# US 5,352,499 A · Multilayered structures comprising polycarbonate layers and functionalized polyamide layer

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- Number: US 5,352,499 A
- Document ID: US5352499A
- Status: Granted
- Kind: A
- Application number: 07/827,855
- Filed: 1992-01-30
- Granted: 1994-10-04
- Earliest claimed: 1989-10-18
- Assignees: General Electric Company
- Inventors: G. Fred Willard
- Web page: https://patentgrep.com/patent/US5352499A

## CPC

- B32B 27/08: of synthetic resin
- B32B 27/34: comprising polyamides
- B32B 27/365: {comprising polycarbonates}
- B32B 2369/00: Polycarbonates
- B32B 2377/00: 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 428/1383: Vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit is sandwiched between layers [continuous layer]
- Y10T 428/1393: Multilayer [continuous layer]
- Y10T 428/31507: Of polycarbonate
- Y10T 428/31725: Of polyamide
- Y10T 428/31736: Next to polyester
- Y10T 428/31739: Nylon type
- Y10T 428/31786: Of polyester [e.g., alkyd, etc.]
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Multilayered structures comprising polycarbonate layers and functionalized polyamide layers exhibit adhesion to each other without the use of a tie layer. The multilayered structures are useful in containers requiring the combined properties of high impact strength and chemical resistance and/or oxygen barrier resistance.

## Claims

### Claim 1

A multilayered bonded laminated structure comprising:
(a) an aromatic polycarbonate resin layer; and
(b) a polyamide resin layer exhibiting gas barrier properties, said polyamide resin comprising the reaction product of:
(i) a dicarboxylic acid,
(ii) a diamine, and
(iii) an effective amount comprising at least about 3 mole percent of (iii) based on total moles of (ii) and (iii) of a polyamine of the general formula: ##STR11## wherein R.sub.6 and R.sub.7 are independently selected from aliphatic, aromatic, and unsaturated hydrocarbons and n is an integer of from 1 to 6, and m is an integer from 1 to 6 said polyamine containing an internal amine group which is less reactive than the terminal amine groups and said polyamine having a concentration greater than approximately 1% of the dicarboxylic acid concentration, based on total moles of dicarboxylic acid, said layers (a) and (b) being in direct adhesive contact with each other without the use of a tie layer therebetween.

### Claim 2 (depends on 1)

The multilayered structures of claim 1 wherein said polyamide layer is at least 1 mil thick.

### Claim 3 (depends on 1)

The multilayered structure of claim 1 wherein said acid is diphenylisophthalate of the formula: ##STR12##

### Claim 4 (depends on 1)

The multilayered structure of claim 1 wherein said diamine is hexamethylenediamine.

### Claim 5 (depends on 1)

The multilayered structure of claim 1 wherein said polyamines are from the group consisting of:
(a) diethylene triamine
(b) 3,3'-iminobispropylamine, and
(c) bis(hexamethylene)triamine.

### Claim 6 (depends on 1)

The multilayered structure of claim 1 wherein said structure is a hollow container.

### Claim 7 (depends on 1)

The multilayered structure of claim 1 wherein said dicarboxylic acid is a mixture of isophthalic and terephthalic acid.