# US 2014/0193596 A1 · Multilayer polymer structure

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- Number: US 2014/0193596 A1
- Document ID: US20140193596A1
- Status: Published application
- Kind: A1
- Application number: 14/179,230
- Filed: 2014-02-12
- Published: 2014-07-10
- Earliest claimed: 2004-11-24
- Assignees: Solvay Advanced Polymer, L.L.C.
- Applicants: Solvay Advanced Polymer, L.L.C.
- Inventors: Corinne BUSHELMAN; James K. Doty; Jean De Canniere; Claude DEHENNAU; Marie-Paule COLLARD
- Web page: https://patentgrep.com/patent/US20140193596A1

## CPC

- B32B 1/00: Layered products having a non-planar shape
- B29C 48/21: the layers being joined at their surfaces
- B32B 1/08: Tubular products
- B32B 27/08: of synthetic resin
- B32B 27/18: characterised by the use of special additives
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/34: comprising polyamides
- B32B 2439/00: Containers; Receptacles
- Y10T 428/1352: Polymer or resin containing [i.e., natural or synthetic]
- Y10T 428/1379: Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
- Y10T 428/3175: Next to addition polymer from unsaturated monomer[s]
- Y10T 428/31757: Polymer of monoethylenically unsaturated hydrocarbon
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Multilayer polymer structure comprising at least one couple of adjacent layers (L1-L2), characterized in that: layer (L1) comprises at least one polymer composition (C1) comprising at least one semi-crystalline polyphthalamide and at least one impact modifier (I1), and layer (L2) comprises at least one polymer composition (C2) comprising at least one functionalized polyolefin (FPO2), said functionalized polyolefin comprising functional groups chosen from carboxylic groups, their esters, their anhydrides and their salts. Process for manufacturing said multilayer structure, which comprises co-extruding polymer compositions (C1) and (C2) so as to obtain couple of adjacent layers (L1-L2). Shaped article comprising the invented multilayer structure and process for manufacturing the shaped article.

## Claims

### Claim 1

A multilayer structure comprising at least one couple of adjacent layers (L1-L2), wherein:
layer (L1) comprises at least one polymer composition (C1) comprising at least one semi-crystalline polyphthalamide having a melting temperature of at least 310° C. and at least 5 wt % of at least one impact modifier (I1), and
layer (L2) comprises at least one polymer composition (C2) comprising at least one functionalized polyolefin (FPO2) having a melting temperature of at least 120° C., said functionalized polyolefin comprising functional groups chosen from carboxylic groups, their esters, their anhydrides and their salts.

### Claim 2 (depends on 1)

The multilayer structure according to claim 1, wherein layer (L1) is more inner than layer (L2).

### Claim 3 (depends on 1)

The multilayer structure according to claim 1, wherein layer (L1) consists essentially of polymer composition (C1).

### Claim 4 (depends on 1)

The multilayer structure according to claim 1, wherein the polyphthalamide is a polyterephthalamide.

### Claim 5 (depends on 1)

The multilayer structure according to claim 1, wherein the polyterephthalamide comprises at least 45 mole % and at most 55 mole % of terephthalamide units based on the total number of moles of recurring units.

### Claim 6 (depends on 1)

The multilayer structure according to claim 1, wherein the polyterephthalamide comprises at least 3 mole % and at most 10 mole % of isophthalamide units based on the total number of moles of recurring units.

### Claim 7 (depends on 1)

The multilayer structure according to claim 1, wherein the polyterephthalamide comprises at least 35 mole % and at most 50 mole % of aliphatic diacid-amide units based on the total number of moles of recurring units.

### Claim 8 (depends on 1)

The multilayer structure according to claim 1, wherein impact modifier (I1) is elastomeric.

### Claim 9 (depends on 1)

The multilayer structure according to claim 1, wherein layer (L2) consists essentially of polymer composition (C2).

### Claim 10 (depends on 1)

The multilayer structure according to claim 1, wherein functionalized polyolefin (FPO2) is obtained by grafting at least one grafting agent (G2) onto at least one unfunctionalized polyolefin (PO2).

### Claim 11 (depends on 10)

The multilayer structure according to claim 10, wherein unfunctionalized polyolefin (PO2) comprises at least 80 wt. % of ethylene recurring units with respect to the total weight of the recurring units.

### Claim 12 (depends on 10)

The multilayer structure according to claim 10, wherein functionalized polyolefin (FPO2) has a melt flow index MI5 of at most 1.0 dg/min.

### Claim 13 (depends on 1)

The multilayer structure according to claim 1, wherein the structure further comprises at least one layer (L3), adjacent to layer (L2), comprising at least one polymer composition (C3) comprising at least one unfunctionalized polyolefin (PO3).

### Claim 14 (depends on 13)

The multilayer structure according to claim 13, wherein the structure is a trilayer structure comprising (L1), (L2) and (L3) as sole layers, in which (L1) can be either the innermost or the outermost layer.

### Claim 15 (depends on 1)

The multilayer structure according to claim 1, wherein the structure further comprises at least one layer (L4), adjacent to layer (L1), comprising at least one polymer composition (C4) comprising at least one aromatic polyamide and at least one impact modifier (I4).

### Claim 16 (depends on 15)

The multilayer structure according to claim 15, wherein the structure is a tetralayer structure comprising, as sole layers, (L4), (L1), (L2) and (L3), in which (L4) can be either the innermost or the outermost layer.

### Claim 17 (depends on 1)

A process for manufacturing the multilayer structure according to claim 1, comprising co-extruding polymer compositions (C1) and (C2) and obtaining a couple (L1-L2) of adjacent layers (L1) and (L2).

### Claim 18 (depends on 1)

A shaped article, comprising the multilayer structure according to claim 1.

### Claim 19 (depends on 18)

The shaped article according to claim 18, wherein the article is a hollow body chosen from the group of pipes, hoses, tubes, containers, fuel tanks and bottles.

### Claim 20 (depends on 18)

A process for manufacturing the shaped article according to claim 18, comprising co-extruding polymer compositions (C1) and (C2) and obtaining a couple (L1-L2) of adjacent layers (L1) and (L2).