US 11,986,777 B2
Hollow fiber membranes with nucleating agent and methods of making and using the same
Kuan-Yin Lin, Woodbury, MN (US); James C. DeLozier, Fort Mill, SC (US); Aurore Y. J. Mercelat, Dinard (FR); Mark McCormick, St. Paul, MN (US); and Jinsheng Zhou, Woodbury, MN (US)
Assigned to 3M Innovative Properties Company, Saint Paul, MN (US)
Appl. No. 17/309,691
Filed by Solventum Intellectual Properties Company, Maplewood, MN (US)
PCT Filed Dec. 23, 2019, PCT No. PCT/IB2019/061311
§ 371(c)(1), (2) Date Jun. 15, 2021,
PCT Pub. No. WO2020/136568, PCT Pub. Date Jul. 2, 2020.
Claims priority of provisional application 62/885,572, filed on Aug. 12, 2019.
Claims priority of provisional application 62/785,639, filed on Dec. 27, 2018.
Prior Publication US 2021/0331120 A1, Oct. 28, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 53/22 (2006.01); B01D 67/00 (2006.01); B01D 69/02 (2006.01); B01D 69/08 (2006.01); B01D 71/26 (2006.01); B01D 19/00 (2006.01)
CPC B01D 69/02 (2013.01) [B01D 53/228 (2013.01); B01D 67/0027 (2013.01); B01D 69/088 (2013.01); B01D 71/261 (2022.08); B01D 71/262 (2022.08); B01D 19/0031 (2013.01); B01D 2053/224 (2013.01); B01D 2325/022 (2013.01); B01D 2325/04 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An asymmetric hollow fiber membrane comprising:
a porous substrate having a plurality of pores, wherein the porous substrate includes
a first semi-crystalline thermoplastic polyolefin (co)polymer comprising polypropylene, polyethylene or a combination thereof and
a melting alpha nucleating agent or a gamma nucleating agent in an amount effective to achieve nucleation; and
a skin layer overlaying the porous substrate, wherein the skin layer includes a second semi-crystalline thermoplastic polyolefin (co)polymer derived by polymerizing
at most 98 wt. % of 4-methyl-1-pentene monomer with at least 2 wt. % of linear or branched alpha olefin monomers selected from the group consisting of ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, isobutylene, vinylcyclohexane, 3-ethyl-1-pentene, 1,3-methyl-1-pentene, cyclobutene, cyclopentane, 2-norbornene, 3-methyl-2-norbornene, 5-methyl-2-norbornene, tetracyclododecene, methyltetracyclo-dodecene, dimethyltetracyclo-dodecene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-eicosene, or a combination thereof,
optionally wherein the first thermoplastic polyolefin (co)polymer is compositionally different from the second thermoplastic polyolefin (co)polymer.