公开(公告)号：US20230332409A1

公开(公告)日：2023-10-19

申请号：US18028745

申请日：2021-09-07

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Taisiya Skorina ,  Kristin M. Amsden ,  Kenton D. Budd ,  Rebecca L.A. Everman ,  Jean A. Tangeman

IPC: E04D7/00

CPC classification number: E04D7/005

Abstract: A plurality of non-white roofing granules is provided. The roofing granules include a plurality of particles including mineral fines and a calcia-based cement binder; and a non-white pigment-containing coating disposed on at least a portion of exterior surfaces of the particles. Methods of making the roofing granules are also provided. One method includes: mixing material including mineral fines and a calcia-based cement binder to provide agglomerates; curing the agglomerates to provide particles; and coating at least a portion of exterior surfaces of the particles with a non-white pigment-containing coating. Another method of making the roofing granules includes: providing an aqueous dispersion in a tool having cavities, the aqueous dispersion including mineral fines and a calcia-based cement binder; curing the aqueous dispersion in the tool to provide particles; and coating at least a portion of exterior surfaces of the particles with a non-white pigment-containing coating. The roofing granules exhibit an intrinsic total solar reflectance greater than 0.3. Often, the roofing granules contain by-product mineral fines.

公开(公告)号：US12071765B2

公开(公告)日：2024-08-27

申请号：US18028745

申请日：2021-09-07

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Taisiya Skorina ,  Kristin M. Amsden ,  Kenton D. Budd ,  Rebecca L. A. Everman ,  Jean A. Tangeman

IPC: E04D7/00

CPC classification number: E04D7/005

Abstract: A plurality of non-white roofing granules is provided. The roofing granules include a plurality of particles including mineral fines and a calcia-based cement binder; and a non-white pigment-containing coating disposed on at least a portion of exterior surfaces of the particles. Methods of making the roofing granules are also provided. One method includes: mixing material including mineral fines and a calcia-based cement binder to provide agglomerates; curing the agglomerates to provide particles; and coating at least a portion of exterior surfaces of the particles with a non-white pigment-containing coating. Another method of making the roofing granules includes: providing an aqueous dispersion in a tool having cavities, the aqueous dispersion including mineral fines and a calcia-based cement binder; curing the aqueous dispersion in the tool to provide particles; and coating at least a portion of exterior surfaces of the particles with a non-white pigment-containing coating. The roofing granules exhibit an intrinsic total solar reflectance greater than 0.3. Often, the roofing granules contain by-product mineral fines.