Zeolite containing polyolefins films

Patent metadata

Field	Value
Publication number	US-12403670-B2
Application number	US-202118567978-A
Country	US
Kind code	B2
Filing date	Sep 19, 2021
Priority date	Sep 14, 2021
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

A method for producing zeolite embedded polyolefin films for packaging polyurethane foams also embedded with zeolite.

First claim

The invention claimed is:

1. A product comprising:
(1) a film including:
a monolayer or multi-layer film having at least one layer comprising a formulated resin; wherein the formulated resin comprises:
a low density polyethylene (LDPE) wherein the LDPE has a density of from 0.915 g/cc to 0.925 g/cc and a melt index, I2, of from 0.1 g/10 min to 1 g/10 min, or
a linear low density polyethylene (LLDPE) wherein the LLDPE has a density of from 0.915 g/cc to 0.945 g/cc and a melt index, I2, from 0.1 g/10 min to 1 g/10 min, and
at least a first silica containing zeolite with a Si/Al molar ratio of greater than 35 and a grain size from grain size of from 250 nm to 2000 nm, and
(2) a flexible polyurethane foam being the reaction production of an isocyanate component and an isocyanate-reactive component, the flexible polyurethane foam including at least a second silica containing zeolite, the silica containing zeolite having an Si/Al molar ratio of greater than 35 and a grain size of from 250 nm to 2000 nm.

2. The product of claim 1 , wherein the formulated resin comprises 30 wt % to 70 wt % post-consumer recycled polymer.

3. The product of claim 1 , wherein at least one silica containing zeolite has an Si/Al molar ratio of greater than 500 and less than 700.

4. The product of claim 1 , wherein the second silica containing zeolite is present in an amount ranging from 0.1 wt % to 20 wt % of the total isocyanate-reactive composition.

5. The product of claim 1 , wherein at least one silica zeolite additive has a pore size of less than 10 Å.

6. The product of claim 1 , wherein at least one silica zeolite additive has an Na wt % of less than 2.

7. The product of claim 1 , wherein the polyurethane foam is wrapped in the film.

8. The product of claim 1 , wherein the polyurethane foam has a density of around 35 kg/m 3 .

9. A method of packaging a polyurethane foam, comprising:
placing a polyolefin film within packaging of the polyurethane foam, wherein the polyolefin film comprises:
a monolayer or multi-layer film having at least one layer comprising a formulated resin; wherein the formulated resin comprises:
a low density polyethylene (LDPE) wherein the LDPE has a density of from 0.915 g/cc to 0.925 g/cc and a melt index, I 2 , of from 0.1 g/10 min to 1 g/10 min, or
a linear low density polyethylene (LLDPE) wherein the LLDPE has a density of from 0.915 g/cc to 0.945 g/cc and a melt index, I 2 , from 0.1 g/10 min to 1 g/10 min, and
at least a first silica containing zeolite with a Si/Al molar ratio of greater than 35 and a grain size from grain size of from 250 nm to 2000 nm, and wherein the polyurethane foam is comprised of:
at least one isocyanate-reactive component; and
at least a second silica containing zeolite, wherein the silica containing zeolite has an Si/Al molar ratio of greater than 35 and a grain size of from 250 nm to 2000 nm.

10. The method of claim 9 , wherein the formulated resin comprises 30 wt % to 70 wt % post-consumer recycled polymer.

11. The method of claim 9 , wherein at least one silica containing zeolite has an Si/Al molar ratio of greater than 500 and less than 700.

12. The method of claim 9 , wherein the second silica zeolite additive is present in an amount ranging from 0.1 wt % to 20 wt % of the total isocyanate-reactive composition.

13. The method of claim 9 , wherein at least one zeolite additive has a pore size of less than 10 Å.

14. The method of claim 9 , wherein at least one silica containing zeolite has an Na wt % of less than 2.

15. The method of claim 9 , wherein the polyurethane foam is wrapped in the film.

Assignees

• Dow Global Technologies Llc

Inventors

• Boopalachandran Praveenkumar
• Abebe Daniel G
• Sun Kefu
• Matteucci Scott T
• Cookson Paul
• Kilos Beata A

Classifications

• B32B27/327

  comprising polyolefins obtained by a metallocene or single-site catalyst · CPC title

• C08L2207/066

  LDPE (radical process) · CPC title

• C08L2203/16

  used for films · CPC title

• B01D2257/90

  Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708 · CPC title

• B01D2257/708

  Volatile organic compounds V.O.C.'s · CPC title