Primer compositions for silicone pressure-sensitive adhesives

Primer compositions for silicone pressure-sensitive adhesives are still being developed.

Pressure sensitive adhesive label, pressure sensitive adhesive tape is the pressure sensitive adhesive coated on the substrate, used in a variety of industrial occasions. As the base material, the use of paper, plastic film, paper substrate pressure sensitive adhesive tape for the identification of store goods is essential, can be seen in all occasions of daily life.

On the other hand, as the use of plastic film as the base material of the product, there are also transparent tape and other general products, as an example can also be listed with high heat resistant film as the base material of heat resistant tape and other high energy tape used in harsher environment. On the raw materials of pressure sensitive adhesive, rubber, acrylic, silicone, etc., in these silicone pressure sensitive adhesive durability is considered to be the most excellent.

Specifically, heat resistance, cold resistance, weather resistance, chemical resistance and electrical insulation are good, where these characteristics are required to use silicone pressure sensitive adhesives. Silicone pressure-sensitive adhesives have a high price compared to other organic pressure-sensitive adhesives, but are used as materials for industrial high-function pressure-sensitive adhesives that cannot cope with these properties.

In addition, silicone pressure sensitive adhesive in the structure of its raw materials, on the surface of the wettability is very excellent, but also has the advantages of pasting difficult to roll into the bubble. This advantage has been effectively used as a pressure sensitive adhesive for the protection of mobile phone and other displays for pressure sensitive adhesive film. In addition, for smart phones and tablet terminals with touch panel structure, it is sometimes easy to get dirty due to direct contact with the finger screen, so the anti-fouling coated film pasted on the screen has been popular, and the use is increasing.

For this reason, silicone pressure sensitive adhesives often use plastic film as the base material. However, compared with paper substrate, plastic film has been pointed out that it has poor adhesion with coated resin. If the tightness is poor, sometimes the following problems occur: the back shift occurs when the roll is wound; The pressure sensitive adhesive layer migrates to the adherent after time is passed.