# US 10,865,298 B2 · Modified polyethylenes

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- Number: US 10,865,298 B2
- Document ID: US10865298B2
- Status: Granted
- Kind: B2
- Application number: 16/329,260
- Filed: 2016-08-31
- Published: 2019-07-25
- Granted: 2020-12-15
- Earliest claimed: 2016-08-31
- Assignees: Dow Global Technologies LLC
- Applicants: Dow Global Technologies LLC
- Inventors: Yunfeng Yang; Hongyu Chen; Alexander Williamson; Kalyan Sehanobish; Jorge Caminero Gomes; Yu Cai
- Web page: https://patentgrep.com/patent/US10865298B2

## CPC

- C08F 8/00: Chemical modification by after-treatment (graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C)
- C08L 23/26: modified by chemical after-treatment (saponified copolymers C08L23/0861; unsaturated acid salts C08L23/0876)
- C08F 255/02: on to polymers of olefins having two or three carbon atoms
- C08K 5/11: of acyclic polycarboxylic acids
- C08K 5/14: Peroxides
- C08K 5/17: Amines; Quaternary ammonium compounds
- C08K 5/23: Azo-compounds
- C08L 23/0815: {with aliphatic 1-olefins containing one carbon-to-carbon double bond}
- C08F 2810/20: leading to a crosslinking, either explicitly or inherently
- C08L 2207/062: HDPE
- C08L 2207/064: VLDPE
- C08L 2207/066: LDPE (radical process)
- C08L 2310/00: Masterbatches
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A composition includes polyethylene; a multifunctional co-agent having a functionality of 3 or greater, where the multifunctional co-agent is from 100 to 2000 ppm based upon the polyethylene; and a free radical generator, where the free radical generator is from 5 to 100 ppm based upon the polyethylene. Such composition may be utilized to form modified polyethylenes.

## Claims

### Claim 1

A composition comprising:
polyethylene;
a multifunctional co-agent having a functionality of 3 or greater, where the multifunctional co-agent is from 100 to 2000 ppm based upon the polyethylene; and
a free radical generator, where the free radical generator is from 5 to 80 ppm based upon the polyethylene.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the polyethylene is selected from the group consisting of linear low density polyethylene (LLDPE), metallocene catalyzed linear low density polyethylene (mLLDPE), high density polyethylene (HDPE), medium density polyethylene (MDPE), very low density polyethylene (VLDPE), and combinations thereof.

### Claim 3 (depends on 1)

The composition of claim 1, wherein the multifunctional co-agent is selected from the group consisting of acrylate compounds, methacrylate compounds, vinyl compounds, allylic compounds, and combinations thereof.

### Claim 4 (depends on 1)

The composition of claim 1, wherein the free radical generator is selected from the group consisting of peroxides, alkoxy amine derivatives, azo compounds, and combinations thereof.

### Claim 5 (depends on 1)

An article formed from the composition of claim 1.

### Claim 6

A method for forming a modified polyethylene comprising:
compounding a composition including:
polyethylene;
a multifunctional co-agent having a functionality of 3 or greater, where the multifunctional co-agent is from 100 to 2000 ppm based upon the polyethylene; and
a free radical generator, where the free radical generator is from 5 to 80 ppm based upon the polyethylene.

### Claim 7 (depends on 6)

The method of claim 6, wherein the compounding includes screw extruding the polyethylene, the multifunctional co-agent having the functionality of 3 or greater, and the free radical generator.

### Claim 8 (depends on 6)

The method of claim 6, wherein the polyethylene is selected from the group consisting of LLDPE, mLLDPE, HDPE, MDPE, VLDPE, and combinations thereof.

### Claim 9 (depends on 6)

The method of claim 6, wherein the multifunctional co-agent is selected from the group consisting of acrylate compounds, methacrylate compounds, vinyl compounds, allylic compounds, and combinations thereof.

### Claim 10 (depends on 6)

The method of claim 6, wherein the free radical generator is selected from the group consisting of peroxides, alkoxy amine derivatives, azo compounds, and combinations thereof.

### Claim 11 (depends on 6)

A modified polyethylene formed by the method of claim 6.