	US 12,331,243 B2
	Cement compositions and methods of preparation thereof
Stephanie Grant, Houston, TX (US); David Germack, Houston, TX (US); and Steven Huynh, Houston, TX (US)
Assigned to KRATON CORPORATION, Houston, TX (US)
Filed by Kraton Corporation, The Woodlands, TX (US)
Filed on Apr. 18, 2024, as Appl. No. 18/639,204.
Claims priority of provisional application 63/496,925, filed on Apr. 18, 2023.
Prior Publication US 2024/0352303 A1, Oct. 24, 2024
Int. Cl. C09K 8/467 (2006.01); C04B 24/26 (2006.01); C04B 28/04 (2006.01); C04B 103/00 (2006.01); E21B 33/14 (2006.01)

CPC C09K 8/467 (2013.01) [C04B 24/2676 (2013.01); C04B 24/2688 (2013.01); C04B 28/04 (2013.01); E21B 33/14 (2013.01); C04B 2103/0051 (2013.01)]

19 Claims

1. A cement composition comprising:

100 parts by weight of a cement;

0.01-20 parts by weight of a modified styrenic block copolymer having:

at least one monoalkenyl arene polymer block A,

at least one conjugated diene polymer block B, and

at least an epoxy functional group or derivative thereof;

wherein:

the modified styrenic block copolymer has a degree of functionalization of 10-90% in the block B,

the modified styrenic block copolymer is characterized as having an absorption rate of at least 0.05% upon exposure to water for at least 7 days;

a mass ratio of an aqueous fluid to cement of 1:3 to 3:4.