Nathaniel E Greene

US Patent:

20220235152, Jul 28, 2022

Filed:

Apr 11, 2022

Appl. No.:

17/717598

Inventors:

- Ludwigshafen, DE
Thomas Gieger - Ludwigshafen, DE
Thomas Daniel - Ludwigshafen, DE
Marcus Schroeder - Ludwigshafen, DE
Michelle Morano - Charlotte NC, US
Nathaniel Troy Greene - Charlotte NC, US

International Classification:

C08F 2/22
C08K 3/011
A61L 15/60
B01J 20/26
B01J 20/28
C08F 2/01
C08F 2/44
C08F 6/14
C08F 220/06
C08J 3/12
C08J 3/24
C08K 3/30
C08K 5/5317

Abstract:

A process for producing superabsorbents, comprising polymerization of a monomer solution and thermal surface postcrosslinking, wherein the monomer solution comprises at least 0.75% by weight of a hydroxyphosphonic acid or salts thereof, calculated on the basis of the total amount of monomer used, and at least 0.09% by weight of aluminum cations, calculated on the basis of the total amount of polymer particles used, is added to the polymer particles before, during or after the thermal surface postcrosslinking.

US Patent:

20210301040, Sep 30, 2021

Filed:

Aug 1, 2017

Appl. No.:

16/321638

Inventors:

- Ludwigshafen am Rhien, DE
Thomas Gieger - Ludwigshafen, DE
Thomas Daniel - Ludwigshafen, DE
Marcus Schroeder - Ludwigshafen, DE
Michelle Morano - Charlotte NC, US
Nathaniel Troy Greene - Charlotte NC, US

International Classification:

C08F 2/22
A61L 15/60
C08F 2/01
C08F 2/44
C08K 3/011
C08J 3/24
C08J 3/12
C08F 220/06
C08K 5/5317
C08K 3/30
B01J 20/28
B01J 20/26
C08F 6/14

Abstract:

A process for producing superabsorbents, comprising polymerization of a monomer solution and thermal surface postcrosslinking, wherein the monomer solution comprises at least 0.75% by weight of a hydroxyphosphonic acid or salts thereof, calculated on the basis of the total amount of monomer used, and at least 0.09% by weight of aluminum cations, calculated on the basis of the total amount of polymer particles used, is added to the polymer particles before, during or after the thermal surface postcrosslinking.