# US 12,760,161 B2 · Foams manufactured using silicone-functionalized polyethylene and methods of making the same

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- Number: US 12,760,161 B2
- Document ID: US12760161B2
- Status: Granted
- Kind: B2
- Application number: 18/245,508
- Filed: 2021-09-16
- Published: 2023-11-16
- Granted: 2026-10-13
- Earliest claimed: 2020-09-16
- Assignees: Dow Global Technologies LLC
- Applicants: Dow Global Technologies LLC
- Inventors: Bharat I. Chaudhary; Jian Yang; Arkady L. Krasovskiy; Andrew Heitsch; Brian Dorvel
- Web page: https://patentgrep.com/patent/US12760161B2

## CPC

- C08J 9/0061: {characterized by the use of several polymeric components}
- C08G 77/20: containing silicon bound to unsaturated aliphatic groups
- C08G 77/442: containing vinyl polymer sequences
- C08J 9/0023: {containing oxygen}
- C08J 9/141: {Hydrocarbons}
- C08K 5/101: of monocarboxylic acids
- C08G 2101/00: Manufacture of cellular products
- C08G 2110/005: < 50kg/m3
- C08J 2201/03: Extrusion of the foamable blend
- C08J 2203/14: Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
- C08J 2205/05: Open cells, i.e. more than 50% of the pores are open
- C08J 2205/052: Closed cells, i.e. more than 50% of the pores are closed
- C08J 2323/06: Polyethene
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

According to various embodiments, an extruded foam is formed from a composition comprising from 1 to 99 wt % of a silicone-functionalized polyethylene comprising a reaction product of the polymerization of ethylene and (meth)acrylic ester functionalized polydimethylsiloxane, and a physical blowing agent. The foam has a density of less than or equal to 0.200 g/cm3 as measured in accordance with ASTM D1622-88 at 25° C.

## Claims

### Claim 1

An extruded foam formed from a composition comprising:
from 1 to 99 wt % of a silicone-functionalized polyethylene comprising a reaction product of the polymerization of ethylene monomer with methacrylic ester functionalized polydimethylsiloxane; and
a physical blowing agent;
wherein the extruded foam has a density of less than or equal to 0.200 g/cm3 as measured in accordance with ASTM D1622-88 at 25° C.

### Claim 2 (depends on 1)

The extruded foam according to claim 1, wherein the silicone-functionalized polyethylene has a polydispersity index (PDI) of from 3 to 14.

### Claim 3 (depends on 1)

The extruded foam according to claim 1, wherein the silicone-functionalized polyethylene comprises one or more of the following structures:
where R1 is a bridge group that connects functional group methacrylate with siloxane, R2 is an end group selected from the group consisting of alkyl, substituted alkyl, aryl, alkenyl, H, and OH, x is an integer from 10 to 1000, y is an integer from 1 to 20, and PE is an ethylene-based polymeric branch.

### Claim 4 (depends on 1)

The extruded foam according to claim 1, wherein the composition further comprises from greater than 0 to 99 wt % of at least one additional olefinic polymer.

### Claim 5 (depends on 4)

The extruded foam according to claim 4, wherein the at least one additional olefinic polymer comprises LDPE.

### Claim 6 (depends on 1)

The extruded foam according to claim 1, wherein the composition further comprises from greater than 0 to 2 wt % permeability modifier.

### Claim 7 (depends on 6)

The extruded foam according to claim 6, wherein the permeability modifier comprises an amide or an ester of a C10 to C24 fatty acid.

### Claim 8 (depends on 1)

The extruded foam according to claim 1, wherein the physical blowing agent comprises carbon dioxide, hydrocarbons, or mixtures thereof.

### Claim 9 (depends on 1)

The extruded foam according to claim 1, wherein the physical blowing agent is present in an amount of 5 to 20 wt %.

### Claim 10 (depends on 1)

The extruded foam according to claim 1, wherein the extruded foam is open-cell.

### Claim 11 (depends on 10)

The extruded foam according to claim 10, wherein the extruded foam has a density of from 0.090 to 0.200 g/cm3.

### Claim 12 (depends on 1)

The extruded foam according to claim 1, wherein the extruded foam is closed-cell.

### Claim 13 (depends on 12)

The extruded foam according to claim 12, wherein the extruded foam has a density of from 0.015 to 0.200 g/cm3.

### Claim 14 (depends on 8)

The extruded foam according to claim 8, wherein the hydrocarbons are selected from isobutane, n-butane, isomers of pentane, or mixtures thereof.