Metallocene polymerization co-catalyst

Methylaluminoxane（MAO）

Methallocene co-catalyst for olefin polymerization

Methylaluminoxane (MAO) is used as a catalytic activator for transition metal complexes (metallocenes) in the polymerization of olefins such as ethylene and propylene.
Tosoh Finechem offers MAO, the most suitable auxiliary catalyst for metallocenes. It is produced by applying the alkyl aluminum and organometallic manufacturing technologies that we have cultivated over the years.

メチルアルミノキサン（MAO）

Main Uses

TMAO®-312 Polymethylaluminoxane (PMAO): Product name TMAO®-312

  • Linear low-density polyethylene (LLDPE)
  • Syndiotactic polystyrene (SPS)

Solid methylaluminoxane (SMAO): Product name SMAO

  • High-density polyethylene (HDPE)

Modified methylaluminoxane (MMAO): Product names MMAO-3A, TMAO®-341

  • Polyolefin elastomers (POE)
  • Polyolefin plastomers (POP)
  • Ethylene propylene diene monomer rubber (EPDM)

Feature

img_pu_,mao_03MAO is obtained by partial hydrolysis of trimethylaluminum (TMAL/TMA) and consists of three types of product groups—PMAO, SMAO, and MMAO—each with a different manufacturing process and performance characteristics.

PMAO is a standard catalyst synthesized exclusively from TMAL/TMA. Soluble in aromatic hydrocarbon solvents such as toluene and xylene, PMAO is used in solution polymerization or as a supported catalyst on metal oxides such as silica and alumina. Its key application is in the vapor phase polymerization of LLDPE utilizing metallocene catalysts.

SMAO is a solid catalytic MAO developed using our proprietary technology. Higher activity can be expected compared to silica-supported MAO. It is stable at room temperature and has the same polymerization activity as at the time of manufacture even after having been stored for three months at 50°C.
(In-house test values)
It is mainly used in the slurry polymerization of metallocene-HDPE.
Patent No. 5611833, "Solid polymethylaluminoxane composition and manufacturing method thereof”
Patent No. 6159049, "Solid MAO composition containing AI2O3 and manufacturing method thereof”

MAO写真

 

MMAO is a product synthesized from TMA and triisobutylaluminum (TIBAL). It has excellent solubility in aliphatic hydrocarbon solvents such as hexane and heptane and is effective in the production of resins that shun aromatic solvents.
We also offer a grade (TMAO-341) that achieves the same activity as PMAO in aliphatic hydrocarbon solvents by adjusting the Me/iBu ratio.
Patent 3914502, "Preparation of modified methylaluminoxane co-catalyst in olefin polymerization"

MAOグラフ

Basic Information

PMAO（Product name TMAO®-312）

Chemical Name Polymethylaluminoxane Structural Formula PMAO
Molecular Weight (58.02)ｎ CAS No. 949495-39-0
TSCA Registered EC No. Unregistered

SMAO（Product name SMAO）

Chemical Name Methylaluminoxane(Solid type) Structural Formula SMAO-1
Molecular Weight (58.02)ｎ CAS No. 949495-39-0
TSCA Registered EC No. Unregistered

MMAO（Product names MMAO-3A, TMAO®-341）

Chemical Name Ｍodifed methylaluminoxane Structural Formula MMAO-2-1
Molecular Weight (58.02)m(100.10)n CAS No. 146905-79-5
TSCA Registered EC No. Unregistered

General Properties

PMAO（Product name TMAO®-312）

Appearance Colorless to Pale Yellow Liquid Boiling Point 111℃(Toluene)
Melting Point -98℃(Toluene) Flash Point -29.1℃
Specific Gravity and Density No Data

General Properties

SMAO（Product name SMAO）

Appearance Slurry Boiling Point 111℃(Toluene)
Melting Point -98℃(Toluene) Flash Point 6℃(Toluene)
Specific Gravity and Density No Data

General Properties

MMAO（Product names MMAO-3A, TMAO®-341）

Appearance Clear to Slighly Cloudy Liquid Boiling Point 66～70℃(Hexane)
Melting Point No Data Flash Point -22℃以下(Hexane)
Specific Gravity and Density No Data

Notes on Handling

  • Wear appropriate protective equipment (aluminum-coated emergency clothing, emergency mask, safety glasses, and protective gloves) and handle carefully in an inert gas atmosphere such as nitrogen gas.
  • Do not allow it to come in contact with air or water.
  • In case of exposure to the skin, immediately remove contaminated clothing while rinsing with large amounts of water, and also rinse the contact area. After further washing with soap and plenty of water, seek immediate medical attention.
  • In case of eye contact, rinse eyes thoroughly and follow doctor’s orders.
  • Store in a metal container filled with nitrogen gas, out of direct sunlight, in a cool, well-ventilated place with no sources of ignition.
  • Use containers made of steel, stainless steel, or other types of metal.
  • Under Japan’s Fire Service Act, it is classified as a hazardous material, Category IV, Class I petroleum (non-water soluble), and must be stored and preserved in accordance with this standard.

Packaging

  • 0.4L, 1L stainless steel lecture bottle
  • 10L, 20L, 100L steel cylinder
  • 1.45m3 special steel cylinder
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