Patent ID: 9073297
Filing Date: 2015-07-07
Classification: B05D,B32B,C08J,C23C

Abstract:
1. A process for producing a transparent heat-resistant gas-barrier film, comprising the steps of: coating a polysilazane-containing solution onto at least one surface of a transparent polyimide film formed of a polyimide containing a repeated unit represented by the formula (I): wherein R is a C 4 to C 10 tetravalent group having a cyclic structure, an acyclic structure or both a cyclic structure and an acyclic structure; and φ is a C 2 to C 39 divalent linking group containing an aliphatic structural unit, an alicyclic structural unit, an aromatic structural unit, an organosiloxane structural unit or a combination or a repeating structure of these structural units, and may contain at least one group selected from the group consisting of —O—, —SO 2 —, —CO—, —CH 2 —, —C(CH 3 ) 2 —, —C 2 H 4 O— and —S— in a main chain thereof; and calcining the coated solution at a temperature of 180° C. or higher to laminate a silicon oxide layer obtained by the calcination on the transparent polyimide film.