公开(公告)号：US20200346368A1

公开(公告)日：2020-11-05

申请号：US16958207

申请日：2018-12-21

申请人： VERSALIS S.P.A.

发明人： Riccardo FELISARI ,  Sara GAVIOLI ,  Riccardo INGLESE

IPC分类号： B29B9/06 ,  B29C48/04 ,  B29B9/12 ,  B29C48/00 ,  B29C48/08 ,  B29C48/92 ,  B29C48/25

摘要： Circuit and to a process for managing transients and process and product anomalies in a plant for production of granulated expandable polymers EPS or extruded polymers XPS, said circuit being placed e.g. in a granulation plant along which are positioned: a mixing device suitable for mixing additives and expanding agent within a stream of molten polymer; a granulator or an extrusion device positioned downstream of said mixing device; a deviation valve suitable for molten polymers placed along the line connecting said mixing device to said granulator or to said extrusion device upstream of said granulator or extruder, said deviation valve being provided with at least one inlet (A), a Stand-by position (A→C) and a Run position (A→B), said circuit further comprising a heating device downstream of said valve, a separation device downstream of said heating device suitable for physically separating the blowing agent from the polymer and any additives present therein, and a cooling device positioned between said separation device and said mixing device.

公开(公告)号：US20230265258A1

公开(公告)日：2023-08-24

申请号：US18011451

申请日：2021-06-16

申请人： ENI S.P.A. ,  VERSALIS S.P.A.

发明人： Francesco SCAVELLO ,  Nicola VECCHINI ,  Riccardo FELISARI ,  Armando GALEOTTI ,  Daniele BALDUCCI ,  Stefania GUIDETTI ,  Erica MONTANARI

IPC分类号： C08J11/16 ,  C08K3/26

CPC分类号： C08J11/16 ,  C08K3/26 ,  C08J2323/06 ,  C08J2323/12 ,  C08J2325/06 ,  C08J2327/06 ,  C08J2367/02 ,  C08J2377/00 ,  C08K2003/262

摘要： A plastic composition includes



plastic material free from halogenated components or with a halogen content less than or equal to 0.5% by mass with respect to the plastic material,
oligomers derived from the plastic contained in the plastic material,
halogenated salts, and
hydrocarbon.

公开(公告)号：US20190031852A1

公开(公告)日：2019-01-31

申请号：US16072383

申请日：2017-01-26

申请人： VERSALIS S.P.A.

发明人： Riccardo FELISARI ,  Viviana AUTIERI

IPC分类号： C08J9/00 ,  C01B32/19 ,  C08F112/08 ,  C08K3/04 ,  C08J9/14

摘要： The present invention relates to a composition containing graphene and grafene nanoplatelets durably dispersed in a solvent. Said composition is characterized in that it contains at least 1% by weight, with respect to the total weight of the solvent, of a vinyl aromatic polymer and comprises a mass concentration of graphene and graphene nanoplatelets (GRS) ranging from 0.001% to 10% by weight with respect to the total weight of the solvent. The vinyl aromatic polymer present in the composition is obtained by partial or total polymerization of the relative vinyl aromatic monomer alone or mixed with up to 50% by weight of further copolymerizable monomers. The composition must satisfy the condition that the sum of the possible content of non-reacted monomers and the content of vinyl aromatic polymer formed is equal to at least 10% by weight with respect to the total weight of the solvent.

公开(公告)号：US20240101778A1

公开(公告)日：2024-03-28

申请号：US18520592

申请日：2023-11-28

申请人： VERSALIS S.p.A.

发明人： Riccardo FELISARI ,  Viviana AUTIERI

IPC分类号： C08J9/00 ,  C01B32/19 ,  C08F2/44 ,  C08F12/08 ,  C08F112/08 ,  C08J9/14 ,  C08K3/04

CPC分类号： C08J9/0071 ,  C01B32/19 ,  C08F2/44 ,  C08F12/08 ,  C08F112/08 ,  C08J9/141 ,  C08K3/042 ,  B82Y30/00 ,  C08J2203/14 ,  C08J2203/182 ,  C08J2325/06

摘要： A process for preparing a composition from graphite material by contacting the graphite material with a main solvent comprising at least 10% by weight, with respect to a total weight of the main solvent, of a vinyl aromatic monomer alone or in a mixture up to 50% by weight with additional copolymerizable monomers, thereby forming a starting composition; subjecting to an ultrasound treatment with a frequency spectrum ranging between 18 kHz and 1000 kHz, at a pressure equal to or higher than 2 bar absolute and in a container or sonication chamber wherein no separated phase of fluid at the gaseous phase contacts said composition; and polymerizing at least 1% of the vinyl aromatic monomer present in the main solvent, wherein the composition is at least partially polymerized and contains graphene and graphene nanoplatelets durably dispersed in the solvent, and the composition is without any evident formations of deposits or separated phases for at least 30 days.