公开(公告)号：US20210371555A1

公开(公告)日：2021-12-02

申请号：US17052880

申请日：2019-05-08

Applicant: VERSALIS S.P.A.

Inventor： Franco Ghelfi ,  Angelo Ferrando ,  Aldo Longo ,  Mirko Boffagni

IPC: C08F112/08

Abstract: The present invention relates to a polymerization process for the synthesis of vinyl aromatic polymers, in which the sequence of monomers in the chain and the linear, branched soluble, or crosslinked insoluble structure, with reactive or different polarity functions, are controlled. Said process comprises the step of polymerizing vinyl aromatic monomers by means of an Atom Transfer Radical Polymerization (ATRP) reaction with an Activator ReGenerated by Electron Transfer (ARGET), the reaction being carried out at a temperature comprised between 25° C. and 110° C. in an inert gas atmosphere in the presence of a complex catalyst containing a cupric halide and a multidentate amine ligand, feeding to the reaction an organic initiator having two geminal halogens, an alkali metal (bi)carbonate, a solvent pair of an aliphatic alcohol and an acetic ester of the same aliphatic alcohol and possibly ascorbic acid, provided that no initiator is used with three or more active halogens, or polyvinyl monomers or inimers.

公开(公告)号：US09714899B2

公开(公告)日：2017-07-25

申请号：US15027179

申请日：2014-11-18

Applicant: versalis S.p.A.

Inventor： Francesco Bonacini ,  Erik Mantovani ,  Angelo Ferrando

IPC: C08F2/00 ,  C08F4/00 ,  C08F12/02 ,  G01N21/27 ,  G01N21/3577 ,  G01N21/359 ,  G01N21/85 ,  C08F112/08

CPC classification number: G01N21/272 ,  C08F112/08 ,  G01N21/3577 ,  G01N21/359 ,  G01N21/8507 ,  G01N2201/061 ,  G01N2201/0826 ,  G01N2201/13

Abstract: The present invention relates to a method for monitoring a control parameter of a polymerization reaction mixture in heterogeneous phase comprising the following steps: (a) acquiring at least one NIR reflectance spectrum of said mixture; (b) calculating a value of said control parameter by means of a calibration curve which correlates the NIR reflectance spectrum with the values of said control parameter measured with a reference measurement method. The present invention also relates to an apparatus for implementing said method.

公开(公告)号：US11725070B2

公开(公告)日：2023-08-15

申请号：US17052880

申请日：2019-05-08

Applicant: VERSALIS S.P.A.

Inventor： Franco Ghelfi ,  Angelo Ferrando ,  Aldo Longo ,  Mirko Buffagni

IPC: C08F112/08 ,  C08F12/08

CPC classification number: C08F112/08

Abstract: The present invention relates to a polymerization process for the synthesis of vinyl aromatic polymers, in which the sequence of monomers in the chain and the linear, branched soluble, or crosslinked insoluble structure, with reactive or different polarity functions, are controlled. Said process comprises the step of polymerizing vinyl aromatic monomers by means of an Atom Transfer Radical Polymerization (ATRP) reaction with an Activator ReGenerated by Electron Transfer (ARGET), the reaction being carried out at a temperature comprised between 25° C. and 110° C. in an inert gas atmosphere in the presence of a complex catalyst containing a cupric halide and a multidentate amine ligand, feeding to the reaction an organic initiator having two geminal halogens, an alkali metal (bi)carbonate, a solvent pair of an aliphatic alcohol and an acetic ester of the same aliphatic alcohol and possibly ascorbic acid, provided that no initiator is used with three or more active halogens, or polyvinyl monomers or inimers.