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

3

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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