albemarle corporation baton rouge labaton rouge, la... · ethacure® 90 aliphatic curing technology...
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ETHACUREETHACURE®® 9090Aliphatic Curing TechnologyAliphatic Curing TechnologyAliphatic Curing TechnologyAliphatic Curing Technology
Albemarle CorporationBaton Rouge LABaton Rouge, LA
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ETHACURE® 90• New-to-the-world slow curing, high performanceNew to the world slow curing, high performance
aliphatic amine curative• Recently passed final regulatory approval by
the EPA in the US• Global rollout slated for 2011• Provides SPUA coatings with excellent color/UV
stability, adhesion and gloss• Water-white color and low viscosity• Moderate reactivity allows excellent cure rate control
in both aliphatic and aromatic polyurea systems• Applications in truck-bed liners, potable water,
concrete & steel coatings and industrial coatings• Due to its very slow cure, can be used with lower ETHACURE® 90
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cost aliphatics like IPDA to lower costs and improve properties
Commercial Polyurea CurativesC i R l i S d D i iCurative Relative Speed DescriptionIPDA fastest Primary cyclo-aliphatic
NH2
NH2
H-BMDA* Secondary cyclo-aliphatic NH
NH
CH3
NH
CH3
NH2H2N
*Hydrogenated butyl MDA
ETHACURE® 100 Primary aromaticNH2
NH2H2N
NH2 80:20
ETHACURE® 90 Secondary aliphatic
®
NH
HN
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ETHACURE® 420 slowest Secondary aromaticNH
NH
Reactivity of Some Current Aliphatic Chain-extenders
1:1 Aliphatic system using IPDI w/ 15% NCO
Curative IPDA H-BMDA1 ETHACURE 902
Gel Time, sec. <1 22 46
1 2 ring secondary cyclo aliphatic diamine1. 2 ring secondary cyclo-aliphatic diamine2. Straight chain secondary aliphatic diamine
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General Polyurea Formulation Usedfor 95A Shore hardness coating
A Side B Side
Isocyanate Prepolymer
Curative(~50% of B)
(100% of A)
D-2000 PEA(~47% of B)
T 5000 PEA
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T-5000 PEA(~3% of B)
Aliphatic Blend Comparisons
• ETHACURE® 90 1.051.051.051.05Tecnate® 785: index
A Side
90H-BMDAFormulation ®ETHACURE
can be blended at higher IPDA ratios
• Lower overall system cost
55.6052.8143.2439.81D-2000 PEA
B Side Components
system cost
--48.7356.03H-BMDA
10.247.133.48-
5.115.144.554.16
--
-
T-5000 PEA
IPDA
37:6325:7512:880:100IPDA:Curative ratio (eq:eq)
29.0534.92--ETHACURE® 90
:
--
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( q q)12261122Gel Time, sec.
Aliphatic Blend Properties
12261122Gel Time, sec
Properties
Formulation
Properties
Formulation 90®ETHACUREH-BMDA
1625179710261064Tensile St psi
92959295Hardness, A
0.0640.0660.0670.067Thickness, in
14871575--M-300, psi
8589099501010M-100, psi
1625179710261064Tensile St, psi
0.880.860.910.94Density, g/cc
304344334344Die C Tear, pli
337346169142*Elongation, %
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*brittle at separation
y, g
UV StudyE l t d b th ti d li h ti t• Evaluated both aromatic and aliphatic systems
• No stabilizers added
• Atlas Ci35A Xenon Arc Weatherometer
• Used ASTM G 26 (A) protocol• Used ASTM G-26 (A) protocol» 102 min UV, 18 min. UV and water Spray(2 hr)» 300 hours duration
• Color evaluation by Hunter Colorimeter
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UV Study: Formulations
B side
IPDI / 15IPDI / 15IPDI / 15IPDI / 15MDI / 15MDI / 15ISO / % NCO
17161312104 17161312104Formulation
5.114.554.164.745.356.42
55.6043.2439.8146.0850.9956.77
B side
D-2000 PEA
T-5000 PEA
10.243.48----
-----18.60
----5.8918.21
IPDA
ETHACURE® 420
ETHACURE® 100
29.05--49.1737.77-ETAHCURE® 90
12112246109G l ti
-48.7356.03---H-BMDA
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12112246109Gel time, sec.
UV Study: Panels
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Mix Pressure StudyBase Formulation at 1.05 Index
A Side (RT viscosity = 1000 cPs; Temp. = 60 °C)15% NCO IPDI Prepolymer
B Side (RT viscosity = 100 cPs; Temp. = 30 °C)D-2000 PEA (wt) 56.19T 5000 PEA ( t) 5 12T-5000 PEA (wt) 5.12IPDA (wt) 11.04ETHACURE® 90 (wt) 27.65
IPDA:E90 (equivalents) 40:60Gel Time (sec.) 18
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Spray Equipment
Graco® Fusion MP Gun
Graco® E-XP2 Proportioner
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Graco E XP2 Proportioner
Mix Pressure Study ResultsTensile Strength and % Elongation
vs PressureTensile2500 500
gth
(psi
) Elongation
n (%
)2000 400
nsile
Str
eng
Elon
gatio
n
1000
1500
200
300
Ten
0
500
1500 1650 1825 1975 2100 2300 25000
100
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Mix Pressure (psi)1500 1650 1825 1975 2100 2300 2500
Index StudyI d i ti f I t (A id ) t C ti (B id )• Index is ratio of Isocyanate (A side) to Curative (B side)
» > 1.00 means excess iso is used
• Used previous Base Formulation as 1.05» IPDI Prepolymer at 15% NCO» Curative = IPDA: E90 (40eq:60eq)» Curative = IPDA: E90 (40eq:60eq)
• Varied index» Formulations adjusted due to 1:1 ratio» Formulations adjusted due to 1:1 ratio» Could have also adjusted % NCO
• Use prepolymers
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• Difficult to find/make prepolymers with precise % NCO
Index Study – ETHACURE®90
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Index Study: Property Results
1.151.131.111.091.071.051.010.97Index87654321Formulation
2017188219112082188920372050940Tens. St. psi
9291929393959394Hardness, A
2020191918181817Gel Time, s
1456146014381452151815711632M 300 i
821800778857862903941807M-100, psi
425377405482381331389193Elong., %
p
-
1456146014381452151815711632-M-300, psi
320309353318313321327271Tear Die-C, pli
-
-
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Index Study: Conclusions• Tensile and Tear strength change very little above
1.00 under our test parameters
• Elongation increases with index» May be consequence of formulation changes
needed to maintain 1:1 ratios
• All properties tested decrease below 1.00 indexAll properties tested decrease below 1.00 index
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For more information regarding Albemarle’s g gcuratives, please visit www.curatives.com
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