WO2018224246A1 - Procédé pour la préparation de particules de polymères aromatiques, particules pouvant être obtenues par ledit procédé et leurs utilisations - Google Patents

Procédé pour la préparation de particules de polymères aromatiques, particules pouvant être obtenues par ledit procédé et leurs utilisations Download PDF

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Publication number
WO2018224246A1
WO2018224246A1 PCT/EP2018/062424 EP2018062424W WO2018224246A1 WO 2018224246 A1 WO2018224246 A1 WO 2018224246A1 EP 2018062424 W EP2018062424 W EP 2018062424W WO 2018224246 A1 WO2018224246 A1 WO 2018224246A1
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mol
particles
group
poly
polymer
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PCT/EP2018/062424
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English (en)
Inventor
Stéphane JEOL
Kelly D. Branham
David Roller
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Solvay Specialty Polymers Usa, Llc
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Application filed by Solvay Specialty Polymers Usa, Llc filed Critical Solvay Specialty Polymers Usa, Llc
Priority to CN201880037883.XA priority Critical patent/CN110730709B/zh
Priority to US16/619,412 priority patent/US11685829B2/en
Priority to EP18722602.2A priority patent/EP3634705A1/fr
Priority to JP2019568079A priority patent/JP7229947B2/ja
Publication of WO2018224246A1 publication Critical patent/WO2018224246A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods
    • B29B7/007—Methods for continuous mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods
    • B29B7/005—Methods for mixing in batches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B29B2009/125—Micropellets, microgranules, microparticles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/16—Auxiliary treatment of granules
    • B29B2009/163—Coating, i.e. applying a layer of liquid or solid material on the granule
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/16—Auxiliary treatment of granules
    • B29B2009/166—Deforming granules to give a special form, e.g. spheroidizing, rounding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
    • B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
    • B29B7/18—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/183—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft having a casing closely surrounding the rotors, e.g. of Banbury type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B29B9/14—Making granules characterised by structure or composition fibre-reinforced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2267/00—Use of polyesters or derivatives thereof as reinforcement
    • B29K2267/04—Polyesters derived from hydroxycarboxylic acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials

Definitions

  • the present invention relates to a process for preparing particles of aromatic polymer, 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 also relates to polymeric particles obtained therefrom and to the use of these particles in SLS 3D printing, coatings and toughening of thermoset resins.
  • Additive manufacturing systems are used to print or otherwise build 3D
  • SLS selective laser sintering
  • CAD computer-aided design
  • SLS selective laser sintering
  • the laser selectively fuses the powdered material by scanning cross-sections generated from the digital blueprint of the object on the surface of a powder bed. After a cross-section is scanned, the powder bed is lowered by one layer thickness, a new layer of material is applied, and the bed is rescanned. Locally full coalescence of polymer particles in the top powder layer is necessary as well as an adhesion with previous sintered layers. This process is repeated until the object is completed.
  • Spherical particles with a particle size distribution between 20 and 80 pm are generally optimal for operation on SLS equipment.
  • Spherical polymer powders can be prepared by a process called prilling, according to which the polymer is dissolved in an organic solvent, followed by precipitation into a large volume of non-solvent.
  • prilling the use of solvents generates substantial environmental and disposal problems.
  • this process requires that the polymer be soluble into the organic solvent at a sufficient level for efficient processing.
  • Polyarylether polymers are however insoluble in most common solvents.
  • US 8,454,866 B2 discloses preparation of powders of aliphatic polyamides by forming a melt blend with an additive which is a block copolymer comprising poly(alkylene oxide) blocks. These blends are disintegrated in water, to produce a dispersion of polyamide particles that can then be isolated by filtration and drying.
  • the poly(alkylene oxide) polymers described in this patent while useful for preparing aliphatic polyamide powders, lack the thermal stability to be used with the high performance aromatic polymers.
  • One of the objects of the present invention is to provide a process for
  • Another object of the invention is to provide polymeric particles well-suited for the SLS 3D printing, coating compositions and toughening of thermoset resins. Brief description of the figure
  • FIG. 1 is a scanning electron microscopy (SEM) image of the PEEK-PEDEK particles of Example 1.
  • FIG. 2 is a scanning electron microscopy (SEM) image of the PPSU particles of Example 2.
  • a first object of the present invention is a process for preparing spherical polymeric particles without using organic solvents.
  • the merit of the Applicant has been to identify a class of materials, hereby called polyester
  • polymer (PE) having a thermal stability sufficient to be melt-blend with certain aromatic polymer, which makes possible the preparation of spherical polymeric particles and that are suitable for co-processing with high temperature aromatic polymers.
  • the PE polymer of the present invention withstands high temperatures, that-is-to-say notably does not degrade significantly at high temperatures, for example above 250°C.
  • the polyester polymer (PE) is such that it can be dissolved in water, possibly heated to a temperature up to 95°C, possibly supplemented with an acid or a base.
  • the PE polymer of the invention therefore not only presents a thermal stability sufficient to be melt-blended with polymeric polymers, but is also water-soluble.
  • an element or component is said to be included in and/or selected from a list of recited elements or components, it should be understood that in related embodiments explicitly contemplated here, the element or component can also be any one of the individual recited elements or components, or can also be selected from a group consisting of any two or more of the explicitly listed elements or components; any element or component recited in a list of elements or components may be omitted from such list; and
  • the present invention relates to a process for preparing
  • polymeric particles comprising the following steps :
  • P at least one polymer 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
  • polyester polymer comprising units from :
  • the diol component is a poly(alkylene glycol) having a formula (I) :
  • n is an integer from 2 to 4 and n varies from 2 to 10,
  • the step consisting in melt-blending the mixture (M) can take place with any suitable device, such as endless screw mixers or stirrer mixers, for example compounder, compatible with the temperature needed to melt the aromatic polymer.
  • the amount of energy applied to this step may be adjusted so as to control the size of the polymeric particles obtained therefrom.
  • the skilled person in the art can adjust the equipment (e.g. screw geometry) and the parameters of the equipment (e.g. rotation speed) to obtain particles of the desired size, for example with an average diameter varying between about 0.5 pm and about 500 pm.
