	US 11,851,526 B2
	Poly(ether ketone ketone) polymer powder having a low volatiles content
Chantal Louis, Alpharetta, GA (US); and Scott A. Harding, Alpharetta, GA (US)
Assigned to SOLVAY SPECIALTY POLYMERS USA, LLC, Alpharetta, GA (US)
Appl. No. 16/624,281
Filed by SOLVAY SPECIALTY POLYMERS USA, LLC, Alpharetta, GA (US)
PCT Filed Jul. 2, 2018, PCT No. PCT/EP2018/067807 § 371(c)(1), (2) Date Dec. 18, 2019, PCT Pub. No. WO2019/002620, PCT Pub. Date Jan. 3, 2019.
Claims priority of provisional application 62/527,718, filed on Jun. 30, 2017.
Prior Publication US 2021/0147625 A1, May 20, 2021
Int. Cl. C08G 65/40 (2006.01); C08J 3/12 (2006.01); B33Y 70/00 (2020.01); B33Y 80/00 (2015.01)

CPC C08G 65/4056 (2013.01) [C08J 3/12 (2013.01); B33Y 70/00 (2014.12); B33Y 80/00 (2014.12); C08G 2650/40 (2013.01); C08J 2371/10 (2013.01)]

23 Claims

1. A polymer powder comprising at least one poly(ether ketone ketone) (PEKK) polymer, wherein the PEKK polymer comprises at least 95 mol. % of recurring units of formulas (M′) and (P′), the mol. % being based on the total number of moles in the polymer:

wherein the PEKK polymer has a Td(1%) of at least 500° C., as measured by thermal gravimetric analysis according to ASTM D3850, heating from 30° C. to 800° C. under nitrogen using a heating rate of 10° C./min,

wherein the powder has a d_0.9-value less than 150 μm, as measured by laser scattering in isopropanol,

wherein the powder has a bulk density ρB of at least 0.40, and

wherein the powder is prepared by a method comprising the following steps:

Step a) polycondensing monomers (P′—OH), (M′-OH), (P′—F), and/or (M′-F), in a solvent:

wherein a molar ratio of moles of (P′—OH) and (M′-OH) to moles of (P′—F) and (M′-F) is such that:

step b) extracting the solvent and salts, in order to obtain a powder, and

step c) grinding the powder of step b) such that the powder comprises a d_0.9-value of less than 150 μm, as measured by laser scattering in isopropanol.