US 12,258,294 B2
Cement and process for producing self-protecting cement
Alexander Ozersky, Richmond Hill (CA); and Alexander Khomyakov, Vaughan (CA)
Assigned to MACROCEMENT INDUSTRIES LTD., Toronto (CA)
Appl. No. 17/043,443
Filed by MACROCEMENT INDUSTRIES LTD., Toronto (CA)
PCT Filed Oct. 7, 2019, PCT No. PCT/CA2019/051430
§ 371(c)(1), (2) Date Sep. 29, 2020,
PCT Pub. No. WO2020/073119, PCT Pub. Date Apr. 16, 2020.
Claims priority of provisional application 62/770,303, filed on Nov. 21, 2018.
Claims priority of provisional application 62/743,796, filed on Oct. 10, 2018.
Prior Publication US 2021/0363058 A1, Nov. 25, 2021
Int. Cl. C04B 20/10 (2006.01); C04B 16/04 (2006.01); C04B 28/04 (2006.01)
CPC C04B 20/1029 (2013.01) [C04B 16/04 (2013.01); C04B 28/04 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A self-protecting cement comprising:
cement powder grains; and
a coating of wax on the cement powder grains, wherein the wax is provided as a solid and ground with the cement powder grains to form the coating, and the wax comprises alkyl ketene dimer wax and/or alkenyl ketene dimer wax and paraffin.