< 0.5%

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