Anquamine™ 721 Waterborne Curing Agent Preliminary Technical Datasheet
DESCRIPTION
Anquamine™ 721 is a waterborne curing agent for use with standard liquid epoxy resin. Anquamine 721 is specifically designed for cost effective concrete floor coatings at up to 300 micron applied film thickness. Anquamine 721 easily emulsifies standard liquid epoxy resins; the use of emulsifiable resins is not required.
PERFORMANCE ADVANTAGES
•Cost effective concrete protection
•Fast drying times
•Low colour and good yellowing resistance
APPLICATIONS
•Pigmented concrete coatings (100-300 microns) •Concrete primers
STORAGE LIFE
At least 12 months from the date of manufacture in the original sealed container at ambient temperature.
HANDLING PRECAUTIONS
Refer to the Material Safety Data Sheet for Anquamine 721 curing agent.TYPICAL PROPERTIES
Appearance Amber Liquid Colour1 (Gardner) <5 Viscosity2 @ 25 °C, [Pa.s] 25-45 Amine Value3, [mg KOH/g] 150-190 Specific Gravity @ 25°C    1.05 Total Solids Content, [wt %] 48-52 Equivalent Wt/{H} 300 Recommended use Level 4, [PHR] 140-180 TYPICAL HANDLING PROPERTIES*
Pot Life @ 23°C 4, [hrs] 1-2 Thin Film Set Time 4, 5Phase II  @ 23°C, [hrs]    3.5
Phase III  @ 23°C, [hrs]    5.5 Persoz Hardness 4  1 day  @ 23°C 175
7 day @ 23°C 260 * All data generated using a use level of 150 PHR with Bisphenol A diglycidyl ether epoxy resin (EEW=190) at 40% mixed solids
TYPICAL PERFORMANCE PROPERTIES
Typical cure schedule 2-7 days
1 ASTM D 1544-80
2  Brookfield RVTD, Spindle 4
3  Perchloric Acid Titration
4  With Bisphenol A diglycidyl ether (EEW=190)
5  BK Drying Recorder
Air Products Chemicals Europe B.V., Kanaalweg 15, P O Box 3193, 3502 GD Utrecht, The Netherlands
Tel +31 30 2 857100  Fax +31 30 2 857111, www.airproducts/chemicals
The information contained herein is offered without charge for use by technically qualified personnel at their discretion and risk.  All statements, technical information and recommendations contained herein
are based on tests and data which we believe to be reliable, but the accuracy or completeness thereof is not guaranteed and no warranty of any kind is made with respect thereto.
CURING AGENT CHARACTERISTICS
D ILUTION P ROFILE
Anquamine 721 waterborne curing agent exhibits good viscosity reduction upon dilution with water. Figure 1 represents the viscosity dilution profiles of Anquamine 721 compared to Epilink® 360 and Epilink 701. Epilink 360 is an industrial standard water soluble polyamide and exhibits high viscosity retention on dilution. Experimental curing agent, Anquamine 721 offers the benefit of a system which shows good viscosity on dilution with retention of viscosity at low solids for cost effective concrete primer and paint applications. This property is ideal to formulate and apply high body paint at low solids.
% Solids
V i s c o s i t y  @ 23°C  (P a .s )
Figure 1 – Dilution profile Epilink® 360, Epilink 701 and Anquamine 721
P OT LIFE P ROFILE
The viscosity profile of experimental curing agent Anquamine 721 exhibits a stable viscosity for at least 60 minutes to yield cured coatings with a high and constant gloss and hardness throughout the pot life.  After 60-90 minutes a sharp increase in viscosity represents a visible end of pot-life.
Time (mins)
V i s c o s i t y  (m P a .s )
S p e c u l a r  G l o s s
Figure 2 – Viscosity profile and 60° Gloss of Anquamine 721 with Liquid Epoxy Resin
C OATING P ROPERTIES
Anquamine 721
P e r s o z  H a r d n e s s  @ 23°C
Anquamine 721
B K  T h i n  F i l m  S e t  T i m e  (h o u r s )
Figure 3 – Hardness Development and Dry Speed of Anquamine 721 with Liquid Epoxy Resin @ 23°C
Figure 3 shows the hardness development and Beck Koller, Thin Film Set Times of Anquamine 721 cured with an unmodified Bisphenol A diglycidyl ether epoxy resin using a mix ratio of 150 PHR. Experimental curing agent, Anquamine 721 yields coatings with an ultimate hardness of approximately 300 as measured by Persoz pendulum hardness with undiluted liquid epoxy resin.
