Do you know the classification of silicone pressure sensitive adhesives? Silicone pressure-sensitive adhesives have the good bonding strength and initial tack of general pressure-sensitive adhesives. Although they have a small share in the entire market, they are an irreplaceable type of adhesive in many special applications. Do you know the classification of the use of silicone pressure sensitive adhesives?

There are four main types of silicone pressure-sensitive adhesives, including solvent-based, high-solid content and solvent-free, hot-melt, and emulsion-based silicone pressure-sensitive adhesives.

1. Solvent-based silicone pressure-sensitive adhesive
Solvent-based silicone pressure-sensitive adhesives are the most developed, which can meet many practical needs and have excellent performance. The solvents used are toluene, xylene and petroleum ether. Although solvent-based silicone pressure-sensitive adhesives have excellent performance, their low solid content requires the use of a large amount of solvent, consumes a lot of raw materials and energy, and causes environmental pollution, which limits its further development.

2. High solid content type and solvent-free silicone pressure sensitive adhesive
In order to meet the requirements of environmental protection and reduce the use and emission of volatile organic compounds (VOCs) that pollute the air, high-solid content and solvent-free silicone pressure-sensitive adhesives are gradually developed. The significant advantage of the high solid content system is that it only needs a little or no solvent dilution, has a wide range of properties, is easy to formulate, and has simple requirements for production equipment, and can also be well coated on traditional low solid content adhesive coating machines. And curing, easy handling and storage.

3. Hot melt silicone pressure sensitive adhesive
The advantages of hot-melt silicone pressure-sensitive adhesives are: no organic solvent, safety and environmental protection, convenient construction, and can be coated with traditional equipment, low cost, and no pollution.

4. Emulsion type silicone pressure sensitive adhesive
Simple emulsion-type silicone pressure-sensitive adhesives are rarely reported, because organic surfactants need to be added when preparing silicone pressure-sensitive adhesive emulsions, which will adversely affect many properties of pressure-sensitive adhesives