COMPOSITION FOR FORMING PEELING LAYER

• Main Authors: SHINDO KAZUYA, EBARA KAZUYA
• Format: Patent
• Language: English; Japanese
• Published: 10.10.2019
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MINERAL OR SLAG WOOL; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING

To provide a composition for forming a peeling layer, with which adhesion to a glass substrate having the peeling layer formed thereon is maintained and peeling at the interface with the glass substrate does not take place, and on the other hand a layer or a group of layers formed on the upper side of the peeling layer is/are easily peeled off from the peeling layer.SOLUTION: The problem is solved by using a composition which is a composition for forming a peeling layer just above a glass substrate and which has: (A) an aromatic polyimide and/or an aromatic polyimide precursor; and (B) an amide-based solvent and in which the aromatic polyimide derived from (A) satisfies (1) to (4) written below: (1) a temperature of 1% weight loss in weight change on heating is 500°C or more; (2) the refractive index at a wave length of 1,000 nm is 1.7 or more; (3) difference between the refractive index and the birefringence at the wave length of 1,000 nm is 0.15 or more; and (4) the surface energy is 40 dyne/cm or more.SELECTED DRAWING: None 【課題】剥離層が設けられるガラス基板との密着性が維持されガラス基板との界面での剥離が生じない一方、剥離層より上部に形成される層又は層群を剥離層から簡易に剥離することができる、該剥離層を形成するための組成物の提供。【解決手段】ガラス基板直上に設ける剥離層を形成するための組成物であって、該組成物が（Ａ）芳香族ポリイミド及び／又は芳香族ポリイミド前駆体；及び（Ｂ）アミド系溶媒；を有し、前記（Ａ）由来の芳香族ポリイミドは、下記（１）〜（４）を満たす組成物により、上記課題を解決する：（１）加熱時の重量変化における１％重量減少の温度が５００℃以上；（２）波長１０００ｎｍで屈折率が１．７以上；（３）波長１０００ｎｍで屈折率と複屈折の差が０．１５以上；及び（４）表面エネルギーが４０ｄｙｎｅ／ｃｍ以上。【選択図】なし