Laminated multilayer polymer containing film comprising a copolyamide of a diamine, a dimer acid and a lactam

Patent metadata

Field	Value
Publication number	US-11629226-B2
Application number	US-201916980241-A
Country	US
Kind code	B2
Filing date	Mar 6, 2019
Priority date	Mar 13, 2018
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

A laminated multilayer polymer containing film (P) comprises at least one layer comprising at least one copolyamide wherein the copolyamide is prepared by polymerizing the following components: (A) 15% to 84% by weight of at least one lactam, (B) 16% to 85% by weight of a monomer mixture (M) comprising the following components: (B1) at least one C32-C40 dimer acid and (B2) at least one C4-C12 diamine, where the percentages by weight of components (A) and (B) are each based on the sum total of the percentages by weight of components (A) and (B) and wherein the laminated multilayer polymer containing film (P) comprises at least one further layer, where the at least one further layer is selected from the group consisting of (i) at least one further polymer (FP) selected from the group consisting of polyolefins, poly(ethylene-vinyl alcohols), poly(ethylene-vinyl acetates), polyethylene terephthalates, polyvinylidene chlorides, maleic anhydride-grafted polyolefins, polyesters and ionomers and (ii) aluminum metal and/or tin metal.

First claim

The invention claimed is:

1. A laminated multilayer polymer containing film (P) comprising at least one layer, the at least one layer consisting of at least one copolyamide,
wherein the at least one copolyamide is prepared by polymerizing the following components:
(A) 15% to 84% by weight of at least one lactam, and
(B) 16% to 85% by weight of a monomer mixture (M) comprising the following components:
(B1) at least one C 32 -C 40 dimer acid, and
(B2) at least one C 4 -C 12 diamine,

where the percentages by weight of components (A) and (B) are each based on the sum total weight of components (A) and (B), and
wherein the laminated multilayer polymer containing film (P) further comprises at least one further layer, wherein the at least one further layer is at least one selected from the group consisting of
(i) at least one further polymer (FP) selected from the group consisting of polyolefins, poly(ethylene-vinyl alcohols), poly(ethylene-vinyl acetates), polyethylene terephthalates, polyvinylidene chlorides, maleic anhydride-grafted polyolefins, polyesters, and ionomers, and
(ii) aluminum metal and/or tin metal.

2. The laminated multilayer polymer containing film (P) according to claim 1 , wherein component (A) is at least one selected from the group consisting of 3-aminopropanolactam, 4-aminobutanolactam, 5-aminopentanolactam, 6-aminohexanolactam, 7-aminoheptanolactam, 8-aminooctanolactam, 9-aminononanolactam, 10-aminodecanolactam, 11-aminoundecanolactam, and 12-aminododecanolactam.

3. The laminated multilayer polymer containing film (P) according to claim 1 , wherein component (B) comprises in the range from 45 to 55 mol % of component (B1) and in the range from 45 to 55 mol % of component (B2), based in each case on the total molar amount of component (B).

4. The laminated multilayer polymer containing film (P) according to claim 1 , wherein component (B2) is at least one selected from the group consisting of tetramethylenediamine, pentamethylenediamine, hexamethylenediamine, decamethylenediamine, and dodecamethylenediamine.

5. The laminated multilayer polymer containing film (P) according to claim 1 , wherein component (B1) is prepared from at least one unsaturated fatty acid selected from the group consisting of an unsaturated C 16 fatty acid, an unsaturated C 18 fatty acid, and an unsaturated C 20 fatty acid.

6. The laminated multilayer polymer containing film (P) according to claim 1 , wherein the at least one copolyamide has a viscosity number (VN (C) ) in the range from 150 to 300 ml/g, determined in a 0.5% by weight solution of the at least one copolyamide in a mixture of phenol/o-dichlorobenzene having a weight ratio of 1:1.

7. The laminated multilayer polymer containing film (P) according to claim 1 , wherein the at least one copolyamide has a glass transition temperature (T M(C) ), in the range from 20 to 50° C.

8. The laminated multilayer polymer containing film (P) according to claim 1 , wherein the at least one copolyamide has a melting temperature (T M(C) ), in the range from 150 to 210° C.

9. The laminated multilayer polymer containing film (P) according to claim 1 , wherein the at least one further polymer (FP) is selected from the group consisting of polyolefins, poly(ethylene-vinyl acetates), and polyethylene terephthalates.

