公开(公告)号：US20200147577A1

公开(公告)日：2020-05-14

申请号：US16620141

申请日：2018-06-13

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jean A. Tangeman ,  Rebecca L. A. Everman ,  Taisiya Skorina ,  Robert P. Brown ,  Kenton D. Budd

IPC: B01J13/14 ,  B01J13/22

Abstract: Plurality of granules comprising a ceramic core having an outer surface and a shell on and surrounding the core, wherein the shell comprises at least first concentric layers, wherein the first layer comprises first ceramic particles bound together with a first inorganic binder, wherein the first inorganic binder comprises reaction product of at least alkali silicate and hardener, wherein the shell of each granule collectively has a volume of at least 40 volume percent, based on the total volume of the respective granule, and wherein the granules have a minimum Total Solar Reflectance of at least 0.7. The granules are useful, for example, as roofing granules.