It is recommended to use Anquamine 721 at advised stoichiometry of 150PHR (EEW=190). Anquamine 721 can be used at 10-15% above the recommended loading to accelerate hardness development and increase ultimate hardness by 25% without negatively impacting other properties.
R ECOMMENDED E POXY R ESINS
Experimental Curing Agent, Anquamine 721 exhibits good compatibility with standard liquid epoxy resins based on Bisphenol A or F.  Reactive diluent modified epoxy resin will offer improved handling and formulating latitude within coating formulations.  As with all systems, the inclusion of diluents will retard the hardness development and ultimate hardness of coated films.  Resins modified with reactive diluents, such as Epodil® 748 or hexanediol diglycidyl ether, exhibit very good compatibility and produce films of high clarity and gloss. A modification level of approximately 10% to yield a resin viscosity of approx. 2,000mPa.s is ideal to give a good balance of handling and property development.
D ISPERSANTS / D EFOAMERS / W ETTING
Defoamers such as Surfynol® DF62 and BYK 045 are very suitable for use in coating formulations to give optimum air release and surface properties. ZetaSperse™ 1600 and Disperbyk 190 can be used to effectively aid in wetting out pigments and increasing flow and levelling properties to give a system which yields good surface and flow properties.
R HEOLOGY MODIFIERS
The Rheology of formulations with Anquamine 721 can be effectively controlled with the use of Thixotropic agents such as polyurethane thickeners and Bentonite clays. Tafigel® PUR-55 (Münzing-Chemie) has shown good Thixotropic properties in paint formulations with Anquamine 721, allowing for good application viscosity and anti-sag performance. However, due to the inherent thixotropy of Anquamine 721 systems can be formulated without the need of external thickeners.
G REY M ATT P RIMER (ROLLER, BRUSH & SPRAY),W ATER D ILUTABLE
This formulation is ideally suited as a primer or topcoat for concrete floor coatings at 100-300 micron applied film thickness.  The highly filled paint provides a cost effective, fast touch dry and good hardness (6H) when cured.
After mixing Part A and B approximately 10 – 15 parts of water may be required to adjust viscosity for application.
Technical Data
Mixing ratio Weight    5.0 :1 PVC % 27.6
Volume    4.0: 1 Pot-life minutes ~90 Density (g/ml) - Part A    1.40 Gloss (85°) 10 – 20
reactive diluent- Part B.    1.12 BK Dry time 23°C
- Mix    1.35 Phase I hours 0:30 Solid Content  - Part A 56.0 Phase II hours 1:00 (weight %) - Part B 100.0 Phase III hours 4:30
- Mix 63.0 Pencil Hardness
mPa.s 300 7 day 6H
Mix Viscosity @
25°C
D ESCRIPTION
This grey concrete primer system is prepared by mixing Component A with Component B for
2-3 minutes using hand mixing to produce a homogeneous mixture. Once mixed water may be slowly added to give the desired application viscosity and mixed for 1-3 minutes before application. To produce a coating with an initial application viscosity of 300-500 mPa.s, addition of 10 – 15% water is required.
C LEAR-COAT P RIMER S YSTEM B ASE
D ON A NQUAMIN
E 721W ITH L IQUID E POXY R ESIN
Clear-coat
A-Component
1. Curing Agent
2. Diluent Anquamine 721
Water
Air Products
Local
60.0
15.0
B-Component
3. Epoxy Resin  DER 331 Dow Chemical 40.0
Sub Total 115.0 Mix part A & B until emulsion is homogeneous
C-Component  - General Primer (40% solids)
4. Diluent  Water Local 60.0 After mixing Part A and B, water addition is required to adjust to application viscosity.
Technical Data
Mixing ratio  - A to B to C weight 75 : 40 : 60
Density  - Part A / B / C g/ml    1.03 / 1.12 / 1.00
- Mix g/ml    1.03
Solid Content - Part A / B / C % 40 / 100 / 0
- Mix % 40
Pot-life minutes 60-90
Mix Viscosity
- Initial
- 60 minutes - 90 minutes mPa.s
mPa.s
mPa.s
200
280
1400
Dry-time (BK Recorder)
- Phase II - Phase III hours
hours
3.5
5.5
Persoz Hardness 24 hour
7 day
14 day 175 260 300
D ESCRIPTION
This clear coating which is ideal as a concrete primer system is prepared by taking 60 parts of Anquamine 721 and diluting to 40% solids. This is then mixed with 40 parts of component B for 2-3 minutes using hand mixing to produce a homogeneous emulsion. Once the emulsion is formed, water is slowly added to give the desired application viscosity and mixed for 1-3 minutes before application. To produce a coating with 40% mixed solids 60 parts of water is required, this will give an initial application viscosity of 100 – 200 mPa.s.

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