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CR 3400 - In-Mould Epoxy Gelcoat / Surfacing System (v11)

CR 3400 - In-Mould Epoxy Gelcoat / Surfacing System (v11)
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CR 3400 - In-Mould Epoxy Gelcoat / Surfacing System (v11) - 1

CR 3400 In-Mould Epoxy Gelcoat / Surfacing System n Easy to sand n May also be used with some Gurit prepregs Introduction CR 3400 is an in-mould epoxy surfacing system for epoxy laminates, and is designed to be used as the base for the subsequent application of a paint scheme. CR 3400 is therefore formulated to be easily sandable so that once released, the CR 3400 surface can be readily keyed prior to the application of the paint system. This feature gives additional benefits in that any minor surface defects caused by laminate print-through or mould imperfections can easily be sanded away. CR 3400 is applied into a mould in the same way as other epoxy gelcoats, and has similar handling characteristics. However, the product has a considerably longer overcoating window than other gelcoats - up to one day with Standard hardener at 20°C. This means that the system can also be used in a very flexible manufacturing environment. CR 3400 is designed to be backed up with Ampreg 22 and Ampreg 26 epoxy laminating systems. Under certain conditions it may also be used in conjunction with SP SE70, SE84 prepregs, ST70 and ST 95 SPRINT® systems. CR3400 must be painted prior to water immersion. PDS-CR3400-11-0313 1

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CR 3400 - In-Mould Epoxy Gelcoat / Surfacing System (v11) - 2

Instructions for Use Mixing & Handling CR 3400 resin is mixed with the CR 3400 hardener in the following ratio:CR 3400 Resin 100 : CR 3400 Hardener 30 (by weight) Accurate measurement and thorough mixing are essential when using this system and any deviation from the prescribed mixing ratios will seriously degrade the physical and mechanical properties of the cured system. The resin and hardener must be well stirred for a minute or more, with particular attention being paid to the sides and bottom of the container. As soon as the material is mixed the reaction begins. This reaction produces...

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CR 3400 - In-Mould Epoxy Gelcoat / Surfacing System (v11) - 3

Notes: For an explanation of test methods used see 'Formulated Products Technical Characteristics' All figures quoted are indicative of the properties of the product concerned. Some batch to batch variation may occur tAII times are measured from when resin and hardener are first mixed together

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CR 3400 - In-Mould Epoxy Gelcoat / Surfacing System (v11) - 4

Properties (cont'd) Tack-off Timet Notes: For an explanation of test methods used see 'Formulated Products Technical Characteristics'. All figures quoted are indicative of the properties of the product concerned. Some batch to batch variation may occur. fAII times are measured from when resin and hardener are first mixed together.

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CR 3400 - In-Mould Epoxy Gelcoat / Surfacing System (v11) - 5

Properties (cont'd) Glass Transition Temperature PeakTan ■Ultimate PeakTan Notes: For an explanation of test methods used see 'Formulated Products Technical Characteristics'. All figures quoted are indicative of the properties of the product concerned. Some batch to batch variation may occur. fAII times are measured from when resin and hardener are first mixed together. The following points must be considered 1. Skin contact must be avoided by wearing protective gloves. Gurit recommends the use of disposable nitrile gloves for most applications. The use of barrier creams is not recommended,...

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CR 3400 - In-Mould Epoxy Gelcoat / Surfacing System (v11) - 6

Transport & Storage The CR 3400 resin and hardener should be kept in securely closed containers during transport and storage. Any accidental spillage should be soaked up with sand, sawdust, cotton waste or any other absorbent material. The area should then be washed clean (see appropriate Safety Data Sheet). Adequate long term storage conditions for both materials will result in a shelf life of six months for the resin and two years for the hardener. Storage should be in a warm dry place out of direct sunlight and protected from frost. The temperature should be between 10°C and 25°C....

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