Energy savings plus mechanical reinforcement and rheology control

Metallocene Catalyzed Polyolefin HMA for Plastic Bonding by Clariant

Adhesives Formulation | Supplied by Clariant

Applicable Type

Hot-melt Adhesives

Applicable Base Polymer

Polyolefins

Applicable Base Polymer Properties

Metallocene catalysts have been developed to produce polyolefins with precisely tailored properties. The attributes of metallocene catalyzed polyolefin (mPO) in hot melt adhesives are summarized below:

Increased mileage due to low density
Reduced gel and char formation in tanks, hoses, and nozzles for low maintenance and odor
Reduced stringing and spider webbing
Improved thermal stability and viscosity
Wide service temperature range
Good color / clarity
Clean machining
High adhesion to hard-to-bond substrates
Good compatibility with conventional plasticizing and tackifying agents

The major restraints of metallocene catalyzed polyolefin HMAs are (1) the raw material price and (2) formulations are somewhat more difficult to process than conventional hot melts.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Metallocene polypropylene (Licocene PP-1302, Clariant)

Hydrocarbon tackifier (Regalite 9100, Eastman Chemical)

Amorphous polyalpha-olefin (Vestoplast 828, Evonik)

Typical Properties

Properties

Brookfield viscosity at 170°C (mPas)

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Processing

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Resulting Properties

Metallocene catalysts offer unique advantages versus conventional catalysts. They allow producing consistent, controllable molecular structures that can be designed to:

Improve toughness and impact resistance
Provide low off-taste and odor
Allow tailoring of processing characteristics to fit the conversion process
Eliminate non-targeted molecular weight species in resins
Offer a greater control of molecular weight distribution (MWD)

This formulation -"Metallocene Catalyzed Polyolefin HMA for Plastic Bonding by Clariant" will produce a water-white HMA with good adhesion to hard to bond plastic substrates such as PP, PS, PET, PC, PMMA, etc.; wood; aluminum; and various other metals. The adhesive has good resistance to many chemicals and oils.