ETHACURE® 300 Applications - DB Becker

FOR ADDITIONAL INFORMATION,
CALL OR WRITE:
AMERICAS
Albemarle Corporation
451 Florida Street
Baton Rouge, LA 70801-1765
Phone: 800-535-3030
225-388-7402
Fax: 225-388-7848
EUROPE, MIDDLE EAST, AFRICA
Albemarle S.A.
Parc Scientifique Einstein
Rue du Bosquet 9
B-1348 Louvain-la-Neuve Sud, Belgium
Phone: 32-10-48-1711
Fax: 32-10-48-1717
ASIA PACIFIC
Albemarle Asia Pacific Company
111 Somerset Road # 13-03
Singapore 238164
Phone: 65-732-6286
Fax: 65-737-4155
Albemarle Asano Corporation
16th Floor, Fukoku Seimei Bldg.
2-2, Uchisaiwaicho, 2-Chome
Chiyoda-ku, Tokyo 100, Japan
Phone: 81-3-5251-0791
Fax: 81-3-3500-5623
INTERNET
www.curatives.com
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ALBEMARLE
C O R P O R A T I O N
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14.0067
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, ALBEMARLE, ABZOL, ADMA, ADMOX, ASUR, BT-93, BT-93W, CLEARBROM, DAMA, ETHACURE, ETHANOX, EZA, NcendX, SANIBROM, SAYTEX, WELLBROM,
WELLGUARD, We Can Do That, and 8010 are trademarks of Albemarle Corporation.
The information presented herein is believed to be accurate and reliable, but is presented without guarantee or responsibility on the part of Albemarle Corporation.
It is the responsibility of the user to comply with all applicable laws and regulations and to provide for a safe workplace. The user should consider any health or
safety hazards or information contained herein only as a guide, and should take those precautions which are necessary or prudent to instruct employees and to develop
work practice procedures in order to promote a safe work environment. Further, nothing contained herein shall be taken as an inducement or recommendation to
manufacture or use any of the herein materials or processes in violation of existing or future patents.
SC-7004 9/99 Printed in USA © 1999 Albemarle Corporation
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SM
ETHACURE ®
300 Curative
A Convenient Liquid
For All Urethane Applications
®
ALBEMARLE
C O R P O R A T I O N

No Dust.
No Melting.
ETHACURE ®
300 curative
is a liquid urethane curative,
so there’s never any need
for melting, even in cold climates.
Because it’s a liquid,
there’s never any hazardous dust
to be concerned about.
And it works with virtually any
commercially available prepolymer,
including both polyether
and polyester systems.
The Curative That Puts You In Control
• Mix and match prepolymers to fit your needs
• Adjust reaction times as required
• Eliminate dust exposure
• Eliminate melting
• Reduce costly, inconvenient heating
• Simplify handling and blending
• Reduce exposure to hazardous materials
ETHACURE ®
300 Applications
Cast Elastomers
Hot-Cast Process To Produce:
• Rollers used in paper and steel mills
• Small wheels used for skates and casters
• Large wheels used for off-road equipment
• Abrasion-resistant mining equipment
Cold-Cast Process To Produce:
• Prototype tools and parts
• Molds for short production runs
Coatings
Sprays
• Architectural coatings for concrete or masonry
• Industrial coatings for mines and sewers
Hand-Applied
• Crack-bridging coatings for concrete
• Roofing and water proofing
Reaction Injection Molding
• Large RIM parts
• Structural RIM (SRIM) parts
Specialty Adhesives
• Bonding of dissimilar materials
• Production of non-woven articles

EASY
TO HANDLE
ETHACURE 300 curative is a low-viscosity liquid that is
easy to mix, meter and dispense. You can use it to produce
polymers at temperatures as low as room temperature, a
benefit few other aromatic diamines can claim.
ETHACURE 300 curative does not solidify in machine
process lines if you lose power to heating and circulating
equipment. You can perform machine clean-out at room
temperature, which makes the process faster and safer.
SUPERIOR
TOXICOLOGICAL PROPERTIES
ETHACURE 300 curative is a liquid with relatively
low vapor pressure, so there are no detectable fumes and
no dust exposure. Albemarle's toxicity testing for
ETHACURE 300 curative includes LD50 studies by
the skin and oral route, skin and eye irritation tests,
mutagenicity tests, subchronic studies (14-, 28- and 90-day
repeated oral dose) and carcinogenicity studies.
