Perovion DTMHP L36-75 is a di(3,5,5-trimethylhexanoyl) peroxide formulation supplied as a 75% solution in isododecane. Perovion DTMHP L36-75 is a diacyl peroxide initiator used for the polymerization of ethylene, vinyl chloride, vinylidene chloride, and certain (meth)acrylate systems. Perovion DTMHP L36-75 is widely used in low-density polyethylene production and suspension polymerization of vinyl chloride at moderate temperatures.
Perovion DTMHP L36-75 Overview
Perovion DTMHP L36-75 belongs to the diacyl peroxide family, derived from 3,5,5-trimethylhexanoic acid. The branched trimethylhexanoyl structure gives this initiator moderate reactivity, positioning it between the fastest-decomposing peroxydicarbonates and the slower dialkyl and diacyl peroxides used at higher process temperatures, giving formulators an intermediate option when tuning overall batch reactivity. Diluting the active peroxide to 75% in isododecane improves handling safety and metering accuracy in industrial polymerization plants, since dosing equipment is typically calibrated for diluted rather than neat peroxide concentrates.
Key Features
- Moderate-temperature reactivity: Perovion DTMHP L36-75 is designed for polymerization processes running in a moderate temperature window, complementing faster and slower initiators in a plant’s overall peroxide portfolio and helping maintain consistent conversion rates across different reactor configurations.
- High-pressure ethylene process compatibility: The formulation works in both autoclave and tubular high-pressure processes used for LDPE production, giving producers flexibility to standardize on a single initiator across multiple reactor types.
- Suspension PVC compatibility: Perovion DTMHP L36-75 initiates suspension polymerization of vinyl chloride in a 50°C to 70°C range, supporting standard PVC resin production schedules without requiring significant changes to existing process conditions.
- Blendable with other peroxides: Combining Perovion DTMHP L36-75 with faster or slower initiators helps producers tune the reactivity profile across a polymerization batch, particularly where a broad conversion curve is desired from start to finish.
- Isododecane carrier: The isododecane solvent system is chosen for good solubility and compatibility with standard dosing equipment used in polymer plants, and its relatively low volatility supports safer handling during transfer operations.
Typical Applications
Perovion DTMHP L36-75 is used as an initiator in the high-pressure polymerization of ethylene to produce low-density polyethylene, in both autoclave and tubular reactor configurations. Its reactivity profile allows plant operators to target specific molecular weight distribution and branching characteristics in the finished resin, which in turn influence film clarity, tear strength, and heat-seal performance.
In vinyl chloride processing, Perovion DTMHP L36-75 is used for suspension polymerization between roughly 50°C and 70°C, often in combination with other peroxides to achieve a broader reactivity spectrum across the batch cycle. The formulation is also used in select (meth)acrylate copolymerization systems where moderate initiation temperature is required, offering an alternative to azo-type initiators in certain formulations.
Formulators typically qualify diacyl peroxide initiators of this type against target conversion rate, resin molecular weight distribution, and residual monomer levels at the end of the polymerization cycle. Because reactivity can vary with dilution level, carrier solvent, and storage history, many producers run small-scale trial batches before committing a new peroxide grade to full production volume, comparing results against established baseline initiators already qualified on the same line.
Technical Specifications
- Chemical Type: Di(3,5,5-trimethylhexanoyl) peroxide
- Appearance: Colorless to slightly yellow liquid
- Active Content: 75% in isododecane
- Active Oxygen Content: To be confirmed based on the final specification sheet.
- Density at 20°C: To be confirmed based on the final specification sheet.
- Assay: To be confirmed based on the final specification sheet.
- CAS Number: 3851-87-4
As with all organic peroxides, controlling exposure to heat, contamination, and mechanical shock during storage and handling is essential to maintaining safe and predictable decomposition behavior throughout the product’s shelf life.
Thermal Stability
- Organic peroxides are thermally unstable substances and must be handled with appropriate care at all times.
- Self-Accelerating Decomposition Temperature (SADT): To be confirmed based on the final specification sheet.
- Recommended maximum storage temperature: To be confirmed based on the final specification sheet.
Storage Recommendations
- Store in a cool, dry, well-ventilated area away from direct sunlight and other heat sources.
- Keep containers tightly closed when not in use to prevent contamination and moisture ingress.
- Avoid contact with reducing agents, acids, alkalis, and heavy metal compounds, which can trigger premature decomposition.
- Recommended shelf life under proper storage conditions: To be confirmed based on the final specification sheet.
As with other liquid diacyl peroxide concentrates, temperature control during transport and warehousing is an important part of maintaining product quality between manufacture and use. Producers should coordinate closely with logistics providers experienced in handling Class 5.2 organic peroxide shipments to ensure temperature-controlled transport is maintained throughout the supply chain.
Packaging & Transport
- Standard Packaging: Plastic drums or IBC totes; typical net weights available on request.
- UN Number: To be confirmed based on the final specification sheet.
- Hazard Class: Organic peroxide, Class 5.2
- Exact transport documentation and regional classification: To be confirmed based on the final specification sheet.
In LDPE production, initiator selection directly affects polymer branching structure, molecular weight distribution, and ultimately the mechanical and optical properties of the finished film or molded product. In PVC suspension polymerization, the reactivity window of the initiator package influences particle morphology, porosity, and plasticizer absorption of the resulting resin. Selecting the right combination of initiators, including moderate-reactivity diacyl peroxides, is therefore an important part of process optimization for both polymer families.
Perovion DTMHP L36-75: Safety & Handling
Perovion DTMHP L36-75 should be handled in accordance with applicable safety procedures for organic peroxides. The product is classified as an oxidizing material and requires appropriate storage and handling measures at all times, including avoidance of contact with incompatible materials and heat sources. Operators should avoid contact with skin and eyes, and should ensure adequate ventilation wherever this initiator is mixed, transferred, or applied, since vapors and mist can be irritating with prolonged exposure.
Users are advised to review the Safety Data Sheet prior to handling and to implement appropriate personal protective equipment and engineering controls as specified therein. Safety Data Sheet and destination-compliant labeling information are available upon request. For related peroxide polymerization initiators used across similar LDPE and PVC production processes, see also Perovion TBPND L23 and Perovion EHP L-60.