Ethylene copolymers with improved melting and glass transition temperature

Patent metadata

Field	Value
Publication number	US-12540206-B2
Application number	US-202118021408-A
Country	US
Kind code	B2
Filing date	Sep 27, 2021
Priority date	Sep 30, 2020
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

Abstract

The present inventions concerns a copolymer of ethylene and an C3 to C8 alpha-olefin, wherein the copolymer has a density of 870 to 890 kg/m 3 measured according to ISO 1183, a MFR 2 of 0.5 to 8.0 g/10 min measured according to ISO 1133, wherein the alpha-olefin is present in the copolymer in an amount of 20 to 35 wt.-%, wherein the copolymer has a first melting temperature T m1 measured according to ISO 11357-3, characterized in that the first melt point T m1 is between 90 and 115° C.

First claim

The invention claimed is:

1 . Copolymer of ethylene and an C3 to C8 alpha-olefin, wherein the copolymer has a density of 870 to 890 kg/m 3 measured according to ISO 1183, a MFR 2 of 0.5 to 8.0 g/10 min measured according to ISO 1133, wherein the alpha-olefin is present in the copolymer in an amount of 20 to 35 wt. %, wherein the copolymer has a first melting temperature T m1 measured according to ISO 11357-3, characterized in that the first melt temperature T m1 is between 9° and 110° C.; and in that the copolymer has a second melting temperature T m2 measured according to ISO 11357-3, wherein the second melting temperature T m2 is between 35 and 55° C.

2 . The copolymer according to claim 1 , wherein the copolymer is a copolymer of ethylene and octene.

3 . The copolymer according to claim 1 , wherein the copolymer has a MFR 2 of 0.7 to 4.0 g/10 min measured according to ISO 1133.

4 . The copolymer according to claim 1 , wherein the copolymer has an MFR 21 of 25 to 50 g/10 min measured according to ISO 1133.

5 . The copolymer according to claim 1 , wherein the copolymer has a ratio MFR 21 /MFR 2 of 25 to 40 measured according to ISO 1133.

6 . The copolymer according to claim 1 , wherein the copolymer has an Mw/Mn of 2.6 to 3.3 determined by Gel Permeation Chromatography.

7 . The copolymer according to claim 1 , wherein the copolymer has an Mw of 85000 to 100000 g/mol determined by Gel Permeation Chromatography.

8 . The copolymer according to claim 1 , wherein the copolymer has a glass transition temperature T g of −45 to −60° C. measured according to ISO 6721-7.

9 . The copolymer according to claim 1 , wherein the copolymer has a vinyl content of 3.5 to 6.5 vinyl groups per 100000 carbon atoms measured with ′H NMR.

10 . The copolymer according to claim 1 , wherein the copolymer has a vinylidene content of 10.0 to 20.0 vinylidene groups per 100000 carbon atoms measured with 1 H NMR.

11 . The copolymer according to claim 1 , wherein the copolymer has a trisubstituted vinylene content of 16.0 to 27.0 trisubstituted vinylene groups per 100000 carbon atoms measured with 1 H NMR.

12 . The copolymer according to claim 1 , wherein the copolymer has a vinylene content of 7.0 to 14.0 vinylene groups per 100000 carbon atoms measured with 1 H NMR.

13 . The copolymer according to claim 1 , wherein the copolymer is obtained by blending a first ethylene copolymer and a second ethylene copolymer, wherein the first ethylene copolymer has a higher density than the second ethylene copolymer.

14 . The copolymer according to claim 13 , wherein a blending ratio of the first ethylene copolymer to the second ethylene copolymer is from 25:75 to 55:45 wt. %.

Assignees

• Borealis Ag
• Borealis Gmbh

Inventors

• Ajellal Noureddine
• Al-Haj Ali Mohammad
• Sleijster Henry
• Verdurmen Edwin M F J
• Defoer Johan
• Ruskeeniemi Jari-Jussi

Classifications

• C08L23/0815 Primary

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

• C08F210/02 Primary

  Ethene · CPC title

• C08F2500/28

  Internal unsaturations · CPC title

• C08F2500/27

  Amount of comonomer in wt% or mol% · CPC title

• C08F2500/32

  Glass transition temperature [Tg] · CPC title