polymer innovations for improved performance in low voc ......tg core 107c shell 26c mfft 18c voc...

Polymer Innovations for Improved Performance in Low VOC Semigloss Neutral Base Trim PaintsCOATINGS TRENDS AND TECHNOLOGIES

ROSEMONT. IL

SEPT 10 - 11, 2019

Specialty Polymers, Inc www.specpoly.com

Neutral Bases

Universal Colorants

Potential Problems…◦Surfactant leaching

◦Poor water resistance / scrub

◦Poor block / print

◦Viscosity drop with associative

thickeners


Formulating Strategies for Neutral BasesBlends of Associative and Non-associative Thickeners

Overthickening◦ Varying colorant response◦ Cost

Associative Thickeners for High Colorant Load◦ Efficiency can vary by

polymer selection


Polymer Design for Neutral Bases:Morphology

Core Shell


Polymer Design for Neutral Bases:Ambient Temperature Crosslinking


Polymer Design for Neutral Bases:Polymer Stabilization

Reduce free water soluble ingredientsFree vs polymerizable surfactant

Acid stabilization

Selection of SurfactantsGood water resistance

Low foaming

Good polymer stability



Variables –Surfactant Leaching

Polymer Design

Formulation

Time to dry

Temperature during dry

Length of time of water exposure

Test Polymers

Core Shell Exp 1 All Acrylic Self Crosslinking◦ Tg Core 107C Shell 26C

◦ MFFT 18C

◦ VOC 100 gm/L

Core Shell Exp 2 All Acrylic Self Crosslinking◦ Tg Core 107C Shell -7C

◦ MFFT

Neutral Base Formula


Raw Materials Pounds Gallons

C/S EXP #1 Polymer 45% 744.00 83.78

Water 110.32 13.26

HMHEC 0.88 0.14

Ammonia (28%) 1.00 0.14

Hydrophobic Coalescent 4.00 0.52

NSAT KU Viscosity Stabilizer 7.30 0.84

Preservative 1.20 0.14

Silicone Defoamer 2.00 0.24

NSAT ICI Builder 8.20 0.94

Totals 878.90 100.00

Density 8.79

% Solids (Wt) 40.17

% Solids (Vol) 37.68

VOC (gm/L) 24.55

% Coalescent 2.33

C/S EXP #1


Neutral Base Viscosity Stability and Block

Untinted Visc

Untinted ICI Visc

pH

F B + KX F B + KX F B + KX F B + KX

Tinted Visc 89 KU 99 KU 102 KU 113 KU 66 KU 82 KU 99 KU 100 KU

Tinted ICI Visc 1.1 P 0.8 P 0.8 0.9 0.4 0.4 2.3 2.6

▲ KU 17 KU 7 KU 23 KU 12 KU 44 KU 28 KU 22 KU 21 KU

Low Temp

Coalescence

Blocking RT 24 Hr 5 6 6 5 8 7 6 6

Blocking RT 7 day 8 9 5 6 6 8 4 5

Blocking 120 F 3 6 4 4 5 7 0 4

Print Resistance 6 8 6 8 4 4 0 2

CommercialComp 1CS EXP 1 CS EXP 2

PassPass Pass

121 KU

3.2

8.44

106 KU

0.9

8.97

125 KU

1.0 P

9.27

Pass

110 KU

0.5 P

8.79


Neutral Base Adhesion, Scrub, Flow and Sag

F B + KX F B + KX F B + KX F B + KX

Tinted Visc 89 KU 99 KU 102 KU 113 KU 66 KU 82 KU 99 KU 100 KUAdhesion to alkyd 5B 4B 5B 5B 5B 5B 5B 5B

