Description

Dimethylsilylene Distearate is a specialized organosilicon compound that functions as an effective internal and external lubricant and release agent. Its unique chemical structure provides excellent thermal stability and compatibility with a wide range of polymer matrices, enhancing processing efficiency and final product quality. This additive is essential for manufacturers in the plastics, rubber, and personal care industries seeking to improve mold release, reduce surface friction, and modify material properties.

Application

• Polymer Processing Aid: Acts as an internal and external lubricant in polyolefin (PP, PE) and engineering plastic (PVC, ABS) production to improve flow, reduce torque, and prevent sticking.
• Mold Release Agent: Provides excellent non-stick properties in injection molding, extrusion, and die-casting applications for cleaner part ejection.
• Rubber Industry: Used as a processing aid and mold release agent in the manufacture of various rubber goods, reducing tackiness and improving surface finish.
• Personal Care & Cosmetics: Functions as an emollient, texture enhancer, and water-repellent agent in creams, lotions, and makeup formulations.
• Textile & Fiber Treatment: Imparts water repellency, softness, and lubricity to synthetic fibers and fabrics during processing.
• Paper Coating: Used as a slip agent and water repellent in specialty paper coatings and release papers.
• Coatings & Inks: Serves as a flow and leveling agent, as well as a mar and abrasion resistance additive.

Basic Information

Product Name	Dimethylsilylene Distearate
CAS No.	18856-04-7
Molecular Formula	C38H78O4Si
Molecular Weight	627.1 g/mol
Synonyms	Bis(stearoyloxy)dimethylsilane; Dimethylbis(stearoyloxy)silane; Dimethylsilanediol Distearate; Distearic Acid Dimethylsilyl Ester; Stearic Acid, Dimethylsilylene Ester; DSDS; Silane, bis(1-oxooctadecyloxy)dimethyl-; Organosilicon Distearate
EINECS	242-638-9

Quality Control

Our Dimethylsilylene Distearate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, chemical identity, and performance characteristics. Certificates of Analysis (COA) detailing key specifications such as assay, melting point, and acid value are provided with every shipment to guarantee compliance with your technical requirements.

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). Keep away from strong oxidizing agents, strong acids, and strong bases. Under recommended storage conditions, the product has excellent shelf stability.

Specification

Item	Specification
Appearance	White to off-white waxy solid / flakes
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Melting Point	50 - 55 °C
Acid Value	≤ 1.0 mg KOH/g
Loss on Drying	≤ 0.5 %
Heavy Metals (as Pb)	≤ 10 ppm

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