Primer composition for cured silicon-containing surface and its uses

1. A method for improving an adhesion of an adhesive to a cured silicon-containing surface, comprising applying a primer composition to the surface before applying the adhesive; and subjecting the surface to a plasma treatment before or after the composition is applied thereto;

wherein the primer composition comprises:

a polar organic solvent;

an acrylic monomer selected from a group consisting of hydroxymethyl acrylate, hydroxymethyl methacrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, and combinations thereof; and

an amino-containing silane having a formula of (R 1 O) x (R 2 ) y SiR 3 NHR 4 , wherein each R 1 independently represents H, C 1 -C 12 hydrocarbonyl, or aryl, each R 2 independently represents H, O, C 1 -C 12 hydrocarbonyl, or aryl, R 3 represents divalent C 1 -C 6 hydrocarbonyl being substituted or unsubstituted with one or more aryl rings and the carbon atom chain of the hydrocarbonyl can be inserted with one or more aryl rings, R 4 represents H, C 1 -C 12 hydrocarbonyl, amino-C 1 -C 12 hydrocarbonyl, or phenylamino, and x is 1, 2 or 3, y is 0, 1 or 2, and the sum of x and y is 3;

wherein the amount of the acrylic monomer ranges from about 0.01 wt % to about 25 wt % and the amount of the amino-containing silane ranges from about 1 wt % to about 35 wt %, based on the total weight of the composition.

2. The method of claim 1 , wherein the plasma treatment is carried out at a power of about 500 W to about 2500 W for about 1 minute to about 20 minutes.

3. The method of claim 2 , wherein the plasma treatment is carried out at a power of about 2000 W to about 2500 W for about 3 minutes to about 10 minutes.

4. The method of claim 1 , wherein the plasma treatment is carried out using a plasma selected from a group consisting of air plasma, nitrogen plasma, oxygen plasma, and combinations thereof.

5. The method of claim 4 , wherein the plasma is oxygen plasma.

6. The method of claim 1 , wherein the material of the silicon-containing surface is selected from a group consisting of glass, glass fiber, silicone elastomer, and combinations thereof.

7. The method of claim 6 , wherein the material of the silicon-containing surface is silicone elastomer.

8. The method of claim 1 , wherein the silicon-containing surface is a costume surface, a shoe surface, a surface of a costume label, a surface of a costume decoration, a surface of a shoe label or a surface of a shoe decoration.

9. The method of claim 1 , further comprising a step of drying the coated surface after applying the composition to the surface.