	US 12,203,220 B2
	Formulation for size press applications
David J. Castro, DeKalb, IL (US); Victor Fuk-Pong Man, St. Paul, MN (US); Stephen Raye Marrou, Mount Prospect, IL (US); and Gang Pu, Shoreview, MN (US)
Assigned to Ecolab USA Inc., St. Paul, MN (US)
Appl. No. 17/607,145
Filed by ECOLAB USA INC., St. Paul, MN (US)
PCT Filed Mar. 31, 2020, PCT No. PCT/US2020/025918 § 371(c)(1), (2) Date Oct. 28, 2021, PCT Pub. No. WO2020/236312, PCT Pub. Date Nov. 26, 2020.
Claims priority of provisional application 62/850,267, filed on May 20, 2019.
Prior Publication US 2022/0205185 A1, Jun. 30, 2022
Int. Cl. D21H 23/56 (2006.01); D21H 19/32 (2006.01); D21H 19/54 (2006.01); D21H 21/16 (2006.01); D21H 21/20 (2006.01); D21H 21/24 (2006.01)

CPC D21H 23/56 (2013.01) [D21H 19/32 (2013.01); D21H 19/54 (2013.01); D21H 21/16 (2013.01); D21H 21/20 (2013.01); D21H 21/24 (2013.01)]

7 Claims

1. A method of treating paper, comprising:

applying a composition onto a paper press roll to form a coated paper press roll, the composition comprising a strength agent, a sizing agent, and a surfactant; and

contacting paper with the coated paper press roll to form a treated paper,

wherein the treated paper has a Cobb value equal to or less than a Cobb value of paper treated with the strength agent and the sizing agent but not with the surfactant;

wherein the strength agent is about 1 wt % to about 10 wt % of the composition;

wherein the surfactant is about 0.005 wt % to about 0.5 wt % of the composition; and

wherein the surfactant is an alkoxylated ethylenediamine, or wherein the surfactant comprises formula I:

wherein

n is an integer ranging from 0 to 100;

m is an integer ranging from 0 to 100;

x is an integer ranging from 1 to 3;

y is an integer ranging from 0 to 5; and

R₁is hydrogen, halogen, C_1-10alkyl, phenyl, or cycloalkyl.