I have been gathering information on high temperature epoxies for my
carbon fiber intake manifold project. I think the two best candidates are
EZ-Lam HT http://www.acp-composites.com/acp-ez.htm
and Aremco-Bond 526N Epoxy http://www.graphitestore.com/items_list.asp/action/prod/prd_id/49/cat_id/4
. I would appreciate input in selecting the best epoxy for the carbon fiber
manifold. The max operating temp of the EZ-lam HT is 450 F and the 526N is 600
F. While temp is important it is not the only factor, cost is also a factor. All
material costs will be pasted onto the customer J
EZ-lam HT
Quart $50
Gallon $185
Aremco-Bond 526N Epoxy
Pint $90
Quart $160
Gallon $275
The pricing on the 526N Epoxy is not very linear. If someone can find a
cheaper source of smaller quantities it would be nice. I have been unsuccessful.
Hear are the spec sheets for each:
EZ-Lam HT
DESCRIPTION:
An ultra high temperature laminating system for the construction of laminated
composite parts. E-Z LAM HT has excellent wet-out characteristics, facilitating
lay-ups involving compound contours. Its long pot life allows for ease of
vacuum bagging . The maximum operating temperature for
laminated parts manufactured from E-Z LAM HT is 450 Deg. F.
MIX RATIO: 100 parts by weight E-Z LAM HT A
33 parts by weight E-Z LAM HT
POT LIFE: 150 gr. mass 4 HRS. @ 75 F
CURE: ROOM TEMP SET
FOLLOWED BY
2 HRS. @ 150 F
2 HRS. @ 200 F
2 HRS. @ 250 F
2 HRS. @ 300 F
2 HRS. @ 350 F
ALLOW TO COOL IN OVEN
PROPERTIES: VISCOSITY, MIXED 5000 CPS
DUROMETER D 94 SHORE
SPECIFIC GRAVITY 1.19 gm/cc
USE TEMP, 400 F
FLEXURAL 102,000 PSI
COMPRESSION 64,000 PSI
TENSILE 57,000 PSI
SHELF LIFE: Twelve months when stored in tightly sealed containers at room
temperature.
Aremco-Bond 526N
Ultra high temperature two-part
(1:1) epoxy for specialty bonding and potting applications to 600 F. Can be
applied to a myriad of substrates, offering exceptional chemical, electrical
and mechanical properties. On the picture Aremco-Bond 526N seals
connection in down-hole motor assembly.
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Manufacturer:
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Aremco Products, Inc.
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Description:
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PROPERTY
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US VALUE
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METRIC VALUE
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Mix Ratio by Weight
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1:1
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resin:hardener
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Specific Gravity
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1.23
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gms/cc
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Mixed Viscosity
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8,500
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@ 25°C,
cps
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Pot Life
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2.5
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100gm @
25°C, hours
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Recommended Cure
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2/200 + 2/325
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hours/°F
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hours/°C
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Alternate Cure
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3-4/300
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hours/°F
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hours/°C
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Temperature Resistance
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-76/572
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°F
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-60/300
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°C
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CTE
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18
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in/in °F
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Microns/m
°C
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Tensile Strength
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2800
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psi
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19.3
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mpa
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Flexural Strength
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18000
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psi
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124.1
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mpa
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Volume Resistivity
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4.0 x 10 14
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ohm-cm @
RT
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Dielectric Strength
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450
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volts/mil
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Dielectric Constant
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3.01
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1.0 kHz
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Chemical Resistance
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Good
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Color
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Amber
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I am leaning towards using the EZ-LAM HT
because of its lower cost and it is designed for laminating. However, it would
be nice to have the 600F of the 526N. That said, the engine should not get much
over 210 F and the manifold can be shielded from high temperature exhaust and turbo.
Alex Madsen