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Formulation

General Purpose Styrene-Isoprene Pressure Sensitive HMA (A) by Eastman Chemical

Applicable Type
Applicable Base Polymer
Applicable Industrial Sectors

Typical Formulation Ingredients

Phase
Ingredient
Parts by weight
Styrene isoprene copolymer (Kraton D-1160, Kraton) 
   
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    Hydrocarbon resin tackifier (Piccotac 1095-N, Eastman Chemical) 
       
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    Naphthenic oil (Shellflex 451 FC, Shell) 
       
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    Antioxidant (Irganox 1010, BASF) 
       
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    Typical Properties

    Properties
    Rolling ball tack, cm 
       
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    Shear adhesion to cardboard, minutes at 70°C and 0.5 kg 
       
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    Shear adhesion to steel, minutes @ 23°C and 2.5 kg 
       
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    Peel adhesion to steel (N/25 mm) 
       
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  • Applicable Base Polymer Properties

    Styrene block copolymers (SBCs) offer cohesion, strength, and heat resistance for both pressure sensitive adhesives (PSAs) and non-pressure sensitive adhesives. The styrene phase forms a physically crosslinked network in the adhesive at room temperature. Of the SBCs, styrene butadiene (SB) has the highest shear strength and moderately good peel strength. Styrene isoprene (SI) has the highest peel strength although it is cohesively weaker than the SB resins.

    Resulting Properties

    These hot melt pressure sensitive adhesive formulations have good tack and shows good melt stability. Formula A provides good shear adhesion and tack. They should find application in cardboard packaging, tapes and labels, and where solvent free coatings provide economic or environmental advantages.

    Source: Eastman Chemical

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