US 11,939,438 B2
Method for impregnating reinforcing fibers with polyaryletherketones and semi-finished products obtained in this way
Guillaume Le, Herouville Saint Clair (FR); and Fabien Sguerra, Saint Laurent du Var (FR)
Assigned to ARKEMA FRANCE, Colombes (FR)
Appl. No. 16/648,180
Filed by Arkema France, Colombes (FR)
PCT Filed Sep. 13, 2018, PCT No. PCT/FR2018/052244
§ 371(c)(1), (2) Date Mar. 17, 2020,
PCT Pub. No. WO2019/053379, PCT Pub. Date Mar. 21, 2019.
Claims priority of application No. 1758625 (FR), filed on Sep. 18, 2017.
Prior Publication US 2020/0262989 A1, Aug. 20, 2020
Int. Cl. C08J 5/10 (2006.01); B29B 11/16 (2006.01); C08J 5/04 (2006.01); C08J 5/24 (2006.01); B29K 71/00 (2006.01); B29K 105/00 (2006.01); B29K 307/04 (2006.01)
CPC C08J 5/10 (2013.01) [B29B 11/16 (2013.01); C08J 5/042 (2013.01); C08J 5/243 (2021.05); C08J 5/249 (2021.05); B29K 2071/00 (2013.01); B29K 2105/0005 (2013.01); B29K 2105/0094 (2013.01); B29K 2307/04 (2013.01); C08J 2371/00 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A process for preparing a semifinished product comprising a PAEK-based resin and reinforcing fibers, comprising the steps of:
a. preparing a dispersion comprising a PAEK-based resin in pulverulent form dispersed in an aqueous phase comprising 1%-40% by weight at least one volatile organic compound and a 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 dispersion has a dynamic viscosity, measured at 25° C. under a shear stress of 6.8 s−1 on a Brookfield DV2T Extra viscometer, is between 0.1 and 25 Pa·s; and
wherein the surfactant is present, and its content is less than 1% by weight relative to the mass of dispersed resin.