| abstract |
(57) Abstract: [PROBLEMS] To provide a release film useful as a protective film such as a carrier film for coating a solvent-based adhesive solution, a solvent-based resin solution, a solvent-based ceramic slurry, or a solvent-based adhesive film. . A release layer containing a silicone-based polymer obtained by addition-polymerizing a polyphenylmethylsiloxane having a vinyl group and a hydrogensilane-based compound on at least one side of a polyester film using a Pt-based compound as a catalyst. And a ratio of phenyl groups in the total amount of methyl groups is 5 to 5 in the polyphenylmethylsiloxane having vinyl groups. 30 mol%, the concentration of the Pt-based compound in the release layer is 1 to 500 ppm as a Pt metal element, and the maximum surface tension (γ L max) of the release layer is 30 to 60 dyne / cm. Release film that is. |