IP Library Granted Patent US 9,765,160
Granted Patent B2
US 9,765,160 · App. 15/101,687 · Granted Sep 19, 2017

Tubular low density ethylene-based polymers with improved balance of extractables and melt elasticity

Inventors: Cornelis F. J. Den Doelder (Terneuzen, NL); Otto J. Berbee (Hulst, NL); Stefan Hinrichs (Wondelgem, BE); Teresa P. Karjala (Lake Jackson, TX)
Assignee: DOW GLOBAL TECHNOLOGIES LLC
C08F110/02
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Quick Facts
Patent No.
US 9,765,160
App. No.
15/101,687
Granted
Sep 19, 2017
Kind
B2
Abstract

The invention provides an ethylene-based polymer comprising the following properties: a) weight fraction (w) of molecular weight above 5*10 6 g/mol, w>A−B*I2, where A=0.4 wt %, and B is 0.02 wt %/(dg/min), and w<C−B*I 2 %, where C=0.9 wt %; and b) G′>D−E*log(I2), where D=162 Pa and E=52 Pa/log(dg/min).

Claims (17)

1. An ethylene-based polymer comprising the following properties:

a) weight fraction, as a percentage (w) of molecular weight above 5*10 6 g/mol, w>A−B*I2, where A=0.4 wt %, and B is 0.02 wt %/(dg/min), and w<C−B*I 2 %, where C=0.9 wt %;

b) G′ (at G″ equal to 500 Pa, 170° C.)>D−E*log(I2), where D=162 Pa and E=52 Pa/log(dg/min),

c) a Mw(abs)/Mn(abs) from 17.0 to 24.0; and

d) n-hexane extractables <X wt %+Y*log(I 2 ), where X=2.3 wt % and Y=1.66 wt %/log(dg/min).

2. The ethylene-based polymer of claim 1 , wherein the polymer has a melt index (I 2 ) from 0.3 to 16 dg/min.

3. The polymer of claim 1 , in which the polymer has a n-hexane extractable level less than or equal to 3.5 wt %.

4. The polymer of claim 1 , in which the n-hexane extractables are <X wt %+Y*log(I 2 ), where X=2.3 wt % and Y=1.66 wt %/log(dg/min) when the I 2 is as follows: 0.5 dg/min<I2<12 dg/min.

5. The polymer of claim 1 , in which the ethylene-based polymer has a weight fraction, as a percentage (w) of molecular weight above 5*10 6 g/mol, greater than 0.4 wt % and smaller than 0.7 wt %.

6. The polymer of claim 1 , in which the ethylene-based polymer has a density from 0.916 to 0.925 g/cc.

7. The polymer of claim 1 , in which the ethylene-based polymer has a melt index (I 2 ) from 0.8 to 10 dg/min.

8. The polymer of claim 1 , in which the ethylene-based polymer is a polyethylene homopolymer.

9. The polymer of claim 8 , in which the ethylene-based polymer is LDPE.

10. The polymer of claim 1 , in which the ethylene-based polymer is prepared in a reactor configuration comprising at least one tubular reactor.

11. The polymer of claim 10 , in which the tubular reactor comprises at least three reaction zones.

12. A composition comprising the ethylene-based polymer of claim 1 .

13. An article comprising at least one component formed from the composition of claim 12 .

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 11, 2017
From: DENDOELDER, CORNELIS F.J.; BERBEE, OTTO J.; HINRICHS, STEFAN
To: DOW BENELUX B.V.
Reel/Frame 043269/0382 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 11, 2017
From: DOW BENELUX B.V.
To: DOW GLOBAL TECHNOLOGIES LLC
Reel/Frame 043269/0481 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 11, 2017
From: KARJALA, TERESA P.
To: DOW GLOBAL TECHNOLOGIES LLC
Reel/Frame 043269/0648 →
Continuity (2)
Provisional Application 61918275 · Dec 19, 2013
Related Publication 20160304638A1 · Oct 20, 2016