公开(公告)号：US20220403659A1

公开(公告)日：2022-12-22

申请号：US17755296

申请日：2020-11-12

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Taisiya Skorina ,  Rebecca L. A. Everman ,  Jean A. Tangeman ,  Eric J. Vanbruggen ,  Kenton D. Budd ,  Rachael A. T. Gould ,  Robert P. Brown ,  Lara K. N. Ughetta ,  Jonathan A. Hubin ,  Zachary M. Schaeffer

IPC: E04D7/00

Abstract: A plurality of photocatalytic coated ceramic granules comprising base ceramic granules, each having an outer surface, and a photocatalytic coating disposed on the outer surface. The photocatalytic coating comprising an inorganic binder and a plurality of photocatalytic particles selected from TiO2, ZnO, Ti(OH)4, doped derivatives thereof and combinations thereof. The photocatalytic particles have a surface area per weight of tire particles of no more than 30 square meters per gram (m2/g). The coated ceramic granules have a Total Solar Reflectance of at least 0.7.

公开(公告)号：US20240141649A1

公开(公告)日：2024-05-02

申请号：US18408421

申请日：2024-01-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Taisiya Skorina ,  Rebecca L. A. Everman ,  Jean A. Tangeman ,  Eric J. VanBruggen ,  Kenton D. Budd ,  Rachael A. T. Gould ,  Robert P. Brown ,  Lara K. N. Ughetta ,  Jonathan A. Hubin ,  Zachary M. Schaeffer

IPC: E04D7/00

CPC classification number: E04D7/005 ,  C04B2111/00586

Abstract: A method is disclosed for producing photocatalytic coated ceramic granules. The method involves providing a coatable composition containing an inorganic binder and a variety of photocatalytic particles, such as TiO2, ZnO, Ti(OH)4, doped derivatives, or combinations thereof. These photocatalytic particles have a surface area per weight of no more than 15 m2/g. The coatable composition is then applied to uncoated base ceramic granules, resulting in intermediate coated granules. Finally, the intermediate coated granules are heated at a temperature of at least 700° C., leading to the formation of photocatalytic coated ceramic granules. These granules exhibit a Total Solar Reflectance (TSR) value of at least 0.7. This method offers an efficient and effective way to produce ceramic granules with enhanced photocatalytic properties.