Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Features and Benefits
The viscosity characteristics of Crystic 781PALV allow the addition of up to 40 parts per hundred of filler, with no adverse effect on flow properties. This means that the filled resin mix can be easily injected into the RTM mold. In RTM Light applications the viscosity characteristics of Crystic 781PALV ensure excellent flow through the mold. Crystic 781PALV has good mechanical properties and impact resistance.
Applications & Uses
- Composites Processing Methods
- Recommended Applications
Crystic 781PALV is especially suited to those Resin Transfer Molding applications which require the addition of filler to the resin system. In RTM Light applications Crystic 781PALV is recommended to be used un-filled.
- Formulation Guidelines
Crystic 781PALV should be allowed to attain workshop temperature (18°C — 20°C) before use. It requires only the addition of a catalyst to start the curing reaction. The recommended catalyst is Trigonox 44B (acetyl acetone peroxide), which should be added at 1-2% into the resin. Trigonox 524, an acetyl acetone peroxide/tert-butyl peroxybenzoate mixture developed specifically to obtain a more efficient cure in RTM, can also be used.
Properties
- Typical Liquid Resin Properties
- Laminate properties
- Resin Properties - Unfilled Casting (Cured)
- Note
* Curing schedule – 24 hours at 20 ºC, 3 hours at 80ºC
† Curing schedule – 24 hours at 20 ºC, 5 hours at 80ºC, 3 hours at 120ºC
** CSM Laminate made with 1 layer Rovicore 600 D3 600 Curing schedule – 24 hours at 20ºC, 16 hours at 40ºC
| Value | Units | Test Method / Conditions | |
| Viscosity (at 25°C) | 1.75 | Poise | BS or BS EN ISO test method |
| Volatile Content | 42 | % | BS or BS EN ISO test method |
| Specific Gravity (at 25°C) | 1.09 | — | BS or BS EN ISO test method |
| Stability (at 20°C) | 3 | Months | BS or BS EN ISO test method |
| Gel Time (at 20°C, using 2% Trigonox 44B) | 8.5 | Minutes | BS or BS EN ISO test method |
| Value | Units | Test Method / Conditions | |
| Glass Content | 28 | % | BS or BS EN ISO test method |
| Tensile Strength | 96 | MPa | BS or BS EN ISO test method |
| Tensile Modulus | 7400 | MPa | BS or BS EN ISO test method |
| Elongation (at break) | 1.6 | % | BS or BS EN ISO test method |
| Flexural Strength | 184 | MPa | BS or BS EN ISO test method |
| Flexural Modulus | 5800 | MPa | BS or BS EN ISO test method |
| Notched Izod Impact Strength | 74 | kJ/m² | BS or BS EN ISO test method |
| Charpy Impact Strength | 70 | kJ/m² | BS or BS EN ISO test method |
| Value | Units | Test Method / Conditions | |
| Barcol Hardness (Model GYZ 934-1)* | 48 | — | BS or BS EN ISO test method |
| Deflection Temperature (under load 1.80 MPa) †* | 78 | ºC | BS or BS EN ISO test method |
| Water Absorption (24h, at 23°C)* | 19 | mg | BS or BS EN ISO test method |
| Tensile Strength* | 72 | MPa | BS or BS EN ISO test method |
| Tensile Modulus* | 3600 | MPa | BS or BS EN ISO test method |
| Elongation (at break)* | 3.1 | % | BS or BS EN ISO test method |
| Specific Gravity (at 20°C)* | 1.2 | — | BS or BS EN ISO test method |
Technical Details & Test Data
- Additives
The addition of pigment pastes, fillers or other additives can adversely affect the Resin Transfer Molding process and the properties of the cured laminate. Users should consult Scott Bader’s Technical Service Department before making any such additions.
- Post Curing
For optimum properties, laminates made using Crystic 781PALV should be post cured before being put into service. The laminate should be allowed to cure for 24 hours at 20°C, and then be oven cured for a minimum of 16 hours at 40°C or 3 hours at 80°C.
Packaging & Availability
- Packaging Type
- Packaging
- Crystic® 781PALV is supplied in 25kg, 200kg and 1 ton containers. Bulk supplies can be delivered by road tanker.
Storage & Handling
- Storage
- Crystic® 781PALV should be stored in the dark in suitable closed containers. It is recommended that the storage temperature should be less than 20°C where practical, but should not exceed 30°C. Ideally, containers should be opened only immediately prior to use.
- Pot Life
Temperature Pot Life in minutes using Trigonox 44B 1.0 1.5 2.0 Pot life in minutes at 20ºC - - 8.5 Pot life in minutes at 25ºC - - 6 Pot life in minutes at 40ºC 5 3.5 2 The resin, mold and workshop should be at, or above 15°C before curing is carried out