CERAPEP
(Phenolic Urethane No Bake Process)
Product
CERAPEP is a highly reactive process for making sand cores and moulds in foundry by no bake process.
CERAPEP is a Phenolic Urethane No Bake binder process which provides excellent work time, uniform curring, fast stripping and handling of moulds and cores.It offers a highest bench life to strip time ratio than any other no bake processes. The weight, geometry of core or mould does not affect the stripping time. Like other no bake processes ambient air or temperature does not have any effect on curring speed or mechanism. Being a polyurethane, the process is sensitive towards contamination of moisture, so as base silica sand should be dry.
CERAPEP is a three part system
| CERAPEP R – 801 | Phenolic Resin dissolved in solvents. |
| CERAPEP H – 810 | Isocyanate, acts as a hardener. |
| CERAPEP C – 820 | Liquid catalyst. |
Typical Sand Mix
| Dry silica sand (AFS No 50 – 60) | 100 parts |
| CERAPEP R – 801 | 1.00 – 1.2 % BOS |
| CERAPEP H – 810 | 1.00 – 1.2 % BOS mix for 1-1½ minutes. |
| CERAPEP C – 820 | 3.00 – 10.00 % BO CERAPEP R-801. |
Typical Properties of CERAPEP
| PRODUCT | CERAPEP R-801 | CERAPEP H-810 | CERAPEP C-820 |
| COLOUR | Reddish brown | Dark brown | Light brown or yellow |
| APPEARANCE | Clear Liquid | Clear Liquid | Clear Liquid |
| SPECIFIC GRAVITY @30°C | 1.05 – 1.10 | 1.18 - 1.20 | 1.00 – 1.05 |
| VISCOSITY BY B4 CUP @30°C | 80 – 105 seconds | 14 – 20 seconds | 12 -16 seconds |
Material Safety Data Sheet (MSDS) is Available on Request
Typical Sand Mixing Cycle
Sand mixing can be done in either batch or continuous mixer, but one should ensure for no free resin lumps in sand mix.
Addition level of CERAFURAN C-710 controls the bench life and strip time.
Mixing cycle:
Sand + Premixed CERAPEP R-801 & CERAPEP C-820---- mix for 1-1½ minutes.
+CERAPEP H-810--- mix for 1-1½ minutes.
Sand can be prepared by using both continuous & batch type mixer.
Bench life of prepared sand - 2-4 minutes
Strip Time – 6 -10 minutes.
Typical Tensile Strength and other properties
| Immediate | 8 –10 kg/cm2 |
| 4 hours | 11 – 12 kg/cm2 |
| 24 hours | 13 – 16 kg /cm2 |
| Gas evolution | 12 -14 cc/gm max. |
Silent features of CERAPEP process
Mould & Core Paints
Shelf Life
Standard Packing
Storage & Handling
Store under roof away from heat & moisture. Direct flame contact should be avoided.
While handling, prescribed safety measures should be used.
Our Products
We offer a wide range of foundry products and services to meet the requirements of iron, steel and non-ferrous
foundries to help them to reduce defects, improve casting quality and optimise production costs.
