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Hydrogenated Styrenic Block Copolymer Offers Benefits in PSAs

SpecialChem / Apr 30, 2003

KRATON Polymers pioneered the styrene block copolymer (SBC) technology in the 1960s and has since been leading innovative developments in the field of SBCs. These copolymers are constructed using anionic polymerization technique that allows a high degree of precision in engineering molecular architectures[2]. As a result, new structures are being continually developed that show unique properties in applications such as adhesives, sealants, coatings and films[3]. The focus of this article is on the potential of a novel hydrogenated KRATON polymer, called KRATON GRP-6924, for pressure sensitive adhesives (PSAs) in tapes and labels. Application of this new polymer in adhesive formulations for nonwovens has been presented previously also[4]. Polystyrene blocks on both ends of a rubber mid-block. The rubber mid-block is typically a polydiene, either polybutadiene or polyisoprene, resulting in the well-known families of KRATON D grades, namely SBS and SIS polymers, or un-hydrogenated styrenic block copolymers (USBC).

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