  • the step of melt-blending takes place at a temperature chosen to be at least 10°C above the melting temperature (Tm) of the polymer, for example at least 15°C or 20°C above Tm,
  • the step of melt-blending takes place at a temperature chosen to be or at least 50°C above the glass transition temperature (Tg) of the amorphous polymer.
  • the step of melt-blending takes place at a temperature above 250°C, for example above 260°C, above 270°C or above 280°C.
  • the step consisting in processing the mixture into pellets or strands can be carried out by a process of extrusion through a die.
  • the step of cooling is conducted by any appropriate means, at a temperature lower than 80°C, for example lower than 50°C. Mention can notably be made of air cooling or quenching in a liquid, for example in water.
  • the stage of contacting the pellets or strands with water may consist in a step of immersing the same into water, possibly multiple bath of water. The water is optionally heated to a temperature up to 95°C, for example to a
  • the water can also be supplemented with an acid or a base, for example selected from the group consisting of potassium hydroxide, sodium hydroxide, lithium hydroxide, potassium carbonate, sodium carbonate, lithium carbonate, organic amines, hydrochloric acid and sulphuric acid. This step allows dissolution or dispersion of the polyester so as to recover the polymeric particles.
  • the steps of cooling the pellets or strands at a temperature below 80°C, for example lower than 50°C and contacting said pellets or strands with water, for example by immersion of the pellets or strands into water, can be carried out simultaneously in the same equipment.
  • the process of the invention may also comprise an additional step of drying of the particles, and/or an additional step of sieving the particles.
  • the step of drying can for example take place in a fluidized bed.
  • the polymer (P) is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
  • PAEK poly(aryl ether ketone)
  • PAES poly(aryl ether sulfone)
  • PEI polyetherimide
  • PPE poly(phenyl ether)
  • PAI aromatic polyamideimide
  • PP polyphenylene
  • PAEK poly(aryl ether ketone)
  • PAES poly(aryl ether sulfone)
  • polyetherimide PEI
  • PPE poly(phenyl ether)
  • PAI aromatic polyamideimide
  • PP polyphenylene
  • PAEK poly(aryl ether ketone)
  • PAES poly(aryl ether sulfone)
  • the recurring units (RPAEK) are selected from the group consisting of units of formulae (J-A) to (J-D) below :
  • the respective phenylene moieties may independently have 1 ,2-, 1 ,4- or 1 ,3-linkages to the other moieties different from R' in the recurring unit (RPAEK).
  • the phenylene moieties Preferably, the phenylene moieties have 1 ,3- or 1 ,4- linkages, more preferably they have a 1 ,4-linkage.
  • j' is preferably at each occurrence zero so that the phenylene moieties have no other substituents than those linking the main chain of the polymer.
  • the PAEK is poly(ether ether ketone) (PEEK).
  • PEEK poly(ether ether ketone)
  • RPAEK recurring units of formula J'-A
  • At least 60 mol. %, 70 mol. %, 80 mol. %, 90 mol. %, 95 mol. %, 99 mol. %, and most preferably all of recurring units (RPAEK) are recurring units (J'-A).
  • the PAEK is poly(ether ketone
  • PEKK poly(ether ketone ketone)
  • RPAEK mol. % of the recurring units
  • At least 60 mol. %, 70 mol. %, 80 mol. %, 90 mol. %, 95 mol. %, 99 mol. %, and most preferably all of recurring units (RPAEK) are a
  • the PAEK is poly(ether ketone) (PEK).
  • a "poly(ether ketone) (PEK)” denotes any polymer of which more than 50 mol. % of the recurring units (RPAEK) are recurring units of formula (J'-C), the mol. % being based on the total number of moles in the polymer :
  • At least 60 mol. %, 70 mol. %, 80 mol. %, 90 mol. %, 95 mol. %, 99 mol. %, and most preferably all of recurring units (RPAEK) are recurring units (J'-C).
  • the PAEK is a PEEK-PEDEK copolymer.
  • a "PEEK-PEDEK copolymer” denotes any polymer of which more than 50 mol. % of the recurring units (RPAEK) are both recurring units of
  • the PEEK-PEDEK copolymer may include relative molar proportions of recurring units J'-A and J'-D (PEEK/PEDEK) ranging from 95/5 to 60/40.
  • recurring units J'-A and J'-D represent all of the recurring units in the PAEK.
  • the PAEK is PEEK or PEEK-PEDEK.
  • KETASPIRE® PEEK is commercially available from Solvay Specialty
  • PAES Poly(aryl ether sulfone)
  • PAES poly(aryl ether sulfone)
  • each R equal to or different from each other, is selected from the group
  • a halogen consisting of a halogen, an alkyl, an alkenyl, an alkynyl, an aryl, an ether, a thioether, a carboxylic acid, an ester, an amide, an imide, an alkali or alkaline earth metal sulfonate, an alkyl sulfonate, an alkali or alkaline earth metal phosphonate, an alkyl phosphonate, an amine, and a quaternary ammonium;
  • each h equal to or different from each other, is an integer ranging from 0 to 4.
  • T is preferably a bond, a sulfone group or a group -C(Rj)(Rk)- in which Rj and
  • Rk are preferably methyl groups.
  • RPAES recurring units
  • the PAES is a polyphenylsulfone (PPSU).
  • PPSU polyphenylsulfone
  • a "polyphenylsulfone (PPSU)” denotes any polymer of which more than 50 mol. % of the recurring units are recurring units of formula (K'-A), the mol. % being based on the total number of moles in the polymer :
  • At least 60 mol. %, 70 mol. %, 80 mol. %, 90 mol. %, 95 mol. %, 99 mol. %, and most preferably all of the recurring units in the PPSU are recurring units of formula (K'-A).
  • PPSU can be prepared by known methods and is notably available as
  • the PAES is a polyethersulfone (PES).
  • PES polyethersulfone
  • a "polyethersulfone (PES)” denotes any polymer of which at least 50 mol. % of the recurring units are recurring units of formula (K'-B), the mol. % being based on the total number of moles in the polymer :
  • PES Preferably at least 60 mol. %, 70 mol. %, 80 mol. %, 90 mol. %, 95 mol. %, 99 mol. %, and most preferably all of the recurring units in the PES are recurring units of formula (K'-B).