Acute toxicity testing shows a low degree of acute toxicity,
indicating that protective equipment and good handling
practices will prevent skin and eye effects. Negative
results from the 2-year rodent cancer study indicate
that ETHACURE 300 curative is not likely to exhibit a
mutagenic or carcinogenic risk when handled using our
recommended industrial hygiene practices. (Details of
toxicity testing results are available on request.)
ADJUSTABLE
REACTIVITY
Because ETHACURE 300 curative is a liquid, it offers an
added bonus. You can adjust reactivity by merely changing
processing temperatures.
You can lengthen system pot life by lowering the curative
temperature. Lowering the temperature of the prepolymer
will increase pot life further, but if this is done, demold time
may also lengthen.
Pot life can be shortened by using a typical urethane
catalyst. Tertiary amine catalysts such as diazabicyclooctane
(DABCO) give excellent results.
ETHACURE 300 curative is compatible with
ETHACURE 100 curative, a similar aromatic diamine
with shorter reaction times. This offers yet another way to
control processing. Just blend the two curatives to fit
reaction times to your requirements.
EXCELLENT
PHYSICAL PROPERTIES
You’ll appreciate the balance of physical properties
in polymers cured with ETHACURE 300 curative.
Moisture pickup is reduced. Abrasion resistance, tensile
strength, elongation, tear strength and compression set
are all excellent.
Best of all is the control you’ll gain over your processing
operation. You can fine-tune physical properties by
blending prepolymers. You can adjust reaction time and
demold times, too. And you can do it all with confidence
that you can still meet customer specifications.
A WHOLE NEW RANGE
OF PROCESSING OPTIONS
In contrast to some other amine curatives, ETHACURE
300 curative can be used with virtually all commercially
available cast elastomer prepolymers. This includes both
polyether and polyester systems.
ETHACURE 300 curative may be used advantageously
with both 2,4 and 80/20 (2,4/2,6) TDI prepolymers.
It also can be formulated in a wide variety of coatings,
adhesives and RIM systems.

OUTSTANDING PERFORMANCE
IN CAST ELASTOMERS
ETHACURE 300 curative performs well in many types of
polyurethane systems. In cast elastomers, it provides a good
balance of properties comparable to those obtained with the
old solid curatives you have been using.
Cast Elastomers*
Components
Prepolymer Adiprene** L-100 Adiprene** LF950A
Curative E300 MOCA E300 MOCA
% Theory 95 95 95 95
Processing
Curative Temp, ˚C [˚F] 24 [75] 116 [240] 24 [75] 116 [240]
PP Temp, ˚C [˚F] 94 [200] 100 [212] 66 [150] 66 [150]
Mold Temp, ˚C [˚F] 100 [212] 100 [212] 100 [212] 100 [212]
Pot Life, min. 8 10 5.2 5.5
Demold Time, min. 60 60 30 30
Post Cure, 18 hr, ˚C [˚F] 100 [212] 100 [212] 100 [212] 100 [212]
Polymer Properties
Hardness, Shore A
Tensile St,
89 90 96 96
psi [MPa] 4840 [33.4] 4500 [33.1] 4850 [33.1] 5500 [37.9]
Elongation, %
100% Modulus,
400 450 500 350
psi [MPa]
300% Modulus,
1110 [7.7] 1100 [7.6] 2000 [13.8] 2200 [15.1]
psi [MPa]
Tear Str, Die ‘C’,
2255 [15.6] 2100 [14.5] 2520 [17.4] 4100 [28.3]
pli [KN/m]
Tear Str, D-470,
510 [89.3] 400 [70] 600 [105.1] 500 [87.6]
pli [KN/m] 65 [11.4] 75 [13.1] 140 [24.5] 125 [21.9]
Rebound, %
Compression Set, %
45 45 44 42
22hr @ 158 ˚F 35 27 34 27
* Data furnished by Uniroyal Chemical Company
** Adiprene is a registered trademark of Uniroyal Chemical Company
Unlike other curatives on the market,
ETHACURE 300 curative provides an added benefit
when curing cast elastomer polymers produced from
TDI/PTMEG prepolymers.
Recommended post-cure conditions of 16 hours at 212 °F
should provide very good results, but you can improve
properties further by lengthening post-cure times and
using slightly higher temperatures.
