IP Library Granted Patent US 9,221,975
Granted Patent B2
US 9,221,975 · App. 14/098,592 · Granted Dec 29, 2015

Transparent thermoplastic container

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Quick Facts
Patent No.
US 9,221,975
App. No.
14/098,592
Granted
Dec 29, 2015
Kind
B2
Abstract

Disclosed is a transparent thermoplastic container including a thermoplastic composition including: A) a polyamide resin including a) 10 to 40 mol % of a first repeat unit of formula (I), and b) 60 to 90 mol % of a second repeat unit selected from the group consisting of formula (II) —C(O)(CH 2 ) n C(O)NH(CH 2 ) 6 NH—  (II); wherein n is an integer selected from 8; and the mol % of repeat units are based on the total repeat units present in the copolyamide; and, optionally, B) an aliphatic homopolyamide having one repeat unit selected from the group of formula (II) and C) a functional additive.

Claims (17)

1. A transparent thermoplastic container comprising a thermoplastic composition consisting essentially of:

A) 60 to 100 weight percent of a polyamide resin consisting essentially of

a) 10 to 40 mol % of a first repeat unit of formula (I),

 and

b) 60 to 90 mol % of a second repeat unit selected from the group consisting of formula (II)

—C(O)(CH 2 ) n C(O)NH(CH 2 ) 6 NH—  (II);

wherein n is an integer selected from 8; the mol % of repeat units are based on the total repeat units present in the polyamide resin;

B) 0 to 30 weight percent of an aliphatic homopolyamide having one repeat unit selected from the group of formula (II) and

C) 0 to 10 weight percent of a functional additive;

wherein the weight per cents of A), B) and C) are based on the total weight of the thermoplastic composition.

2. The transparent thermoplastic container of claim 1 wherein 0.4 mm thick test sheets prepared from said thermoplastic composition, conditioned in water maintained at saturated vapor pressure at 121° C. in a sealed autoclave for 20 minutes and allowed to cool to 23° C., have a % haze/mm, as determined according to ASTM D1003 and normalized to 1 mm thickness, of less than 70%/mm.

3. The transparent thermoplastic container of claim 1 wherein 0.4 mm thick test sheets prepared from said thermoplastic composition, have an oxygen transmission rate, as determined with ASTM D3985 test procedure at 23 C/50% relative humidity of 5.0 cm 3 ·mm/m 2 -day-atm or less.

4. The transparent thermoplastic container of claim 1 wherein B) said aliphatic homopolyamide is present at 5 to 30 weight percent.

5. The transparent thermoplastic container of claim 1 wherein C) said functional additive is a nucleating agent and is present 0.1 to 2.0 weight percent.

6. The transparent thermoplastic container of claim 5 wherein said nucleating agent is talc.

7. The transparent thermoplastic container of claim 1 wherein C) said functional additive is absent.

8. The transparent thermoplastic container of claim 1 having an average wall thickness of 0.05 to 2.0 mm.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 26, 2019
From: E. I. DU PONT DE NEMOURS AND COMPANY
To: DUPONT POLYMERS, INC.
Reel/Frame 049590/0650 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 10, 2015
From: DOSHI, SHAILESH RATILAL
To: E.I. DUPONT DE NEMOURS AND COMPANY
Reel/Frame 037083/0724 →