  • PES can be prepared by known methods and is notably available as
  • the PAES is a polysulfone (PSU).
  • PSU polysulfone
  • a " polysulfone (PSU)" denotes any polymer of which at least 50 mol. % of the recurring units are recurring units of formula (K'-C), the mol. % being based on the total number of moles in the polymer : (K'-C).
  • At least 60 mol. %, 70 mol. %, 80 mol. %, 90 mol. %, 95 mol. %, 99 mol. %, and most preferably all of the recurring units in the PSU are recurring units of formula (K'-C).
  • PSU can be prepared by known methods and is available as UDEL ® PSU from Solvay Specialty Polymers USA, L.L.C.
  • the weight average molecular weight Mw of the PPSU may be from 30,000 to 80,000 g/mol, for example from 35,000 to 75,000 g/mol or from 40,000 to 70,000 g/mol.
  • the weight average molecular weight Mw of the PSU may be from 30,000 to 80,000 g/mol, for example from 35,000 to 75,000 g/mol or from 40,000 to 70,000 g/mol.
  • the weight average molecular weight (Mw) of PAES for example PPSU, PES and PSU, can be determined by gel permeation chromatography (GPC) using methylene chloride as a mobile phase (2x 5 ⁇ mixed D columns with guard column from Agilent Technologies ; flow rate : 1.5 mL/min; injection volume : 20 pL of a 0.2w/v% sample solution), with polystyrene standards.
  • GPC gel permeation chromatography
  • the weight average molecular weight (Mw) can be measured by gel permeation chromatography (GPC), using methylene chloride as the mobile phase.
  • GPC gel permeation chromatography
  • the following method was used : two 5 ⁇ mixed D columns with guard column from Agilent Technologies were used for separation. An ultraviolet detector of 254nm was used to obtain the chromatogram. A flow rate of 1.5ml/min and injection volume of 20 ⁇ _ of a 0.2w/v% solution in mobile phase was selected. Calibration was performed with 12 narrow molecular weight polystyrene standards (Peak molecular weight range : 371 ,000 to 580 g/mol). The weight average molecular weight (Mw) was reported.
  • PEI polyetherimide
  • [0060] comprises at least 50 mol.%, based on the total number of moles in the polymer, of recurring units (RPEI) comprising at least one aromatic ring, at least one imide group, as such and/or in its amic acid form, and at least one ether group.
  • RPEI recurring units
  • Recurring units (RPEI) may optionally further comprise at least one amide group which is not included in the amic acid form of an imide group.
  • the recurring units (RPEI) are selected from the group consisting of following formulas (I), (II), (III), (IV), (V) and mixtures thereof:
  • - Ar is a tetravalent aromatic moiety and is selected from the group consisting of a substituted or unsubstituted, saturated, unsaturated or aromatic monocyclic and polycyclic group having 5 to 50 carbon atoms;
  • Ar' is a trivalent aromatic moiety and is selected from the group consisting of a substituted, unsubstituted, saturated, unsaturated, aromatic monocyclic and aromatic polycyclic group having from 5 to 50 carbon atoms;
  • - R is selected from the group consisting of substituted and unsubstituted divalent organic radicals, for example selected from the group consisting of
  • - Y is selected from the group consisting of alkylenes of 1 to 6 carbon atoms, for example -C(CH3)2 and -C n H2n- (n being an integer from 1 to 6); perfluoroalkylenes of 1 to 6 carbon atoms, for example -C(CF3)2 and -C n F2n- (n being an integer from 1 to 6) ; cycloalkylenes of 4 to 8 carbon atoms ; alkylidenes of 1 to 6 carbon atoms ; cycloalkylidenes of 4 to 8 carbon atoms ; -O- ; -S- ; -C(O)- ; -S0 2 - ; -SO-, and
  • R" is selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, alkynyl, aryl, ether, thioether, carboxylic acid, ester, amide, imide, alkali earth metal sulfonate, alkaline earth metal sulfonate, alkyl sulfonate, alkali earth metal phosphonate, alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium and
  • - i, for each R" is independently zero or an integer ranging from 1 to 4, with the provisio that at least one of Ar, Ar' and R comprise at least one ether group and that the ether group is present in the polymer chain backbone.
  • Ar is selected from the group consisting of formulas:
  • X is a divalent moiety, having divalent bonds in the 3,3', 3,4', 4,3" or the 4,4' positions and is selected from the group consisting of alkylenes of 1 to 6 carbon atoms, for example -C(CH3)2 and -C n H2n- (n being an integer from 1 to 6); perfluoroalkylenes of 1 to 6 carbon atoms, for example -C(CF 3 )2 and -Cn F2n- (n being an integer from 1 to 6) ; cycloalkylenes of 4 to 8 carbon atoms ; alkylidenes of 1 to 6 carbon atoms ; cycloalkylidenes of 4 to 8 carbon atoms ; -O- ; -S- ; -C(O)- ; -S0 2 - ; -SO-;
  • X is a group of the formula -O-Ar"-O- wherein Ar" is a aromatic moiety selected from the group consisting of a substituted or unsubstituted, saturated, unsaturated or aromatic monocyclic and polycyclic group having 5 to 50 carbon atoms.
  • Ar' is selected from the group consisting of formulas:
  • X is a divalent moiety, having divalent bonds in the 3,3', 3,4', 4,3" or the 4,4' positions and is selected from the group consisting of alkylenes of 1 to 6 carbon atoms, for example -C(CH3)2 and -C n H2n- (n being an integer from 1 to 6); perfluoroalkylenes of 1 to 6 carbon atoms, for example -C(CF3)2 and -Cn F2n- (n being an integer from 1 to 6) ; cycloalkylenes of 4 to 8 carbon atoms ; alkylidenes of 1 to 6 carbon atoms ; cycloalkylidenes of 4 to 8 carbon atoms ; -O- ; -S- ; -C(O)- ; -S0 2 - ; -SO-;
  • X is a group of the formula -O-Ar"-O- wherein Ar" is a aromatic moiety selected from the group consisting of a substituted or unsubstituted, saturated, unsaturated or aromatic monocyclic and polycyclic group having 5 to 50 carbon atoms.
