Solvay LTM® 123 Cyanate Ester for Prepregs

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Solvay LTM® 123 Cyanate Ester for Prepregs
Categories:	Polymer; Thermoset; Polyester, TS
Material Notes:	LTM123 is a low temperature curing, toughened cyanate ester component prepreg developed for structural applications requiring ultimate dimensional stability in a space environment. Its low moisture absorption and low electrical permittivity characteristics also make it suitable for radomes and radar absorbing structures. LTM123 is also suitable for high service temperature structural applications in the motorsport market. LTM123 can be processed using autoclave and oven vacuum bag methods to produce low voidage composites and can be molded off a range of low cost tooling with few constraints on structure dimensions. For space applications, LTM123 can develop a Tg of 140LC (248°F) after a minimum initial cure at 80°C (176°F) and a free-standing post-cure of 120°C (248°F). For motorsport applications, LTM123 can develop a Tg of 250°C (482°F) after a minimum initial cure at 80°C (176°F) and free-standing post-cure of 240°C (464°F). Features & Benefits: 3 days tack life at 21°C (70°F) 6 months storage at -18°C (0°F) 70°C (158°F) initial cure Autoclave cure Good dimensional stability and thermal durability up to 250°C (482°F) after post-cure Maximum Tg of 330°C (626°F); can withstand thermal spikes to 330°C (626°F) Inherently flame retardant, with low toxic gas and smoke generation Good dielectric properties for radar transparency Information provided by Cytec, subsequently acquired by Solvay.
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Physical Properties	Original Value	Comments

Density	1.19 g/cc	Cured Resin
Moisture Absorption at Equilibrium	0.22 %	0 to 60% RH, 60°C, 1.5mm 0°±60°C M55J
	0.75 %	50%RH at 23°C
Viscosity	14 cP @Temperature 80.0 °C
	154 cP @Temperature 60.0 °C
	91780 cP @Temperature 30.0 °C
Linear Mold Shrinkage	0.00020 cm/cm	After 200°C post-cure 0/90° 60%Vf
Storage Temperature	-18.0 °C

Electrical Properties	Original Value	Comments
Dielectric Constant	2.77 @Frequency 1.00e+10 - 1.40e+10 Hz

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	250 °C	thermal durability
	330 °C	thermal spikes
Glass Transition Temp, Tg	90.0 °C	16 hrs 80°C (Aerospace)
	140 °C	2 hrs 135°C (Motorsport)
	210 °C	8 hrs 200°C (Aerospace)
	250 °C	2 hrs 240°C (Motorsport)

Processing Properties	Original Value	Comments
Cure Time	3.00 hour @Temperature 120 °C	Aerospace Post-cure for Tg=140°C
	4.00 hour @Temperature 150 °C	Aerospace Post-cure for Tg=170°C
	4.00 hour @Temperature 100 °C	Aerospace Post-cure for Tg=120°C
	2.00 hour @Pressure 0.621 MPa, Temperature 135 °C	Recommended, Automotive
	16.0 hour @Pressure 0.621 MPa, Temperature 80.0 °C	Recommended, Aerospace
Shelf Life	6.00 Month @Temperature -18.0 °C

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PCYTED178 / 180480

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