What is the main difference between epoxy rubber and other kinds of rubber, such as polyurethane, room temperature vulcanized silicone rubber, MS (polyurethane hybrid rubber), polysulfide rubber? What

What is the main difference between epoxy rubber and other kinds of rubber, such as polyurethane, room temperature vulcanized silicone rubber, MS (polyurethane hybrid rubber), polysulfide rubber? What are the main advantages and disadvantages? The most significant characteristic of epoxy resin system is that it reflects the basic characteristics of thermosetting resin. Polyurethane, room temperature vulcanized silicone rubber, MS (polyurethane hybrid adhesive) and polysulfide rubber are typical thermoplastic materials. In terms of molecular structure, the three-dimensional network formed by epoxy curing is composed of rigid molecular skeleton, while the main chain of thermoplastic material is composed of flexible molecules, showing elasticity, thus showing high elongation and certain tensile strength.

 

 

The main advantages of epoxy adhesive are as follows:

Good mechanical properties

Small volume shrinkage

Good waterproof and weather resistance

Chemical resistance, mildew proof

Most materials, such as brick, wood, plastic, are suitable for bonding

The main disadvantages of epoxy adhesive are as follows

Poor toughness, brittle fracture under stress

 

In some cases, the curing time is long