Cycom® 5575-2 Modified Cyanate Prepreg System

®
TECHNICAL DATA SHEET
AEROSPACE MATERIALS
Cycom® 5575-2 Modified Cyanate
Prepreg System
DESCRIPTION
The Rigidite® 5575-2 Prepreg System is a 350°F (177°C) curing modified cyanate ester resin. This system has good high
temperature mechanical properties with low dielectric constant and low loss tangent electrical properties.
Typical applications include radomes, antenna structures, (qualified on the F-22) low observable structures, and low
dielectric substrates and loss tangent.
Other products in the cyanate ester family include Metlbond® 2555 and FM X2525 structural film adhesives.
FEATURES & BENEFITS
•
One of a family of compatible products based on second-generation cyanate ester chemistry
•
Low dielectric constant and loss tangent
•
Service temperature up to 350⁰F (177⁰C)
•
Autoclave, vacuum or press curable
•
Excellent hot/wet mechanical performance
•
Low moisture uptake, low out-gassing properties
•
Shelf Life is in excess of six months at 0⁰F (-18⁰C), or three months at 40⁰F (4⁰C) in sealed containers. To prevent
moisture pickup, a sealed container should be opened until the prepreg reaches ambient temperature.
•
Shop life is in excess of 21 days at room temperature
QUARTZ AND GLASS FIBER
Quartz fiber prepreg is available in woven broadgoods, for such use as aircraft structure that require a low dielectric
constant and dielectric loss tangent.
Glass fiber prepreg, in woven broadgoods, is useful for applications requiring a median dielectric constant.
Prepreg form, in woven fabric, is available up to 60 inches (152 cm) wide or slit to your requirements.
www.cytec.com
©2014 Cytec Industries Inc. • ASM-9142-EN Rev. 00• 13 May 2014
CYCOM® 5575-2 MODIFIED CYANATE PREPREG SYSTEM
PROPERTIES
Table 1 | Physical Properties
Tg
No Post-Cure
375°F (190°C)
QC-PT-29
4 hours at 350°F (177°C)
475°F (246°C0
QC-PT-29
2 hours Post-Cure at 440°F (227°C)
500°F (260°C)
QC-PT-25
QC-PT-87
Alternate Post-Cure
2 hours at 480°F (249°C)
Gel Time
At 350°F (177°C), Fischer-John’s
5 – 10 minutes
Moisture Pickup
30 days 95% R.H., 160°F
1.0%
Total Mass Loss (TML)
0.25
Collected Volatile Condensable Materials (CVCM)
.001
Water Vapor Recovered (WVR)
0.30
Out-Gassing
ASTM E595, NASA
Sp-R-0022A
Table 2 | Physical Properties
Resin Content,
% Weight
Volatiles,
Astroquartz II – 503
38
2.0
18
Astroquartz II – 581
33
2.0
11
E-Glass – 1581
32
0.6
16
E-Glass - 7781
39
Fiber
Flow, % Weight
% Weight Maximum
Glass Style
Test Procedure
24
QC-PT-13
Test Temperature °F (°C)
QC-PT-16
QC-PT-17
350°F (177°C)
350°F (177°C)
Test Pressure
100PSI
Table 3 | Electrical Properties
Sample
Frequency
Bandwidth GHz
Temperature
Neat Resin – Rigidite 5575-2
10
75
5575-2 / 7781 Fiberglass, 36% R.C.
