Furan Acid Cured Resin (No-Bake System)
A premium furfuryl alcohol-based self-setting binder system for grey iron, SG (ductile) iron, and steel foundries. Delivers excellent thermal collapsibility, superior mechanical strength, and maximum sand reclamation efficiency of up to 90%.
Self-Hardening Furan Resin System for High Sand Reusability
Furan Acid Cured Resin (Furan No-Bake System) is an acid-catalyzed, self-setting binder synthesized predominantly from furfuryl alcohol. Widely recognized in the foundry industry as a versatile and economical no-bake solution, this two-part system consists of a liquid furan resin and a liquid acid catalyst (typically Paratoluene Sulfonic Acid - PTSA, or sulfonic acid blends). Upon mixing, an exothermic polycondensation reaction takes place, curing the sand mould and core evenly at ambient workshop temperature without external heat.
Formulated specifically for medium to heavy casting production, our furan binders offer superior thermal collapsibility that facilitates easy shakeout and minimizes post-cast fettling costs. With ultra-low free formaldehyde (< 1%) and tailored nitrogen grades (from nil to low nitrogen levels), BR Chemicals furan binders effectively eliminate gas defects, pinholing, and nitrogen fissures in cast iron and cast steel operations, while supporting exceptional mechanical sand reclamation rates of up to 90%.
Engineered for Mold Strength & Sand Economy
A proven furan no-bake resin system trusted across Indian foundries for dimensional accuracy and cost-efficient sand reuse.
90% Sand Reusability
High thermal breakdown characteristics enable up to 90% reclaimed sand utilization, drastically cutting virgin sand procurement and disposal costs.
Adjustable Strip Time
Curing speed is readily adjusted from 10 minutes to over an hour simply by tuning the catalyst grade and dosage according to ambient climate.
Ultra-Low Gas Defects
High purity furfuryl alcohol formulation reduces gas evolution upon pouring, avoiding blowholes, pinholes, and metal penetration.
Effortless Shakeout
Excellent hot collapsibility allows sand to crumble freely from internal cavities and narrow channels, reducing fettling man-hours.
Foundry Applications
- Grey Cast Iron (CI) and Spheroidal Graphite (SG / Ductile) Iron molds and cores
- Low carbon steel, alloy steel, and heavy capital equipment steel casting molds
- Heavy machine tool beds, diesel engine crankcases, pump bodies, and turbine castings
- Non-ferrous alloy castings requiring superior surface finish and clean shakeout
- Continuous sand mixing machines as well as batch-type sand preparation mills
- Compatible with Silica sand, Chromite sand, Olivine sand, and Zircon sand aggregates
The Two-Component Binder System
Furfuryl Alcohol Resin
A low-viscosity, amber-yellow polycondensation resin that provides instantaneous sand wetting, superior flowability, and dependable final cured strength.
Acid Catalyst (Hardener)
Specialized organic sulfonic acid solutions (PTSA / BSA blends) tailored in fast, medium, and slow grades to balance bench life with strip time.
Reclaimed & Virgin Sand
Optimized specifically for high-efficiency sand reclamation plants, retaining low loss on ignition (LOI) and minimal residual acid buildup over multiple cycles.
Processing & Handling Guidelines
Sand Preparation & Mixing
Ensure sand is completely dry, clean, and free of alkaline contaminants. If switching from an alkaline phenolic system, thoroughly clean and purge the mixer, trough, and screw blades. First blend the acid catalyst with the sand thoroughly, then add the furan resin to ensure uniform distribution and avoid localized premature curing.
Handling & Safety Precaution
CRITICAL WARNING: Direct contact or mixing between raw Resin and concentrated Acid Catalyst without sand can trigger an instantaneous, violent exothermic reaction. Never pre-mix resin and catalyst directly. Store them separated in well-ventilated areas. Operators should use nitrile gloves, safety goggles, and barrier skin creams during handling.
Technical Specifications
| Property / Parameter | Specification / Typical Value |
|---|---|
| Binder System | Furan Acid Cured No-Bake System (Two-Part) |
| Chemical Base | Furfuryl Alcohol (FA) Copolymer Resin |
| Physical State & Colour | Low viscous, clear amber to yellowish liquid |
| Density (at 20°C) | 1.10 – 1.20 g/cm³ |
| Viscosity (at 25°C) | 15 to 25 seconds in B4 Cup (approx. 20 – 45 mPa·s) |
| Free Formaldehyde | < 1.0% max |
| Nitrogen Content | Nil to 0.2% max (Steel Grade) / Up to 2.5% (Cast Iron Grade) |
| Recommended Addition Level | 0.8% – 1.2% Resin on Sand weight; 30% – 50% Catalyst on Resin weight |
| Reclamation Capability | Up to 90% mechanically reclaimed sand reusability |
| Standard Packaging | 220 Kg M.S. / HDPE Drums & 1200 Kg IBC Containers |
| Shelf Life & Storage | 6 months at 20°C in sealed original drums. Store in a cool, shaded area away from direct sunlight, moisture, and acid hardeners. |
*Values are indicative for standard foundry grades. Custom formulations with tailored bench life, strip times, and nitrogen content are readily available for specific casting alloys and foundry operating conditions.
Optimize Your Sand Economy with BR Chemicals
Share your sand specs, metal grade, and mold cycle requirements. Our foundry chemical engineers will recommend the ideal furan resin grade, catalyst pairing, and addition ratios along with samples for plant trials.
