TITANIUM DIOXIDE PARTICLES

• Main Authors: STEHNILEHND POL MARTIN, SEJER ROBERT MAJKL, TULI JAN ROBERT
• Format: Patent
• Language: English; Russian
• Published: 20.10.2014
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HUMAN NECESSITIES; HYGIENE; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INORGANIC CHEMISTRY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; NANOTECHNOLOGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

FIELD: chemistry.SUBSTANCE: invention can be used in the production of sun-protective products. Titanium dioxide particles possess a median weight average diameter of particles larger than 70 nm, and Elower than 9 l/g/cm, Efrom 25 to 50 l/g/cm and a ratio of E/Efrom 0.5 to 1.0. A method of obtaining the said titanium dioxide particles includes obtaining precursor-particles of titanium dioxide with the average length from 40 to 100 nm and/or average width from 3 to 25 nm and burning the precursor-particles at a temperature from 450 to 850°C.EFFECT: invention makes it possible to obtain titanium dioxide particles, possessing properties of the active absorption of an ultraviolet spectrum B (UVB) and high efficiency with respect to ultraviolet radiation of the spectrum A (UVA).15 cl, 9 ex Изобретение может быть использовано в производстве солнцезащитных продуктов. Частицы диоксида титана обладают медианным средневзвешенным диаметром частиц более 70 нм, а также Еменее 9 л/г/см, Eот 25 до 50 л/г/см и отношением Е/Еот 0,5 до 1,0. Способ получения указанных частиц диоксида титана включает получение частиц-прекурсора диоксида титана со средней длиной от 40 до 100 нм и/или средней шириной от 3 до 25 нм и обжиг частиц-прекурсора при температуре от 450 до 850°C. Изобретение позволяет получить частицы диоксида титана, обладающие свойствами эффективного поглощения ультрафиолетового излучения спектра В (УФВ) и высокой эффективностью в отношении ультрафиолетового излучения спектра А (УФА). 5 н. и 10 з.п. ф-лы, 9 пр.