Sandsil-123 M
(Silicate base binders with inbuilt breakdown agent)
  • Sand & Resin Binders

The Product

SANDSIL-123 M is a sodium- silicate base binder with adjusted ratio of Na2O : SiO2 for making moulds and cores by Co2 process.

This product is specifically designed where cores are prepared by shooting process.

The Process

SANDSIL-123M - Co2 process is based on principle of precipitation silicate solution by Co2.

The reaction proceeds as under :
SiO2 + Na2O + H2O (L)+Co2 (g) ----> H2CO3+ Na2O+ SiO2

Carbonic acid reacts with sodium silicate and forms silica gel
H2CO3+ Na2O+ SiO2-------> SiO2 (gel) + Na2 Co3 . H2O (glass)
Na2O 2SiO2.H2O +Co2 -----> Na2 Co3 + 2SiO2 + H2O contd. gassing
Na2 Co3 + 2SiO2 + H2O -------------> 2 Na2HCO3+2SiO2 (Silica – Gel )

Dehydrates the Gel giving bond When the SANDSIL is mixed with Sand, the sand grains are covered with a thin film of SANDSIL, on blowing Co2 gas, the individual Sand grains are cemented to each other at their contact points by Silica–Gel to give a firm bond.

  • Dry Silica Sand (AFS55#65): 100 Parts
  • SANDSIL : 4 to 5 Parts.
  • 3 to 4 Minutes
  • Mixed Sand should be covered with wet cloth for increasing the bench life.
PROPERTIES SANDSIL-123M
Colour Bluish
Appearence Liquid
Breakdown properties Excellent
Specific Gravity @27˚± 3˚ C 1.45 – 1.55
Baume@27˚± 3˚ C 47 – 52
Application Heavy C.I. Steel Casting
  • 200 Kg. MS Barrel / 30 Kg Plastic carboy

Shelf Life - NA.

Note - Above information is true and accurate based on controlled laboratory testing. However user is responsible for determining suitability for application at their end. No guarantee is implied since the condition in actual use differs widely & beyond our control.