Di(tert-butylperoxyisopropyl)benzene - Perodox® 14

Di(tert-butylperoxyisopropyl)benzene is a bifunctional peroxide used for crosslinking natural rubber, synthetic rubbers, and polyolefins. It provides excellent scorch safety and allows one-step mixing under certain conditions.

Perodox 14 has an active oxygen content of 9.45%, with a minimum concentration of 9.26%.

The molecular weight of Di(tert-butylperoxyisopropyl)benzene is 338.5 g/mol.

The CAS numbers for Di(tert-butylperoxyisopropyl)benzene are 25155-25-3 and 2212-81-9.

The safe processing temperature for BIPB is 135°C, with a rheometer ts2 > 20 minutes.

The typical crosslinking temperature for BIPB is 175°C, with a rheometer t90 of about 12 minutes.

The Self-Accelerating Decomposition Temperature (SADT) for Perodox 14 is 80°C (176°F).

Store at a maximum temperature of 20°C (68°F) to prevent caking. BIPB can be safely stored at 30°C (86°F) max without loss of activity. Under proper conditions, it maintains specifications for at least 12 months after delivery.

The EINECS/ELINCS number for Di(tert-butylperoxyisopropyl)benzene is 218-664-7.

Major decomposition products include tert-butanol, methane, acetone, and bis(2-hydroxyisopropyl)benzene.

Classified as Organic peroxide type D; solid, Division 5.2; UN 3106; PG II.

Perodox 14 is packaged in 20 kg corrugated boxes.

BIPB provides excellent scorch safety, allows one-step mixing under certain conditions, and offers efficient crosslinking with good mechanical properties in the cured rubber.

BIPB can crosslink natural rubber, synthetic rubbers (such as EPDM, SBR, NBR), and various polyolefins.

BIPB offers superior scorch safety compared to many other peroxides, making it suitable for processing at higher temperatures without premature vulcanization.

BIPB has a molecular formula of C20H34O4 and consists of a benzene ring with two tert-butylperoxyisopropyl groups attached at the 1 and 4 positions.

Typical dosage ranges from 1.5% to 3.0% based on rubber weight, depending on the specific application, desired crosslink density, and processing conditions.

Standard BIPB is not specifically approved for direct food contact applications. For food-grade rubber products, consult the manufacturer for appropriate grades and certifications.

When stored at ≤20°C, Perodox 14 maintains its specifications for at least 12 months after delivery. Extended storage may require lower temperatures to preserve activity.

Avoid heat sources, open flames, and direct sunlight. Use appropriate PPE including safety goggles and chemical-resistant gloves. Ensure adequate ventilation in working areas.

The density of Di(tert-butylperoxyisopropyl)benzene is approximately 1.02 g/cm³ at 20°C.

Di(tert-butylperoxyisopropyl)benzene has a melting point of approximately 8°C.

The decomposition rate of BIPB increases exponentially with temperature. At higher temperatures, the half-life decreases significantly, leading to faster crosslinking.

BIPB does not have a defined flash point as it may decompose before reaching its flash point temperature. It is classified as a flammable solid due to its oxidizing properties.

BIPB is primarily used for bulk, solution, and suspension polymerization. For emulsion polymerization, specific formulations and stabilizers may be required.

BIPB is soluble in most organic solvents including aromatic hydrocarbons, chlorinated solvents, esters, and ketones, which facilitates its use in various polymerization systems.

BIPB crosslinking typically results in good tensile strength, elongation at break, and compression set resistance in the cured rubber, depending on the formulation and curing conditions.

For skin contact: Wash with plenty of water. For eye contact: Rinse cautiously with water for several minutes. For inhalation: Move to fresh air. In all cases, seek medical attention if irritation persists.

BIPB is used in rubber manufacturing, automotive industry (seals, hoses), construction (gaskets, seals), and various industrial applications requiring peroxide-cured rubber products.

Small spills should be absorbed with inert material and placed in appropriate containers. Large spills may require professional hazardous materials response. Avoid generating dust and provide adequate ventilation.

BIPB may undergo self-accelerating decomposition at temperatures above its SADT of 80°C rather than auto-ignition. It should be stored and handled well below this temperature.

Yes, international shipping of BIPB must comply with IMDG (sea), IATA (air), and ADR (road) regulations for organic peroxides, including proper classification, packaging, labeling, and documentation.

BIPB has a low vapor pressure at room temperature, which increases with temperature. Specific values depend on the temperature and should be consulted in the product's safety data sheet.

BIPB can be used for thick sections with proper formulation. For very thick sections, multiple-layer application or temperature-controlled curing may be required to prevent excessive exotherm and ensure complete cure.

BIPB is generally compatible with most rubber additives including fillers, plasticizers, and antioxidants. Incompatibilities include strong reducing agents, certain accelerators, and some antioxidants that may interfere with peroxide decomposition.

Cure time varies with temperature and formulation: at 175°C, typical cure time is 10-15 minutes to reach 90% crosslinking (t90). Lower temperatures require longer cure times.

BIPB peroxide curing provides heat-resistant C-C bonds compared to less heat-stable S-S bonds in sulfur curing. Peroxide-cured rubbers generally have better heat resistance but may have inferior dynamic properties compared to sulfur-cured systems.

The recommended maximum storage temperature is 20°C. Storage at lower temperatures (10-15°C) can extend the shelf life beyond the minimum 12-month guarantee.

Quality control includes testing for active oxygen content, purity by HPLC, water content, and stability testing to ensure consistent performance and safety.

Emerging applications include advanced composites, high-temperature resistant seals, medical devices, and specialty elastomers requiring precise crosslink control and thermal stability.