# US 8,772,414 B2 · Polymeric compositions and foams, methods of making the same, and articles prepared from the same

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- Number: US 8,772,414 B2
- Document ID: US8772414B2
- Status: Granted
- Kind: B2
- Application number: 13/062,241
- Filed: 2009-09-16
- Published: 2011-06-30
- Granted: 2014-07-08
- Earliest claimed: 2008-09-16
- Assignees: Dow Global Technologies LLC
- Applicants: Wenbin Liang; Brian W. Walther; Gary R. Marchand
- Inventors: Wenbin Liang; Brian W. Walther; Gary R. Marchand
- Web page: https://patentgrep.com/patent/US8772414B2

## CPC

- C08J 3/24: Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K)
- C08J 9/04: using blowing gases generated by a previously added blowing agent
- C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers
- C08J 2201/024: Preparation or use of a blowing agent concentrate, i.e. masterbatch in a foamable composition
- C08J 2203/04: N2 releasing, ex azodicarbonamide or nitroso compound
- C08J 2323/16: Ethene-propene or ethene-propene-diene copolymers
- C08L 91/00: Compositions of oils, fats or waxes; Compositions of derivatives thereof
- 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)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The invention provides a composition comprising an ethylene/α-olefin/non-conjugated diene interpolymer, which has the following properties: an Mz(abs)/Mz(Conv) value greater than 1.35; an Mz(BB)/Mw(abs) value greater than 1.6; and a non-conjugated diene content less than 10 weight percent, based on the total weight of the interpolymer.

## Claims

### Claim 1

A composition comprising an ethylene/α-olefin/non-conjugated diene interpolymer, which has the following properties: an Mz(abs)/Mz(Conv) value greater than 1.35; an Mz(BB)/Mw(abs) value greater than 1.6; and a non-conjugated diene content less than 10 weight percent, based on the total weight of the interpolymer; a viscosity ratio (η0.1/η100), at 190° C., from 70 to 300; and a gel content less than 3 weight percent; and
wherein the ethylene/α-olefin/non-conjugated diene interpolymer is formed by reacting at least the following: a base ethylene/α-olefin/non-conjugated diene interpolymer and a coupling agent, and
wherein the ethylene/α-olefin/non-conjugated diene interpolymer has a percent change in melt viscosity (0.1 rad/sec, 190° C.) greater than 130%, and a Mooney viscosity (ML 1+4 at 125° C.) greater than 60, and
wherein the base ethylene/α-olefin/non-conjugated diene interpolymer has the following properties: an Mz(abs)/Mz(Conv) value less than 1.3; an Mz(BB)/Mw(abs) value greater than 1.6 but less than 2.5; and an Mw(abs) value less than 350,000 g/mole.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the interpolymer has a Mooney viscosity (ML 1+4 at 125° C.) greater than 70.

### Claim 3 (depends on 1)

The composition of claim 1, wherein the interpolymer has a Mooney viscosity (ML 1+4 at 125° C.) less than 300.

### Claim 4 (depends on 1)

The composition of claim 1, wherein the interpolymer has a melt viscosity at 190° C., greater than 2.0×105 Pa·sec.

### Claim 5 (depends on 1)

The composition of claim 1, wherein the interpolymer has a gel content less than 2 weight percent.

### Claim 6 (depends on 1)

The composition of claim 1, wherein the interpolymer has an ethylene content from 45 to 95 weight percent, based on the weight of the interpolymer.

### Claim 7 (depends on 1)

The composition of claim 1, wherein the weight ratio of ethylene to α-olefin in the interpolymer is less than 2.5.

### Claim 8 (depends on 1)

The composition of claim 1, wherein the α-olefin of the interpolymer is propylene.

### Claim 9 (depends on 1)

The composition of claim 1, wherein the diene of the interpolymer is selected from 5-ethylidene-2-norbornene (ENB), dicyclopentadiene or 1,4-hexadiene.

### Claim 10 (depends on 1)

The composition of claim 1, wherein the ethylene/α-olefin/non-conjugated diene interpolymer has a gel content less than 1 weight percent.

### Claim 11 (depends on 1)

The composition of claim 1, wherein the ethylene/α-olefin/non-conjugated diene interpolymer has a gel content less than 0.5 weight percent.

### Claim 12 (depends on 1)

The composition of claim 1, wherein the base ethylene/α-olefin/non-conjugated diene interpolymer has a molecular weight distribution (Mw/Mn) from 1.5 to 2.8, as determined by conventional GPC.

### Claim 13 (depends on 1)

The composition of claim 1, wherein the base ethylene/α-olefin/non-conjugated diene interpolymer has a Mooney viscosity (ML 1+4 at 125° C.) greater than 60.

### Claim 14 (depends on 1)

The composition of claim 1, wherein the composition comprises the following: from 25 to 70 wt % of the ethylene/α-olefin/non-conjugated diene interpolymer; from 25 to 60 wt % of a process oil; from 0 to 60 wt % of carbon black; from 0 to 50 wt % of calcium carbonate and/or other inorganic fillers; from 0 to 7 wt % of a sulfur based cure/vulcanization agents; and from 0 to 7 wt % of a chemical foaming agent; each weight percent based on the total weight of the composition.