Kylmähartsi V-820 no-bake resin
Binding agent for cast moulds and cores, cures at room temperature and binds the sand to endure casting conditions
- Free formaldehyde content < 0.1%
- nitrogen content 3.8%
- builds high flexural strength
- good mould discharge
- dimensional accuracy
- curing time can be easily adjusted
- easy to clean
Resin 1150...1190 kg/m³
Resin V-820 1 % of sand weight
Catalyst K-222 0.33 % of sand weight
Can be stored unopened in a well ventilated, cool place for 3 months.
A typical mixing ratio is 1-1.5% of resin to the amount of sand. The suitable amount of catalyst is 30-50% of the resin amount used.
The final mould strength depends on the binder, dosage, sand quality and curing conditions. A higher binder dosage is recommended for core moulding.
Dosing affects the hardening speed. A higher catalyst amount speeds up the curing process, even though to some extent this will reduce the final strength. Catalyst overdose (over 60%) will result in a longer stripping time.
The sand must be free from alkaline impurities, preferably washed, cooled and dry. The sand temperature must not exceed 35 °C, otherwise the sand will cure in the mixer or at too early a stage. The higher the sand temperature, the less catalyst is needed and correspondingly, the lower the sand temperature, the higher dose of catalyst is needed. No-bake resin can be used as such with neutral and acidic sand grades (quartz, chromite, zircon etc.).
Properties of mixture
|Taivutuslujuus ( (N/cm2)||1h 120...160|
The information given in this product data sheet is based on our tests and our practical knowledge. The technical data is defined in standard conditions. Variations in local working conditions will affect the product performance and result. The result is also strongly affected by working methods. We guarantee the high quality of our products according to our Quality Management System. No liability can be accepted from incorrect use of the product or prevailing conditions, over which we have no control. Thus, we cannot be held responsible for the final result. The user of the product must test the product’s suitability for the intended application.
NOTE! When mixed together, resin-catalyst compound generates an intensive, heat-producing, explosion-like reaction. DO NOT MIX WITHOUT SAND! Should this happen, immediately add plenty of water to the mixture. Ensure sufficient ventilation in the working premises.
Avoid unnecessary skin contact with and exposure to the fresh product: use safety gloves, safety glasses and protective clothing.
Refer to material safety data sheet.
For information on product and package disposal, visit www.kiilto.com.