公开(公告)号：US20170029732A1

公开(公告)日：2017-02-02

申请号：US15102138

申请日：2014-12-05

Applicant: VERSALIS S.P.A. ,  ENI S.P.A.

Inventor： Paolo MARIANI ,  Michela AGNOLI ,  Alessandro CASALINI ,  Massimo MERLINI

IPC: C10L1/197 ,  C10L10/16 ,  C08L23/08

CPC classification number: C10L1/1973 ,  C08L23/0853 ,  C08L2205/025 ,  C10L10/16 ,  C10L2230/14 ,  C10L2250/04 ,  C10L2300/20 ,  C10L2300/30

Abstract: A polymeric composition suitable for lowering the Pour Point of paraffinic crude oils comprising a synergic mixture including at least two ethylene-vinyl acetate copolymers respectively having an average molecular weight Mw lower than 130,000 Dalton (measured via GPC), a content of vinyl acetate monomer ranging from 15 to 50% by weight, with the proviso that the content of vinyl acetate monomer in the respective copolymers differs from one copolymer to another, by over 5%, on a weight basis.

Abstract translation: 适用于降低石蜡原油倾点的聚合物组合物，其包含协同混合物，其包括分别具有低于130,000道尔顿（通过GPC测量）的平均分子量Mw的至少两种乙烯 - 乙酸乙烯酯共聚物，乙酸乙烯酯单体的含量范围 15至50重量％，条件是各共聚物中的乙酸乙烯酯单体的含量不同于一种共聚物，按重量计超过5％。

公开(公告)号：US20200291191A1

公开(公告)日：2020-09-17

申请号：US15779686

申请日：2016-12-02

Applicant: versalis S.p.A. ,  ENI S.p.A.

Inventor： Alessandro CASALINI ,  Michela AGNOLI ,  Paolo MARIANI ,  Romano LIMA ,  Massimo MERLINI

IPC: C08J3/03 ,  C08L23/08 ,  C10L1/14 ,  C10L1/196 ,  C10L1/197 ,  C10L10/16

Abstract: The present invention relates to an aqueous emulsion comprising: a) from 50% to 60% of an organic phase dispersed in an aqueous phase, said organic phase containing a mixture including from 24% to 30%, calculated with respect to the final emulsion, of ethylene-vinyl acetate copolymers and/or polyalkyl(meth)acrylates, indicated in the present description as polymeric component, and a high-boiling organic solvent, or a mixture of said solvents; b) a primary emulsifier at a concentration higher or equal to 0.1% and lower than or equal to 3% by weight, calculated with respect to the final emulsion; c) from 37% to 47% of an aqueous phase; wherein the ratio between said polymer component and said organic solvent in the final aqueous emulsion is at least 1/1 and where the organic solvent and any polymer of the polymeric component have a Hildebrand solubility parameter δ such that, the difference (δsolvent_δpolymer) is lower than 2 in absolute value for any polymer of the polymeric component.

公开(公告)号：US20240317906A1

公开(公告)日：2024-09-26

申请号：US18575083

申请日：2022-06-28

Applicant: VERSALIS S.P.A.

Inventor： Alessandro CASALINI ,  Aldo LONGO ,  Emilj SONCIN ,  Nicola FIOROTTO

IPC: C08F12/08

CPC classification number: C08F12/08

Abstract: Continuous mass polymerisation process for the preparation of vinyl aromatic polymers includes:



continuously feeding at least one vinyl aromatic monomer and at least one radical initiator to a mixing device, obtaining a reaction mixture;
feeding the reaction mixture to a Continuous Stirred Tank Reactor (CSTR) and in liquid phase leaving the CSTR to at least one Plug Flow Reactor (PFR);
recycling, to the mixing device, a fraction of the reaction mixture in liquid phase leaving the at least one PFR, the fraction between 25% and 50% by mass with respect to total mass of reaction mixture in liquid phase leaving the at least one PFR;
feeding the remaining fraction of the reaction mixture in liquid phase leaving the at least one PFR, to a devolatilisation system; and
feeding the polymer leaving the devolatilisation system or additive system, to a granulation system and recovering the polymer.

公开(公告)号：US20180148631A1

公开(公告)日：2018-05-31

申请号：US15564079

申请日：2016-04-01

Applicant: Versalis S.p.A. ,  Eni S.p.A.

Inventor： Alessandro CASALINI ,  Attilio ARIENTI ,  Dario GHIDONI ,  Chiara Cecilia PISERI

IPC: C09K8/524

CPC classification number: C09K8/524

Abstract: A mixture comprising: a) from 0% to 95% of aromatic compounds and/or polycyclic aromatic compounds, said polycyclic aromatic compounds, if present, always being in an amount less than 10% with respect to component (a); b) from 0% to 85% of a mixture containing aliphatic compounds and a content of aromatic compounds lower than 30% with respect to (b); c) from 0% to 20% of an acetate component; d) from 1% to 50% of a mixture of compounds containing keto groups; with the proviso that said solvent mixture contains at least three components, one of which is (d) and the other two selected from (a), (b) or (c) and that their sum is always 00%; and with the proviso that said mixture has a solubility, measured with the Hansen parameters, characterized in that the dispersion force component of the solubility δd varies from 17 to 20 Mpâ0.5 the polar force component of the solubility δp varies from 0.65 to 5 Mpâ0.5, and the strength of the hydrogen bond component of the solubility δh varies from 0.65 to 5 MPâ0.5.