Description

Modified Methylaluminoxane, Type 4 (CAS No. 146905-79-5) is a highly active and versatile co-catalyst specifically engineered for olefin polymerization processes. Its primary value lies in its exceptional ability to activate single-site metallocene and post-metallocene catalysts, significantly enhancing polymerization activity and allowing for precise control over polymer microstructure. This product is essential for advanced polyolefin manufacturers and R&D facilities focused on producing specialty polymers, including high-performance polyethylene and polypropylene grades with tailored properties.

Application

• Primary co-catalyst for activating metallocene catalysts in the production of linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE).
• Critical component in the synthesis of polypropylene (PP) with controlled tacticity and improved mechanical properties.
• Enables the production of specialty polyolefin elastomers (POE) and plastomers with unique elasticity and clarity.
• Used in advanced copolymerization processes to incorporate α-olefin comonomers like 1-hexene and 1-octene.
• Facilitates R&D into new single-site catalyst systems and novel polymer architectures.
• Applied in gas-phase, slurry-phase, and solution-phase polymerization reactor technologies.

Basic Information

Product Name	Modified Methylaluminoxane, Type 4
CAS No.	146905-79-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	MMAO, Type 4; Modified MAO; Modified Methylaluminoxane solution; MMAO-4; Alkylaluminoxane; Co-catalyst for metallocenes; Polyolefin catalyst activator; Triisobutylaluminum-modified methylaluminoxane
EINECS	Contact for details

Quality Control

Our Modified Methylaluminoxane, Type 4 is manufactured under stringent quality management systems to ensure batch-to-batch consistency and performance reliability for critical polymerization processes. Each lot is analyzed to confirm key parameters such as aluminum content, activity, and solution stability. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (nitrogen or argon) at room temperature (15-25°C) in a cool, dry, and well-ventilated area. This material is moisture-sensitive and pyrophoric; keep away from heat, sparks, open flames, and oxidizing agents.

Specification

Item	Specification
Appearance	Clear, colorless to slightly yellow solution
Aluminum Content (as Al)	Contact for details
Solvent	Typically in toluene, heptane, or isohexane
Concentration	Contact for details
Activity Test	Meets performance standards for target polymerization

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.