Composition for odor suppression

Patent metadata

Field	Value
Publication number	US-11634569-B2
Application number	US-201916767749-A
Country	US
Kind code	B2
Filing date	Aug 26, 2019
Priority date	Aug 31, 2018
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

A composition for odor control includes (A) from 85 wt % to 99.5 wt % of an olefin-based compound and (B) from 15 wt % to 0.5 wt % of an odor suppressant. The odor suppressant includes a blend of (i) an ionomer, (ii) particles of zinc oxide, and (iii) particles of copper oxide. The composition has a methyl mercaptan odor suppression value of greater than 45% as measured in accordance with ASTM D5504-12.

First claim

The invention claimed is:

1. A composition comprising:
(A) from 85 wt % to 99.5 wt % of an olefin-based polymer;
(B) from 15 wt % to 0.5 wt % of an odor suppressant comprising a blend of
(i) an ionomer;
(ii) particles of zinc oxide;
(iii) from 0.01 wt % to 0.1 wt % of particles of copper (I) oxide, based on the total weight of the odor suppressant; and
the composition has a methyl mercaptan odor suppression value of greater than 45% as measured in accordance with ASTM D5504-12.

2. The composition of claim 1 , wherein the olefin-based polymer is an ethylene-based polymer.

3. The composition of claim 2 , wherein the ethylene-based polymer is an ethylene/C 4 -C 8 α-olefin copolymer having a melt index (I 2 ) from 0.5 g/10 min to 15 g/10 min and a density of 0.910 g/cc to 0.930 g/cc.

4. The composition of claim 1 , wherein the ionomer is a metal ionomer.

5. The composition of claim 1 , wherein the ionomer is a zinc ionomer.

6. The composition of claim 5 , wherein the ionomer is a zinc salt of a polymer selected from the group of ethylene/methyl-methacrylic acid, ethylene/vinyl acrylic acid, ethylene/methacrylate, ethylene/n-butyl acrylic acid, and ethylene acrylic acid.

7. The composition of claim 1 , wherein the particles of zinc oxide have a D50 particle size from 100 nm to 3000 nm.

8. The composition of claim 1 , wherein the particles of copper oxide are selected from the group of copper (I) oxide and copper (II) oxide.

9. The composition of claim 8 , wherein the particles of copper oxide have a D50 particle size from 100 nm to 3000 nm.

10. The composition of claim 1 , wherein the weight percent ratio between the ionomer (Bi) the zinc oxide (Bii) and the copper oxide (Biii) is from 150:100:1 to 2.9:2.5:1.

11. A film comprising:
a composition comprising:
(A) from 85 wt % to 99.5 wt % of an olefin-based polymer;
(B) from 15 wt % to 0.5 wt % of an odor suppressant comprising a blend of
(i) an ionomer;
(ii) particles of zinc oxide;
(iii) from 0.01 wt % to 0.1 wt % of particles of copper (I) oxide, based on the total weight of the odor suppressant; and

the composition has a methyl mercaptan odor suppression value of greater than 45% as measured in accordance with ASTM D5504-12.

12. The composition of claim 1 , wherein the ratio of (Bii) particles of zinc oxide to (Bi) the ionomer is from 3:1 to 1:7, based on the total weight of the odor suppressant (B).

13. The composition of claim 10 , wherein the weight percent ratio between the ionomer (Bi) the zinc oxide (Bii) and the copper (I) oxide (Biii) is from 12.5:12.5:1 to 2.5:2.5:1.

Assignees

• Dow Global Technologies Llc

Inventors

• Krasovskiy Arkady L
• Sun Kefu
• Lu Keran
• Matteucci Scott T
• Williamson Alexander
• Ruiz Jose Eduardo
• Bonekamp Jeffrey E

Classifications

• C08L2203/16

  used for films · CPC title

• C08L23/0876

  Salts thereof, i.e. ionomers · CPC title

• C08K2003/2296

  of zinc · CPC title

• C08K2201/005

  Additives being defined by their particle size in general · CPC title

• C08K2201/014

  Additives containing two or more different additives of the same subgroup in C08K · CPC title