Antibacterial and heat-shielding composition for window film, method of producing window film using the same, and window film produced thereby

A method for producing an antibacterial and heat-shielding window film, the method comprising steps of:

• (1) forming a laminated half-finished film by forming a pigment adhesive layer on one surface of a first base film and depositing a second base film on the pigment adhesive layer, followed by pressing with a laminating roller;
• (2) forming an antibacterial and heat-shielding hard coating layer by coating one surface of the half-finished film with an antibacterial and heat-shielding solution;
• (3) forming a UV-shielding adhesive layer by adhering a UV-shielding layer to an exposed surface of the antibacterial and heat-shielding hard coating layer;
• and
• (4) depositing and laminating a release layer onto a top surface of the UV-shielding adhesive layer;
• wherein the antibacterial and heat-shielding solution in step (2) contains:
• 17.0 to 19.0 parts by weight of a monomer component composed of dipentaerythritol hexaacrylate and N,N-dimethylacrylamide;
• 0.85 to 0.95 parts by weight of any one or more liquid compounds selected from the group consisting of diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide, oligo[2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]propanone], 2-hydroxy-2-methylpropiophenone, and 2,4,6-trimethylbenzophenone;
• 0.35 to 0.40 parts by weight of 1-hydroxycyclohexylphenylketone;
• 0.15 to 0.20 parts by weight of phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide;
• 0.04 to 0.06 parts by weight of 2-propenoic acid, butyl ester;
• 50.0 to 78.0 parts by weight of a liquid heat-shielding agent;
• and
• 2.0 to 2.5 parts by weight of an antibacterial agent.