  • At least 50 mol. %, at least 60 mol. %, at least 70 mol. %, at least 80 mol. %, at least 90 mol. %, at least 95 mol. %, at least 99 mol. % or all of the recurring units in the PEI are recurring units (RPEI) of formulas (I), (I I), (II I), (IV), (V) and/or mixtures thereof, as defined above.
  • the PEI comprises at least 50 mol.%, based on the total number of moles in the polymer, of recurring units (RPEI) of formula (VI I):
  • R is selected from the group consisting of substituted and unsubstituted divalent organic radicals, for example selected from the group consisting of (a) aromatic hydrocarbon radicals having 6 to 20 carbon atoms and halogenated derivatives thereof ;
  • - Y is selected from the group consisting of alkylenes of 1 to 6 carbon atoms, for example -C(CH3)2 and -C n H2n- (n being an integer from 1 to 6); perfluoroalkylenes of 1 to 6 carbon atoms, for example -C(CF3)2 and -C n F2n- (n being an integer from 1 to 6) ; cycloalkylenes of 4 to 8 carbon atoms ; alkylidenes of 1 to 6 carbon atoms ; cycloalkylidenes of 4 to 8 carbon atoms ; -O- ; -S- ; -C(O)- ; -S0 2 - ; -SO-, and
  • R" is selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, alkynyl, aryl, ether, thioether, carboxylic acid, ester, amide, imide, alkali earth metal sulfonate, alkaline earth metal sulfonate, alkyl sulfonate, alkali earth metal phosphonate, alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium and
  • - i, for each R" is independently zero or an integer ranging from 1 to 4, with the provisio that at least one of Ar, Ar' and R comprise at least one ether group and that the ether group is present in the polymer chain backbone.
  • Ar is a aromatic moiety selected from the group consisting of a substituted or unsubstituted, saturated, unsaturated or aromatic monocyclic and polycyclic group having 5 to 50 carbon atoms, for example a substituted or unsubtitutated phenylene, a substitued or unsubstituted biphenyl group, a susbtituted or unsubstituted naphthalene group or a moiety comprising two substituted or unsubtitutated phenylene groups.
  • Ar is of the general formula (VI), as detailed above ; for example, Ar" is of formula (XIX): (XIX).
  • polyetherimides (PEI) of the present invention may be prepared by any of the methods well-known to those skilled in the art including the reaction of a diamino compound of the formula H2N-R-NH2 (XX), where R is as defined before, with any aromatic bis(ether anhydride)s of the formula (XXI):
  • the preparation can be carried out in solvents, e.g. o-dichlorobenzene, m-cresol/toluene, ⁇ , ⁇ -dimethylacetamide, at temperatures ranging from 20°C to 250°C.
  • solvents e.g. o-dichlorobenzene, m-cresol/toluene, ⁇ , ⁇ -dimethylacetamide
  • these polyetherimides can be prepared by melt polymerization of any dianhydrides of formula (XXI) with any diamino compound of formula (XX) while heating the mixture of the ingredients at elevated temperatures with concurrent intermixing.
  • aromatic bis(ether anhydride)s of formula (XXI) include, for example:
  • the organic diamines of formula (XX) are chosen from the group consisting of m-phenylenediamine, p-phenylenediamine, 2,2-bis(p-aminophenyl)propane, 4,4'-diaminodiphenyl-methane, 4,4'-diaminodiphenyl sulfide, 4,4'-diamino diphenyl sulfone, 4,4'-diaminodiphenyl ether, 1 ,5-diaminonaphthalene, 3,3'-dimethylbenzidine, 3,3'-dimethoxybenzidine, and mixtures thereof; preferably, the organic diamines of formula (XX) are chosen from the group consisting of m-phenylenediamine and p-phenylenediamine and mixture thereof.
  • the PEI comprises at least 50 mol.%, based on the total number of moles in the polymer, of recurring units (RPEI) of formulas (XXIII) or (XXIV), in imide forms, or their corresponding amic acid forms and mixtures thereof:
  • At least 50 mol. %, at least 60 mol. %, at least 70 mol. %, at least 80 mol. %, at least 90 mol. %, at least 95 mol. %, at least 99 mol. % or all of the recurring units in P1 and/or P2 are recurring units (RPEI) of formulas (XXIII) or (XXIV), in imide forms, or their corresponding amic acid forms and mixtures thereof.
  • Aromatic polyimides are commercially available from Sabic Innovative Plastics as ULTEM ® polyetherimides.
  • the PEI has a Tg ranging from 160 and 270°C, as measured by differential scanning calorimetry (DSC) according to ASTM D3418, for example ranging from 170 and 260°C, from 180 and 250°C.
  • DSC differential scanning calorimetry
  • PPE poly(phenyl ether)
  • A are independently selected from a C1 - C30 alkyl groups
  • PPE are recurring units (RPPE).
  • A represents CH3 and q is 2.
  • the phenylene moieties in the PPE have
  • the poly(phenyl ether) is poly(p-phenylene oxide) (PPO).
  • PPO poly(para-phenylene oxide)
  • a "poly(para-phenylene oxide) (PPO)" denotes any polymer of which at least 50 mol. % of the recurring units are recurring units (Rppo) of formula (W) :
  • a polyamideimide or aromatic polyamide-imide polymer comprises at least 50 mol. % of recurring units (RPAI) comprising at least one aromatic ring, at least one imide group, as such and/or in its amic acid form, and at least one amide group which is not included in the amic acid form of an imide group.
  • RPAI recurring units
  • recurring units are advantageously chosen among formula :
  • X being -0-, -C(O)- -CH2-, -C(CH3)2-, -C(CF3)2-, -(CF2)q-, with q being an integer from 1 to 5 ;
  • - R is a divalent aromatic group; typically R is selected from the group consisting of following structures :
  • Y being -0-, -S-, -SO2-, -CH2-, -C(0)-, -C(CH 3 )2-, -C(CF 3 ) 2 -, -(CF 2 ) q , q being an integer from 1 to 5.
