LIGHT TRANSMISSIVE COMPOSITION AND OPTICAL FUNCTIONAL MEMBER USING THE SAME AND METHOD OF PRODUCING LIGHT TRANSMISSIVE COMPOSITION

• Main Authors: FUJIMOTO KYOICHI, OGAWA OSAMU, HAYASHI KOZO
• Format: Patent
• Language: English; Japanese
• Published: 08.12.2014
• Subjects: BLASTING; 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; HEATING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; MECHANICAL ENGINEERING; NON-LINEAR OPTICS; NON-PORTABLE LIGHTING DEVICES; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PERFORMING OPERATIONS; PHYSICS; SYSTEMS THEREOF; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

PROBLEM TO BE SOLVED: To provide a light transmissive composition that has high light transmittance and has an excellent light diffusion function, and a method of producing the same.SOLUTION: The light transmissive composition according to the present invention has a nano hollow silica particle having a primary particle diameter equal to or more than 30nm and equal to or less than 600nm, and a void which are dispersed in a light transmissive material. A volume ratio of the nano hollow silica particle to a total volume is equal to or more than 10 volume% and less than 70 volume%, and a volume ratio of the void to the total volume is equal to or more than 5 volume% and less than 50 volume%. Further, the method of producing the light transmissive composition has: a preparation step of preparing the nano hollow silica particle having a primary particle diameter equal to or more than 30nm and equal to or less than 600nm; a fluid dispersion preparing step of preparing a silica fluid dispersion by mixing the nano hollow silica particle, the light transmissive material and a solvent; and a void formation step of removing the solvent in the silica fluid dispersion, and forming a light transmissive resin composition having the void. 【課題】高い光透過率及び優れた光拡散機能を有する光透過性組成物及びその製造方法を提供する。【解決手段】本発明の光透過性組成物は、１次粒子径が３０ｎｍ以上６００ｎｍ以下のナノ中空シリカ粒子とボイドとが光透過性材料に分散されており、全体積に対する該ナノ中空シリカ粒子の体積比率は１０体積％以上７０体積％未満であり、全体積に対する該ボイドの体積比率は５体積％以上５０体積％未満である。また、この光透過性組成物の製造方法は、１次粒子径が３０ｎｍ以上６００ｎｍ以下のナノ中空シリカ粒子を用意する準備工程と、該ナノ中空シリカ粒子と、光透過性材料と、溶媒とを混合してシリカ分散液とする分散液調製工程と、該シリカ分散液中の溶媒を除去してボイドを有する光透過性樹脂組成物とするボイド形成工程と、を有する。【選択図】図１