Energy savings plus mechanical reinforcement and rheology control

Hot Melt Styrene-Isoprene-Styrene PSA for General Purpose Labels by Kraton

Adhesives Formulation

Applicable Type

Hot-melt Adhesives

Applicable Base Polymer

Styrene Block Copolymers, SBC (SBS, SEBS, SEPS, SIS)

Applicable Industrial Sectors

Tapes

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-isoprene-styrene (SIS) is most often used in hot melt PSAs. SIS polymers are generally preferred over styrene-butadiene-styrene (SBS) polymers for hot melt adhesives because the SIS polymers provide a higher level of tack and are less likely to form gels during processing.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Styrene-isoprene-styrene copolymer (Kraton D-1163, Kraton)

xxx

Hydrocarbon resin tackifier (Piccotac 95, Eastman Chemical)

xxx

Naphthenic oil (Shellflex 371, Shell)

Antioxidant (Irganox 1010, BASF)

Typical Properties

Properties

Melt viscosity @ 177°C, Pas

Rolling ball tack, cm

xxx

Polyken probe tack, kg

xxx

Loop tack, N/m

xxxx

180° Peel, N/m

xxxx

Shear adhesion failure temperature to Mylar (SAFT),°C

Shear adhesion failure temperature to Kraft (SAFT),°C

Holding power to steel, min

xxx

Holding power to Kraft, min:

Processing

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Resulting Properties

A typical general purpose styrene-isoprene-styrene hot melt pressure sensitive adhesive is provided above. It can be used for tapes and labels and for bonding low energy surfaces such as plastic films. It has good tack and peel strength, and moderate temperature resistance.