Novel Waterborne Epoxy Curing Agent Technology
description
Transcript of Novel Waterborne Epoxy Curing Agent Technology
Novel Waterborne Epoxy Curing Agent Technology
David DubowikAir Products & Chemicals
Presented at the TRFA Annual Meeting November 15, 2005Fort Lauderdale, Florida
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Outline: Novel Waterborne Epoxy Curing Agent
Waterborne Epoxy Overview
Market Drivers
Novel Curing Agent Technology
Performance Attributes
Summary
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• Institutional & Maintenance Coatings
• Low Odor • Easy Handling
• Abrasion Resistance• Alkali & Acid Stain Resistance
Typical WB Epoxy Applications
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Waterborne Epoxy...The Basics
ReactiveOrganic
PhaseWater
Polymer
Water Evaporation
ReactiveOrganic
PhaseWater
Polymer
Water Evaporation
Epoxy & Amine Dispersed in Water
H2O Evaporates Epoxy & Amine PolymerizeCoating Applied
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Type I Waterborne Epoxies
Amine acts as Epoxy Emulsifier Water + Amine + Epoxy form Complex Emulsion Emulsion Destabilizes Visible Pot Life Liquid Epoxy Short Pot Life, Slow Dry
Liquid Epoxy
Water Soluble Amine
Water - Amine- Epoxy Emulsion+
High Shear
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Type II Waterborne Epoxies
Water Soluble Amine+
Epoxy Dispersion
Surfactant
Epoxy Pre-dispersed with Nonionic Surfactant Amine Migrates from Water into Epoxy Polymerization Inside Particle Blind Pot Life Solid Epoxy Long Pot Life, Fast Dry Co-Solvents Needed for Coalescence
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Type I & II Curing Agent Limitations
Property Type I Type II
Viscosity > 10,000 cP > 5,000 cP
Color > 6 > 6
Co-Solvents 0-100 g/l 100-250 g/l
Water Solubility Medium - High Moderate - Medium
Maximum Film Build 6 mil DFT 5 mil DFT
Curing Agents Trap Water, Limit Film Build
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Market Drivers for New Technology
Easier Handling– Lower Viscosity– Higher Water Dilution– No Induction Time
Lower Color– Lower Initial Color– Higher Yellowing
resistance
Higher Film Build– Mastics– Block Fillers
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Novel Waterborne Epoxy Technology Anquawhite 100
0.5High Viscosity
Low Viscosity
0.5High Viscosity
Low Viscosity
Amine Functional Dispersion in Water• Water Insoluble• Highly Compatible with Epoxy
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Anquawhite 100 Properties
350AHEW
1Color, Gardner
Water 41%PM 4%
Solvents
55%Solids
200 cPViscosity
Freeze-Thaw Cycles > 5
Low Amine Content Improves• Yellowing• Stain Resistance
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Anquawhite 100 + Epoxy Dispersion Film Formation
Epoxy Dispersion Amine Dispersion
Particles Coalesce
Minimal Epoxy-Amine
Interaction
Low ViscosityHigh Solids
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30
60
90
120
0 1 2 3 4 5 6Pot Life (hr)
60
°Glo
ss
/ c
P
Gloss
Viscosity
Anquawhite 100 + Epoxy Dispersion Long Pot Life & High Gloss
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Anquawhite 100 - Liquid EpoxyFilm Formation
Liquid Epoxy
Amine Dispersion
Particles Coalesce
Epoxy +
Amine
Amine Emulsifies
Liquid Epoxy
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Pot Life with Liquid Epoxy
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2000
4000
6000
8000
10000
0 100 200 300 400 500
Time [min]
Vis
cosi
ty 2
5°C
(m
Pa.
s) 65% solids
60% solids
55% solids
0
2000
4000
6000
8000
10000
0 100 200 300 400 500
Time [min]
Vis
cosi
ty 2
5°
65% solids
60% solids
55% solids
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Low Amine Content Delivers High Resistance to Yellowing
0
20
40
0 20 40 60 80
Hours QUVA
Yel
low
ness
Inde
x
Cycloaliphatic Amine
Typical Waterborne
Anquawhite 100 Solid Epoxy Dispersion
Anquawhite 100 Liquid Epoxy
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Hydrophobic Amine: Less Trapped Water, Higher Film Build
0
4
8
12
16
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Max
imum
DFT
(mils
)
Type I Type II Anquawhite 100Liquid Epoxy
Anquawhite 100Solid Epoxy
Anquawhite 100
20 mil DFT
Typical WB Epoxy20 mil DFT
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Low Amine Content Results in High Stain Resistance
slightred stainnovery slight stainRed Wine
slightyellow stainnono changeMustard
noslight stainnono changeKetchup
noslight stainnono changeCoffee
BlisteringDiscolorationBlisteringDiscoloration
Anquawhite 100 Conventional Waterborne
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Anquawhite 100 Food Stain Resistance
Typical WB Epoxy
Coating
Anquawhite 100
Coating
Ketchup
MustardKetchup
Mustard
Red Wine
Red Wine
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Anquawhite 100 Hydrophobicity Results in High Barrier Properties
4.50
5.00
5.50
6.00
6.50
7.00
7.50
8.00
8.50
9.00
-1.00 0.00 1.00 2.00 3.00 4.00 5.00
Log Freq (Hz)
Log
Mod
ulus
(O
hm) Anquawhite 100
75 day immersion
Conventional Waterborne 25 day immersion
Electrochemical Impedance Spectroscopy
Coating Failure
Anquawhite 100 Forms an Excellent Barrier Against Water & Salts
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Starting Point Formulation: Fast Dry Enamel
Pounds GallonsA Side
413.6 45.1 RM 8W (25% in H O ) 41.4 5.0
455.0 50.00B Side
Anquawhite100 144.8 16.5188.2 22.6
Disperbyk190 10.3 1.2DF 110D 4.1 0.50R 960 289.5 8.9Surfynol420 3.1 0.4
640.1 50.00
47% Solids
65% Wt Solids
Pounds GallonsA Side
Ancarez AR 550 413.6 45.1
241.4 5.0455.0 50.00
B SideAnquawhite100 144.8 16.5DI H2O 2 188.2 22.6Disperbyk190 10.3 1.2DF 110D 4.1 0.50R 960 289.5 8.9Surfynol420 3.1 0.4
640.1 50.00
0.11 VOC (lb/gal) 19 %PVC
47%Vol65%
Dry to Touch 15 min. Pot Life 8 hr.
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Starting Point Formulation: High Build Enamel
Pounds GallonsA Side
Epon 828 155.69 16.08Epodil 748 29.22 3.93
20.0B SideAnquawhite 100 325.11 37.10DI H2O 68.35 8.19Disperbyk 190 15.19 1.72DF 110D 3.80 0.45Rheology Modifier 15.19 1.825% Acetic 121.52 14.56Dowanol PPh 52.40 5.91TiPure R 960 311.39 9.57Surfynol 440 5.70 0.68
918.65 80.0
PVC 19.4%VOC (lb/gal) 1.26Wt Solids 64%Vol Solids 53%
Dry to Touch 4 hr
Pot Life 2 hr
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Summary
Novel Amine Dispersion Technology
Low Viscosity
High Build
Low Yellowing
High Stain Resistance
High Water Resistance
Formulating Versatility
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Questions ?
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Thank You !!!
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