Vazo™ 67 is an oil-soluble AMBN [2,2’-azobis(2-methylbutanenitrile)] initiator compound similar to AIBN initiators but without TMSN formation risk. It safely and efficiently initiates free radical polymerizations.
Vazo™ 67, chemically known as 2,2’-azobis(2-methylbutanenitrile) or AMBN, is a substituted azo compound that initiates free radical polymerization. It decomposes when exposed to heat or light to form nitrogen gas and free radical intermediates.
Vazo™ 67 provides performance advantages compared to other initiators as it will not undergo redox reactions or react with solvents and dyes, can be blended with other initiator systems without radical-induced decomposition, and functions as intended, regardless of pH. The free radicals generated by Vazo™ 67 will also not abstract hydrogen from growing polymer chains, providing more control over polymer structure and preventing chain defects, branching, and cross-linking during polymerization. This makes it a higher-performing initiator in a variety of applications, including the synthesis of specialty resins, chemicals, and intermediates.
As an AMBN initiator, Vazo™ 67 is designed to perform similarly to an AIBN initiator but yields safer decomposition products. Namely, it does not form TMSN, for which OSHA and NIOSH have set exposure limits. Like other Vazo™ initiators, the number designated in the grade name indicates the 10-hour half-life temperature. Thus, Vazo™ 67 has a 10-hour half-life temperature of 67°C. It must be stored below 24°C, away from light and ignition sources, to ensure product quality and safety. For more information on the benefits and use cases for Vazo™, review the article near the bottom of this page.
Molecular weight, g/mol: 192.23
Appearance: White noodles
Purity, % min: 98.0
Water, max wt%: 0.5
Acetone insolubles, max wt%: 0.15
APHA color, max: 25
Iron, max ppm: 20
CAS number: 13472-08-7
Primary Chemistry: 2,2’-azobis(methylbutyronitrile) (AMBN)
Inefficient polymerization reactions Branching or cross-linking in the final polymer structure Health and safety concerns posed when working with organic peroxides Hazardous decomposition products of free radical initiators, such as TMSN
Polymerization initiator: Used in bulk, solution, and emulsion polymerization processes for plastics, rubber, and resin manufacturing Adhesive formulations: Enhances curing in adhesives like pressure-sensitive and structural adhesives in the automotive, aerospace, and construction industries, ensuring strong bonding and durability under thermal stress Coating systems: Used to polymerize resins used in the automotive, marine, and industrial equipment industries to prevent yellowing and surface defects Acrylic sheet manufacturing: Polymerizes methyl methacrylate for transparent and durable sheets in construction, signage, and optics industries to deliver clarity and consistency in sheet properties Foam production: Used as a chemical blowing agent for foams used in packaging, insulation, and automotive industries to support fine cell structure and uniform density in foam products Textile coatings: Facilitates polymerization of resins used in textile finishing in apparel, home furnishing, and technical textile industries to improve water resistance, durability, and aesthetic appeal Sealant and elastomers: Initiates polymerization and creates high-quality elastomeric resins used in construction, automotive, and electronics, providing thermal and chemical resistance to sealants and gaskets Medical polymers: Enables the production of biocompatible polymers for medical devices, surgical tools, optical applications, and drug delivery systems Composite materials: Used in polymerizing resins for fiber-reinforced composites in the aerospace, automotive, and sports equipment industries, contributing to lightweight, high-strength materials Oilfield chemicals: Contributes to developing polymers used in enhanced oil recovery, drilling fluids, and cementing operations Water treatment polymers: Aids in synthesizing flocculants and coagulants for efficient water purification processes Electronics encapsulation: Used to create resins for encapsulating and insulating electronic components in electronics and semiconductors, enhancing heat resistance and mechanical protection Coating systems: Used in solvent-based and UV-curable coatings in the automotive, marine, and industrial equipment industries to facilitate uniform polymer film formation and improving adhesion to substrates. Acrylic Sheet Manufacturing: Polymerizes methyl methacrylate for transparent and durable sheets in construction, signage, and optics industries to deliver clarity and consistency in sheet properties. Foam Production: Used in the polymerization of vinyl and acrylic foams in packaging, insulation, and automotive industries to support fine cell structure and uniform density in foam products. Textile Coatings: Enhances polymerization in textile finishing in apparel, home furnishings and technical textiles industries to improve water resistance, durability, and aesthetic appeal. Sealant and Elastomers: Initiates cross-linking in elastomeric formulations in construction, automotive and electronics, providing thermal and chemical resistance to sealants and gaskets. Ink and Pigment Dispersion: Facilitates polymer dispersion in solvent-based inks in the printing and packaging industry. It enhances print quality, adhesion, and gloss. Medical Applications: Polymerizes biocompatible materials for implants and devices in healthcare and biotechnology industries. It ensures high purity and stability in medical-grade polymers. Composite Materials: Used in polymerization of resins for fiber-reinforced composites in the aerospace, automotive and sports equipment industries. It contributes to lightweight, high-strength materials. Oilfield Chemicals: Enhances polymerization in drilling fluids and cementing in oil and gas industries. It provides stability and performance under high pressure and temperature. Water Treatment Polymers: Initiates polymerization for flocculants and coagulants in municipal and industrial water treatment industries. It improves contaminant removal and efficiency. Electronics Encapsulation: Used in resins for encapsulating and insulating electronic components in electronics and semiconductors. It enhances heat resistance and mechanical protection. Photopolymer Plates: Polymerizes monomers in flexographic plates in the printing industry. It delivers high resolution imaging and durability. Energy Storage: Used in the development of polymer electrolytes in battery and fuel cells. It improves ion conductivity and mechanical strength.
Vazo™ is a line of azo initiators ideally suited for safely and efficiently initiating free radical polymerizations.
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