Energy savings plus mechanical reinforcement and rheology control

Metallocene Polyolefin HMA for Wood & Furniture Industry ((EVA Base)

Adhesives Formulation

Applicable Type

Hot-melt Adhesives

Applicable Base Polymer

Metallocene Catalysts

Applicable Industrial Sectors

Wood & Related Industries

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

The raw material price
Formulations are somewhat more difficult to process than conventional hot melts.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Metallocized polyolefin copolymer (Affinity EG 8200, Dow)

xxxx

Metallocized polyolefin copolymer (Affinity GA 1950, Dow)

xxxx

Metallocized polyolefin copolymer (Affinity GA 1900, Dow)

xxxx

Antioxidant (Irganox 1076, BASF)

xxx

Antioxidant (IrganoxTNPP, BASF)

xxx

Hydrocarbon tackifier (Escorez 5320, ExxonMobil)

xxxx

Typical Properties

Properties

Odor

xxxxxx

Maximum tensile strength, MPa

xxx

Elongation at break, %

xxx

Processing

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Resulting Properties

The above formulation can produce high quality hot melt adhesive that is preferable to EVA adhesive for wood bonding and particularly profile bonding in the furniture industry. Past mPO polyolefins could not be used in this application due to insufficient cohesion and insufficient open times or processing times. The above formulation provides a nonreactive hot melt adhesive based on mPO polymer that solves these problems.

(Source: US Patent Application 2008/0190541, August 14, 2008.)

Metallocene Polyolefin HMA for Wood & Furniture Industry ((EVA Base)

Applicable Base Polymer Properties

Typical Formulation Ingredients

Typical Properties

Processing

Resulting Properties

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