Laminated film comprising ethylene copolymer

Patent metadata

Field	Value
Publication number	US-2020290331-A1
Application number	US-201716082201-A
Country	US
Kind code	A1
Filing date	Mar 2, 2017
Priority date	Mar 24, 2016
Publication date	Sep 17, 2020
Grant date	—

Abstract

The invention is a polymer composition for film layer comprising less than 50 wt % of a copolymer of ethylene with silane group(s) containing units and at least 50 wt % of a thermoplastic polyolefine free from silane group(s) wherein the polymer composition has creep of less than 1 mm at 90° C., and an adhesion above 20 N/cm. The invention relates to a laminated article with at least one film layer of the polymer composition and a substrate.

First claim

1 . A polymer composition for a film layer comprising:
(A) 10 to 50 wt % of a copolymer of ethylene with silane group(s) containing units, and (B) at least 50 wt % of a thermoplastic polyolefin free from silane group(s), wherein the polymer composition has creep of less than 1 mm at 90° C. during 48 hours, and an adhesion of above 20 N/cm.

2 . The polymer composition according to claim 1 , wherein the copolymer of ethylene (A) with a with silane group(s) containing units is in an amount from 10 to 45 wt %, based on the total weight of the polymer composition.

3 . The polymer composition according to claim 1 , wherein the copolymer of ethylene (A) with silane group(s) containing units has a density above 910 kg/m 3 .

4 . The polymer composition according to claim 1 , wherein the thermoplastic polyolefin free from silane group(s) (B) is present in an amount from 60 to 90 wt %, based on the total weight of the polymer composition.

5 . The polymer composition according to claim 1 , wherein the thermoplastic polyolefin free from silane group(s) (B) is a thermoplastic elastomer polyethylene.

6 . The polymer composition comprising according to claim 1 wherein the total amount of silane group(s) in the polymer composition is less than 1 wt %.

7 . The polymer composition according to claim 1 , wherein the polymer composition has density of from 860 to 910 kg/m 3 and a MFR 2 of 1-10 g/10 min.

8 . The polymer composition according to claim 1 , wherein the polymer composition is free from peroxides.

9 . The polymer composition according to claim 1 , wherein the polymer composition has an UV stabilizer and an antioxidant present in an amount of 0.1 to 5 wt %, based on the total weight of the polymer composition.

10 . The polymer composition according to claim 1 , wherein the polymer composition comprises a condensation catalyst (F).

11 . The polymer composition according to claim 1 , wherein the condensation catalyst (F) is added as:
a master batch; by migration; as a liquid by direct injection into an extruder; or mix the condensation catalyst with the polymer composition and feed the mixture to the extruder.

12 . A film layer made of the polymer composition according to claim 1 .

13 . A laminated article, comprising at least one film layer comprising the polymer composition as defined in claim 1 , comprising a substrate layer and at least one layer wherein the at least one layer comprises a polymer composition.

14 . The laminated article according to claim 13 , wherein the substrate layer is a glass layer.

15 . The laminated article according to claim 13 , wherein the creep is less than 1 mm at 90° C. and an adhesion above 20 N/cm.

16 . The laminated article comprising a polymer composition according to of claim 13 , wherein the polymer composition is laminated at 130° C. to 170° C.

17 . The film layer of claim 12 , comprising:
(A) 10 to 50 wt % of a copolymer of ethylene with silane group(s) containing units, and (B) at least 50 wt % of a thermoplastic polyolefine free from silane group(s).

Assignees

• Borealis Ag

Inventors

• Oderkerk Jeroen
• Broeders Bert
• Sultan Bernt-Ake
• Galgali Girish Suresh
• Hellstrom Stefan
• Bergqvist Mattias
• Verheule Bart
• Akyuz-Karlsson Kristina
• Andreasson Urban
• Costa Francis
• Tran Anh Tuan

Classifications

• C08L2203/16

  used for films · CPC title

• C08L23/0892

  with monomers containing atoms other than carbon, hydrogen or oxygen · CPC title

• C08F2500/21

  Rubbery or elastomeric properties · CPC title

• C08F2500/08

  Low density, i.e. < 0.91 g/cm3 · CPC title

• C08F30/08

  containing silicon · CPC title