Crystic® Polyester Resin 491PA
- Chemical Family
- Isophthalics, PolyestersIsophthalicsPolyesters
Crystic® Polyester Resin 491PA is a pre-accelerated, thixotropic, isophthalic polyester resin with good water and chemical resistance properties. It is versatile and suitable for performance boat hulls destined for use in warm or tropical areas. This product is also suitable for the manufacture of chemical plants, tanks, pipes, and chemical containers. It has a 12-minute gel time.
Other characteristics
- Brand
- Crystic
- Functions
Resins, Binders & Matrix Materials, Surface Finish
- Polymer Name
- Thermoset Polyester
- Color (Properties)
- Pink
- Processing Methods
- Hand Lay-up, Spray Lay-up
- Note
* Curing schedule – 24hrs at 20°C, 3 hrs at 80°C † Curing schedule – 24hrs at 20°C, 5hrs at 80°C, 3hrs at 120°C ** C.S.M** Laminate made with 4 layers 450g/m² PB CSM Curing schedule – 24hrs at 20°C, 16hrs at 40°C
- Markets
- Automotive & Transportation
- Industrial
- Additives
Crystic 491PA may be pigmented by the addition of up to 5% of Crystic Pigment Paste. The addition of certain pigments, fillers or extra styrene may adversely affect the food taint, toxicity and chemical resistant properties of laminates so, for critical applications, customers should satisfy themselves that any additions made will give the performance required.
- Approvals
Crystic 491PA is approved by Lloyd's Register of Shipping for use in the construction of craft under their survey. In conjunction with Crystic Gelcoat 65PA, Crystic 491PA is approved under the Water Regulations Advisory Scheme (WRAS) for use in contact with potable water.
- Post Curing
Satisfactory laminates for many applications can be made from Crystic 491 and 491PA by curing at workshop temperature (20°C). For optimum properties and long term performance, however, laminates 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 3 hours at 80°C, or 16 hours at 40°C.. Moldings which are to be used with foodstuffs should be allowed to cure for 24 hours at 20°C and then be over cured for a minimum of 3 hours at 85°C. They should be thoroughly wet – steam cleaned for at least one hour prior to use. If wet steam cleaning is not practical, suitably shaped moldings can be filled with hot water (60°C - 80°C) containing non-perfumed detergent. After 2 hours, they should be emptied and thoroughly rinsed with several batches of clean, hot water. These precautions are essential to avoid the tainting of foodstuffs.
- Technology
- Composite Materials
- Packaging Type
- Drums
- Application Methods
- Brush
- Spray
- Color
- Pink
- Composites End Use
- Liners
- Pipes
- Tanks
- Material Features
- Chemical Resistant
- Thixotropic
- Water Resistant
- Storage Condition
Crystic 491 and 491PA should be stored in the dark in suitable containers. It is recommended that the storage temperature should be less that 20°C where practical, but should not exceed 30. Ideally, containers should be opened only immediately prior to use.
- Country Availability
- India
Technical data
Table 1 of 3
6 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Viscosity (at 25°C, 37.35 s⁻¹) | 6.5 | Poise | BS 2782 |
| Viscosity (at 25°C, 4500 s⁻¹) | 3.3 | Poise | BS 2782 |
| Specific Gravity (at 25°C) | 1.11 | — | BS 2782 |
| Volatile Content | 42 | % | BS 2782 |
| Acid Value | 18 | mg KOH/g | BS 2782 |
| Gel Time (at 25°C, using 2% Catalyst M (or Butanox M50)) | 12 | Minutes | BS 2782 |
Table 2 of 3
6 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Glass Content | 32 | % | BS 2782 |
| Tensile Strength | 121 | MPa | BS 2782 |
| Tensile Modulus | 7600 | MPa | BS 2782 |
| Elongation (at break) | 2.2 | % | BS 2782 |
| Flexural Strength | 218 | MPa | BS 2782 |
| Flexural Modulus | 7200 | MPa | BS 2782 |
Table 3 of 3
7 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Barcol Hardness (Model GYZ 934-1)* | 43 | — | BS 2782 |
| Deflection Temperature (under load 1.80 MPa) †* | 77 | ºC | BS 2782 |
| Water Absorption (24h, at 23°C)* | 17 | mg | BS 2782 |
| Tensile Strength* | 77 | MPa | BS 2782 |
| Tensile Modulus* | 3500 | MPa | BS 2782 |
| Elongation (at break)* | 4 | % | BS 2782 |
| Specific Gravity (at 25°C)* | 1.2 | — | BS 2782 |