10. The laminated multilayer polymer containing film (P) according to claim 1 , wherein the least one further layer, comprises
(i) the at least one further polymer (FP) selected from the group consisting of polyolefins, poly(ethylene-vinyl acetates), and polyethylene terephthalates, and
(ii) aluminum and/or tin metal.

11. The laminated multilayer polymer containing film (P) according to claim 1 , comprising at least one outer layer comprising a polyolefin and at least one layer comprising aluminum and/or tin metal.

12. The laminated multilayer polymer containing film (P) according to claim 1 , comprising:
one outer layer consisting essentially of polypropylene,
an adjacent next layer or layers comprising the at least one copolyamide,
a further layer of aluminum adjacent to the adjacent next layer or layers, and
finally adjacent to the further layer of aluminum, a layer of polyethylene terephthalate.

13. The laminated multilayer polymer containing film (P) according to claim 1 , wherein the laminated multilayer polymer containing film (P) is produced by a lamination process of polymer layers which are obtained by at least one process selected from the group consisting of a casting process, a blowing process, and a biaxially orientation process.

14. The laminated multilayer polymer containing film (P) according to claim 1 , wherein the laminated multilayer polymer containing film (P) has a thickness in the range from 0.1 μm to 1 mm.

15. The laminated multilayer polymer containing film (P) according to claim 1 , wherein the at least one copolyamide is a random copolymer.

16. A process for producing a the laminated multilayer polymer containing film (P) according to claim 1 , comprising the steps of
i) preparing at least two films, and
ii) laminating the at least two films,
wherein at least one film in step i) is obtained from a the at least one copolyamide as and the other film or films in step i) is/are obtained from a at least one component selected from the group consisting of
a) at least one further polymer (FP) selected from the group consisting of polyolefins, poly(ethylene-vinyl alcohols), poly(ethylene-vinyl acetates), polyethylene terephthalates, polyvinylidene chlorides, maleic anhydride-grafted polyolefins, polyesters, and ionomers, and
b) aluminum metal and/or tin metal.

17. A packaging film, comprising the laminated multilayer polymer containing film (P) according to claim 1 .

18. A retortable packaging film, comprising the laminated multilayer polymer containing film (P) according to claim 1 ,
wherein the laminated multilayer polymer containing film (P) comprises aluminum.

19. A laminated multilayer polymer containing film (P) consisting of:
(I) at least one layer consisting of at least one copolyamide,
wherein the at least one copolyamide is prepared by polymerizing the following components:
(A) 15% to 84% by weight of at least one lactam, and
(B) 16% to 85% by weight of a monomer mixture (M) comprising the following components:
(B1) at least one C 32 -C 40 dimer acid, and
(B2) at least one C 4 -C 12 diamine,

where the percentages by weight of components (A) and (B) are each based on the sum total weight of components (A) and (B), and
(II) at least one further layer, wherein the at least one further layer is at least one selected from the group consisting of
(i) at least one further polymer (FP) selected from the group consisting of polyolefins, poly(ethylene-vinyl alcohols), poly(ethylene-vinyl acetates), polyethylene terephthalates, polyvinylidene chlorides, maleic anhydride-grafted polyolefins, polyesters, and ionomers, and
(ii) aluminum metal and/or tin metal; and

(III) optionally one or more additives selected from the group consisting of stabilizers, dyes, antistats, tackifiers, anti-blockers, processing auxiliaries, antioxidants, light stabilizers, UV absorbers, lubricants, nucleating aids, and combinations thereof.

20. The laminated multilayer polymer containing film (P) according to claim 19 , wherein the at least one further layer is selected from the group consisting of
(i) at least one further polymer (FP) selected from the group consisting of poly(ethylene-vinyl alcohols), poly(ethylene-vinyl acetate

Assignees

• Basf Se

Inventors

• Noon Eric S
• Costa Joao
• Gale Patrick Stephen
• Doyle Michael Daniel
• Minkwitz Rolf

Classifications

• B32B15/09

  comprising polyesters · CPC title

• B32B2439/70

  Food packaging · CPC title

• B32B37/02

  characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations · CPC title

• C08G2150/00

  Compositions for coatings · CPC title

• B32B2250/04

  4 layers · CPC title