  • the aromatic polyamide-imide comprises more than 50 % of recurring units (RPAI) comprising an imide group in which the imide group is present as such, like in recurring units (RpAi-a), and/or in its amic acid form, like in recurring units (RpAi-b).
  • RPAI recurring units
  • the imide group is present as such, like in recurring units (RpAi-a), and/or in its amic acid form, like in recurring units (RpAi-b).
  • Recurring units are preferably chosen from recurring units (I), (m) and (n), in their amide-imide (a) or amide-amic acid (b) forms :
  • the polymer (PAI) comprises more than 90 mol. % of
  • RPAI recurring units
  • RPAI recurring units
  • PAI can be prepared by known methods and is available as TORLON ® PAI, for example Torlon ® 4000T, from Solvay Specialty Polymers USA, L.L.C.
  • a polyphenylene polymer refers to any polymer comprising at least 50 mol. % repeat units (Rpp) of formula (F) :
  • R 1 , R 2 , R 3 , and R 4 are each independently selected from the group consisting of a hydrogen, an alkyl, an aryl, an alkoxy, an aryloxy, an alkylketone, an arylketone, a fluoroalkyl, a fluoroaryl, a bromoalkyl, a bromoaryl, a chloroalkyl, a chloroaryl, an alkylsulfone, an arylsulfone, an alkylamide, an arylamide, an alkylester, an arylester, a fluorine, a chlorine, and a bromine.
  • a polyphenylene polymer comprises at least about 60 mol. %, at least about 70 mol. %, at least about 80 mol. %, at least about 90 mol. %, at least about 95 mol. %, at least about 99 mol. % or at least about 99.9 mol. % repeat units (Rp).
  • R 1 , R 2 , R 3 , and R 4 are independently of formula (F') :
  • - Ar is selected from the following group of :
  • each Rj, Rk and Ri is independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, alkynyl, aryl, ether, thioether, carboxylic acid, ester, amide, imide, alkali or alkaline earth metal sulfonate, alkyl sulfonate, alkali or alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium and with j and I, equal or different from each other are independently 0, 1 , 2, 3, 4, or 5 and, k, equal or different from j or I, is independently 0, 1 , 2, 3 or 4;
  • T is selected from the group consisting of -CH2-; -0-; -SO2-; -S-;
  • each R a and Rb independently of one another, is a hydrogen or a C1 -C12 alkyl, C1 -C12-alkoxy, or C6-C18-aryl group; -(CH 2 ) n - and -(CF 2 ) n - with n being an integer from 1 to 6; an aliphatic divalent group, linear or branched, of up to 6 carbon atoms; and combinations thereof.
  • R 1 , R 2 , R 3 , and R 4 can be represented by formula (F") :
  • Polyphenylene copolymers are commercially available from Solvay Specialty
  • PAEK poly(aryl ether ketone)
  • PAES poly(aryl ether sulfone)
  • PEI polyetherimide
  • PPE poly(phenyl ether)
  • PAI aromatic polyamideimide
  • PP polyphenylene
  • the mixture (M) of the present invention comprises a polymer blend of at least one poly(aryl ether ketone) (PAEK) and at least one poly(aryl ether sulfone) (PAES).
  • the polymer blend can be prepared extemporary, for example using melt-mixing processes. Melt-mixing processes are typically carried out by heating the polymer components above the melting temperature of the thermoplastic polymers thereby forming a melt of the thermoplastic polymers. In some embodiments, the processing temperature ranges from about 280-450°C, preferably from about 290-440°C, from about 300-430°C or from about 310-420°C.
  • Suitable melt-mixing apparatus are, for example, kneaders, Banbury mixers, single-screw extruders, and twin-screw extruders.
  • an extruder fitted with means for dosing all the desired components to the extruder, either to the extruder's throat or to the melt.
  • the polymer to be blended e.g. PAES, PAEK and optionally additives, are fed to the melt-mixing apparatus and melt-mixed in that apparatus.
  • the components may be fed simultaneously as a powder mixture or granule mixer, also known as dry-blend, or may be fed separately.
  • the order of combining the components during melt-mixing is not particularly limited.
  • the component can be mixed in a single batch, such that the desired amounts of each component are added together and subsequently mixed.
  • a first sub-set of components can be initially mixed together and one or more of the remaining components can be added to the mixture for further mixing.
  • the total desired amount of each component does not have to be mixed as a single quantity.
  • a partial quantity can be initially added and mixed and, subsequently, some or all of the remainder can be added and mixed.
  • a "polyester polymer (PE)” denotes any polymer comprising units from :
  • the diol component is a poly(alkylene glycol) of formula (I) :
  • n is an integer from 2 to 4 and n varies from 2 to 10.
  • the dicarboxylic acid component comprises at least one aromatic dicarboxylic acid, for example selected from the group consisting of isophthalic acid(IPA), terephthalic acid (TPA), naphthalendicarboxylic acids (e.g.
  • naphthalene-2,6-dicarboxylic 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 mixture thereof.
  • the diol component is such that at least
  • the diol component is a poly(ethylene glycol) of formula (II) :
  • n varies from 2 to 10.
  • the diol component is such that at least
  • the diol component (based on the total number of moles of the diol component) is a poly(alkylene glycol) of formula (I) :
  • n is an integer from 2 to 4 and n varies from 2 to 10, preferably a poly(ethylene glycol) of formula (II) :
  • n varies from 2 to 10.
  • the diol component is such that at least
  • diol component (based on the total number of moles of the diol component), is a diethylene glycol of formula HO-CH 2 -CH 2 -0-CH 2 -CH 2 -OH.
  • the diol component may comprise at least one diol selected from the group consisting of ethylene glycol, 1.4- cyclohexanedimethanol, propane-1 ,2-diol, 2,2-dimethyl-1 ,3-propanediol,
  • the diol component of the polyester polymer (PE) consists essentially in :
  • n varies from 2 to 10.
