Solvay CYCOM® 5250-4 BMI Prepreg Neat Resin

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Solvay CYCOM® 5250-4 BMI Prepreg Neat Resin
Categories:	Polymer; Thermoset; Bismaleimide (BMI)
Material Notes:	CYCOM® 5250-4 is a 350°F to 400°F (177°C to 204°C) curing bismaleimide resin with a service temperature range of -75°F to 400°F (-59°C to 204°C). CYCOM 5250-4 is specifically formulated for use in primary aircraft structures. In addition, a variety of secondary structural components can take advantage of the increased performance from using high-strain carbon fibers and the improved damage-resistance this system provides. CYCOM 5250-4 is available with either carbon fiber or glass fiber reinforcement in unidirectional tape, woven broadgood and roving forms. Features & Benefits: Short-term service temperature up to 450°F (232°C) Superior hot/wet properties at 220°F to 375°F (104°C to 190°C) Excellent toughness Void-free laminates High temperature resistance Low thermal conductivity Versatile cure Excellent compression strength properties after impact Shop life greater than 28 days at room temperature Fluid/solvent resistant Suggested Applications: Primary and secondary aircraft structure including: Engine nacelles Fuselage skins and stiffeners Wing and stabilizer spars and skins Other critical load-bearing components Information provided by Cytec, subsequently acquired by Solvay.
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Physical Properties	Metric	English	Comments

Density	1.25 g/cc	0.0452 lb/in³	Neat Resin; QC-PT-55
Volatiles	2.0 %	2.0 %
Water Absorption	4.2 % @Temperature 71.0 °C, Time 3.60e+6 sec	4.2 % @Temperature 160 °F, Time 1000 hour

Mechanical Properties	Metric	English	Comments
Tensile Strength	103 MPa	14900 psi	ASTM D3039
Elongation at Break	4.8 %	4.8 %	ASTM D3039
Tensile Modulus	4.60 GPa	667 ksi	ASTM D3039
Flexural Strength	163 MPa	23600 psi	ASTM D790
Flexural Strain at Break	4.5 %	4.5 %	ASTM D790
Fracture Toughness	0.850 MPa-m½	0.774 ksi-in½	K_IC Notch Sensitivity; Cytec Test
Charpy Impact Unnotched	1.70 J/cm²	8.10 ft-lb/in²

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	204 °C	400 °F	Continuous; depends on cure cycle
	232 °C	450 °F	short term; depends on cure cycle
Minimum Service Temperature, Air	-59.4 °C	-75.0 °F
Glass Transition Temp, Tg	200 °C	392 °F	Wet; QC-PT-22
	216 °C	421 °F	Post Cure: 177°C for 6 hrs
	249 °C	480 °F	Post Cure: 190°C for 6 hrs
	263 °C	505 °F	Post Cure: 210°C for 6 hrs
	282 °C	540 °F	Post Cure: 227°C for 6 hrs
	300 °C	572 °F	Dry; QC-PT-22
	304 °C	579 °F	Post Cure: 243°C for 6 hrs

Processing Properties	Metric	English	Comments
Processing Temperature	177 - 204 °C	350 - 400 °F	Cure Temperature - Autoclave
Gel Time	65.0 min @Temperature 177 °C	65.0 min @Temperature 351 °F	in nitrogen atmosphere; QC-TP-87
Shelf Life	>= 1.00 Month @Temperature 72.0 °C	>= 1.00 Month @Temperature 162 °F
	>= 3.00 Month @Temperature 4.44 °C	>= 3.00 Month @Temperature 40.0 °F
	>= 12.0 Month @Temperature -17.8 °C	>= 12.0 Month @Temperature 0.000 °F

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PCYTED133 / 180435

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