Enhanced TDS
Identification & Functionality
- Chemical Family
- RTU Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Key Properties
- The flexibility of castings can be adapted to requirements by combining CY 220 and CY 221 in various proportions
- Low tendency to cracking
Applications & Uses
- Composites Processing Methods
- Product End Uses
- Markets
- Applications
Properties
- Physical Form
- Product Data (Guideline Values)
Araldite CY 220-1
Modified, medium viscosity, solvent free epoxy resin
Property Value Unit Test Method at condition Viscosity at 25°C appr. 5000 mPa·s ISO 12058 at 25°C Specific gravity at 25°C 1.10 - 1.20 g/cm³ ISO 1675 at 25°C Flash point > 150 °C DIN 51758 Epoxy content 5.0 - 5.2 Eq/kg ISO 3001 As supplied form - Pale yellow liquid
Hazardous decomposition products - Carbon monoxide, carbon dioxide and other toxic gases and vapours if burned
Disposal Regular procedures approved by national and/or local authorities
Araldite CY 221
Modified, low viscosity solvent free epoxy resin
Property Value Unit Test Method at condition Viscosity at 25°C appr. 355 - 475 mPa·s ISO 12058 at 25°C Specific gravity at 25°C 1.15 g/cm³ ISO 1675 at 25°C Flash point > 185 °C DIN 51758 Epoxy content 3.95 - 4.20 Eq/kg ISO 3001 As supplied form - Clear, pale yellow liquid
Hazardous decomposition products - Carbon monoxide, carbon dioxide and other toxic gases and vapours if burned
Disposal - Regular procedures approved by national and/or local authorities
Aradur HY 905
Modified, low viscosity hardener based on carboxylic acid anhydridesProperty Value Unit Test Method at condition Viscosity at 25°C 150 - 250 mPa·s ISO 12058 at 25°C Specific gravity at 25°C 1.18 - 1.22 g/cm³ ISO 1675 at 25°C Flash point 150 °C DIN 51758 As supplied form - Yellow or amber liquid
Hazardous decomposition products - Carbon monoxide, carbon dioxide and other gases and vapours if burned
Disposal - Regular procedures approved by national and/or local authorities
Regulatory & Compliance
- Certifications & Compliance
Technical Details & Test Data
- Fillers
- The chemical reaction initiated by mixing resin and hardener results in the generation of exothermic heat. The peak temperatures attained are determined by the starting temperature, size and shape of the casting being produced.
- Unfilled resin systems are suitable only for manufacturing castings weighing up to about 500 grams. Mineral fillers should be added to dissipate heat and damp the exothermic reaction when producing large castings.
- There is very little exothermic reaction when producing very small castings or thin layers as the heat generated is rapidly dissipated. Cure is consequently delayed and the surfaces of castings may remain tacky. In such cases, an infrared heater or oven should be used to effect full cure.
- Castings are best colored by adding an epoxy based Araldite coloring paste. Such pastes have hardly any effect on the processing or end properties of the casting resin system.
- Araldite Coloring Pastes
The coloring paste should normally be added to the resin component and mixed with it until homogeneous coloration results. Filled, highly viscous resin components are best heated to 40-60°C to facilitate uniform dispersion of the coloring paste. Colored resin or mixes of several coloring pastes and resins are stable for some considerable time if stored at room temperature.
- Processing Information
- The very low-viscosity Araldite® CY 221 flexible castings, whereas the medium vixcosity Araldite® CY 220-1 provides more rigid castings.
- The viscosity of the casting mix and/or the hardness of the castings can be varied by adjusting the mix ratio of the two resins.
- Premixes of the two resins have a shelf life at room temperature of several months.
- In most applications it is suitable to add the Accelerator DY 061. This allows curing at lower temperatures and reduces shrinkage. The added quantity of accelerator will affect pot life and curing parameter such as temperature and time. Dosing of Accelerator
- DY 061 to 100 parts of resin can be adapted in between 0.2 and 2.0 pbw for 100 pbw of resin.
- Depending on the proportion of accelerator, the pot life of mixtures at room temperature is 1-4 days.
