Perovion DBPH L14-85 is a bifunctional organic peroxide, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexyne-3 (DBPH), supplied as an 85% liquid solution in mineral oil for the crosslinking of natural rubber, synthetic rubbers, and polyolefins. Perovion DBPH L14-85 is valued for its high crosslinking efficiency and thermal stability, making it suitable for demanding rubber and polymer crosslinking processes that require a safe processing window followed by a fast, efficient cure.
Perovion DBPH L14-85 Overview
As a bifunctional peroxide, Perovion DBPH L14-85 carries two peroxide groups per molecule, giving it higher crosslinking efficiency per unit weight compared to monofunctional peroxides. The 85% mineral oil solution form improves handling and dispersion in rubber compounds and polyolefin resins compared to solid peroxide grades, while still delivering the thermal stability needed for compounding and extrusion prior to cure. This balance of handling convenience and thermal performance is one reason liquid bifunctional peroxides are often preferred over solid monofunctional grades in continuous compounding lines, particularly where automated metering equipment is used.
This grade is formulated to provide a safe processing window at typical compounding and extrusion temperatures, followed by efficient crosslinking once the compound reaches its target cure temperature, helping processors avoid premature scorch during processing. A clearly defined gap between the safe processing temperature and the crosslinking temperature gives compounders more confidence when running mixing, extrusion, or calendering steps at elevated line speeds.
Formulators new to bifunctional peroxide crosslinking should note that dosage, cure temperature, and post-cure schedule all interact to determine final crosslink density and physical properties. Working with a supplier that can advise on typical dosage ranges for a given rubber or polyolefin system helps shorten the qualification process when introducing this grade into an existing production line, and can reduce the number of trial batches needed before full-scale production begins. In practice, this often means fewer iterations on accelerator ratio, cure temperature, and post-cure time before a formulation meets target physical properties.
Key Features
- Bifunctional crosslinking chemistry: Two peroxide groups per molecule give Perovion DBPH L14-85 higher crosslinking efficiency per unit weight than typical monofunctional peroxides, supporting efficient dosing.
- Liquid mineral oil solution: The 85% solution form improves dispersion and handling in rubber and polyolefin compounds compared to solid peroxide grades.
- Defined processing window: A safe processing temperature followed by a well-characterized crosslinking temperature helps processors plan compounding, extrusion, and cure stages with confidence.
- Broad substrate compatibility: Suitable for crosslinking natural rubber, a range of synthetic rubbers, and polyolefins, giving formulators flexibility across multiple product lines. This versatility can help reduce the number of distinct peroxide grades a facility needs to stock and qualify, simplifying purchasing and quality control across multiple production lines, which can be particularly valuable for smaller operations with limited technical staff.
- Consistent shelf life: Maintains specification within its stated shelf life when stored within the recommended temperature range, supporting predictable inventory planning.
Typical Applications
Perovion DBPH L14-85 is used as a crosslinking agent in natural rubber and synthetic rubber compounds, as well as in polyolefin crosslinking applications such as wire and cable insulation, foam, and engineering polymer modification. Its bifunctional structure and defined processing window make it a common choice where a clear separation between safe processing and efficient cure is required.
Typical end uses include crosslinked polyolefin foam and wire and cable compounds, technical rubber goods, and other molded or extruded rubber and polyolefin parts where peroxide crosslinking is preferred over sulfur vulcanization, for example where higher heat resistance or compression set performance is required. Wire and cable producers in particular often specify peroxide crosslinking for medium- and high-voltage insulation, where long-term thermal and electrical performance under load is critical over the service life of the cable. Peroxide-cured parts also typically show lower compression set and better long-term heat aging behavior than comparable sulfur-cured rubber, which is a common driver for choosing this crosslinking route over conventional sulfur vulcanization systems in demanding service environments.
Technical Specifications
- Chemical Type: 2,5-Dimethyl-2,5-di(tert-butylperoxy)hexyne-3 (DBPH), 85% in mineral oil
- CAS Number: 1068-27-5
- Appearance: Slightly yellow transparent liquid
- Active Content: 83.0-86.0% (nominal 85%)
- Safe Processing Temperature: Approximately 145°C (rheometer ts2 greater than 20 minutes)
- Typical Crosslinking Temperature: Approximately 185°C (rheometer t90 about 12 minutes)
- Total Active Oxygen: 9.27-9.61%
- Density (20°C): Approximately 0.889 g/cm³
- Self-Accelerating Decomposition Temperature (SADT): 80°C
Thermal Stability
- Organic peroxides are thermally unstable substances and must be handled with appropriate care.
- SADT: 80°C (176°F)
Storage Recommendations
- Recommended storage temperature: 10°C to 30°C (50°F to 86°F)
- Store in a dry, well-ventilated area away from heat sources and direct sunlight.
- Keep containers tightly closed.
- Avoid contact with reducing agents, acids, alkalis, and heavy metal compounds.
- When stored within the recommended temperature range, this product remains within specification for at least 6 months after delivery.
Packaging & Transport
- Standard Packaging: 30-liter HDPE Nourytainer-type can, 25 kg net (standard regions); 5-gallon non-returnable polyethylene container, 35 lb net (North America)
- Net Weight: 25 kg per can (standard regions) / 35 lb per container (North America)
- UN Number: UN 3103
- Transport Class: Organic peroxide, Type C, liquid, Division 5.2
Facilities running mixed production across rubber and polyolefin lines often value a single, well-documented bifunctional peroxide grade that can support several product types, which can reduce the complexity of qualifying separate crosslinking agents for each application. First-in, first-out stock rotation and dating of containers on receipt are recommended, particularly given the recommended storage temperature range for this product.
Perovion DBPH L14-85: Safety & Handling
Perovion DBPH L14-85 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, including keeping it segregated from reducing agents, accelerators, and other incompatible substances.
Users, particularly those new to handling liquid organic peroxides, are advised to review the Safety Data Sheet carefully prior to handling and to implement appropriate personal protective equipment and engineering controls as specified therein, including measures to control vapor exposure during transfer and dosing. Safety Data Sheet and destination-compliant labeling information are available upon request, and should be reviewed by all personnel before first use at a new site. For related crosslinking peroxide grades, see also Perovion DCBP PPD-50 and Perovion DTBP L-B.