10
5575-2 / 581 Astroquartz 36% R.C
10
5575-2 / 581 Astroquartz 36% R.C
Dielectric
Constant
Loss Tangent
(24)
2.8
0.002 – 0.005
75
(24)
4.21
0.007
75
(24)
3.2
0.002 – 0.005
400
(204)
3.2
0.002 – 0.005
°F (°C)
12.4 – 18.0
75
(24)
3.18
--
5575-2 / 581 Astroquartz 36% R.C
18.0 – 26.5
75
(24)
3.26
--
5575-2 / 581 Astroquartz 36% R.C
26.5 – 40.0
75
(24)
3.24
0.0057
5575-2 / 581 Astroquartz 36% R.C
40.0 – 60.0
75
(24)
3.23
0.0051
5575-2 / 581 Astroquartz 36% R.C
75.0 – 110.0
75
(24)
3.26
0.0054
CYCOM® 5575-2 MODIFIED CYANATE PREPREG SYSTEM
Table 4 | Mechanical Properties Glass Fiber
Property
Ksi = (MPa)
Test Temperature
Rigidite 5575-2 / 7781
-67°F (-55°C)
63 (434)
RT
52 (358)
RT/W
49 (338)
250°F (121°C)
46 (317)
250°F / W (121 °C)
42 ( (289)
350°D (177°C)
47 (324)
350°F / W (177°C)
40 (276)
450°F (232°C)
42 (289)
550°F (288°C)
36 (243)
-67°F (-55°C)
3.4 (23.4)
RT
3.3 (22.7)
RT / W
3.2 (22.0)
250° F (121°C)
3.1 (21.4)
250°F / W (121°C)
3.3 (22.7)
350°F (177°C)
3.0 (20.7)
350°F / W (177°C)
3.0 (20.7)
-67°F (-55°C)
70.4 (485)
RT
70.8 (488)
RT / W
48.3 (333)
250° F (121°C)
47.9 (330)
-67°F (-55°C)
3.4 (23.4)
RT
3.0 (20.7)
RT / W
3.0 (20.7)
250° F (121°C)
3.2 (22.0)
-67°F (-55°C)
10.0 (69)
RT
8.1 (56)
RT / W
7.7 (53)
250° F (121°C)
7.0 (48)
250°F / W (121°C)
5.5 (38)
350°F (177°C)
6.9 (48)
350°F / W (177°C)
4.8 (33)
450°F (232°C)
3.9 (27)
Msi = (GPa)
Tensile Strength (ASTM D638)
Ultimate, KsI
Modulus, Msi
Compression Strength (ASTM D695)
Ultimate, Ksi
Modulus, Msi
Short Beam Shear Strength (ASTM D2344)
Wet Conditioning = 72 hour water boil
FV = 55%
CYCOM® 5575-2 MODIFIED CYANATE PREPREG SYSTEM
Table 5| Mechanical Properties Astroquartz
Property
Ksi = (MPa)
Test Temperature
Msi = (GPa)
Rigidite 5575-2 / 581
Astroquartz
Tensile Strength (ASTM D638)
Ultimate, KsI
RTD
101 (696)
Modulus, Msi
RTD
3.8 (26.1)
Ultimate, Ksi
RTD
76 (524)
Modulus, Msi
RTD
3.4 (23.4)
Ultimate, Ksi
RTD
115 (792)
Modulus, Msi
RTD
3.9 (23.4)
RTD
11.7 (81)
Compression Strength (ASTM D695)
Flexural Strength (ASTM D790)
Short Beam Shear Strength (ASTM D234)
Ultimate, Ksi
FV = 55%
Table 6| Mechanical Properties Glass Fiber – Environment and Fluid Resistance
Property
Environmental
Ksi = (MPa)
Preconditioning
Test Temperature
7781
Msi = (GPa)
Tensile Strength (ASTM D638)
Ultimate, KsI
Modulus, Msi
49 (338)
Hydraulic Oil
RT
30 Days Immersion
250°F (121°C)
Room Temperature
350°F (177°C)
47 (323)
45 (310
3.2 (22.0)
3.1 (21.3)
3.0 (20.6)
Tensile Strength (ASTM D638)
Ultimate, KsI
Modulus, Msi
Tensile Strength (ASTM D638)
Ultimate, KsI
Modulus, Msi
Tensile Strength (ASTM D638)
Ultimate, KsI
Modulus, Msi
FV = 55%
Jet Fuel, JP5
30 Days Immersion
Room Temperature
5% Salt Spray
95°F
30 Days Exposure
47 (232.8)
RT
45 (310.0)
250° F (121°C)
3.2 (22.0
3.3 (22.7)
50 (344)
RT
46 (317)
250°F (121°C)
3.1 (21.3)
3.0 (20.7)
46 (316)
Moisture
95% RH, 160°F
RT
41 (282)
1.0 Weight Gain
250°F (121°C)
3.1 (21.3)
30 Days Exposure
2.9 (19.9)
CYCOM® 5575-2 MODIFIED CYANATE PREPREG SYSTEM
Property
Environmental
Ksi = (MPa)
Preconditioning
Test Temperature
7781
RT
67 (461)
Msi = (GPa)
Tensile Strength (ASTM D695)
