US 12,297,321 B2
Poly(ether ketone ketone) (PEKK) composites
Chantal Louis, Alpharetta, GA (US); James Pratte, Wilmington, DE (US); and Craig Swanson, Roswell, GA (US)
Assigned to SOLVAY SPECIALTY POLYMERS USA, LLC, Alpharetta, GA (US); and Cytec Industries Inc., Princeton, NJ (US)
Appl. No. 17/055,237
Filed by SOLVAY SPECIALTY POLYMERS USA, LLC, Alpharetta, GA (US); and CYTEC INDUSTRIES INC., Princeton, NJ (US)
PCT Filed Jun. 17, 2019, PCT No. PCT/EP2019/065909
§ 371(c)(1), (2) Date Nov. 13, 2020,
PCT Pub. No. WO2019/243270, PCT Pub. Date Dec. 26, 2019.
Claims priority of provisional application 62/688,065, filed on Jun. 21, 2018.
Claims priority of application No. 18184039 (EP), filed on Jul. 17, 2018.
Prior Publication US 2021/0253793 A1, Aug. 19, 2021
Int. Cl. C08G 65/46 (2006.01); C08G 61/12 (2006.01); C08G 65/40 (2006.01); C08K 3/04 (2006.01); C08K 7/06 (2006.01); C08K 7/14 (2006.01)
CPC C08G 65/46 (2013.01) [C08G 61/127 (2013.01); C08K 3/04 (2013.01); C08K 7/06 (2013.01); C08K 7/14 (2013.01); C08G 65/4012 (2013.01); C08G 2261/3442 (2013.01); C08G 2261/71 (2013.01); C08G 2650/40 (2013.01)] 12 Claims
 
1. A method of increasing the melt stability of an unneutralized poly(ether ketone ketone) (PEKK) polymer powder comprising:
washing the unneutralized poly(ether ketone ketone) (PEKK) polymer powder with a solution including an acid or base to form a neutralized PEKK polymer,
wherein the unneutralized PEKK polymer has a residual acidity of greater than 10 μeq/g or a residual basicity greater than −24 μeq/g; and
wherein,
the acid is selected from the group consisting of acetic acid, mono alkali metal citrates, alkali or alkaline earth metal dihydrogenphosphates, and combinations thereof,
the base is selected from the group consisting of organic amines, tetraalkylammonium hydroxides, tetraalkylammonium acetates, tetraalkylphosphonium hydroxides, tetraalkylphosphonium acetates, alkali or alkaline earth metal hydroxides, alkali or alkaline earth metal monohydrogenphosphates, alkali or alkaline earth metal phosphates, and combinations thereof; and
if the residual acidity is greater than 10 μeq/g, the solution includes the base and the washing reduces the residual acidity of the unneutralized PEKK polymer to less than or equal to 10 μeq/g;
if the residual basicity is greater than −24 μeq/g, the solution includes the acid and the washing reduces the residual basicity of the unneutralized PEKK polymer to less than or equal to −24 μeq/g.