  • the diol component of the polyester is the diol component of the polyester
  • PE polymer
  • preferred polyester are polyesters which further comprise recurring units from a difunctional monomer containing at least one SO3M group attached to an aromatic nucleus, wherein the functional groups are carboxy and wherein M is H or a metal ion selected from the group consisting of sodium, potassium, calcium, lithium, magnesium, silver, aluminium, zinc, nickel, copper, palladium, iron, and cesium, preferably from the group consisting of sodium, lithium and potassium.
  • Such preferred polyester are sometimes called sulfopolyester (SPE).
  • the difunctional sulfomonomer can for example be present in the SPE in a molar ratio comprised between 1 to 40 mol. %, based on the total number of moles (i.e. total number of moles of diacid and diol components if the SPE is composed exclusively of diacid and diol
  • components in the SPE for example between 5 and 35 mol. %, or between 8 to 30 mol. %.
  • the polyester (PE) comprises units from :
  • the diol component is a poly(alkylene glycol) of formula (I) :
  • n is an integer from 2 to 4 and n varies from 2 to 10,
  • At least one difunctional monomer containing at least one SO3M group attached to an aromatic nucleus wherein the functional groups are carboxy and wherein M is H or a metal ion selected from the group consisting of sodium, lithium and potassium.
  • the polyester (PE) comprises units from :
  • n is an integer from 2 to 4 and n varies from 2 to 10,
  • polyester (PE) comprises or consists essentially in units from :
  • aromatic dicarboxylic acid selected from the group consisting of isophthlaic acid(IPA), terephthalic acid (TPA), naphthalendicarboxylic acids (e.g. naphthalene-2,6-dicarboxylic acid), 4,4'-bibenzoic acid, 2,5-pyridinedicarboxylic acid, 2,4-pyridinedicarboxylic acid,
  • IPA isophthlaic acid
  • TPA terephthalic acid
  • naphthalendicarboxylic acids e.g. naphthalene-2,6-dicarboxylic acid
  • 4,4'-bibenzoic acid 2,5-pyridinedicarboxylic acid, 2,4-pyridinedicarboxylic acid
  • aromatic dicarboxylic acid e.g. isophthalic acid, terepthalic acid,
  • 2.6- naphthalene 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.
  • the PE comprises at least 2 mol. %, at least 4 mol. %, at least 10 mol. %, at least 20 mol. %, at least 30 mol. %, at least 40 mol. % or at least 50 mol. % of diethylene glycol, based on the total number of units moles in the PE, e.g. total number of diacid and diol components if the PE is composed exclusively of diacid and diol units.
  • polyesters are Eastman AQ Polymers, especially those having a glass transition temperature ranging from about 25°C to about 50°C.
  • Eastman AQ 38S is a polyester identified as an diethylene glycol/cyclohexanedimethanol/isophthalates/sulfoisophthalates polyester.
  • the polyester (PE) of the present invention may be in the form of a salt of sulfonic acid or/and carboxylic acid, more precisely a sulfonate -SO3 " or a carboxylate -COO-.
  • the PE may therefore comprise one or several groups (SO3- M + ) and/or (COO- M + ), in which M is a metal.
  • M is selected from the group consisting of sodium, potassium or lithium, calcium, magnesium, silver, aluminium, zinc, nickel, copper, palladium, iron and cesium.
  • polyesters (PE) of the present invention can for example be derived
  • the number average molecular weight Mn of the polyesters (PE) may be between 1 ,000 g/ mol and 40,000 g/mol, more preferentially between
  • the PE polymer is present in the mixture (M) in an amount of at least 30 wt. %, at least 35 wt. %, at least 40 wt. %, at least 45 wt. %, at least 50 wt. %, at least 55 wt. %, at least 60 wt. %, at least 65 wt. % formulate at least 70 wt. %, at least 75 wt. % or at least 80 wt. %, based on the total weight of the mixture (M).
  • the process of the invention makes possible the preparation of polymeric particles of regular shape and size, for examples PEEK particles, PPSU particles, PSU particles or PES particles.
  • particle refers to an individualized entity.
  • the size of the so-obtained particles generally depends from different factors, such as the amount of energy used in the melt-blending step, the nature of the aromatic polymer, for example its viscosity of melt flow rate, the temperature used in the melt-blending step and the ratio polymenpolyester used.
  • Particles may have an average diameter of less than about 400 pm, in some embodiments from about 0.5 pm to about 350 pm, alternatively from about 1 pm to about 300 pm, or from about 5 pm to about 250 pm.
  • the average diameter can be evaluated by scanning electron microscopy (SEM).
  • the particles of the present invention can be characterized by their particle size distribution D50 (in short “D50”), which is also known as the median diameter or the medium value of the particle size distribution, according to which 50% of the particles in the sample are larger and 50% of the particles in the sample are smaller.
  • D50 particle size distribution
  • Particle Size Analysis can for example take place in a Microtrac S3500 with Microtrac Sample Delivery Controller (SDC).
  • the PEEK particles have a D50 comprised between 5 pm and 100 pm, for example less than 80 pm and greater than 10 pm or less than 60 pm and greater than 15 pm.
  • the PPSU particles have a D50 comprised between 5 pm and 500 pm, for example between 8 and 400 pm, greater than 10 pm or less than 300 pm.
  • the PSU particles have a D50 comprised between 5 pm and 100 pm, for example less than 80 pm and greater than 10 pm or less than 60 pm and greater than 15 pm.
  • the PES particles have a D50 comprised between 5 pm and 200 pm, for example less than 150 pm and greater than 10 pm or less than 120 pm and greater than 30 pm.
  • the particles of the present invention can be characterized by their bulk
  • the bulk density of a powder is the ratio of the mass of an untapped powder sample and its volume including the contribution of the interparticulate void volume.
  • the bulk density can be expressed in grams per millilitre (g/ml) or in grams per cubic
  • Density measurements can for example take place in a Quantachrome AutotapTM Tapped Density analyser.
