公开(公告)号：US20240376311A1

公开(公告)日：2024-11-14

申请号：US18286011

申请日：2022-03-31

Applicant: ARKEMA FRANCE

Inventor： Thibaut SAVART ,  Lise DEVES ,  Jean-Jacques FLAT ,  Florent ABGRALL

IPC: C08L77/06 ,  C08G69/14 ,  C08G69/36 ,  C08G69/48 ,  C08J5/04 ,  C08K3/32 ,  C08K5/521 ,  C08K7/06

Abstract: A thermoplastic composite material including: a) from 65% to 95% by weight of at least one reactive semicrystalline polyamide prepolymer with an average molecular mass Mn of less than or equal to 8000 g/mol and having a volume-mean diameter D50 of the reactive semicrystalline polyamide prepolymer powder particles ranging from 10 to 300 μm, b) from 5% to 35% by weight of at least one flame retardant chosen from an at least partially meltable flame retardant in powder form and a non-meltable flame retardant in premilled powder form with a volume-mean diameter D50 of from 1 to 50 μm, and c) from 0 to 2% by weight of at least one meltable or non-meltable additive with a volume-mean diameter D50 of from 1 to 50 μm if it is non-meltable and in powder form.

公开(公告)号：US20220081520A1

公开(公告)日：2022-03-17

申请号：US17416098

申请日：2019-12-17

Applicant: Arkema France

Inventor： Gilles HOCHSTETTER ,  Lise DEVES ,  Mathieu CAPELOT ,  Thierry BRIFFAUD ,  Yves DEYRAIL

IPC: C08J5/04

Abstract: The present invention concerns an impregnated fibrous material comprising at least one continuous-fiber fibrous material in the form of a roving or a plurality of parallel rovings and at least one thermoplastic polymer matrix, characterized in that said at least one thermoplastic polymer is an amorphous or semi-crystalline polymer having a glass transition temperature such that Tg≥40° C., especially Tg≥100° C., in particular ≥120° C., the fiber content of said impregnated fibrous material being from 45 to 65% by volume, preferably from 50 to 60% by volume, especially from 54 to 60% by volume, the number-average molecular mass Mn of said thermoplastic polymer being from 11,000 to 25,000 g/mol, the melt viscosity of said thermoplastic polymer being from 80 to 1500 Pa·s, as measured by plane-plane rheology at 1 Hz and 2% deformation, at a temperature of Tg+220° C.

公开(公告)号：US20230080953A1

公开(公告)日：2023-03-16

申请号：US17798675

申请日：2021-02-23

Applicant: ARKEMA FRANCE

Inventor： Thibaut SAVART ,  Lise DEVES ,  Gilles HOCHSTETTER

IPC: C08J5/24 ,  B29B15/12 ,  C08L77/06

Abstract: The use of a composition including a mixture of at least one non-reactive thermoplastic polymer of Tg >40° C., especially >100° C., in particular >120° C., and at least one reactive thermoplastic prepolymer, with a fibrous material, for the preparation of a fibrous material impregnated with the composition, the composition having an initial melt viscosity during the impregnation, as measured in plate-plate rheology under 1 Hz and 2% strain, at a temperature of 300° C., of less than the viscosity of the same composition devoid of reactive prepolymer, measured under the same conditions, and/or a ductility, after in situ polymerization of the reactive thermoplastic prepolymer in the composition during the impregnation and after the impregnation, that is at least equivalent to the ductility of the same composition devoid of non-reactive thermoplastic polymer, and of which said reactive thermoplastic prepolymer is polymerized to the same number-average molecular mass (Mn).

公开(公告)号：US20240376264A1

公开(公告)日：2024-11-14

申请号：US18286048

申请日：2022-03-31

Applicant: ARKEMA FRANCE

Inventor： Thibaut SAVART ,  Lise DEVES ,  Jean-Jacques FLAT ,  Florent ABGRALL

IPC: C08G69/26 ,  C08G69/28 ,  C08G69/36 ,  C08J5/24

Abstract: A composition for a thermoplastic composite material including: a) from 65% to 95% by weight of at least one reactive semicrystalline polyamide prepolymer with an average molar mass Mn of less than 5000 g/mol and having a volume-mean diameter D50 of the reactive semicrystalline polyamide prepolymer powder particles ranging from 10 to 300 μm, b) from 5% to 35% by weight of at least one flame retardant chosen from an at least partially meltable flame retardant in powder form and having a volume-mean diameter D50 of from 10 to 300 μm, and a non-meltable flame retardant in premilled powder form with a volume-mean diameter D50 of from 1 to 50 μm, and c) from 0 to 2% by weight of at least one additive, and said reactive polyamide prepolymer comprising or consisting of at least one Z/BACT/XT copolyamide.