- The resin and accelerator are first thoroughly mixed, then the hardener and any other components such as fillers, coloring pastes, etc. are added and intensively mixed.
- Properties Data
Provided a long curing time is acceptable (1-2 days), curing is possible at temperatures such as 80°C. To avoid internal stresses large casting should be gelled at temperatures around 100°C and then post cured at higher temperature. The minimum and optimum cure conditions are best determined by built up of practical tests.
Property System 1 System 2 Unit Test Method at condition Initial viscosity 550 250 mPa·s Hoeppler at 25°C Initial viscosity 75 45 mPa·s Hoeppler at 60°C Initial viscosity 40 35 mPa·s Hoeppler at 80°C Pot life to 1500 mPa·s at 60°C 4 - 5.5 4 - 6 h Hoeppler at 60°C Pot life to 1500 mPa·s at 80°C 90 - 120 45 - 75 min Hoeppler at 80°C Minimum curing time at 80°C > 24 > 24 h - at 80°C Minimum curing time at 100°C 3 - 4 4 - 6 h - at 100°C Minimum curing time at 120°C 2 2 - 3 h - at 120°C Guideline values determined on standard test specimens cured for 10 h/120°C
Property System 1 System 2 Unit Test Method at condition Color of castings yellowish yellowish - - - Specific gravity 1.15 1.15 g/cm³ DIN 55 990 at 25°C Hardness (4 mm plate) 87 81 Shore D DIN 53 505 at 25°C Flexural strength (max. bending stress) 145 65 MPa ISO 178 at 25°C Impact strength 20 55 kJ/m² ISO 179 at 25°C Compressive strength (max. compressive stress) 120 65 MPa ISO 604 at 25°C Tensile strength (max. tensile stress) 60 35 MPa ISO/R 527 at 25°C Elongation at break 1.5 4.5 % ISO/R 527 at 25°C Martens deflection temperature 85 35 °C DIN 53 458 at 25°C Water absorption (10 days at 23°C) 0.2 0.35 % ISO 62 at 23°C Water absorption (30 min at 100°C) 0.15 0.55 % ISO 62 at 100°C Electrolytic corrosion A-1 A-1 grade IEC 60426 - Tracking resistance CTI > 600 CTI > 600 CTI IEC 60112 - Electric strength (20 s value for 2 mm plate) 21 20 kV/mm IEC 60243 at 23°C
Safety & Health
- Handling Precautions
Safety precautions at workplace Protective clothing Yes Gloves Essential Arm protectors Recommended when skin contact likely Goggles/safety glasses Yes Respirator/dust mask Recommended Skin protection Before starting work Apply barrier cream to exposed skin After washing Apply barrier or nourishing cream Cleansing of contaminated skin Dab off with absorbent paper, wash with warm water and alkali-free soap, then dry with disposable towels. Do not use solvents Clean shop requirements Cover workbenches, etc. with light colored paper. Use disposable breakers, etc. Disposal of spillage Soak up with sawdust or cotton waste and deposit in plastic-lined bin Ventilation Of workshop Renew air 3 to 5 times an hour Of workplace Exhaust fans. Operatives should avoid inhaling vapors. - First Aid Information
Contamination of the eyes by resin, hardener or casting mix should be treatedimmediately by flushing with clean, running water for 10 to 15 minutes. A doctor should then be consulted. Material smeared or splashed on the skinshould be dabbed off, and the contaminated area then washed and treated with a cleansing cream . A doctor should be consulted in the event of severe irritation or burns. Contaminated clothing should be changed immediately. Anyone taken ill after inhalingvapors should be moved out of doors immediately. In all cases of doubt call for medical assistance.
- Industrial Hygiene
- Mandatory and recommended industrial hygiene procedures should be followed whenever the products are being handled and processed.
Storage & Handling
- Storage Conditions
Store the components in a dry place at 18-25°C, in tightly sealed original containers. Under these conditions, the shelf life will correspond to the expiry date stated on the label. After this date, the product may be processed only after reanalysis. Partly emptied containers should be tightly closed immediately after use.