  • the polymer particles have:
  • the present invention also relates to particles of aromatic polymer produced by a process comprising : - melt-blending the aromatic polymer (P), for example PAEK or PAES, with at least one polyester polymer (PE) comprising units from :
  • P aromatic polymer
  • PE polyester polymer
  • the diol component is a poly(alkylene glycol) having a formula (I) :
  • n is an integer from 2 to 4 and n varies from 2 to 10, and
  • the particles of the present invention may be substantially spherical, for example with a circularity and/or a roundness of at least 0.75, for example at least 0.8 or at least 0.85.
  • the roundness is defined as a measure of surface smoothness of the
  • the circularity is defined as the measure of spherical shape of the particles and is measured according to the following equation :
  • Circularity 4 ⁇ x
  • a powder flow enhancer such as a mineral, for example silica
  • the polymer particles of the present invention comprise or consist essentially in:
  • the polymer particles of the present invention comprise or consist essentially in:
  • At least one additive selected from the group consisting of fillers, colorants, lubricants, plasticizers, flame retardants, nucleating agents and stabilizers, based on the total weight of the part material.
  • the particles of the invention can comprise various additives, such as
  • lubricants heat stabilizers, light stabilizers, antioxidants, pigments, processing aids, dyes or fillers (e.g. biocompatible fillers such as
  • hydroxyapatite Mention may in particular be made, by way of examples, of titanium dioxide, zinc oxide, cerium oxide, silica or zinc sulphide, these being used as lubricants and/or abrasive.
  • Fillers e.g. reinforcing fillers or mineral fillers
  • glass fibers carbon fibers, talc, wollastonite, calcium carbonate, mica... etc.
  • the polymer composition may further comprise flame retardants such as halogen and halogen free flame retardants.
  • additives when present, are located inside the polymer particles, and are homogeneously located in the polymer matter.
  • the particles of the present invention can be used in various applications, notably SLS 3D printing, coatings and toughening of thermoset resins.
  • the present invention also therefore relates to the use of the polymeric
  • PEEK-PEDEK a copolymer PEEK-PEDEK 70/30 mol/mol prepared
  • reaction mixture (containing less than 10 ppm 02). The reaction mixture was then placed under a constant nitrogen purge (60 mL/min).
  • the reaction mixture was heated slowly to 150°C.
  • 150°C a mixture of 26.876 g of Na 2 CO 3 and 0.1524 g of K 2 CO 3 was added via a powder dispenser to the reaction mixture over 30 minutes.
  • the reaction mixture was heated to 320°C at 1 °C/minute.
  • 6.415 g of 4,4'-difluorobenzophenone were added to the reaction mixture while keeping a nitrogen purge on the reactor.
  • 0.418 g of lithium chloride were added to the reaction mixture.
  • another 2.138 g of 4,4'-difluorobenzophenone were added to the reactor and the reaction mixture was kept at temperature for 15 minutes.
  • the reactor content was then poured from the reactor into a SS pan and cooled.
  • the solid was broken up and ground in an attrition mill through a 2 mm screen.
  • Diphenyl sulfone and salts were extracted from the mixture with acetone and water at pH between 1 and 12.
  • the powder was then removed from the reactor and dried at 120°C under vacuum for 12 hours yielding 73 g of a white powder.
  • melt viscosity measured by capillary rheolology at 400°C, 1000 S "1 using a tungsten carbide die of 0.5 x 3.175 mm was 0.19 kN- s /m 2 .
  • PE Sulfopolyester Eastman AQTM 48 commercially available from Eastman.
  • This PE is composed of diethylene glycol, cyclohexanedimethanol (CHDM), isophthalates and sulfoisophthalates units. According to 1 H NMR analysis, the molar concentration of diethylene glycol of 70 mol. %, based on the total moles of diols (CHMD + diethylene glycol).
  • composition was melt-blended during 3 minutes in a DSM Xplore ® Micro-compounder at a specific temperature (see Table 1 ) and at
  • FIG. 1 is an SEM scan of the PEEK-PEDEK 70/30 mol/mol copolymer particles of Example 1 .
  • FIG. 2 is an SEM scan of the PEEK-PEDEK 70/30 mol/mol copolymer particles of Example 2.
  • Particle size analysis was conducted using a Microtrac S3500 with Microtrac Sample Delivery Controller (SDC).
  • the particles of example 2, shown on Figure 2 have a circularity of 0.915 ⁇
  • PE Sulfopolyester Eastman AQTM 48 commercially available from Eastman [00161] Material Processing
  • composition was melt-blended during 3 minutes DSM Xplore ® Micro- compounder at a specific temperature (see Table 3). Each blend was then processed into strands and then quenched in air until solid. Samples were immersed into water heated to 95°C, for 2 hours. Water was then removed. Samples were immersed again into water heated at 90°C, for 2 hours.
  • compositions gave a polymer powder according to the invention.
  • the powders were then isolated by filtration and vacuum dried.
  • FIG. 2 is an SEM scan of the PPSU particles of Example 2.
  • PEKK T/l ratio of 60/40
  • reaction mixture was heated slowly to 280°C.
  • 280°C 13.743 g of Na 2 C0 3 and 0.086 g of K2CO 3 were added via a powder dispenser to the reaction mixture over 60 minutes.
  • the reaction mixture was heated to 320°C at 1 °C/minute.
  • 1.207 g of 1 ,4-bis(4'-fluorobenzoyl)benzene were added to the reaction mixture while keeping a nitrogen purge on the reactor.
  • PE Sulfopolyester Eastman AQTM 38 S commercially available from
  • This PE is composed of diethylene glycol, cyclohexanedimethanol (CHDM), isophthalates and sulfoisophthalates units.
  • CHDM cyclohexanedimethanol
  • isophthalates cyclohexanedimethanol
  • sulfoisophthalates units.
  • composition was melt-blended in a ZSK-26 Twin Screw Extruder (Coperion) at specific conditions indicated in Table 5.
  • Each polymer melt was dropped from the extruder die in a bucket of hot water (60°C) with occasional mixing. Powders were isolated by vacuum filtration employing a Buchner funnel. Powders were then washed with 2-3 L of deionized water in the Buchner funnel. Solids were thin transferred into a beaker and washed in 0.5-1 L of 20% phosphoric acid at 80°C for 1 -2 hours. Powders were dried at 100°C and reduced pressure. Each polymer was mixed with colloidal silica (Aerosil ® 200, Spectrum Chemical) to give a 1 wt.% mixture.