Scrub resistance

Rub Up ΔE 0.61 0.14 1.38 0.75 2.53 2.82 0.33 1.13

Flow 9 5 10 5 10 10 6 7

Sag Resistance 16 24 14 24 4 10 24 16

Dirt Pickup ΔE 0.52 1.07 1.21 7.92

321/436 672/786 142/224210/267

CommercialComp 1CS EXP 1 CS EXP 2

Neutral BaseSurface Wetting – 4 Hour Dry


CS EXP 1 CS EXP 2 COMP 1 Commercial

Pastel BasesScrub, Adhesion and Stain Resistance


Property C/S EXP #1 C/S EXP #2 Competitive 1 Commercial

Volume Solids 35.18 35.18 35.18 n/a

PVC 22.24 22.24 22.24 n/a

VOC (gm/L) 92.1 45.3 45.3 90 (Label)% Plasticizer 2.4% 2.4% 2.4%

% Texanol 6.6 None None

Tg Polymer 26 / 107 -7 / 107 8 / 41

Viscosity Stability

Viscosity, Pre-Colorant 115.0 116.0 110.0 100.0

Viscosity, 4 oz 888 1:1 C: E 93.0 93.0 101.0 94.0

Delta Viscosity, 4 oz 888 1:1 C: E -22 -23 -9 -6

Gloss - Untinted, Leneta 2C, 3 mil

20° Gloss 35 38 30 57

60° Gloss 67 70 65 79

Scrub - 7 mil, Shim, ASTM D2486

First Break 676 Control 433 380

First Break, Control 645 575 700

Cut Through 902 469 504

Cut Through, Control 825 730 888

Stain Resist - Cleaned with 1% Tide Solution,

200 Cycles 1 Week Age, ΔE vs Unstained

Red Wine ΔE 2.99 2.63 3.06 0.74

Mustard, ΔE 14.94 18.93 21.24 9.30

Coffee, ΔE 9.12 9.03 7.20 1.06

Lipstick, ΔE 5.94 8.91 10.47 3.41

Leneta ST-1 Oil Stain, ΔE 1.46 1.93 1.68 1.24

Pastel BasesBlock, DPU and Color Acceptance


Property C/S EXP #1 C/S EXP #2 Competitive 1 Commercial

Volume Solids 35.18 35.18 35.18 n/a

PVC 22.24 22.24 22.24 n/a

VOC (gm/L) 92.1 45.3 45.3 90 (Label)% Plasticizer 2.4% 2.4% 2.4%

% Texanol 6.6 None NoneTg Polymer 26 / 107 -7 / 107 8 / 41

Dirt Pick Up - 1 Week Dry, Iron Oxide Slurry

Δb* vs Clean 1.29 1.75 9.96 21.72

Blocking - 1 Week Dry, 1-10 Rating, 10 Best, Early, Room Temp (18 Hour) 8/8 7/7 7/7 3/0

7 Day Dry, Room Temp (18 Hour) 9/9 8/8 8/8 5/5 7 Day Dry, High Temp (30 Min, 120°F) 9/9 9/8 9/9 8/8

Color Acceptance - 4 oz 1:1 888 Yellow

Oxide: Phthalo Blue, Leneta 1B, 3 mil

Rub Up, ΔE vs Unrubbed (Unsealed) 1.09 0.26 1 1.01

Rub Up Visual V Sl Darker None Sl Bluer Sl Yellower

L* 74.83 74.74 72.57 68.48

a* -10.49 -10.35 -11.25 -12.85

b* 2.13 1.87 3.57 4.46

ΔE vs Control 0.30 Ctrl 2.88 7.01

Coalescence at 40 F - 3 mil, Leneta 2C Pass/Fail; Pass = No Cracking Pass Pass Pass Pass

Dirt Pick Up Resistance – One Week Dry

CS EXP 1 CS EXP 2 COMP 1 Commercial


Conclusions

Thickeners for reduced viscosity drop are very polymer specific in efficiency

C/S Exp #2: Low VOC Core Shell Self Crosslinking Acrylic

◦ Softer shell for improved film formation at low VOC

◦ Very hard core for good block and print resistance

◦ Self crosslinking for good scrub and dirt pick up resistance


Thanks

Gregory MonaghanContact: [email protected]

T H E I N F O R M AT I O N C O N TA I N E D I N T H I S P R E S E N TAT I O N I S I N T E N D E D T O B E A G U I D E L I N E . I T I S O F F E R E D I N G O O D F A I T H , B U T W I T H O U T G U A R A N T E E . W E R E C O M M E N D U S E R S O F T H E P R O D U C T S P E R F O R M T H E I R O W N T E S T I N G T O D E T E R M I N E T H E S U I TA B I L I T Y O F T H E P R O D U C T S I N T H E I R A P P L I C AT I O N .


polymer innovations for improved performance in low voc ......tg core 107c shell 26c mfft 18c voc...

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