Better, cleaner chemistry
ASC 2016 Fall ConferencePSA Technology
High Melting Point Dispersions
M. Giacomelli Penon18th of October 2016
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Better, cleaner chemistry
Outline
• Introduction dispersions
• Tackifier dispersions for PSA
• High softening point tackifiers
• Test results
• Conclusions
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Better, cleaner chemistry
Outline
• Introduction dispersions– What is a dispersion
– Types of dispersing
– Surfactants
– Stability
• Tackifier dispersions for PSA
• High softening point tackifiers
• Test results
• Conclusions
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• What is a dispersion• A dispersion is a system in which particles are dispersed in a
continuous phase of a different composition (or state)
• Types of dispersions
Dispersed phase Continuous phase Colloid
Gas Gas -
Liquid Gas Aerosol
Solid Gas Solid aerosol
Gas Liquid Foam
Liquid Liquid Emulsion
Solid Liquid Sol
Gas Solid Solid foam
Liquid Solid Gel
Solid Solid Solid sol
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• How to disperse• Types of dispersing
• Catastrophic
Shake well
• Inversion
Temperature
• Inversion
Temperature
Dosing speed
Energy
“Art”
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• How to disperse
• What happens during dispersing• Shear forces on the particles, deform & break
• Too fast is not good
• Too slow is also not good
energy
Pa
rtic
le s
ize
optimal
y
τ
u
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du/dy
τ=μ(du/dy)
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• How to disperse
• Ingredients
• Dispersant Tackifier
• Continuous medium Water
• Surfactant Anionic / nonionic / polymeric
• Tools
• Batch Stirrer
• Continuous Rotor-Stator
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• How to disperse
• Finally, is it a stable dispersion?
Creaming Sedimentation Coalescence
Flocculate Oswald ripening Customer
vdWaals attraction
Attract>>repuls
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• How to disperse
• Main causes stability issues
• Particle size too large / not uniform
• Amount of surfactant too little / too much
• Type of surfactant anionic/cationic/polymeric
• Customer fine-tuning 9
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Outline
• Introduction dispersions
• Tackifier dispersions for PSA– Current products for the PSA market
– What & how to disperse this
• High softening point tackifiers
• Test results
• Conclusions
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• Current portfolio
• Oil based• Hydrocarbons C5
• Hydrocarbons C9
• Hydrocarbons C5/C9
• Natural resource based• Rosin acid
• Rosin esters
• Dimerized rosin
• Polyterpenes
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• Current portfolio rosin based
Rosin acid Rosin esters Dimerized
CO2H
CO2H
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• Typical parametersSoftening point ~70-90 degrees C (158-194F)
Acid value ~170 – 10 (mgKOH/g)
• To dispersesolid at RT > viscous at 80C (176F) > liquid at 100C (212F)
Batch & continuously dispersed
Surfactant for these conditions
• Main market
Bulk volume label market
• Why?
To modify properties mainly tack & adhesion13
Better, cleaner chemistry
Outline
• Introduction dispersions
• Tackifier dispersions for PSA
• High softening point tackifiers– Why higher softening point resins?
– Challenges
– New products specification
• Test results
• Conclusions
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• Why high softening point resins?
• Market Interest for WB tackifiers in TT
• Technical tape marketRequirements:
» Cohesion
» Peel Tack
» High T resistance
• ChallengesSolid at RT, still a solid at 80C (176F), at 100C (212F) it is viscous
Batch & continuous dispersing
Solvent free
Surfactants 15
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• New rosin ester products available
Softening status type
80C (176F) commercial rosin based
90C (194F) commercial rosin based
100C(R) (212F) commercial rosin based
“known”
“new”100C(H) development HC based
110C(R) (230F) commercial rosin based
110C(HR) development HC /rosin based
120C (248F) development rosin based
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Outline
• Introduction dispersions
• Tackifier dispersions for PSA
• High softening point tackifiers
• Test results– PA180
– LT
– SAFT
• Conclusions
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• Test Phase• Collect wide range of technical tape adhesives
• Tackifier loading 20% - 100 g/m2
• Two tracks
Rosin Resin Hydrocarbon/hybrid
Pure PSA Pure PSA
- 80C (176F) R based
- 100C (212F) R based
100 R based 100C HC based (DEV)
110 R based 110 (230F) Hybrid based (DEV)
• Testing PA180 / LT / SAFT
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• Results Track 1 rosin resin
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90C = 194F100C = 212F110C = 230F
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• Prelim Results Track 2 hybrid/HC
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80C = 176F100C = 212F110C = 230F
Better, cleaner chemistry
Outline
• Introduction dispersions
• Tackifier dispersions for PSA
• High softening point tackifiers
• Test results
• Conclusions
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• Conclusions
• High softening point tackifiers
• High softening point tackifiers can be successfully dispersed
• Rosin - Hybrid & Hydrocarbon based tackifiers
• All solvent free
• Show good results in technical tapes
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Thank you for your attention
Questions?
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