Lang T Nguyen

US Patent:

20210317038, Oct 14, 2021

Filed:

Oct 31, 2019

Appl. No.:

17/287585

Inventors:

- Boston MA, US
Qingling Zhang - Beverly Hills MI, US
Lang H. Nguyen - Lowell MA, US
Lynne K. Larochelle Richard - Littleton MA, US
Benjamin Dupnik - Melrose MA, US
John Mathew - Westford MA, US
Koenraad C.J. Burger - Voorschoten, NL
Geoffrey D. Moeser - Groton MA, US

International Classification:

C04B 20/02
C04B 28/04
C04B 14/02
C04B 40/00
C09C 1/56

Abstract:

Pigmented masonry compositions are provided that include chemically treated carbon black pigments having attached an organic group including an ionic or an ionizable group, the ionic or ionizable group being present at a level from 1.0 to 3.0 μmol/m. The compositions exhibit excellent color consistency and jetness and provide consistent color after long term exposure to high levels of moisture.