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

6

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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