Energy savings plus mechanical reinforcement and rheology control

Styrene-Isoprene-Styrene for Hot Melt Protective Film by Cray Valley

Adhesives Formulation

Applicable Type

Hot-melt Adhesives

Applicable Base Polymer

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

Applicable Industrial Sectors

Automotive

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 styrene (SBS) has the highest shear strength and moderately good peel strength. Styrene isoprene styrene (SIS) has the highest peel strength although it is cohesively weaker than the SBS resins.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Styrene-isoprene-styrene copolymer (15% styrene, 19% diblock)

Tackifier (Wingtack 98, Cray Valley)

Paraffinic oil

Anitoxidant (non-staining)

Typical Properties

Properties

Low peel strength hot melt film that can be applied at relatively low temperatures

Easy release and no transfer after aging

High cohesion

Good wetting properties

Processing

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Resulting Properties

The formulation of Styrene-Isoprene-Styrene for Hot Melt Protective Film has no tack, a minimal number of components and shows good melt stability. The film has excellent adhesion but easy and non-transferable release from the substrate. It also has good flexibility and aging characteristics. It can be used as a protective film for autos, appliances, etc. or as a general purpose assembly adhesive for low stress applications. The source of this formulation is Cray Valley.

Tips and Tricks

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