Ethylene interpolymer products and films

Patent metadata

Field	Value
Publication number	US-11584845-B2
Application number	US-202217701385-A
Country	US
Kind code	B2
Filing date	Mar 22, 2022
Priority date	Nov 7, 2017
Publication date	Feb 21, 2023
Grant date	Feb 21, 2023

Abstract

This disclosure relates to ethylene interpolymer compositions and films prepared therefrom. Specifically: ethylene interpolymer products having: a dimensionless nonlinear rheology network parameter, Δ int. , greater than or equal to 0.01, satisfying 0.01×(Z−50) 0.78 ≤Δ int. ≤0.01×(Z−60) 0.78 inequality wherein Z is a normalized molecular weight defined by
Z = M w M e
where M w and M e are the weight average and entanglement molecular weights, and; a residual catalytic metal of from ≥0.03 to ≤5 ppm of hafnium. The disclosed ethylene interpolymer products have a melt index from about 0.3 to about 500 dg/minute, a density from about 0.855 to about 0.975 g/cc, a polydispersity,

M w M n ,
from about 1.7 to about 25 and a Composition Distribution Breadth Index (CDBI 50 ) from about 1% to about 98%.

First claim

We claim:

1. A film comprising at least one layer comprising an ethylene interpolymer product comprising at least one ethylene interpolymer, wherein said ethylene interpolymer product is characterized by:
a) a network parameter, Δ int. , defined by following inequalities,

0
.
0

⁢
1
×

(

Z
-

5
⁢
0

)

0
.
7

⁢
8

≤

Δ

int
.

≤

0.
1
×

(

Z
-

6
⁢
0

)

0
.
7

⁢
8

⁢

0.01
≤

Δ

i
⁢
n
⁢
t

≤
0.07

wherein Z is a normalized molecular weight defined by

Z
=

M
w

M
e

wherein M w is a weight average molecular weight of the said ethylene interpolymer product as measured using conventional size exclusion chromatography and M e is a molecular weight between entanglements of said ethylene interpolymer as defined by

M
e

=

4
5

⁢

ρ
⁢
R
⁢
T
⁢

m
b
3.49

2
⁢
4
⁢
8
⁢
2
⁢
0

wherein ρ is the melt-state density having a value of 0.780 g/cm 3 at absolute temperature T having a value of 463.15 Kelvin, R is the gas constant having a value of 8.314 J/(mol·Kelvin), M b is the molecular weight per backbone bond calculated in units of g/mol as follows:

m
b

=

n
c

⁢

M

w
/
c

+

2
⁢
8
⁢

(

1
-

n
c

)

2

where n c is the comonomer content in mole fraction determined by Fourier transform infrared (FTIR) spectroscopy according to ASTM D6645-01 (2001) and M w/c is the molecular weight of the comonomer; and
b) a residual catalytic metal of from ≥0.03 to ≤5 ppm of hafnium, wherein said residual catalytic metal is measured using neutron activation.

2. The film of claim 1 comprising at least one layer comprising an ethylene interpolymer product having a dimensionless unsaturation ratio, UR, of from ≥−0.40 to ≤0.06, where UR is defined by the following relationship;

U
⁢
R

=

(

S
⁢

C
U

-

T
U

)

/

T
U

wherein, SC U is the amount of a side chain unsaturation per 100 carbons and T U is amount of a terminal unsaturation per 100 carbons, in said ethylene interpolymer product, as determined by ASTM D3124-98 and ASTM D6248-98.

3. The film of claim 1 , wherein said ethylene interpolymer product is synthesized using a bridged metallocene catalyst formulation comprising a component A defined by Formula (I)

wherein M is a metal selected from titanium, hafnium and zirconium;
G is the element carbon, silicon, germanium, tin or lead;
X represents a halogen atom,
R 6 groups are independently selected from a hydrogen atom, a C 1-20 hydrocarbyl radical, a C 1-20 alkoxy radical or a C 6-10 aryl oxide radical, these radicals may be linear, branched or cyclic or further substituted with halogen atoms, C 1-10 alkyl radicals, C 1-10 alkoxy radicals, C 6-10 aryl or aryloxy radicals;
R 1 represents a hydrogen atom, a C 1-20 hydrocarbyl radical, a C 1-20 alkoxy radical, a C 6-10 aryl oxide radical

Assignees

• Nova Chem Int Sa

Inventors

• Sadeghi Soheil
• Sibtain Fazle
• Zhang Zengrong
• Kazemi Niousha
• Kleczek Monika
• Konaganti Vinod
• Gillon Bronwyn
• Goyal Shivendra
• Kasiri Sepideh
• Salomons Stephen
• Taylor Kenneth
• Keshtkar Mehdi

Classifications

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title

• B32B27/34

  comprising polyamides · CPC title

• C08J2423/14

  Copolymers of propene (C08J2423/16 takes precedence) · CPC title

• C08L23/0815 Primary

  with aliphatic 1-olefins containing one carbon-to-carbon double bond · CPC title

• C08J2323/08

  Copolymers of ethene (C08J2323/16 takes precedence) · CPC title