US 12,247,099 B2
Process for preparing particles of polyphenylene sulfide polymer
Stéphane Jeol, Saint-Genis-Laval (FR); Kelly D. Branham, Woodstock, GA (US); and David Blake Roller, Dunwoody, GA (US)
Assigned to SOLVAY SPECIALTY POLYMERS USA, LLC, Alpharetta, GA (US)
Filed by SOLVAY SPECIALTY POLYMERS USA, LLC, Alpharetta, GA (US)
Filed on Jan. 5, 2024, as Appl. No. 18/404,978.
Application 18/404,978 is a division of application No. 16/619,389, granted, now 11,905,364, previously published as PCT/EP2018/062425, filed on May 14, 2018.
Claims priority of provisional application 62/516,387, filed on Jun. 7, 2017.
Claims priority of application No. 1718614 (EP), filed on Aug. 3, 2017.
Prior Publication US 2024/0182635 A1, Jun. 6, 2024
Int. Cl. C08G 63/688 (2006.01); B29B 9/10 (2006.01); B29C 64/153 (2017.01); B33Y 70/00 (2020.01); C08G 63/16 (2006.01); B29K 71/00 (2006.01)
CPC C08G 63/6886 (2013.01) [B29B 9/10 (2013.01); B29C 64/153 (2017.08); C08G 63/16 (2013.01); B29K 2071/00 (2013.01); B33Y 70/00 (2014.12)] 5 Claims
OG exemplary drawing
 
1. Particles of polyphenylene sulfide polymer (PPS) obtained by the process comprising the steps of:
melt-blending a mixture (M) comprising:
a) at least one PPS, and
b) at least one water-dispersible polyester polymer (PE) comprising units from:
at least one aromatic dicarboxylic acid component comprising:
at least one aromatic dicarboxylic acid selected from the group consisting of isophthalic acid (IPA), terephthalic acid (TPA), naphthalenedicarboxylic acid, 4,4′-bibenzoic acid, 2,5-pyridinedicarboxylic acid, 2,4-pyridinedicarboxylic acid, 3,5-pyridinedicarboxylic acid, 2,2-bis(4-carboxyphenyl) propane, bis(4-carboxyphenyl) methane, 2,2-bis(4-carboxyphenyl) hexafluoropropane, 2,2-bis(4-carboxyphenyl) ketone, 4,4-bis(4-carboxyphenyl) sulfone, 2,2-bis(3-carboxyphenyl) propane, bis(3-carboxyphenyl) methane, 2,2-bis(3-carboxyphenyl) hexafluoropropane, 2,2-bis(3-carboxyphenyl) ketone, bis(3-carboxyphenoxy) benzene, and mixtures thereof, and
an aromatic dicarboxylic acid containing at least one SO3M group attached to an aromatic nucleus, wherein M is H or a metal ion selected from the group consisting of sodium, lithium and potassium,
at least one diol component wherein the at least one diol is selected from the group consisting of ethylene glycol, diethylene glycol, 1,4-cyclohexanedimethanol, propane-1,2-diol, 2,2-dimethyl-1,3-propanediol and mixtures thereof, and at least 50 mol. % of the diol component, this proportion being based on the total number of moles of the diol component, is the diethylene glycol, and
processing the mixture (M) into pellets or strands,
cooling the pellets or strands at a temperature below 80° C.,
contacting said pellets or strands with water, optionally heated to a temperature up to 95° C. to provide particles,
recovering the particles,
optionally drying the particles, and
optionally sieving the particles;
wherein the step of melt-blending takes place at a temperature above 250° C. and the particles of PPS have a D50 comprised between 5 μm and 100 μm, a bulk density of at least 0.45 and a tapped density of at least 0.55.