Process for preparing particles of aromatic polymers, particles obtainable by said process and their uses
AssigneeSolvay Specialty Polymers USA, LLC
InventorsStéphane Jeol, Kelly D. Branham, David Blake Roller
Life of this patent
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Abstract
The invention relates to a process for preparing polymeric particles, based on the use of a polyester polymer (PE) comprising units from a dicarboxylic acid component and a diol component, wherein at least 2 mol. % of the diol component is a poly(alkylene glycol). The process comprises the melt-blending of the aromatic polymer (P) with the PE, the cooling the blend and the recovery of the particles by dissolution of the PE into water. The present invention relates to polymeric particles obtained therefrom and to the use of these particles in SLS 3D printing, coatings and toughening of thermoset resins.
Claims21
A process for preparing polymeric particles, comprising the following steps:
- melt-blending a mixture (M) comprising:
- a) at least one polymer (P) selected from the group consisting of poly(aryl ether ketone) (PAEK), poly(aryl ether sulfone) (PAES), polyetherimide (PEI), poly(phenyl ether) (PPE), aromatic polyamideimide (PAI) and polyphenylene (PPh), and
- b) at least one polyester polymer (PE) comprising units from:
- at least one dicarboxylic acid component,
- at least one diol component, wherein at least 2 mol. % of the diol component is a poly(alkylene glycol) having a formula (I):
- H(O—CmH2m)n—OH
- wherein m is an integer from 2 to 4 and n varies from 2 to 10,
- 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., optionally supplemented with an acid or a base,
- recovering the particles,
- optionally drying the particles, and
- optionally sieving the particles.
Particles of polymer (P) selected from the group consisting of poly(aryl ether ketone) (PAEK), poly(aryl ether sulfone) (PAES), polyetherimide (PEI), poly(phenyl ether) (PPE), aromatic polyamideimide (PAI), polyphenylene (PP) and blends thereof, the particles being produced by a process comprising:
- melt-blending the polymer (P) with at least one polyester polymer (PE) comprising units from:
- at least one dicarboxylic acid component,
- at least one diol component, wherein at least 2 mol. % of the diol component is a poly(alkylene glycol) having a formula (I):
- H(O—CmH2m)nOH
- wherein m is an integer from 2 to 4 and n varies from 2 to 10, and
- dispersing the PE into water.
Dependencies are inferred from the claim text.