The following example polymers were molded using
ETHACURE 300 curative and Adiprene L-100:
Post Cure: hr / ˚C [˚F] 2 / 100 [212] 18 / 100 [212] 18 / 130 [266]
Hardness, Shore A 88 88 88
Tensile Str, psi [MPa] 4890 [33.7] 7140 [49.2] 8710 [60.1]
Elongation, % 500 410 515
100% Modulus, psi [MPa] 1030 [7.1] 1140 [7.9] 1080 [7.9]
300% Modulus, psi [MPa] 1790 [12.3] 1990 [13.7] 1800 [12.4]
Tear Strength
Die ‘C’, pli [kN/m] 340 [59.5] 370 [64.8] 515 [90.2]
Slpit, pli [kN/m] 81 [14.2] 88 [15.4] 120 [21.0]
Compresion Set, % 34 33 27
Resilience, % 47 45 44
INCREASES ABRASION RESISTANCE
OF CAST ELASTOMERS
Albemarle research shows that ETHACURE 300 curative
provides excellent abrasion resistance, a critical property in
many polyurethane applications.
A study was conducted on an ETHACURE 300
curative/Adiprene L-100 polymer system to determine the
effects of various post-cure conditions and stoichiometric
indices on polymer abrasion. Polymers cured with MOCA
were included in the study for comparison purposes.
Effect of Index on Abrasion Resistance of Cast Elastomers
Stoichiometric Index ETHACURE 300 curative MOCA
(18 hr/100 ˚C) Weight Loss (mg/rev) Weight Loss (mg/rev)
0.85 0.050 0.043
0.95 0.045 0.044
1.05 0.052 0.026
Source: Albemarle study conducted on ETHACURE 300 curative / Adiprene® L-100 polymer system.
Both curatives produced material with excellent abrasion
resistance. In fact, the normal Tabor Abrasion Test
method had to be lengthened from 1,000 revolutions to
5,000 revolutions to obtain any measurable weight loss
on the samples.
Abrasion resistance of samples made with ETHACURE 300
curative proved to be relatively insensitive to post-cure
conditions and stoichiometric indices, demonstrating that
ETHACURE 300 curative offers a wide range of processing
conditions for applications in which abrasion resistance is
an important consideration.
IMPROVES SOLVENT RESISTANCE
OF CAST ELASTOMERS
ETHACURE 300 curative also offers advantages in solvent
resistance, an important consideration with some cast
elastomer polyurethanes. Solvent resistance tests on
polymers produced with Adiprene L-100 and cured with
ETHACURE 300 curative show that polymers cured with
ETHACURE 300 curative perform similarly to MOCAcured
elastomers in various solvents, but demonstrate a
significant advantage in 10% NaOH.
Solvent Resistance
PERCENT VOLUME SWELL
7
6
5
4
3
2
1
0
ASTM Oil #1 ASTM Oil #3 10% NaOH EG
SOLVENT
ETHACURE 300 CURATIVE MOCA

COATINGS
SYSTEMS
ETHACURE 300 curative also provides benefits to coatings
formulators. Unlike old-fashioned solids, ETHACURE 300
curative doesn't require liquefication with solvents when
Polyurethane; Flexible Crack-Bridging Coating*
Side A pbw
Desmodur E 15 (1) 74.5
Methyl hexahydrophthalic anhydride (2) 0.5
Side B
ETHACURE 300 curative 6.0
Mesamoll (3) 2.0
Bevaloid 6420 (4) 0.7
Pigment (5) 3.0
Cab-o-Sil TS 720 (6) 0.2
Barytes (7) 13.1
Mix Ratio; A:B, pbw 3:1
Pot Life, hr 1.5
Properties
Hardness, Shore A; after 1 day 73
Hardness, Shore A; final 80
Film Surface after 1 day tack-free
Tensile Str @ 25 ˚C, N/mm2 18.0
Elongation @ 25 ˚C, % 540
Tear Str @ 25 ˚C, N/mm 40.0
Tensile Str @ -20 ˚C, N/mm2 19.1
Elongation @ -20 ˚C, % 67.0
Tear Str @ -20 ˚C, N/mm 33.1
* Data furnished by Bayer AG, coatings and special raw materials business group.
Component /Suppliers
(1) Bayer AG, Leverkusen, Germany
(2) Huls AG, Marl, Germany
(3) Bayer AG, Leverkusen, Germany
(4) C. H. Erbsloh, Krefeld, Germany
(5) E. G. Bayferrox from Bayer AG, Leverkusen, Germany
(6) Cabot GmBH, Hanau, Germany
(7) EWO or Fleur from Deutche Baryl Industrie, Bad Lauterberg, Germany
making liquid coatings formulations. You can produce
100% solids formulations without added effort, and without
hazardous solvent fumes.