  • PEKK PE Screw Melt Temp Through(wt. %) (wt. %) speed (rpm) (°C) put (Ib/hr)
  • Particle size analysis was conducted using a Microtrac S3500 with
  • SDC Microtrac Sample Delivery Controller
  • reaction mixture was heated slowly to 150 °C.
  • 150°C a mixture of 28.43 g of dry Na 2 C0 3 and 0.18 g of dry K2C0 3 was added via a powder dispenser to the reaction mixture over 30 minutes.
  • the reaction mixture was heated to 320°C at rc/minute.
  • the reaction was stopped by the introduction of 6.82 g of 4,4'-difluorobenzophenone to the reaction mixture while keeping a nitrogen purge on the reactor. After 5 minutes, 0.44 g of lithium chloride were added to the reaction mixture. 10 minutes later, another 2.27 g of 4,4'-difluorobenzophenone were added to the reactor and the reaction mixture was kept at temperature for 15 minutes. The reactor content was then cooled. The solid was broken up and ground.
  • the polymer was recovered by filtration of the salts, washing and drying.
  • PE Sulfopolyester Eastman AQTM 38 S commercially available from
  • This PE is composed of diethylene glycol, cyclohexanedimethanol
  • CHDM isophthalates and sulfoisophthalates units.
  • CHMD diethylene glycol
  • Blends were made according to the processing described in example 3.
  • PE Sulfopolyester Eastman AQTM 48 Ultra commercially available from
  • This PE is composed of diethylene glycol, cyclohexanedimethanol (CHDM), isophthalates and sulfoisophthalates units.
  • CHDM cyclohexanedimethanol
  • isophthalates cyclohexanedimethanol
  • sulfoisophthalates units.
  • PPSU (Mw: 46,500 g/mol), prepared according to the below process: [00184] The synthesis of the PPSU was achieved by the reaction in a 1 L flask of
  • Molecular weight of the PPSU The molecular weight was measured by gel permeation chromatography (GPC), using methylene chloride as a mobile phase. Two 5 ⁇ mixed D columns with guard column from Agilent
  • Blends were made according to the processing described in example 3.
  • PE Sulfopolyester Eastman AQTM 48 Ultra commercially available from
  • This PE is composed of diethylene glycol, cyclohexanedimethanol (CHDM), isophthalates and sulfoisophthalates units.
  • CHDM cyclohexanedimethanol
  • isophthalates cyclohexanedimethanol
  • sulfoisophthalates units.
  • the blend of PEEK and PPSU was obtained by melt compounding using a 26 mm diameter Coperion® ZSK-26 co-rotating partially intermeshing twin screw extruder having an L/D ratio of 48:1 .
  • the barrel sections 2 through 12 and the die were heated to set point temperatures as follows:
  • the blend was fed at barrel section 1 using a gravimetric feeder at throughput rates in the range 30-35 Ib/hr.
  • the extruder was operated at screw speeds of around 200 RPM. Vacuum was applied at barrel zone 10 with a vacuum level of about 27 inches of mercury.
  • a single-hole die was used for all the compounds to give a filament approximately 2.6 to 2.7 mm in diameter and the polymer filament exiting the die was cooled in water and fed to the pelletizer to generate pellets approximately 2.7 mm in length. Pellets were dried at 140°C for 16 h under vacuum.
  • Blends were made according to the processing described in example 3.

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  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne un procédé pour la préparation de particules polymères, basé sur l'utilisation d'un polymère de type polyester (PE) comprenant des motifs issus d'un composant acide dicarboxylique et d'un composant diol, au moins 2 % en moles du composant diol étant un poly(alkylèneglycol). Le procédé comprend le mélange à l'état fondu du polymère aromatique (P) avec le PE, le refroidissement du mélange et la récupération des particules par dissolution du PE dans de l'eau. La présente invention concerne également des particules polymères obtenues à partir de ce procédé et l'utilisation de ces particules en impression 3D par SLS, dans des revêtements et en renforcement de résines thermodurcissables.
PCT/EP2018/062424 2017-06-07 2018-05-14 Procédé pour la préparation de particules de polymères aromatiques, particules pouvant être obtenues par ledit procédé et leurs utilisations WO2018224246A1 (fr)

Priority Applications (4)

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CN201880037883.XA CN110730709B (zh) 2017-06-07 2018-05-14 芳香族聚合物颗粒及其制备方法和用途
US16/619,412 US11685829B2 (en) 2017-06-07 2018-05-14 Process for preparing particles of aromatic polymers, particles obtainable by said process and their uses
EP18722602.2A EP3634705A1 (fr) 2017-06-07 2018-05-14 Procédé pour la préparation de particules de polymères aromatiques, particules pouvant être obtenues par ledit procédé et leurs utilisations
JP2019568079A JP7229947B2 (ja) 2017-06-07 2018-05-14 芳香族ポリマー粒子の調製方法、該方法により得られる粒子及びそれらの使用

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US201762516404P 2017-06-07 2017-06-07
US62/516,404 2017-06-07
EP17184269 2017-08-01
EP17184269.3 2017-08-01

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CN114269459A (zh) * 2019-07-30 2022-04-01 索尔维特殊聚合物美国有限责任公司 包含聚芳醚砜和聚芳醚酮共混物的膜及其制造方法
WO2022223261A1 (fr) * 2021-04-19 2022-10-27 Solvay Specialty Polymers Usa, Llc Compositions et procédés pour la production de particules polymères submicroniques
US11654615B2 (en) 2017-12-27 2023-05-23 Solvay Specialty Polymers Usa, Llc Method for manufacturing a three-dimensional object

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* Cited by examiner, † Cited by third party
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US11654615B2 (en) 2017-12-27 2023-05-23 Solvay Specialty Polymers Usa, Llc Method for manufacturing a three-dimensional object
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WO2022223261A1 (fr) * 2021-04-19 2022-10-27 Solvay Specialty Polymers Usa, Llc Compositions et procédés pour la production de particules polymères submicroniques

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