	US 12,173,452 B2
	Paper coated with a functional polyolefin film
Alan M. Piwowar, Midland, MI (US); Ray E. Drumright, Midland, MI (US); Christina N. Ellison, Saginaw, MI (US); David L. Malotky, Midland, MI (US); Jonathan F. Mason, Midland, MI (US); Hari Katepalli, Midland, MI (US); Luqing Qi, Midland, MI (US); Houxiang Tang, Midland, MI (US); and Robert R. Bills, Midland, MI (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/917,684
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Apr. 15, 2021, PCT No. PCT/US2021/027421 § 371(c)(1), (2) Date Oct. 7, 2022, PCT Pub. No. WO2021/225764, PCT Pub. Date Nov. 11, 2021.
Claims priority of provisional application 63/020,322, filed on May 5, 2020.
Prior Publication US 2023/0151549 A1, May 18, 2023
Int. Cl. D21H 17/37 (2006.01); D21H 19/20 (2006.01); D21H 21/02 (2006.01); D21H 21/16 (2006.01)

CPC D21H 17/37 (2013.01) [D21H 19/20 (2013.01); D21H 21/02 (2013.01); D21H 21/16 (2013.01)]

8 Claims

1. A process for preparing an omniphobic single layered coating onto paper or paperboard comprising the steps of:

a) applying onto paper or paperboard a dispersion composition comprising water, a dispersant, a base polymer, and a neutralizing agent; and

b) heating the composition to produce a cured film having a thickness in the range of 1 to 20 g/m²;

wherein the sum of the dispersant and the base polymer comprise from 10 to 100 percent of the weight of polymer solids in the dispersion; wherein

the dispersant is a copolymer with an acid value of 130 or less, comprising structural units of ethylene and a carboxylic acid monomer, wherein the copolymer has a melt flow index in the range of from 50 to 2000 g/10 min at 190° C./2.16 kg; wherein the weight-to-weight ratio of structural units of ethylene to carboxylic acid monomer is in the range of from 95:5 to 70:30;

and wherein the dispersant has a concentration in the range of from 9 to 50 weight percent based on the weight of polymer solids in the dispersion, provided that the concentration of the dispersant in the composition is sufficient to form a cured film with a Cobb value of less than 18 g/m²and oil contamination of less than 25 percent;

the base polymer comprises non-functionalized ethylene-co-alkene copolymers, wherein the weight-to-weight ratio of the structural units of ethylene to alkene is in the range of from 99.8:0.2 to 50:50, has no copolymer comprising structural units of ethylene and a C₁-C₁₂-alkyl acrylate or methacrylate, and has a concentration in the range of from 1 to 90 weight percent, based on the weight of polymer solids in the dispersion; and

wherein the neutralizing agent is a hard base and excludes an organic base having a boiling point of less than 250° C.; wherein the concentration of the neutralizing agent is sufficient to neutralize at least half of the carboxylic acid groups present in the dispersion composition.