Ethylene/alpha-olefin/nonconjugated polyene based compositions for thermoplastic vulcanizates

Patent metadata

Field	Value
Publication number	US-10370524-B2
Application number	US-201314411453-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Jun 29, 2012
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

The invention provides a composition comprising at least the following components: A) an ethylene/α-olefin/nonconjugated polyene interpolymer that has the following properties: i) a rheology ratio (V0.1/V100 at 190° C.) greater than, or equal to, 35; ii) a weight average molecular weight (Mw) greater than, or equal to, 200,000 g/mol; and iii) a CCDB (Chemical Composition Distribution Breadth) less than 7; B) a thermoplastic polymer; C) a vulcanization agent; and wherein the interpolymer comprises incorporated oil. The invention also provides a composition comprising the following: A) a first composition comprising: a) a first ethylene/α-olefin/nonconjugated polyene interpolymer; b) a second ethylene/α-olefin/nonconjugated polyene interpolymer; and wherein the first composition has the following properties: i) an MWD less than, or equal to, 3.5, ii) a Mooney Viscosity (ML (1+4, 125° C.)) greater than, or equal to, 60, iii) a CCDB from 7 to 15; B) a thermoplastic polymer; C) a vulcanization agent; and wherein the first interpolymer and the second interpolymer comprise incorporated oil.

First claim

The invention claimed is:

1. A composition comprising at least the following components:
A) an EPDM that has the following properties:
i) a rheology ratio (V0.1/V100 at 190° C.) greater than, or equal to, 35;
ii) a weight average molecular weight (Mw) greater than, or equal to, 200,000 g/mol; and
iii) a CCDB (Chemical Composition Distribution Breadth) less than 7;

B) a thermoplastic polymer;
C) a vulcanization agent; and
wherein the interpolymer comprises incorporated oil; and wherein the interpolymer has a peak area, from 21.3 ppm to 21.8 ppm, that is greater than 3 percent of the total integral area from 19.5 ppm to 22.0 ppm, as determined by 13C NMR.

2. The composition of claim 1 , wherein the EPDM has a Mooney Viscosity greater than, or equal to, 60 (ML 1+4, 125° C.).

3. The composition of claim 1 , wherein the EPDM comprises from 55 to 72 weight percent ethylene, based on the weight of the interpolymer.

4. The composition of claim 1 , wherein the EPDM has a MWD less than, or equal to, 3.5.

5. A composition comprising the following:
A) a first composition comprising:
a) a first EPDM;
b) a second EPDM; and wherein the first composition has the following properties:
i) an MWD less than, or equal to, 3.5,
ii) a Mooney Viscosity (ML (1+4, 125° C.)) greater than, or equal to, 60,
iii) a CCDB from 7 to 15;

B) a thermoplastic polymer;
C) a vulcanization agent; and
wherein the first interpolymer and the second interpolymer comprise incorporated oil; and
wherein the first composition has a rheology ratio (V0.1/V100 at 190° C.) greater than, or equal to, 35; and wherein the first composition has a peak area, from 21.3 ppm to 21.8 ppm, that is greater than 3 percent of the total integral area from 19.5 ppm to 22.0 ppm, as determined by 13C NMR.

6. The composition of claim 5 , wherein the absolute difference in ethylene content between the first interpolymer and the second interpolymer is from 5 to 10 weight percent.

7. The composition of claim 5 , wherein the first composition has a weight average molecular weight (Mw) greater than, or equal to, 200,000 g/mole.

8. The composition of claim 1 , wherein the thermoplastic polymer of Component B is a propylene-based polymer.

9. The composition of claim 1 , wherein the vulcanization agent of Component C is selected from the group consisting of phenolic resins.

10. A crosslinked composition formed from the composition of claim 1 .

11. An article comprising at least one component formed from the composition of claim 1 .

12. The article of claim 11 , wherein the article is selected from the group consisting of profiles, injection molded parts, gaskets, shoe components and tubes.

13. The composition of claim 1 , wherein the EPDM comprises from 55 to 68 weight percent ethylene, based on the weight of the interpolymer.

14. The composition of claim 1 , wherein the EPDM has a peak area, from 21.3 ppm to 21.8 ppm, greater than, or equal to, 8 percent of the total integral area from 19.5 ppm to 22.0 ppm, as determined by 13C NMR.

15. The composition of claim 1 , wherein the EPDM is present in an amount greater than, or equal to, 40 weight percent, based on the weight of the composition, and the thermoplastic polymer is present in an amount less than, or equal to 50 weight percent, based on the weight of the composition.

16. The composition of claim 1 , wherein the EPDM has a peak area, from 21.3 ppm to 21.8 ppm, greater than, or equal to, 5 percent of the total integral area from 19.5 ppm to 22.0 ppm, as determined by 13C NMR.

17. The composition of claim 5 , wherein the first composition has a peak area, from 21.3 ppm to 21.8 ppm, greater than, or equal to, 5 percent of the total integral area from 19.5 ppm to 22.0 ppm, as determined by 13C NMR.

18. The composition of claim 5 , wherein the first composition has a peak area, from 21.3 ppm to 21.8 ppm, greater than, or equal to, 7 percent of the total integral area from 19.5 ppm to 22.0 ppm, as determined by 13C NMR.

Assignees

• Dow Global Technologies Llc

Inventors

• Wu Xiaosong
• Li Pi Shan Colin

Classifications

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title

• C08L91/00

  Compositions of oils, fats or waxes; Compositions of derivatives thereof · CPC title

• Y10T428/139

  Open-ended, self-supporting conduit, cylinder, or tube-type article · CPC title

• C08L23/16 Primary

  Ethylene-propylene or ethylene-propylene-diene copolymers · CPC title

• C08L2205/035

  containing four or more polymers in a blend · CPC title