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公开(公告)号：US20190309138A1
公开(公告)日：2019-10-10
申请号：US16314098
申请日：2017-07-28
Applicant: Versalis S.p.A.
Inventor： Giovanni CUDER , Stefano COMBA
Abstract: The present invention relates to an expandable polymeric composition that comprises: a) from 60% to 88% by weight of a vinyl aromatic polymer and/or copolymer, calculated respect to (a)+(b); b) from 12% to 40% by weight of a block copolymer, containing at least one vinyl aromatic polymer and/or copolymer and at least one hydrogenated diene polymer, calculated respect to (a)+(b); c) from 3 parts to 10 parts by weight of a blowing agent, calculated on 100 parts of (a)+(b).
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2.发明申请公开(公告)号：US20190315937A1
公开(公告)日：2019-10-17
申请号：US16314047
申请日：2017-07-28
Applicant: Versalis S.p.A.
Inventor： Giovanni CUDER , Stefano COMBA , Aldo LONGO
Abstract: The present invention relates to polymeric compositions that can be used for producing packaging with dynamic cushioning, with a pleasant touch, with reduced abrasive power, in which the expanded particles constituting the packaging adhere well to one another and do not come detached during use. Said compositions comprise: a) from 70% to 90% by weight of a vinyl aromatic polymer and/or copolymer, calculated with respect to (a)+(b); b) from 10% to 30% by weight of an ethylene-vinyl acetate copolymer (EVA) containing a percentage that ranges from 10% to 30% by weight of vinyl acetate, calculated with respect to (a)+(b); c) from 3 to 10 parts by weight of a blowing agent, calculated on 100 parts of component a) added to component b); said copolymer (b) being distributed in the polymer (a) in the form of particles having an average volumetric diameter ranging from 1 nm to 2000 nm. The compositions described and claimed do not include styrene-butadiene or styrene-isoprene block copolymers, hydrogenated or non-hydrogenated; thermoplastic polyurethanes, polystyrene-butadiene grafted polymers or styrene core-shell polymers.
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