Ultimate, KsI
Modulus, Msi
Tensile Strength (ASTM D695)
Ultimate, KsI
Modulus, Msi
Tensile Strength (ASTM D695)
Ultimate, KsI
Modulus, Msi
Hydraulic Oil
30 Days Immersion
Jet Fuel, JP5
30 Days Immersion
3.2 (20.6)
RT
68 (468)
3.1 (21.3)
Moisture
95% RH, 160°F
1.0 Weight Gain
30 Days Exposure
RT
60 (413)
2.8 (19.2)
Figure 1 | “No Bleed” Bagging Procedures | Recommended for Rigidite 5575-2 Laminates – Autoclave Cure
1. Edge breather, 1 ply style 1542 glass fabric, or equivalent, 1 inch (2.54 cm) minimum width with connection to
vacuum source. Place a single fiberglass yarn between the edges of the layup and the edge breathers to allow
evacuation of air from the layup. Additional yarns may be required on thicker laminates or parts to provide adequate
removal of trapped air.
2. FEP extends to the center line of edge breather
3. Pressure place 0.20 inch (5.0 mm) minimum.
Cure Cycles
Cytec’s recommended standard autoclave cure cycles for Rigidite 5575-2 composites, up to 0.5 inch (12,7 mm) thickness,
is as follows:
Autoclave Cure, Laminates
•
Initial Pressure – Apply 22 inch Hg (74 KPa) vacuum minimum and 85 psi (580 KPa). Vent vacuum when autoclave
pressure reaches 15 to 2o psi (103 to 138 KPa)
•
Heat Rise – RT to 350 ± 5°F (177 ± 3°C)
•
Dwell – 240 minutes at 350 ± 5°F (177 ± 3°C)
•
Cook Down – Under pressure to <140°F (60°C)
•
Post-Cure – 440°F (227°C) for 120 minutes
Bagging procedure for woven goods are typically “standard edge bleed only”. Surface bleeders may be added when
higher laminate fiber volume is desired.
CYCOM® 5575-2 MODIFIED CYANATE PREPREG SYSTEM
Test Specimen Fabrication
Unidirectional carbon fiber composites fabricated from Rigidite 5575-2 materials are currently generating tensile
strengths up to 300 Ksi (2067 KPa), and modulus values in the 18 to 22 Msi (124 to 151 GPa) range, standard G30-500
modulus.
Precautions
As might be expected, a much greater level of care must be exercised in several areas of specimen fabrication and
mechanical testing in order to achieve the available properties of the test material. Due to the high stresses associated
with tests involving this material, we have identified some of the more critical areas requiring additional precision to
obtain ultimate properties.
•
Very precise 0° fiber alignment in layup
•
Extremely accurate alignment in cutting test specimens relative to 0° fiber orientation
•
Careful matching of tab material thickness on opposite sides of test specimens (especially compression). Avoid tape in
tab bondline thickness.
•
Carefully avoid any minute imperfections (stress concentration points), especially in the edges of the tensile
specimens. Cytec recommends wet grinding all tension and compression specimens to final width and length
dimensions.
•
Parallelism of bonded tab ends (in both planes) is critical in specimens, and the ground ends should be perpendicular
within 0.001 inches (0.025 mm) across both width and thickness dimensions of the specimens.
•
Smooth surfaces on bonded tabs are recommended on compression specimens to prevent fixture binding.
