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The use of Hansen Solubility
Parameters (HSP) in the
development of inkjet inks
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Chemstream: The Chemical R&D CompanyProfile
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➢ Staff profile: 9 PhD’s
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➢ Located near Antwerp – Belgium
➢ Lab-facilities (500 m2)
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Chemstream: The Chemical R&D CompanyMission
design to prototyping and implementation
Organic Synthesis Technology Methodology Analytical and physicalchemical tools
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Ink design (R&D) Technology
Ink development
TOOLS
MP
U (
IJC
2015)
DO
E (
IJC
2016)
HS
P (
IJC
2017)
Modular Printing
Unit
Frank De Voeght
IJC 2015
D.O.E.
Veerle Goossens
IJC 2016
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the solubilitybehaviour of a substance• dD – the Dispersion
• dP – the Polar
• dH – the Hydrogen bonding
3D Hansen solubility space
Hansen Solubility Parameters (HSP)
40 different solvents in the
3D Hansen solubility space
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• The closer the position
the more ‘alike’
40 different solvents in the
3D Hansen solubility space
Hansen Solubility Parameters (HSP)
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• The closer the position
the more ‘alike’
•
solubility sphere
• The radius a measure of
its ‘solubility’
The Hansen solubility sphere of 1
molecule in the 3D Hansen solubility
space
Hansen Solubility Parameters (HSP)
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• Dissolving
• Miscibility
• Sedimentation
• Diffusion/permeability
• Swelling
• Attack
•
Hansen Solubility Parameters (HSP)
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Sedimentation of pigmentsin ink carrier
Nano-dispersionstability
Swelling/attack of polymersin ink carrier
Material compatibility
Hansen Solubility Parameters (HSP)
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Hansen Solubility Parameters (HSP)
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Nano-dispersion stability
20 mm
Agglomerated pigment
particles Milling in ink carrierStabilized pigment
nano-dispersion
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FOR EXAMPLE:
UV-curable pigmented nano-dispersions
Nano-dispersion stability
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•
•
FOR EXAMPLE:
Mixed crystal Magenta ‘PV19/PR202’
• Quality A
• Quality B
• Quality C Studied with Hansen solubility parameters (HSP)
Nano-dispersion stability
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Hansen solubility Parameters (HSP) study:
Mixed crystal Magenta ‘PV19/PR202’
Quality A
H-bonding
Quality B Quality C
Nano-dispersion stability
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Hansen solubility Parameters (HSP) study:
Mixed crystal Magenta ‘PV19/PR202’
Solubility sphere(s) of each pigment quality compared with the position of UV-curable
monomers (= classic UV curable ink carrier) in the 3D solubility space
Quality A Quality B Quality C
Nano-dispersion stability
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Hansen solubility Parameters (HSP) study:
Mixed crystal Magenta PV19/PR202
In Practice:
Dispersions (10% pigment) CSD01052 CSD01147 CSD001153pigment Quality A Quality B Quality C
physical appearance liquid liquid thick pasteviscosity after
filtration mPa.s @ 25°C 84 105 unable to filterviscosity after 7d 60°C mPa.s @ 25°C 86 130 n.d.
viscosity in ink simulation
(5% pigment)
fresh (mPa.s @ 25°C) 15,7 26,4 n.d.after stability test 17,6 62 n.d.
% rise in visco 12 135 n.d.
Nano-dispersion stability
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Sedimentation of pigmentsin ink carrier
Nano-dispersionstability
Swelling/attack of polymersin ink carrier
Material compatibility
Hansen Solubility Parameters (HSP)
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Hansen Solubility Parameters (HSP)
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Material compatibility
Can all materials (printhead, nozzle plate, tubings, etc.) withstand the jetting fluids ?
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–
–
HSP study can help upfront
Printhead test
SET
KM1024
weight (g)after 7d 60°C
in ink carrier
difference in
weight (%)
HA-1 Adhesive 0,0978 0,10846 10,9
HA-2 Adhesive 0,10999 0,1117 1,6
HA-3 Adhesive 0,09554 0,10565 10,6
HP-1 Nozzle Plate 0,01918 0,01905 -0,7
HP-2 Head Cover 0,31924 0,32026 0,3
HP-3 Manifold 0,30526 0,30545 0,1
KM1024 compatibility set
Material compatibility
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Hansen solubility Parameters (HSP) study:
Selection of polymers
Polymer dD dP dH
Polypropylene (PP) 18 0 1
Polyethylene (PE) 16,9 0,8 2,8
Polyurethane (PU) 18,1 9,3 4,5
Polyethylene oxide (PEO, PEG) 17 10 5
Polymethylmethacrylate (PMMA) 18,6 10,5 5,1
Polyvinylchloride (PVC) 18,8 9,2 6,3
Polyoxymethylene (POM) 17,2 9,2 9,8
Material compatibility
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Hansen solubility Parameters (HSP) study:
Selection of 29 commonly used UV-curable
monomers
29 different UV-curable monomers
in the 3D Hansen solubility space
Material compatibility
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Hansen solubility Parameters (HSP) study:
PP and POM in UV curable monomers
Polymer dD dP dH
Polypropylene (PP) 18 0 1
Polyoxymethylene (POM) 17,2 9,2 9,8
PP
POM
Material compatibility
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Hansen solubility Parameters (HSP) study:
Similar studies can be done for
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•
•
•
Material compatibility
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ConclusionModular Printing Unit
Valuable
TOOLS
MP
U
DO
E
HS
P
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