ARKEMA COATEX Presentation COADIS 123 K Hidrophobic dispersant.pdf

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    Possibilities offered by a unique hydrophobic dispersant

    Add drops of vitamins to your formulations

    European Coatings Show NrembergApril 2015

    Dr. Denis Ruhlmann

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    Unique hydrophobic dispersant

    water resistance and much more

    New paint formulations are required to meet low-VOC or 0-VOC regulations.

    Associated risks are loosing in terms of film resistance against wet scrub, stain, earlyrain, acid, alkali burn out

    Possible impact on paint properties such as color acceptance and glossdevelopment

    Such issues can be addressed thanks to the use of an efficient and hydrophobicdispersing agent.

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    Content

    Dispersing theory

    Dispersant introduction

    Case studies

    Wrap up

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    Steric and Ionic Dispersants

    Ionic Dispersants Steric Dispersants(comb polymers)

    d

    d

    E

    +

    +

    +

    +

    +

    +

    +d

    E

    dc

    ?

    Repulsive energy between particles depends on the nature of the dispersant

    In can long term pigment stabilizationPrevents flocculation andacceleration of settling

    Maintains steric spacing and bestpigment positioning for opacity untilthe latest phases of film drying

    dc

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    Dispersing technologies

    FillersOxide

    pigments

    Coarse Fine

    CaCO3 CLAY TiO2 ZnO Fe2O3

    Ecodis P 90Ammonium salt

    WaterResistance

    Ecodis P 50Sodium salt

    Ecodis P 30Sodium salt

    Organicpigment

    Coadis 123 KPotassium salt

    Coadis BR 3Potassium salt

    GlossMatt Eggshell Satin Semi gloss

    Coadis BR 85

    +

    -

    PigmentPaste

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    Case Studies

    Interior wall paints PVC=40% Scrub resistance

    Stain resistance

    Tint strength

    Exterior wall paints PVC=60% Early water resistance

    Acid rain resistance

    Tint strength

    Exterior primer

    Alkali burnout and Salting out resistance

    High gloss alkyd emulsion paints

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    Ingredient Reference Coadis 123 K

    Millbase

    Water 132 132

    Biocide 1,7 1,7

    Neutralizing agent 4,6 4,6Polyacrylate dispersant 10,6 5

    Coadis 123 K 0 5

    Defoamer 1,8 1,8

    Rutile TiO2 176 176

    CaCO3 114,4 114,4

    Calcined clay 114,4 114,4

    Letdown

    Texanol 10,6 10,6

    Encor 662 (styrene acrylic) 387 387

    Defoamer 1,8 1,8

    Water 36,3 36,9

    Rheotech 3800 5,3 5,3

    Coapur 3025 3,5 3,5

    Total 1000 1000

    PVC=40% interior wall paint

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    The scrub resistance obtained with Coadis 123 K is much higher thanwith the current polyacrylate

    0

    500

    1000

    1500

    2000

    reference Coadis 123 K Coadis 123 Kreference

    PVC=40% interior wall paint

    Scrub Resistance

    1600 cycles

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    Hydrophilic dispersant : Water

    easily penetrates into the paintfilm

    Poor scrub resistance

    Water + detergent

    Binder

    Substrate

    Water + detergent

    Binder

    Substrate

    Hydrophobicbarrier

    Hydrophobic dispersant : Water stays

    at the paint film surface

    Better scrub resistance

    PVC=40% interior wall paint

    Scrub Resistance

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    5 liquid stains drops and 1 brushed solid stain are applied on the panels

    After 2 hours, they are moved away by water rinsing and by tissue absorption

    Using a scrub machine and 2% of washing powder solution, panels are brushed 200 timesand dried

    Anti stain resistance is expressed as a score

    PVC=40% interior wall paint

    Scrub Resistance

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    96%

    98%

    100%

    102%

    104%

    106%

    108%

    Reference 123 K Reference 123 K Reference 123 K

    Tinting strength of reference paint is set at 100%.

    Higher than 100% means a higher tint strength

    Red pigment

    Blue pigmentBlack pigment

    PVC=40% interior wall paint

    Tint Strength

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    No color change after finger rubup with Coadis 123 K for the

    tested three color,

    E of paint with Coadis 123 Kall lower than 0.5,

    Tinting strength of formulas with

    Coadis 123 K is better.

