Ethylene/propylene/nonconjugated diene interpolymer composition

Patent metadata

Field	Value
Publication number	US-12098268-B2
Application number	US-201917607530-A
Country	US
Kind code	B2
Filing date	Apr 30, 2019
Priority date	Apr 30, 2019
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

The present disclosure provides a composition. In an embodiment, the composition includes a neat ethylene/propylene/nonconjugated polyene interpolymer. The neat ethylene/propylene/nonconjugated polyene interpolymer includes from greater than 0 wt % to 6.0 wt % nonconjugated polyene. The neat ethylene/propylene/nonconjugated polyene interpolymer has the following properties: (i) a molecular weight (Mw) from 240,000 to 270,000; (ii) a Mooney viscosity (ML (1+4), 125° C.) from 80 to 85; (iii) a rheology ratio (RR) from 35 to 65; (iv) a Mw/Mn from 2.2 to 3.5; (v) a tan delta ratio from 0.6 to 0.9; and (vi) an absolute tan delta slope from 5.0 to less than 10.0.

First claim

The invention claimed is:

1. A composition comprising:
a neat ethylene/propylene/nonconjugated polyene interpolymer comprising from greater than 0 wt % to 6.0 wt % nonconjugated polyene, the interpolymer having the following properties
(i) a molecular weight (Mw) from 240,000 to 270,000;
(ii) a Mooney viscosity (ML (1+4), 125° C.) from 80 to 85;
(iii) a rheology ratio from 35 to 65;
(iv) a Mw/Mn from 2.2 to 3.5;
(v) a tan delta ratio from 0.6 to 0.9; and
(vi) an absolute tan delta slope from 5.0 to less than 10.0.

2. The composition of claim 1 wherein the neat ethylene/propylene/nonconjucated polyene interpolymer has a Mw/V0.1 ratio less than 1.80 (g/mol).

3. The composition of claim 1 wherein the neat ethylene/propylene/nonconjugated polyene interpolymer is void of a 13 C NMR peak from 34.4 ppm to 34.6 ppm.

4. The composition of claim 1 wherein the neat ethylene/propylene/nonconjugated polyene interpolymer comprises
from 45 wt % to 55 wt % ethylene monomer;
from 40 wt % to 50 wt % propylene comonomer; and
from 3 wt % to 6 wt % 5-ethylidene-2-norbornene termonomer (ENB).

5. The composition of claim 4 wherein the neat ethylene/propylene/nonconjugated polyene interpolymer has the following properties
(i) a molecular weight (Mw) from 240,000 to 260,000;
(ii) a Mooney viscosity (ML (1+4, 125° C.) from 80 to 85;
(iii) a rheology ratio from 35 to 45;
(iv) a Mw/Mn from 3.0 to 3.5;
(v) a tan delta ratio from 0.6 to 0.9;
(vii) is void of a 13C NMR peak from 34.4 ppm to 34.6 ppm; and
(viii) has a Mw/V0.1 ratio from 1.5 to 1.7.

6. The composition of claim 5 wherein the neat ethylene/propylene/nonconjugated polyene interpolymer has a Mw/Mn from 3.2 to 3.5.

7. The composition of claim 6 wherein the neat ethylene/propylene/nonconjugated polyene interpolymer has a tan delta ratio from 0.7 to 0.9.

8. The composition of claim 1 wherein the neat ethylene/propylene/nonconjugated polyene interpolymer comprises is an in-reactor blend of
a first polymer component having a Mw from 375,000 to 400,000; and
a second polymer component.

9. The composition of claim 8 wherein the neat ethylene/propylene/nonconjugated polyene interpolymer comprises
from 30 wt % to 40 wt % of the first polymer component; and
from 70 wt % to 60 wt % of the second polymer component.

10. The composition of claim 1 wherein the neat ethylene/propylene/nonconjugated polyene interpolymer comprises from 1 ppm to 5 ppm hafnium and from 1 ppm to 5 ppm zirconium.

Assignees

• Dow Global Technologies Llc

Inventors

• Wu Xiaosong
• Han Tao
• Li Pi Shan Colin

Classifications

• C08F2500/39

  Tensile storage modulus E'; Shear storage modulus G'; Tensile loss modulus E''; Shear loss modulus G''; Tensile complex modulus E*; Shear complex modulus G* · CPC title

• C08F2500/17

  Viscosity · CPC title

• C08F2500/09

  Long chain branches · CPC title

• C08F2500/03

  Narrow molecular weight distribution, i.e. Mw/Mn < 3 · CPC title

• C08F2/14

  Organic medium · CPC title