Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
- Product Families
Features & Benefits
Applications & Uses
- Applications
- Composites End Use
- Formulation Guidelines
They are suitable for the construction of tanks, pipes and fumestacks to operate in a range of environments at eleveated temperatures. The resins can be used to back up other specialist Crystic resins, either to produce laminates of a combination of properties, or for economy. They can be used to laminate on Celmar® (glass fiber backed polypropylene) and to reinforce suitably treated uPVC, where the heat resistance and dimensional stability of GRP will upgrade the operating conditions of the material. They are also suitable for the fabrication of molds for heat-assisted contact molding and hot press molding processes. Crystic 198 can be used for the formulation of dough molding compounds (DMC’s) and, with suitable thickeners, for sheet molding compounds (SMC’s).
- Formulation:
Crystic 474PA is suitable for cold curing only. Both resins must be allowed to attain workshop temperature before being formulated for use, and should not be used at temperatures below 15ºC.
Parts by weight Formulation Crystic 474PA 100 Catalyst Powder B (Lucidol® CH50) - Norox® KP9 2 Crystic® Accelerator E - - N.B. Peroxide catalysts are highly reactive and may decompose with explosive violence, or cause fires, if they come into contact with flammable materials, metals or accelerators. For this reason they must never be stored in metal containers or be mixed directly with accelerators.
- Crystic 474PA is pre-accelerated and needs only the addition of catalyst to start the curing reaction. The correct amount of catalyst is therefore added and thoroughly stirred into the resin shortly before use. The resin temperature and the amount and type of catalyst control the gel time of Crystic 474PA. This can be approximately determined from below table which shows the gel time, 100 pbw Crystic 474PA containing 2 pbw Norox KP9.
Geltimes in minutes for catalyzed Crystic 474PA
Geltime in minutes at 15°C 40 Geltime in minutes at 20°C 22 Geltime in minutes at 25°C 12 Curing should not be carried out at temperatures below 15°C. The resin must be allowed to attain workshop temperature before being formulated for use. 20°C is recommended.
- Post Curing:
Crystic 474PA moldings have been cold cured, post curing is necessary in order to develop optimun heat and chemical resistance in the laminate. After release form the mold, laminates should be allowed to mature for 24 hours at workshop temperature (20°C). They should then be post cured for three hours at 80°C in service a further post curing period at the operating temperature should be given. The post cure is most effective if it is carried out immediately after the 24 hour maturing period.
- Fillers and Pigments:
When reduced fire hazard laminates are required, up to 20% by weight of either resin may be replaced by Crystic Prefil F. When absolutely necessary, the resin may be colored by the addition of up to 5% of a suitable Crystic Pigment Paste. When laminates with optimum heat resistance, chemical resistance and weather resistance are required, fillers and pigments should not be used since they can adversely affect these properties.
Properties
- Appearance
- cloudy mauvish
- Typical Properties
- Resin Properties - Unfilled Casting (Cured)
- Note
* - Filtered resin, void-free casting + 1 Mpa = 1 MN/m² = 1 N/mm² and is approximately 145 lbf/in² or 10.2 kgf/cm².
| Value | Units | Test Method / Conditions | |
| Viscosity (at 25°C, Ferranti shear rate - 37.35 sec⁻¹) | 500 | poise | — |
| Viscosity (at 25°C, Ferranti shear rate - 4,500 sec⁻¹) | 330 | poise | — |
| Specific Gravity (at 25°C) | 1.1 | — | — |
| Acid Value | 23 | mg KOH/g | — |
| Volatile Content | 38 | % | — |
| Gel Time (at 25°C, using 2% Norox KP9) | 12 | min | — |
| Value | Units | Test Method / Conditions | |
| Barcol Hardness (Model GYZJ 934 -1) | 50 | — | — |
| Water Absorption | 25 | mg | — |
| Deflection Temperature under Load (1.80 MPa) | 110 | °C | — |
| Specific Gravity (at 25°C) | 1.22 | — | — |
| Elongation at Break* | 2 | % | — |
| Volumetric Shrinkage | 8.2 | % | — |
| Tensile Strength | 60 | MPa | — |
| Tensile Modulus | 3800 | MPa | — |
Packaging & Availability
- Packaging Type
- Packaging Information
Crystic 474PA are supplied in 25kg kegs, 225kg drums, and 1125kg intermediate bulk containers.
Storage & Handling
- Shelf Life
- 3 Months (in dark, at 20°C)
- Storage Conditions
474PA 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. Where they have to be stored outside, it is recommended that drums be kept in a horizontal position to avoid the possible ingress of water. Wherever possible, containers should be stored under cover.