•
Tab Bonding Adhesive – it is necessary to use very high shear strength adhesive for tab bonding. Suitable
recommended adhesives are show as follows:
•
Test Condition
Adhesive
67°F (-55°C)
Metlbond 1113 or Equivalent
RT
Metlbond 1113 or Equivalent
180° F (82°C)
Metlbond 1146 or Equivalent
Wet / 160°F (91°C)
Metlbond 1146 or Equivalent
200° F (93°C)
Metlbond 1146 or Equivalent
Wet / 200°F (93°C)
Metlbond 1146 or Equivalent
Tab Materials – for tensile tab materials, Cytec has found it convenient to purchase an electrical grade epoxy glass
laminate. This material is designated MIL-P-181771, GEE/G 10, 0.060 inch (1.524 mm) thick. The material may be
purchased in 3 inch (7.6 cm) wide x 26 inch (66.0 cm) long strips. However, some recent work strongly indicates that a
±45° fiber orientation to the tab loading axis is quite beneficial in more uniformly loading the tab bond area, thereby
precluding premature tab bond failure. Cytec grinds the taper on tensile tab materials to 15 ± 2°, leaving 0.005 to
0.010 inch (0.127 to 0.254 mm) edge thickness rather than a “feather” edge. NOTE: For elevated temperature testing
at 270°F (132°C) and above, a higher temperature tab material is required, such as NARMCO’s 506.
Testing Tensile Specimens – a very important requirement is that the test machine grips be of sufficient length to grip
the entire tab length up to or beyond the beginning of the taper. This is to avoid a “pinch-off” effect which almost
always causes premature failure. The test specimen must be precisely aligned in the grips and in the direction of the
load.
Compression Tabs – Cytec recommends the use of Rigidite 5575-2 material, all 0° orientation is the longitudinal
direction of the specimen. Use sufficient plies to product a nominal thickness of 0.070 inches (1.778 mm) or 1 ½ times
the thickness of the laminate.
CYCOM® 5575-2 MODIFIED CYANATE PREPREG SYSTEM
Tab Bonding – all tab bonding should be done at relatively low pressure, i.e., 10 to 15 psi (69 to 103 KPa), in order to
maintain suitable glue line thickness. In compression specimens, it is important to keep the 0.188 inches (4.775 mm)
unsupported section as free as possible from adhesive flash. A properly sized strip of cured composites or aluminum
covered with Teflon film can be used effectively for this purpose. It also is desirable to fabricate a simple bonding
fixture to accurately position the tabs on the test laminate, drill positioning holds outside of the bond area and use
sub-surface pins to prevent tab slippage during bonding. Although this is not mandatory, it will greatly assist in
maintaining accurate tab spacing and alignment.
PRODUCT HANDLING AND SAFETY
Cytec Industries Inc. recommends wearing clean, impervious gloves when working with potting compound to reduce skin
contact and to avoid contamination of the product. Materials Safety Data Sheets (MSDS) and product labels are available
upon request and can be obtained from www.cytec.com or any Cytec location supplying aerospace materials.
DISPOSAL OF SCRAP MATERIAL
Disposal of scrap material must be in accordance with local, state, and federal regulations.
CONTACT INFORMATION
Global Product Referral
tel: 1 800 652 6013 – USA
tel: +1 973 357 3193 – Outside the USA
email: [email protected]
DISCLAIMER: The data and information provided in this document have been obtained from carefully controlled samples and are considered
to be representative of the product described. Cytec does not express or imply any guarantee or warranty of any kind including, but not
limited to, the accuracy, the completeness or the relevance of the data and information set out herein. Because the properties of this product
can be significantly affected by the fabrication and testing techniques employed, and since Cytec does not control the conditions under which
its products are tested and used, Cytec cannot guarantee the properties provided will be obtained with other processes and equipment. No
guarantee or warranty is provided the product is adapted for a specific use or purpose. Cytec declines any liability with respect to the use
made by any third party of the data and information contained herein. Cytec has the right to change any data or information when deemed
appropriate.
All trademarks are the property of their respective owners.

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