Crestapol 1250LV Brochure - English - Scott Bader

Crestapol ®
1250LV Resin
Properties and
Information
Crestapol 1250LV is a low viscosity urethane acrylate type
resin which is suitable for infusion, Rapid Transfer Moulding
(RTM) and similar processes at room temperature, and can
be infused at vacuum levels down to -1.0 Bar.
KEY FEATURES OF CRESTAPOL 1250LV
n
Excellent mechanical performance and
durability using only moderate temperature
post-curing cycles
n High temperature performance -
Tg 115-120 o C / HDT 109 o C
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Compatible with carbon fibre reinforcement
materials and general purpose sizing agents
Excellent surface finish with minimal
fibre print through
Ability to vary cycle time eliminates the
need to stock different resin grades
Typical Post-Cure Cycles for Crestapol 1250LV
110
HDT - Effect of Post-Cure on HDT for Crestapol 1250LV
107. 7.1
109
120
100
120 o C post cure for 3 hours
HDT ( o C)
100
90
80
70
60
50
40
61 .7
24 Hours
at Room
Temperature
(RT)
67.8
24 Hrs RT
+8 Hrs at
40°C
70.3
24 Hrs RT
+16 Hrs
at 40°C
72.4
24 Hrs RT
+ 24 Hrs
at 40°C
84.5
24 Hrs RT
+ 7 Hrs
at 60°C
24 Hrs RT
+ 3 Hrs
at 80°C
24 Hrs RT
+ 5 Hrs
at 80°C
+ 3 Hrs
at 120°C
80
60
40
80 o C post cure for 3 to 5 hours
40 o C post cure for 16 hours
30
20
10
The HDT of Crestapol 1250LV is dependent on post-cure conditions.
The data shows the effect of post-cure conditions on HDT of
Crestapol 1250LV cured with 2% Trigonox 239 & 2% Accelerator G.
20
18 o C to 25 o C processing
0
0

MIX RATIOS AND PROCESSING
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The recommended cure system for Crestapol ® 1250LV is
Trigonox 239 with Accelerator G.
The cure speed of Crestapol 1250LV can be adjusted using
the additions shown in the table to the right. Also shown are
minimum times which should be observed before
removing parts or components from tooling.
Processing temperatures of between 18°C and 25°C are
recommended.
Post-cures of either 40°C for 16 hours, 80°C for 3 hours, or
80°C for 5 hours + 120°C for 3 hours are recommended
to achieve maximum properties.
Mixing Ratios and Cure Speed Options for Crestapol 1250LV
System
speed
Additions 2% Trigonox 239
2% Accelerator G
Typical
properties
Gel time
at 25°C
De-mould
time ✛
Standard Slow Fast
30~35
minutes
5~8
hours
2% Trigonox 239
2% Accelerator G
0.025% Promotor C
Gel time
at 25°C
60~90
minutes
De-mould
time ✛ >12
hours
2% Trigonox 239
2% Accelerator G
1% Accelerator VN-2
Gel time
at 25°C
De-mould
time ✛
20~25
minutes
3 hours
Typical Liquid Resin Properties of Crestapol 1250LV
Density (25°C) 1.041 g/cm 2
Viscosity (ICI cone & plate, 25°C)
Gel time (100g, 25°C)
2.2 poise
35 minutes
Typical Case Resin Properties of Crestapol 1250LV
24 Hrs RT, 5 Hrs 80°C & 3 Hrs 120°C post-cure
Barcol Hardness 38
Heat Deflection Temperature (HDT) 109
Glass Transition Temperature (Tg)
Ultimate Tensile Strength
115~120°C
76 MPa
Elongation at Break 3.2%
Tensile Modulus
3.28 GPa
Effect of Post-Cure on Volumetric Shrinkage for Crestapol 1250LV
Post-cure conditions Volumetric shrinkage (%)
24 Hours at Room Temperature (RT) 8.5
24 Hrs RT + 16 Hrs at 40°C 8.3
24 Hrs RT + 5 Hrs at 80°C + 3 Hrs at 120°C 8.1
Mechanical Properties of Vacuum Infused Carbon Fibre
Laminates with Crestapol 1250LV ‡
Test method
ILSS Strength ✧ (MPa)
0/90° Bi-axial Specimen
UD Specimen
23°C
Ambient
34
61
Post-conditioned
strength
retention
81%
93%
Flexural Strength* (MPa)
0/90° Bi-axial Specimen 1032 82%
0° Compression Strength # (MPa)
UD Specimen
692 83%
Mechanical performance
The above table presents a selection of typical mechanical test data obtained
using Crestapol 1250LV and carbon fibre reinforcement fabrics utilising general
purpose sized fibres. Also given are indications of strength retention after a
total of 28 days exposure to 4 cycles of 50°C salt spray, -20°C freeze, +60°C dry
conditions.
Please contact Scott Bader Technical Service for further information.
✛ Time required for 1mm laminate to reach Shore-D hardness of 80
✧ BS EN ISO 14130
* BS EN ISO 14125
# BS EN ISO 14126
‡ Room temperature process & 24 Hours room temperature + 3 Hours 80°C post cure
All data shown is correct at time of printing.
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email: composites@scottbader.com CRESTAPOL 1250LV/7/13 ISSUE 3