	US 11,697,718 B2
	Method for impregnating reinforcing fibres with polyaryletherketones and semi-products obtained therefrom
Benoît Brule, Beaumont-le-Roger (FR); Henri-Alexandre Cayzac, Bernay (FR); Guillaume Le, Hérouville-Saint-Clair (FR); Jerome Pascal, Grandchain (FR); and Fabien Sguerra, Saint Laurent du Var (FR)
Assigned to ARKEMA FRANCE, Colombes (FR)
Appl. No. 16/500,160
Filed by Arkema France, Colombes (FR)
PCT Filed Apr. 5, 2018, PCT No. PCT/FR2018/050856 § 371(c)(1), (2) Date Oct. 2, 2019, PCT Pub. No. WO2018/185440, PCT Pub. Date Oct. 11, 2018.
Claims priority of application No. 1752951 (FR), filed on Apr. 5, 2017.
Prior Publication US 2021/0130557 A1, May 6, 2021
Int. Cl. C08J 5/24 (2006.01)

CPC C08J 5/249 (2021.05) [C08J 2300/22 (2013.01); C08J 2329/10 (2013.01); C08J 2329/12 (2013.01); C08J 2361/18 (2013.01)]

9 Claims

1. A process for preparing a semifinished product comprising a polyaryletherketone (PAEK)-based resin and reinforcing fibers, comprising the stages of:

a. preparing a dispersion comprising the PAEK-based resin in pulverulent form dispersed in an aqueous phase comprising at least one surfactant;

b. bringing the reinforcing fibers into contact with said aqueous dispersion;

c. drying the fibers impregnated with dispersion; and

d. heating the impregnated fibers to a temperature sufficient for the melting of the resin, so as to form a semifinished product,

wherein the surfactant is a thermally stable surfactant which does not increase the weight-average molecular weight of the PAEK-based resin, as measured by size exclusion chromatographic analysis, by more than 20% after the heating stage,

wherein the PAEK resin is a poly(ether ketone ketone) (PEKK) exhibiting a percentage by weight of terephthalic units, with respect to the sum of the terephthalic and isophthalic units, of between 35% and 100%.