FLUORINE-CONTAINING TITANIUM OXIDE - NANO-SILICA COMPOSITE PARTICLES AND METHOD FOR PRODUCING THE SAME

• Main Authors: SATO, Katsuyuki, FUKUSHIMA, Takeshi, SAWADA, Hideo
• Format: Patent
• Language: English; French; German
• Published: 17.02.2021
• Subjects: ADHESIVES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOUNDS THEREOF; DYES; INORGANIC CHEMISTRY; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NANOTECHNOLOGY; NATURAL RESINS; NON-METALLIC ELEMENTS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; POLISHES; PREPARATION OF CARBON BLACK; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES

Fluorine-containing titanium oxide - nano-silica composite particles comprising a condensate of a fluorine-containing alcohol and an alkoxysilane, and titanium oxide and nano-silica particles, wherein the fluorine-containing alcohol is represented by the general formula:         RF-A-OH     [I](wherein RFis a perfluoroalkyl group having 6 or less carbon atoms, or a polyfluoroalkyl group, in which some of the fluorine atom or atoms of the perfluoroalkyl group are replaced by a hydrogen atom or atoms, and which contains a terminal perfluoroalkyl group having 6 or less carbon atoms and a perfluoroalkylene group having 6 or less carbon atoms; and A is an alkylene group having 1 to 6 carbon atoms). The fluorine-containing titanium oxide - nano-silica composite particles do not have difficulty in handling as with hydrogen fluoride, can be produced by using a fluorine-containing alcohol, which can be easily handled, and can produce a product capable of suppressing a decrease in the function of the titanium oxide as a photocatalyst even when subjected to a high-temperature heat treatment.