Sprayable Polyurea Coatings*
1 (% by Wt.) 2 (% by Wt.)
Side A
Rubinate** 9009 (MDI) 100 100
Side B
Jeffamine** T-5000 37.5 39
Jeffamine** D-2000 25 26
ETHACURE*** 300 curative 37.5 17.5
ETHACURE*** 100 curative – 17.5
A:B Mix Ratio (by volume) 1.0:1.0 1.0:1.0
Polymer Properties
Gel-time, sec. 23 3.5
Tack-free-time, sec. 130 4
Hardness, Shore D 63 57
Tensile Str, psi 2020 2100
Elongation, % 105 120
M-100%, psi 2021 1975
Die ‘C’ Tear, pli 480 456
Flex. Modulus, Mpsi 51.9 49.1
* All data furnished by Huntsman Chemical
** Rubinate and Jeffamine are registered trademarks of Huntsman Chemical
*** ETHACURE is a registered trademark of Albemarle Corporation
CUSTOMIZE YOUR
REACTION INJECTION MOLDING SYSTEM
ETHACURE 300 curative reacts more slowly with
isocyanurates than MOCA. This gives you more time to
fill molds, provides more time for fibers to wet in structural
RIM preforms, and allows you to mold larger RIM parts.
As the following table shows, you can customize
processing time to fit your requirements by blending with
ETHACURE 100 curative.
Polyurea RIM Systems
Side A
Mondur PF (1)
phpB
Side B 1 2 3
Jeffamine T-5000 (2) 75 65 79.1
ETHACURE 300 curative 25 17.5 –
ETHACURE 100 curative – 17.5 20.5
(DETDA)
Processing
Isocyanate Index 1.05 1.05 1.05
Temperature, Side A, ˚C [˚F] 60 [140] 49 [120] 60 [140]
Temperature, Side B, C [˚F] 54 [130] 49 [120] 54 [130]
Mold Temperature, ˚C [˚F] 76 [170] 57 [135] 76 [170]
Gel Time, sec. 21.4 3.6 0.92
Demold Time, sec. 190 60 30
Post Cure, hr / ˚C [˚F] 1 / 121 [250] 1 / 121 [250] 1 / 121 [250]
Polymer Properties
Spec. Gravity, gm/cc 1.12 1.11 1.11
Hardness, Shore D 64 72 64
Flexural Mod, M psi [MPa] 54 [373] 89.8 [620] 54 [373]
Tensile Str, psi [MPa] 3512 [24.2 ] 4445 [30.7] 4553 [31.4]
Elongation, % 223 120 253
(1) MDI q-prepolymer from Bayer
(2) Polypropylene oxide triamine from Huntsman Chemical

JUST
POUR
IN
ETHACURE
300
CURATIVE
ETHACURE 300 curative is a liquid.
So it’s much more convenient than hard-to-handle solid urethane curatives.
You can use it with virtually any commercially available prepolymer,
often at much lower temperatures than you’re using now.
And that gives you a whole new range of processing options.
Polymers cured with ETHACURE 300 curative show an excellent balance
of physical properties, too. Abrasion resistance is less sensitive to
post-cure conditions and stoichiometric indices. And ETHACURE curative blends
may let you decrease demold time and increase your productivity.
Once you pour in ETHACURE 300 curative, you’ll never
go back to “the hard stuff.”
®
ALBEMARLE
C O R P O R A T I O N
ETHACURE 300 is a liquid with
relatively low vapor pressure, so
there is no dust exposure and no
detectable fumes.
Albemarle's toxicity testing for
ETHACURE 300 includes LD50
studies by the skin and oral route, skin
and eye irritation tests, mutagenicity
tests, subchronic studies (14, 28 and
90 day repeated oral dose) and
carcinogenicity studies.
Acute toxicity testing shows a low
degree of acute toxicity, indicating
that protective equipment and good
ETHACURE ®
Curatives
Superior Toxicological Properties
handling practices will prevent skin
and eye effects.
Negative results from the 2-year
rodent cancer study indicate that
ETHACURE 300 curative is not
likely to exhibit a mutagenic or
carcinogenic risk when handled using
our recommended industrial hygiene
practices. (Details of toxicity testing
results are available upon request).
Potential exposure data indicates
that ETHACURE 300 curative is less
likely to cause an exposure than
MBOCA, MDA or TDA.
Condition Sample Application
Type
Concentration Not Detectable Under All Conditions Studied (