	US 11,981,601 B2
	In-situ polyphosphazene generation in cement for improved elastic properties
Hasmukh A. Patel, Katy, TX (US)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by ARAMCO SERVICES COMPANY, Houston, TX (US)
Filed on Jan. 5, 2021, as Appl. No. 17/141,783.
Prior Publication US 2022/0212989 A1, Jul. 7, 2022
Int. Cl. C04B 16/06 (2006.01); C04B 7/02 (2006.01); C04B 28/04 (2006.01); C08G 79/025 (2016.01); C09K 8/467 (2006.01); C04B 24/24 (2006.01); C04B 103/00 (2006.01)

CPC C04B 16/0675 (2013.01) [C04B 7/02 (2013.01); C04B 28/04 (2013.01); C08G 79/025 (2013.01); C09K 8/467 (2013.01); C04B 24/243 (2013.01); C04B 2103/0035 (2013.01); C04B 2103/0048 (2013.01)]

19 Claims

1. A composition of matter comprising:

a cement precursor;

a cyclic phosphazene oligomer; and

water,

wherein the cyclic phosphazene oligomer is configured to undergo polymerization to form a polyphosphazene polymer upon curing of the cement precursor.

14. A method of making a cement slurry comprising:

blending a phosphazene oligomer and a cement precursor to form a cement precursor mixture;

introducing water into the cement precursor mixture to form the cement slurry; and

polymerizing the cyclic phosphazene oligomer upon curing of the cement precursor, thereby forming a polyphosphazene polymer in a cement matrix.