CERAREZ
(Two Part Phenolic Acid Binder System)
Product
CERAREZ R-201 is a Phenol-Formaldehyde resole resin cured by CERAREZ-C-210. The process is known as Phenolic acid two part no bake. This process is recommended and suitable for very large, thick and heavy section castings. The process is suitable for castings of any type of metal, irrespective of its weight.
CERAREZ-R-201 is reddish brown, clear liquid with no or very low nitrogen content. It is has very less odour and irritating smell.
Applications
CERAREZ-R-201 along with CERAREZ-C-210 is used for making silica sand moulds and cores for steel, iron and non-ferrous castings. The process work well with fresh sand as well as reclaimed sand. The used sand of CERAREZ can be reclaimed mechanically up to 80-85%. The addition level of CERAREZ-R-201 with its catalyst gets substantially reduced compared to freshsand.CERAREZ-R-201 contains proprietary additive which makes process easy for stripping and flexibility in mould handling. The process offers good thorough curing characteristics; hence there is no sagging or deformation of cores or moulds.
CERAREZ-R-201 can be used for flaskless moulding system.
Physical Properties
| PROPERTIES | CERAREZ R-201 | CERAREZ C-210 |
| Appearance | Reddish brown clear liquid | Reddish brown clear liquid |
| Sp. Gravity @30°C | 1.16 – 1.20 | 1.20 – 1.30 |
| Viscosity by B4 cup@30°C | 30 – 80 seconds | 13 – 20 seconds |
| Free formaldehyde | < 0.5% | - |
| Storage temperature | 15 -30°C | 15 – 30°C |
| Shelf life from date of manufacture | 2 months | 12 months |
CERAREZ-C-210 is available in wide range, to suit the seasonal demands of bench life, strip time and for metallurgical properties.
Material Safety Data Sheet (MSDS) is Available on Request
SAND MIX PREPARATION
| Dry silica sand [AFS 50-65] (free from carbonates and chlorides) |
100 parts |
| CERAREZ-R-201 | 1.5- 2.0% based on sand |
| CERAREZ-R-210 | 30-60 % based on CERAREZ-R-201 |
Note:- For good quality reclaimed sand, addition level will be
| CERAREZ-R-201 | 1.0- 1.5% based on sand |
| CERAREZ-C-210 | 30-60 % based on CERAREZ-R-201 |
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 CERAREZ-C-210 controls the bench life and strip time.
Mixing cycle:
Dry silica sand + CERAREZ-C-210-- mix for 1 – 1 ½ minutes
+ CERAREZ-R-201 mix for 2-3 minutes
These are typical mixing times, which can vary with speed and type of mixer.
Bench Life- 5-15 minutes
Stripping Time– 20-60 minutes
Strength Compressive (Resin-1.5% of sand, Catalyst-40% of Resin)
| Time | Strength in kg/cm2 |
| 1 Hr | 5-10 |
| 4 Hr | 15-20 |
| 24 Hr | >30 |
Strength will vary with quality of sand and ambient atmospheric conditions.
Mould & Core Wash: We recommend water base refractory wash.
Shelf Life
Standard Packing
Storage & Handling
CERAREZ-R-201 and CERAREZ-C-210, should stored separately, away from direct source of heat, moisture under roof at below 30°C
Never mix CERAREZ-R-201 and CERAREZ-C-210 together in a container, without sand. Direct mixing of CERAREZ-R-201 and CERAREZ-C-210 cause violent exothermic reaction.
Handle CERAREZ-R-201 and CERAREZ-C-210 with proper care by using safety tools like chemical resistance hand gloves, safety goggles
CERAREZ - BINDERS - STEEL CASTINGS
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.
