March 2017
EPOTUF® 37-680
(United States Patent Number: 5204385)
Product Code: 37680-00
Water-borne Epoxy Curing Agent
DESCRIPTION
®
EPOTUF 37-680 is a patented amine functional dispersion that is used to formulate two component water-borne
epoxy coatings with properties comparable to conventional solvent based two component epoxy coatings.
APPLICATIONS



Concrete sealers, primers and topcoats
Direct-to-metal enamels
Factory equipment coatings


Industrial maintenance coatings
Architectural coatings



Good yellowing resistance
Low odor and easy clean-up
Excellent elevated temperature and freeze-thaw
stability
FEATURES



Tack free dry times < 1 hour
Long pot life > 8 hours
Excellent corrosion and chemical resistance
properties
TYPICAL PROPERTIES
Percent Solids, Weight
Percent Solids, Volume
Appearance
Viscosity, cps, 25°C
Particle Size, Microns
Weight per Gallon, Pounds
Amine Hydrogen Equivalent Weight, Solids
Amine Hydrogen Equivalent Weight, Solution
Volatiles, Weight
42
39
Milky white emulsion
60
0.1
8.9
563
1340
9% Ethylene Glycol Monopropyl Ether / 49% Water
STORAGE
Store in the original sealed containers in typical warehouse conditions, 40-90°F, to ensure a shelf life of at least
one year.
SAFETY
®
Read the EPOTUF 37-680 Safety Data Sheet before handling, storing, or using this product.
919-990-7500 ● 800-448-3482● P.O. Box 13582 Research Triangle Park, NC USA 27709 ●1035 Swabia Court, Durham, NC USA 27703 ● www.reichhold.com
SUGGESTED FORMULATIONS
Anti-Corrosive Primer
Gloss White Enamel
Part A – Curing Agent Component
Lbs.
Gals. Material
®
194.4 21.94 EPOTUF 37-680
2.9
0.40 Patcote 841M defoamer
33.0
4.54 Arcosolv PTB, Propylene Glycol t-Butyl
Ether
33.0
4.39 EB, Ethylene Glycol Monobutyl Ether
11.3
1.28 Dowanol PPH, Propylene Glycol Phenyl
Ether
(1)
(2)
Premix for 3 minutes:
100.7
2.35 Red Iron Oxide R5098D
230.4
9.52 Wollastocoat® 10 ES
100.0
3.33 Heucophos ZBZ
(4)
(5)
Part A – Curing Agent Component
Lbs.
Gals. Material
®
175.5 19.81 EPOTUF 37-680
2.6
0.35 Patcote 841M defoamer
32.3
4.44 Arcosolv PTB, Propylene Glycol t-Butyl
Ether
32.3
4.30 EB, Ethylene Glycol Monobutyl Ether
15.1
1.71 Benzyl Alcohol
(3)
Premix for 3 minutes:
280.3
8.42 Ti-Pure R-960 Titanium Dioxide
(1)
(2)
(3)
High-speed grind to 5 N.S.:
®
227.1 25.63 EPOTUF 37-680
21.2
2.76 PM, Propylene Glycol Monomethyl
Ether
32.2
3.86 Deionized Water
966.8 80.00 TOTAL, Part A
High-speed grind to 7 N.S.:
®
307.2 34.67 EPOTUF 37-680
21.6
2.81 PM, Propylene Glycol Monomethyl
Ether
29.1
3.49 Deionized Water
896.0 80.00 TOTAL, Part A
Part B – Epoxy Resin Component
®
82.0
9.30 EPOTUF 37-143
89.0 10.70 Deionized Water
171.0 20.00 TOTAL, Part B
Part B – Epoxy Resin Component
®
92.0 10.43 EPOTUF 37-143
79.6
9.57 Deionized Water
171.6 20.00 TOTAL, Part B
Thoroughly mix four (4) parts PART A to one (1) part PART B by
volume. Spray unreduced.
Thoroughly mix four (4) parts PART A to one (1) part PART B by
volume. Spray unreduced.
Analysis:
28.5
1.7 : 1
57.4
40.0
11.4
105
2.8 : 1
10 / 30
256
2.14
>8
Analysis:
21.95
0.96 : 1
53.4
38.4
10.7
2.9 : 1
1 Hour
275.6
2.3
Pigment Volume Concentration, Percent
Pigment : Binder Ratio
Percent Solids, Weight
Percent Solids, Volume
Weight per Gallon, Pounds, Calculated
Viscosity, cps at 25C
Water : Solvent Ratio
Dry Times, Set-to-Touch / Tack-Free, Minutes
VOC, Grams per Liter
VOC, Pounds per Gallon
Pot Life, Hours
Suppliers:
(1) Hydrite Chemical Co.
(2) LyondellBasell
(3) Dow Chemical Co.
Pigment Volume Concentration, Percent
Pigment : Binder Ratio
Percent Solids, Weight
Percent Solids, Volume
Weight per Gallon, Pounds, Calculated
Water : Solvent Ratio
Zapon Tack-Free Time, 200 Gram Load
VOC, Grams per Liter
VOC, Pounds per Gallon
Suppliers:
(1) Hydrite Chemical Co.
(2) LyondellBasell
(4) Elementis
(5) Imerys
Chemical Resistance
3 Mil Film on CRS Panels,
7-Day Room Temperature Cure
10% Acetic Acid
Poor
10% Hydrochloric Acid
Fair
10% Sulfuric Acid
Poor
10% Sodium Hydroxide
Excellent
Methanol
Fair
Toluene
Good
Unleaded Gasoline
Excellent
Skydrol 500B-4
Excellent
MEK Double Rubs
>200
®
EPOTUF 37-680 (37680-00)
2
(3) Chemours
SUGGESTED FORMULATION
Clear Concrete Coating
Part A – Curing Agent Component
Lbs.
Gals. Material
529.0 59.70 EPOTUF 37-680
9.2
1.25 Patcote 841 defoamer
36.5
4.99 Arcosolv PTB, Propylene Glycol t-Butyl
Ether
58.5
7.83 2-Butoxy Ethanol
43.7
5.24 Deionized Water
8.7
0.99 Igepal CO-630 surfactant
685.6 80.00 TOTAL, Part A
(1)
(2)
Analysis:
8.6
36.2
330
2.8
(3)
Suppliers:
(1) Hydrite Chemical Co.
(2) LyondellBasell
Weight per Gallon, Pounds
Percent Solids, Weight
VOC, Grams per Liter
VOC, Pounds per Gallon
(3) Rhodia
Part B – Epoxy Resin Component
101.3 11.33 EPOTUF 37-143
72.3
8.67 Deionized Water
173.6 20.00 TOTAL, Part B
TYPICAL PERFORMANCE DATA
Film Properties
3 Mil Wet Film, 7-Day Cure at 25C
Dry Time, Hours
25C, 50% RH
50F, 80% RH
Pencil Hardness
Impact (Direct / Reverse), Inch-Pounds
Flexibility, 1/8” Mandrel
Taber Abrasion, mg Loss, CS-17 / 1000g / 1000 Cycles
Adhesion to Wet Concrete
Hot Tire Pick-Up
10% Acetic Acid
10% Hydrochloric Acid
10% Sulfuric Acid
10% Sodium Hydroxide
10% Ammonium Hydroxide
Chemical Resistance
Good
2% Nitric Acid
Excellent
Xylene
Excellent
Skydrol 500B-4
Excellent
Water
Excellent
MEK Double Rubs
0.25
6.0
H
160 / 160
Pass
112
Not Recommended
Very Good
Excellent
Excellent
Excellent
Excellent
200
FORMULATING INFORMATION
Addition of a co-solvent such as butyl cellosolve aids in obtaining
rapid pigment grind. DO NOT USE ADDITIONAL WATER IN THE
GRIND. Temperature during grinding should not exceed 130F.
Benzyl alcohol and propylene glycol phenyl ether (PPH) contribute
to the system thixotropy, acting as thickening agents. These types of
solvents tend to remain in the cured epoxy film and are considered
100% non-volatile. Their use should be limited to that level required
for thickening so as to minimize possible effects on performance.
Soft settling of either Part A or Part B is normal and can be easily redispersed with agitation.
Sodium nitrate, a flash rust inhibitor, is not compatible with
EPOTUF® 37-680. However, formulations based on EPOTUF®
37-680 have not exhibited flash rusting in the laboratory.
In the finished two-component paint formulation, a maximum waterto-solvent ratio of 3:1 maintains good gloss and early water
resistance. The choice and level of co-solvent can affect gloss,
corrosion resistance, and dry times. Alcohols such as secondary
butanol and n-isopropyl alcohol may produce undesirable film
defects depending on the amount used. Ketones and aromatic
solvents are not recommended. Glycol ethers and glycol ether
acetates are preferable.
Stainless steel processing equipment is recommended to minimize
metal ion contamination.
No induction time is required for this system.
®
EPOTUF 37-680 (37680-00)
3