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Styrenic Copolymers Boost Heat Resistance in PSAs

SpecialChem / Jul 3, 2002

Since their first commercialization in the 1960s, styrenic block copolymers (SBC) have been the focus of continuous new developments for applications including adhesives, compounded rubber, footwear, thermoplastic-polymer modification, asphalt modification, motor oil additives, films and coatings. And it's no wonder. SBCs are synthesized via anionic polymerization, which allows a high degree of precision in engineering molecular architectures. So far, more than 600 patents in the United States and more than 3,200 patents in countries outside the United States have been issued for KRATON polymers, their manufacturing processes and their product applications. More than 80 of those are in the area of pressure sensitive adhesive (PSA) applications. Two innovative crosslinking methods to be discussed here -- one with a chemical crosslinker, the other with radiation -- have been developed by KRATON Polymers to significantly increase the temperature resistance of PSAs, opening the door to much broader applications for PSAs including under-the-hood uses and other environments where resistance to high temperatures is crucial.

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