公开(公告)号：US20200165386A1

公开(公告)日：2020-05-28

申请号：US16630209

申请日：2018-07-16

Applicant: Arkema France

Inventor： Guillaume LE ,  Jérome AMSTUTZ ,  Christophe CAREMIAUX

IPC: C08G65/46 ,  C08G65/40

Abstract: A method for the manufacture of polyether ketone ketone (PEKK), including: (i) reacting 1,4-bis(4-phenoxybenzoyl)benzene and/or diphenylether with at least one difunctional aromatic acyl chloride, in a reaction solvent and in presence of a Lewis acid, to obtain a product mixture comprising a PEKK-Lewis acid complex; (ii) contacting the obtained product mixture with a protic solvent, so as to form a dispersion that includes a liquid phase including Lewis acid and a solid phase including PEKK; and (iii) separating the solid phase from the liquid phase by centrifugal filtration, so as to recover a crude PEKK and a effluent containing Lewis acid, wherein step (iii) includes a step of centrifugal filtration.

公开(公告)号：US20220145039A1

公开(公告)日：2022-05-12

申请号：US17439126

申请日：2020-03-13

Applicant: Arkema France

Inventor： Guillaume LE ,  Benoît BRULE ,  Christophe CAREMIAUX

IPC: C08J11/12 ,  C08K3/32 ,  C09D171/00 ,  C09D7/61 ,  C09D7/48 ,  B29C64/153 ,  B33Y10/00 ,  B33Y70/00

Abstract: A process for the layer-by-layer manufacture of a three-dimensional object by sintering of a powder based on PAEK(s) with electromagnetic radiation, wherein the powder includes at least one PAEK and at least one phosphate, said powder being, at least in part, a recycled powder. The recycled powder is obtainable by continuous or discontinuous heating, over a period of at least six hours, of a powder of the same composition at a constant or nonconstant temperature, strictly between the glass transition temperature, Tg, and the melting temperature, Tm, of the powder. Also, an article obtained by this process and to uses of phosphate(s) in compositions based on PAEK(s).

公开(公告)号：US20190077911A1

公开(公告)日：2019-03-14

申请号：US16038678

申请日：2018-07-18

Applicant: Arkema France

Inventor： Guillaume LE ,  Jérôme AMSTUTZ ,  Christophe CAREMIAUX

IPC: C08G65/40 ,  C08G65/46 ,  C08G75/23

Abstract: A method for the manufacture of polyether ketone ketone (PEKK), including the steps of: reacting 1,4-bis(4-phenoxybenzoylbenzene) and/or diphenylether with at least one difunctional aromatic acyl chloride, in a reaction solvent and in presence of a Lewis acid, to obtain a product mixture including a PEKK-Lewis acid complex; contacting the obtained product mixture with a protic solvent, so as to form a dispersion that includes a liquid phase including Lewis acid and a second phase, e.g., a solid phase, including PEKK; and separating the second phase from the liquid phase by centrifugal filtration, so as to recover a crude PEKK and a effluent containing Lewis acid, wherein step (iii) includes a step of centrifugal filtration.