    Reference Coadis 123 K

    PVC=40% interior wall paint

    Tint Strength

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    Ingredient ReferenceCoadis 123 Kuse

    Millbase

    Water 190 181

    Biocide 1,5 1,5

    Polyacrylic dispersant 6 0Coadis 123 K 0 15

    Propylene glycol 16 16

    Surfactant 5 5

    Texanol 15 15

    Defoamer 4 4

    Rutile TiO2 150 150Hydreous clay 80 80

    Calcined clay 140 140

    HEC 4 4

    Letdow

    n

    Neutralizing agent 2 2

    Water 90,5 90,5

    Encor 2741 (acrylic) 210 210Celocor 80 80

    Defoamer 4 4

    Rheotech 3800 2 2

    Total 1000 1000

    60% PVC exterior wall paint

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    1 - White paint is applied on a black surface

    2 wait 30 minutes

    3 - Water is sprayed on the fresh coating

    60% PVC exterior wall paint

    Early rain resistance

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    With Coadis 123 KReference with

    polyacrylate

    Not resistantResistant

    60% PVC exterior wall paint

    Early rain resistance

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    Experimental

    Acid rain solutionmade of nitric acidand sulfuric acid for apH value of 3.5

    Paint tinted with 4%of iron red and

    applied on cementpanels at 200 m wet

    Panel held verticallyand poured with acidrain solution 40 times

    Note visual differencebetween panels

    Coadis 123 K Ammonium polyacrylate

    60% PVC exterior wall paint

    Acid rain resistance

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    80%

    90%

    100%

    110%

    120%

    130%

    Reference 123 K Reference 123 K Reference 123 K

    Coadis 123 K reference

    Red pigment

    Blue pigment

    Black pigment

    60% PVC exterior wall paint

    Tint strength

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    Ingredient ReferenceCoadis 123 Kuse

    M

    illbase

    Water 200 197

    Biocide 1 1Polyacrylic dispersant 5 0

    Coadis 123 K 0 8

    Neutralizing agent 1 1

    Propylene glycol 20 20

    Texanol 23 23

    Defoamer 1 1

    Surfactant 1,5 1,5

    Rutile TiO2 45 45

    Talc 260 260

    HEC 6 6

    Letdow

    n Water 104,5 104,5

    Encor 2740 (styrene acrylic) 330 330

    Defoamer 2 2

    Total 1000 1000

    Exterior Primer PVC=40%

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    Coadis 123 K

    Experimental

    0.4 g of 2% PVA/iron bluesolution is brushed on the

    primer, paraffin is used to sealto edges

    Coated cement panels aredipped into a blend made of 2%

    NaOH water solution (alkalinesolution) and a salt solutionmade of Na2SO4 / NaCl / water(5:10:85)

    After 24 hours, theappearance of the surface isexamined to detect any ironblue area having turned white,what would characterize a weak

    resistance

    Exterior Primer PVC=40%

    Alkali burnout and Salting out resistanceAmmonium salt

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    Ingredient

    Millbase

    Water 68,6 62,8

    Multipurpose dispersant (40%) 8,8 /

    Coadis 123 K (24%) / 14,6Biocide 2 2

    Neutralizing agent 0,5 0,5

    Coapur XS 22 (25%) 35 35

    Defoamer 2 2

    Rutile TiO2 265 265

    LetdownSynaqua 4804 615 615Water based drier 3,1 3,1

    Total (g) 1000 1000

    Leveling (ASTM D4062) 9 9

    Sag resistance (ASTM D4400) 10 10

    Gloss after 3 days

    20 89.5 89.0

    60 95.0 95.8

    High gloss alkyd emulsion paint

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    Conclusion

    The different possibilities offered by the unique hydrophobicdispersant Coadis 123 K

    Stain resistance

    Surfactant leaching

    Scrub resistance

    Acid and alkali resistance

    Early rain resistance

    Extending painting season

    Gloss

    Color acceptance

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    Thanks for your attention

    and for your questions

    Visit us on the Arkema booth 328 Hall 4A