	US 11,753,424 B2
	Crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide with large particle size and crystallization method for making same
Ying Bao, Tianjin (CN); Pei Zhao, Tianjin (CN); Mingshuo Chen, Tianjin (CN); Baohong Hou, Tianjin (CN); Chuang Xie, Tianjin (CN); and Lina Zhou, Tianjin (CN)
Assigned to Tianjin University, Tianjin (CN)
Filed by Tianjin University, Tianjin (CN)
Filed on Jan. 8, 2021, as Appl. No. 17/144,223.
Claims priority of application No. 202010028448.X (CN), filed on Jan. 10, 2020.
Prior Publication US 2021/0214380 A1, Jul. 15, 2021
Int. Cl. C07F 9/53 (2006.01); C09D 7/63 (2018.01); C07F 9/02 (2006.01); C08K 5/5397 (2006.01); C09D 167/02 (2006.01)

CPC C07F 9/5325 (2013.01) [C07F 9/025 (2013.01); C08K 5/5397 (2013.01); C09D 7/63 (2018.01); C09D 167/02 (2013.01); C07B 2200/13 (2013.01)]

13 Claims

1. A crystalline form of bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide with a large particle size, having:

an X-ray powder diffraction pattern comprising characteristic peaks at 4.7±0.1, 9.3±0.1, 12.2±0.1, 13.5±0.1, 14.0±0.1, 16.2±0.1, 17.3±0.1, 18.7±0.1, 19.6±0.1, and 24.9±0.1 degrees 2θ; wherein, the crystalline form belongs to a triclinic crystal system and to a space group P-1;

and wherein, the crystalline form is characterized by unit cell parameters equal to the following:

cell dimensions from single crystal:

a=8.0301(16)Å

b=8.6673(17)Å

c=19.252(4)Å

α=84.07(3°)

β=82.83(3°)

γ=63.75(3°)

molecules/unit cell (Z): 2.