New advances in pressure sensitive adhesives offers cost savings, flexibility to tape manufacturers

Kraton Polymers LLC (USA), a leading global producer of engineered polymers, announces new advances in pressure sensitive adhesives for the tape market. According to the company, it is now possible to blend Kraton styrene-isoprene-butadiene-styrene (SIBS) and styrene-butadiene-styrene (SBS) polymers with rosin ester tackifying resins. The initial testing indicates the unique combination of Kraton SIBS and SBS with a rosin ester can produce a tape with properties similar to a traditional SIS and C5 hydrocarbon resin formulation, resulting in a system cost savings of 10% to 20%. The SIBS product is more compatible with the SBS, allowing higher concentrations of the lower cost SBS in tape formulations while maintaining excellent pressure sensitive performance. In addition, rosin esters typically have a cost advantage over traditional hydrocarbon resins. Kraton Polymers currently manufactures two commercial SIBS grades (Kraton D1170 polymers and Kraton D1171 polymers), which are highly compatible with diverse ranges of formulating ingredients, including tackifying resins, plasticizers, fillers and additives. These polymers are characterized by their high cohesive strength, colorless appearance and excellent heat stability. Kraton SIBS polymers are conveniently offered in free-flowing pellet form which can be compounded and blended in mixing equipment commonly used with typical styrenic block copolymers. The result of Kraton Polymers' efforts is a new class of polymers that targets performance, cost effectiveness and process efficiency for emerging tape applications.
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