	US 11,731,106 B2
	Column packing material for supercritical fluid chromatography, column for supercritical fluid chromatography and preparation method therefor
Risa Ishii, Hitachi (JP); Michio Butsugan, Hitachi (JP); Keita Sakurai, Hitachi (JP); and Yuka Fujito, Kyoto (JP)
Assigned to SHIMADZU CORPORATION, Kyoto (JP)
Filed by SHIMADZU CORPORATION, Kyoto (JP)
Filed on Oct. 2, 2019, as Appl. No. 16/590,435.
Prior Publication US 2021/0101131 A1, Apr. 8, 2021
Int. Cl. B01J 20/26 (2006.01); B01D 15/20 (2006.01); B01D 15/40 (2006.01); G01N 30/56 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); C08F 20/14 (2006.01); B01J 20/281 (2006.01); G01N 30/02 (2006.01)

CPC B01J 20/267 (2013.01) [B01D 15/206 (2013.01); B01D 15/40 (2013.01); B01J 20/281 (2013.01); B01J 20/28004 (2013.01); B01J 20/3085 (2013.01); C08F 20/14 (2013.01); G01N 30/56 (2013.01); C08F 2810/20 (2013.01); G01N 2030/027 (2013.01); G01N 2030/565 (2013.01)]

8 Claims

1. A column packing material for supercritical fluid chromatography, comprising:

polymer particles containing a cross-linked polymer, the degree of swelling of the polymer particles after absorbing tetrahydrofuran is 1.32 or less, and the degree of swelling of the polymer particles after absorbing methanol is 1.37 or less,

wherein said cross-linked polymer comprises at least one member of the group consisting of divinyl benzene derived structural units and di(meth)acrylic acid ester derived structural units,

wherein the polymer particles are prepared by inducing seed polymerization of a polymerizable monomer in the presence of seed particles, and

wherein the degree of cross-linking of said cross-linked polymer is 90% or greater.