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BPO granules
Benzoyl Peroxide (BPO) Granules are a stabilized, granular form of benzoyl peroxide, widely utilized as a polymerization initiator and curing agent in various industrial applications. This form offers enhanced safety, ease of handling, and consistent performance compared to other forms like powders or pastes.
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1. Chemical Identity
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Chemical Name: Benzoyl Peroxide
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CAS Number: 94-36-0
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Molecular Formula: C₁₄H₁₀O₄
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Molecular Weight: 242.23 g/mol
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Synonyms: Dibenzoyl Peroxide, BPO, Benzoic Peroxyanhydride
2. Physical and Chemical Properties
| คุณสมบัติ | ค่า |
|---|---|
| Appearance | White granular solid |
| Odor | Faint odor of benzaldehyde |
| Melting Point | 103–106 °C |
| ความหนาแน่น | 1.16 g/cm³ at 25 °C |
| Solubility in Water | Insoluble |
| Solubility in Organic Solvents | Soluble in acetone, benzene, chloroform; slightly soluble in ethanol |
| Flash Point |
|
| Decomposition Temperature | 131 °C (1-minute half-life) |
| Theoretical Active Oxygen Content | 6.62% |
3. Technical Data Sheet (TDS)
3.1. Product Specifications
| พารามิเตอร์ | ข้อมูลจำเพาะ |
|---|---|
| Assay (BPO Content) | 72–76% |
| Water Content | 22–25% |
| Free Chloride | ≤0.1% |
| Free Acid (as Benzoic Acid) | ≤0.5% |
| Appearance | White granular solid |
| Bulk Density | 500–600 kg/m³ |
3.2. Thermal Decomposition Data
| Half-Life | Temperature |
|---|---|
| 10 hours | 73 °C |
| 1 hour | 92 °C |
| 1 minute | 131 °C |
4. Applications
4.1. Polymer Industry
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Initiator for Polymerization: BPO granules are extensively used to initiate the polymerization of monomers such as styrene, methyl methacrylate, and acrylates in the production of plastics, resins, and adhesives.
4.2. Composite Materials
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Curing Agent: In unsaturated polyester and vinyl ester resins, BPO granules act as a curing agent, facilitating cross-linking during the fabrication of fiberglass-reinforced plastics.
4.3. Rubber Industry
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Vulcanizing Agent: BPO granules serve as a vulcanizing agent and cross-linking agent for silicone rubber and fluorine rubber.3bf12b2b2d28ef1b.en.made-in-china.com
5. Safety and Handling
5.1. Hazards Identification
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Oxidizing Agent: BPO granules are strong oxidizers and can pose fire and explosion hazards, especially when dry or in contact with combustible materials.
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Health Hazards: Exposure may cause skin and eye irritation. Inhalation of dust can irritate the respiratory tract.
5.2. Exposure Limits
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NIOSH Recommended Exposure Limit (REL): TWA 5 mg/m³
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OSHA Permissible Exposure Limit (PEL): TWA 5 mg/m³
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Immediately Dangerous to Life or Health (IDLH): 1500 mg/m³
5.3. Personal Protective Equipment (PPE)
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Eye Protection: Safety goggles or face shield
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Skin Protection: Protective gloves and clothing
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Respiratory Protection: Dust mask or respirator in case of inadequate ventilation
5.4. First Aid Measures
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Inhalation: Move to fresh air. Seek medical attention if symptoms persist.
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Skin Contact: Wash with soap and water. Remove contaminated clothing.
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Eye Contact: Rinse cautiously with water for several minutes. Seek medical advice.
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Ingestion: Do not induce vomiting. Seek immediate medical attention.
6. Storage and Stability
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สภาพการเก็บรักษา: Store in a cool, dry, well-ventilated area away from heat sources and direct sunlight.
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Temperature: Maintain storage temperature below 35 °C.
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บรรจุภัณฑ์: Typically available in 20 kg or 25 kg containers with inner polyethylene bags and outer fiber drums or cartons.
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Stability: BPO granules are stable under recommended storage conditions but decompose upon heating, shock, or friction.
7. Regulatory Information
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UN Number: 3104 (for BPO with ≥52% content)
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Hazard Class: 5.2 (Organic Peroxides)
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Packing Group: II
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Regulatory Listings: BPO is listed under various regulatory frameworks, including REACH, TSCA, and OSHA.
8. Environmental Impact
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Ecotoxicity: BPO is harmful to aquatic life with long-lasting effects.
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Degradability: It decomposes into benzoic acid and oxygen, which can contribute to environmental oxygen demand.
BPO granules
ชุด :
Fiberglass Accessories >แอปพลิเคชัน
5.1. Polymer Industry Initiator for Polymerization: BPO is widely used to initiate the polymerization of monomers like styrene, methyl methacrylate, and acrylates in the production of plastics, resins, and adhesives. 5.2. Composite Materials Curing Agent: In unsaturated polyester and vinyl ester resins, BPO acts as a curing agent, facilitating cross-linking during the fabrication of fiberglass-reinforced plastics. 5.3. Pharmaceuticals and Cosmetics Acne Treatment: BPO is a common active ingredient in topical acne medications due to its antibacterial properties. 5.4. Food Industry Bleaching Agent: BPO is employed to bleach flour, whey, and cheese products, improving their appearance.
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ทีเอฟคอมโพสิต
ชื่อผลิตภัณฑ์ :
BPO granules
คำถามที่พบบ่อย
ถาม :
What is BPO Paste used for in the fiberglass industry?
ตอบ :
BPO (Benzoyl Peroxide) paste is primarily used as a curing initiator for unsaturated polyester and vinyl ester resins. It helps start the polymerization process in various fiberglass manufacturing methods like hand lay-up, spray-up, pultrusion, casting, and filament winding.
ถาม :
Why is BPO used in paste form rather than powder?
ตอบ :
Safer (less risk of explosion or fire) Easier to handle and mix Less dusty More stable during storage and transportation
ถาม :
Can BPO paste be used alone for curing?
ตอบ :
No. BPO paste requires a promoter/accelerator—most commonly cobalt octoate—to decompose properly and generate free radicals for curing.
ถาม :
What is the typical dosage of BPO paste in fiberglass production?
ตอบ :
The standard dosage is usually 1.0% – 2.5% by resin weight, depending on resin type, curing speed required, and temperature.
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