Keltan 312

Keltan 8550C is a type of ethylene-propylene rubber (EPM) characterized by specific properties that make it suitable for various applications:

1. Chemical Composition: It contains ethylene and propylene as primary monomers, with a medium content of ethylidene norbornene (ENB). The ENB content affects the polymer's properties, such as its curing characteristics and flexibility.
2. Physical Properties:
   • Mooney Viscosity: 80 MU (ML (1+4) at 125°C). This indicates the viscosity of the rubber, which affects processing and mixing characteristics.
   • Ethylene Content: 48% by weight.
   • ENB Content: 5.5% by weight.
   • Molecular Weight Distribution: High molecular weight with Controlled Long Chain Branching (CLCB), which enhances processing efficiency and product performance.
3. Applications:
   • It is used in the production of dense profiles, coolant hoses, potable water seals, and other intricate profiles due to its fast mixing and efficient vulcanization properties.
4. Supply Form:
   • It is supplied in quasi friable bales, typically packaged in cardboard boxes with LDPE (Low-Density Polyethylene) bale wrap. Each shipment contains 36 bales, totaling approximately 900 kg.
5. Additional Features:
   • Specific Gravity: Approximately 0.86 kg/dm³, indicating its density.
   • Stabilizer: Non-staining, which ensures it does not leave marks or discoloration on finished products.

In summary, Keltan 8550C is a specialized ethylene-propylene rubber designed for applications requiring fast processing, efficient vulcanization, and the ability to extrude intricate profiles, such as automotive parts and seals. Its specific chemical composition and physical properties cater to these demanding manufacturing needs.

Keltan® 512X50 is an ethylene-propylene-(diene) monomer (EP(D)M) rubber, which is oil-extended and used in various industrial applications. Here's a detailed breakdown of its characteristics and safety information based on the provided technical data sheet:

Product Information

• Product Name: Keltan® 512X50
• Chemical Name: Ethylene-propylene-(diene) elastomer, EP(D)M oil extended
• Supplier: DSM Elastomers Europe B.V.
  • Address: Poststraat 1, 6135 KR Sittard, The Netherlands
  • Emergency Telephone Number: +31 (0)46 476 55 55
• Recommended Use:
  • Elastomeric component in rubber compounds
  • Plastics modification and oil modification
  • Applications in automotive, construction, wire and cable, and general rubber goods.

Composition/Ingredients

• Type: Preparation
• Hazardous Ingredients: None known in quantities requiring reporting as per EU or National regulations.

Hazards Identification

• Human Health Hazards:
  • Heated material can cause thermal burns.
• Environmental Hazards:
  • Based on available data, no hazardous properties are known.
• Physical/Chemical Hazards:
  • Combustible, burns slowly with high smoke density and flaming drips.

First Aid Measures

• Inhalation:
  • Small amounts of free monomer may evaporate during heating and processing, potentially causing respiratory irritation and nausea.
• Ingestion:
  • Not applicable.
• Skin Contact:
  • Heated material can cause thermal burns, leading to pain, redness, and blistering.
• Eye Contact:
  • May cause eye irritation, redness.
• First Aid Steps:
  • Inhalation: Move to fresh air. Seek medical attention if symptoms persist.
  • Ingestion: Rinse mouth with water (if the person is conscious). Seek medical attention if symptoms occur.
  • Skin Contact: Rinse with plenty of water. Seek medical attention if symptoms occur.
  • Eye Contact: Rinse with plenty of water for several minutes. Seek medical attention if irritation persists.

Physical and Chemical Properties

• Physical State: Solid (Bales)
• Color: Beige to yellowish-brown
• Odour: Odourless
• Flash Point: >260°C
• Explosion Limits: Not available
• Auto-ignition Temperature: >370°C
• Density: 0.865 to 0.879 g/cm³
• Solubility: Insoluble in cold water

Handling and Storage

• Handling Precautions: Avoid inhalation of fumes during heating. Use good ventilation.
• Storage: Store in a cool, dry place away from ignition sources and strong oxidizers.

Safety Notes

• Remarks:
  • The product may release small amounts of free monomer during processing, which can irritate the respiratory tract.
  • In case of fire, the material burns with high smoke density.

Additional Information

• Physical State Details: The product is supplied in bales and is typically used in applications requiring a robust, flexible rubber material.

This comprehensive overview should provide a clear understanding of Keltan® 512X50's properties, uses, and safety considerations. For further details, always refer to the Material Safety Data Sheet (MSDS) and comply with all relevant safety regulations.

Rhenogran CaO-80 is a predispersed rubber chemical and additive designed primarily as a desiccant for rubber compounds to prevent porosity. Here's a detailed overview:

Function:

• Desiccant: Used to absorb moisture in rubber compounds, thereby preventing porosity in vulcanizates.

Product Description:

• Composition: 80% calcium oxide, 20% elastomer binder, and dispersing agents.
• Appearance: Grey granules.
• Density, 20°C: Approximately 2.25 g/cm³.
• Discolouration of Vulcanizates: None.
• Physiological Properties: See safety data sheet for details.

Use:

• Desiccant: Prevents porosity in rubber compounds during curing.

Mode of Action:

• Absorption of Moisture: Calcium oxide binds moisture to form calcium hydroxide, thereby preventing porosity issues caused by trapped moisture during curing processes.

Processing:

• Compatibility: The thermoplastic elastomer binder and special dispersing agents ensure quick absorption and excellent dispersion in rubber compounds.
• Mixing: Recommended to add Rhenogran CaO-80 at the end of the mixing cycle to prevent premature activation and ensure effective dispersion.

Dosage:

• Typical Dosage: Between 2 and 10 parts per hundred parts of rubber (phr), depending on the expected moisture content of the compound.

Application:

• Recommended For: Extruded rubber articles such as profiles, seals, belts, straps, conveyor belts, rollers, cable coverings, and rubber floorings.
• Suitable Environments: Used in extrusion compounds that require continuous curing in various settings including open air, fluid beds, salt baths, or UHF equipment.
• Expanded Compounds: Particularly beneficial in microcellular rubber to achieve a more uniform cell structure.

Packing:

• Packaging: 20 kg cartons containing individually packed PE bags of 1 or 2.5 kg.

Storage Stability:

• Storage Conditions: Store in original closed containers under cool and dry conditions for a maximum of 6 months.

Handling:

• Handling: Rhenogran CaO-80 is non-caking, free-flowing, and non-dusting, ensuring ease of handling. It disperses quickly in all compounds.
• Temperature Sensitivity: PE film can be absorbed by the hot rubber mix at temperatures exceeding 110°C, facilitating incorporation without difficulty.
• Accelerating Effect: Depending on the compound recipe, Rhenogran CaO-80 may have an accelerating effect, influencing curing times.

Safety:

• Safety Data Sheet: Consult the material safety data sheet (MSDS) for additional handling and safety information.

Rhenogran CaO-80 is a specialized additive that addresses the critical issue of moisture control in rubber processing, ensuring the production of high-quality vulcanizates without porosity. Its compatibility with various rubber types and ease of incorporation make it a valuable component in industrial rubber manufacturing processes.