DIMMING MATERIAL AND ITS MANUFACTURE

• Main Author: NOMURA SHIGERU
• Format: Patent
• Language: English
• Published: 20.04.1993
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; FIXED CONSTRUCTIONS; FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES,FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS,BLINDS, GATES; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; LADDERS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MINERAL OR SLAG WOOL; PERFORMING OPERATIONS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TRANSPORTING

PURPOSE:To provide a dimming material whose dimming function is hard to deteriorate irrespective of use for a long time and its manufacture. CONSTITUTION:This is a dimming material constituted of a transparent base plate and dimming film comprising water-soluble polymer such as poly-N- isopropil acrylic amide which is laminated on the base plate, shows sol.gel transfer and has different optical transmission according to a sol state and gel state and water contained into the water-soluble polymer, which is constituted of a water-soluble polymeric substance where the water-soluble polymer is crosslinked by applying electron rays to the water-soluble polymer. Then since the crosslinked water-soluble polymeric substance becomes meshy structure, a change of volume at the time of the sol.gel transfer is controlled and water is shut up in the meshy structure, prevention of aging deterioration of its dimming function becomes possible.