Energy savings plus mechanical reinforcement and rheology control

SBR Hot Melt Pressure Sensitive Adhesive

Adhesives Formulation

Applicable Type

Hot-melt Adhesives

Applicable Base Polymer

Styrene Copolymers (SBR …)

Applicable Industrial Sectors

Labels / Signs / Decals , Tapes

Applicable Base Polymer Properties

Styrene butadiene rubber high-quality elastomers are often combined with natural rubber to make solvent-based adhesives for masking tapes, labels, cloth tapes, and duct tape. Offering cost-effective tack, shear and peel strength performance where UV resistance is not required, they are manufactured with a consistent molecular weight and viscosity, which enables formulators to achieve a consistent formulation. The above formulation is for a solid (solventless) hot melt adhesive.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Styrene-isoprene block copolymer (Kraton 1107, Kraton)

xxx

Tackifier (Escorez 5320, ExxonMobil)

xxx

Oil (Shellflex 17, Shell Chemicals)

Butyl zimate accelerator (Vanderbilt Chemicals)

Typical Properties

Properties

Solids content, %

xxx

Initial Brookfield viscosity at 175°C, cps

xxxxx

Brookfield viscosity at 175°C, cps (Aged 72 hrs at 150°C)

xxxxx

Rolling ball tack, cm

xxx

180° Peel adhesion (12 inches per min to steel), oz / inch

20° Hold ( ½ inch x ½ inch contact area, 400 gm load), minutes

Processing

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Resulting Properties

Linear, non-crosslinked SBR polymers are the technologies of choice when a good balance of adhesion, cohesion, and tack is required. The butadiene in both materials stiffens as it ages to offset the rubber’s softening over time. These light-colored, low-gel polymers are suitable for general-purpose pressure-sensitive adhesives or as laminating adhesives. This formulation has somewhat higher holding power than comparative resins and good melt stability upon aging.

Source: Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 297.