Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Features and Benefits
Crystic 785PA has a lower styrene content than conventional RTM resins. Its use can significantly reduce the occurrence of print through, to produce moldings with an enhanced surface finish.
Applications & Uses
- Applications
- Composites Processing Methods
- Recommended Applications
Crystic 785PA was developed primarily as an RTM resin, but its properties make it suitable for use in other similar closed molding techniques. Crystic 785PA is recommended for the manufacture of moldings for land transport and general industrial applications. Where longer gel times are required, Crystic 785PALR should be used.
- Formulation Guidelines
Crystic 785PA must be thoroughly stirred and allowed to attain workshop temperature (18YC - 20°C) before use. It needs only the addition of a catalyst to start the curing reaction. The recommended catalyst is Trigonox 44B which should be added at 1% to 2% into the resin. For Crystic 785PA LR the recommended catalyst is Butanox M50.
Properties
- Color
- Typical Liquid Resin Properties
- Laminate properties
- Resin Properties - Filled Casting (Cured)
- Note
* Curing Schedule—24hrs at 20°C, 3 hrs at 80°C
†Curing Schedule —24 hrs at 20°C, 5 hrs at 80°C, 3 hrs at 120°C
** Laminate made with 1 layer Rovicore 450 D3 450 Curing Schedule - 24 hrs at 20°C, 16 hrs at 40°C
| Value | Units | Test Method / Conditions | |
| Viscosity (at 25°C) | 2.2 | Poise | SB, BS EN or BS EN ISO test method |
| Specific Gravity (at 25°C) | 1.1 | — | SB, BS EN or BS EN ISO test method |
| Volatile Content | 34 | % | SB, BS EN or BS EN ISO test method |
| Stability (at 25°C) | 3 | Months | SB, BS EN or BS EN ISO test method |
| Gel Time (at 20°C, using 2% Trigonox 44B) | 16.5 | Minutes | SB, BS EN or BS EN ISO test method |
| Value | Units | Test Method / Conditions | |
| Glass Content | 23.1 | % | SB, BS EN or BS EN ISO test method |
| Tensile Strength | 72.5 | MPa | SB, BS EN or BS EN ISO test method |
| Tensile Modulus | 4600 | MPa | SB, BS EN or BS EN ISO test method |
| Elongation (at break) | 1.9 | % | SB, BS EN or BS EN ISO test method |
| Flexural Strength | 231 | MPa | SB, BS EN or BS EN ISO test method |
| Flexural Modulus | 7100 | MPa | SB, BS EN or BS EN ISO test method |
| Value | Units | Test Method / Conditions | |
| Barcol Hardness (Model GYZ 934-1)* | 40 | — | SB, BS EN or BS EN ISO test method |
| Deflection Temperature (under load 1.80 MPa) †* | 56 | ºC | SB, BS EN or BS EN ISO test method |
| Water Absorption (24h, at 23°C)* | 23 | mg | SB, BS EN or BS EN ISO test method |
| Tensile Strength* | 49 | MPa | SB, BS EN or BS EN ISO test method |
| Tensile Modulus* | 2900 | MPa | SB, BS EN or BS EN ISO test method |
| Elongation (at break)* | 1.82 | % | SB, BS EN or BS EN ISO test method |
Technical Details & Test Data
- Additives
Crystic 785PA can be supplied in a range of colors. This eliminates the potential for mixing errors with small quanities of pigment paste. The addition of any pigment, extra 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.
Packaging & Availability
- Packaging Type
- Packaging
- Crystic® 785PA and Crystic® 785PALR are supplied in 225kg steel containers.
Storage & Handling
- Storage
- Crystic® 785PA and Crystic® 785PALR 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 Crystic 785PA Crystic 785PALR 1.0% 44B 1.5% 44B 2.0% 44B 1.0% 44B 1.5% 44B 2.0% 44B 15°C 37 28 24 150 86 63 20°C 22 17 14 107 61 46 25°C 15 12 10 66 39 30 The resin, mold and workshop should all be at, or above, 15°C before curing is carried out.