Scanbond product comparison

Introduction

This product comparison is designed to highlight the benefits of the new upgraded Scanbond backing compound, compared to another common type of backing compound. The comparison details the chemical properties which are then linked to EHS (Environmental Health Safety). Both backing compounds are used to fill intended cavities behind crusher mantles for rock crushers, as a support casting for the mantle while it is being worn. The backing compounds also protect the parts against which the crusher mantles are mounted.

The products compared have the same principle of preparation for the support casting as they are 2-component products. One component is the epoxy mass/molding compound itself (component A) which is to solidify and become the support behind the crusher mantles, the other is a hardener (component B ) which accelerates a chemical reaction leading to the hardening of the mass according to the manufacturers’ specification.

The overall mechanical properties and differences between the products.

Traditionally, a solvent is used in component A that is classified as a flammable substance, category 3. This solvent is called (Methoxy-2-propyl) acetate (CAS 108-65-6). In Scanbond, benzyl alcohol is used, which is a significantly better both from a flammability perspective and for health reasons.

The hardener in the compared Backing compound, i.e. component B is a mixture of aliphatic amine (TETA) and cycloaliphatic polyamine. The disadvantages of this substance as a hardener are that a temperature of 25°C is actually required for it to fully function. In winter when using the product this is a major disadvantage. TETA based hardeners are also highly volatile and therefore pose a greater risk of inhalation when mixing the components.

The hardener used in Scanbond is not as volatile, which reduces the risk of spreading/inhalation in the work area where everything is mixed. In addition, Scanbond uses a more advanced curing system, based on higher molecular weight aliphatic amines. Additional compounds are included to control the exothermic reaction and extend the shelf life of the hardener.

Conclusion

Scanbond offers the following advantages over most traditional types of Backing compound

1. lower flammability;

2. a less volatile hardener;

3. a more stable hardener with extended shelf life.

Scanbond is approved by the Swedish Chemicals Agency under A-number: 645333-6 and all ingredients originate from Finland, Italy and Sweden. The product is currently used by several major players, especially in the mining industry