SHD COMPOSITE MATERIALS INC
203 McKenzie Road
Mooresville
NC 28117
www.shdcomposites.com
Tel: +1 (704) 6266876
us-sales@shdcomposites.com
SHDUS/MISC/945 Issue: 1 21st June 2022
Revised: 23
rd
January 2018 Uncontrolled copy when printed
LTC250-2XL
Epoxy Component Prepreg
Introduction
LTC250-2XL Prepreg is designed to cure at low temperatures whilst giving you increased outlife over other
low-cure systems and great flexibility in component manufacture. It is a toughened epoxy resin system that
can be supplied on a variety of fabrics to meet your cost and manufacturing requirements.
Typical applications: General purpose Visual
Key Features & Benefits
Cure temperature from 120 F to 170 F
Service temperature up to 260 F after post cure
Low CTE and shrinkage
Work life at 70 F: 5 days
Storage life at 0 F: 12 months
Very low VOC content no added solvents during manufacture
Storage & Out Life
This material should be kept frozen at 0 F. It must be kept sealed in a polythene bag which must not be
opened until fully thawed to room temperature. If the material is not fully used, then the material must be
resealed in the polythene bag to prevent moisture absorption.
SHD COMPOSITE MATERIALS INC
203 McKenzie Road
Mooresville
NC 28117
www.shdcomposites.com
Tel: +1 (704) 6266876
us-sales@shdcomposites.com
SHDUS/MISC/945 Issue: 1 21st June 2022
Revised: 23
rd
January 2018 Uncontrolled copy when printed
Cure Cycles & performances
Recommended Initial cure: 140 F for 14h, at a ramp rate of 2 F/min
Recommended Post cure: 250 F for 1h, at a ramp rate of 2 F/min
Cure Initial Min Cure Tg
120 F (minimum) 40 hours 130 F
140 F 14 hours 150 F
150 F 8 hours 160 F
170 F (maximum) 4 hours 175 F
250 F Post cure 1 hours 265 F
Curing Schedule is meant to be a guide only and is subject to local conditions.
To avoid exotherm particular care must be taken with thick laminates.
Ramp rates must not exceed 5 F per minute during initial cure.
Ramp rates must not exceed 1 F per minute during post cure (free standing).
Volatile content < 1.0% Fibre volume fraction 50 to 60% Voidage (autoclave cure) < 1.0% Cured Material Properties Test Results Standard DMA Tg Storage Modulus Onset 266 F ASTM D7028 Tg Tan Peak 291 F Data obtained after a 250 F, 1h post cure. SHD COMPOSITE MATERIALS INC 203 McKenzie Road Mooresville NC 28117 www.shdcomposites.com Tel: +1 (704) 6266876 us-sales@shdcomposites.com SHDUS/MISC/945 Issue: 1 21st June 2022 Revised: 23 rd January 2018 Uncontrolled copy when printed Viscosity Profile Health and Safety This material contains epoxy resin which can cause allergic reactions with skin contact and must avoid repeated and prolonged skin contact. Please refer to the product Safety Data Sheet before using this material. The following precautions must be taken when using epoxy resin prepregs: Overalls must be worn. Impervious gloves must be worn. Curing schedule is meant to be as a guide only and is subject to local conditions. To avoid exotherm, particular care must be taken with thick laminates. Ramp rates must not exceed 5 F/min during initial cure and 1 F/min during post cure. Disclaimer: Technical advice, instruction, data or recommendation, whether verbal or in writing, is given in good faith. The SHD company providing any such advice gives no warranty or guarantee, whether express or implied, in relation to such advice. Customers must carry out their own tests and assessments as necessary in order to determine the quality and suitability of the product for their particular application and circumstances. Such testing should be performed under conditions identical to those to which the final component/product may be subjected. Values listed in any SHD document are for typical properties of the product or substance in question and are not intended to be used in establishing either statistical specifications nor engineering basis values. They do not constitute either minimum or maximum values for the product or substance in question. 1 10 100 1000 10000 100000 1000000 10000000 20 40 60 80 100 120 140 Pa.s C LTC250-2XLViscosity Profile