Multilayer injection-molded body

Patent metadata

Field	Value
Publication number	US-9718259-B2
Application number	US-201214129040-A
Country	US
Kind code	B2
Filing date	Jun 19, 2012
Priority date	Jun 27, 2011
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

A multilayer injection molded article containing a layer (A) containing a polyamide resin (A), and a layer (B) containing a resin (B) as a major component, wherein the polyamide resin (A) contains from 25 to 50% by mol of a diamine unit, which contains a particular diamine unit in an amount of 50% by mol or more; from 25 to 50% by mol of a dicarboxylic acid unit, which contains a particular dicarboxylic acid unit in an amount of 50% by mol or more; and from 0.1 to 50% by mol of a particular constitutional unit.

First claim

The invention claimed is:

1. A multilayer injection molded article, comprising:
a layer (A) comprising a polyamide resin (A), and
a layer (B) comprising a resin (B) as a major component,
wherein the polyamide resin (A) comprises:
from 25 to 50% by mol of a diamine unit, which comprises at least one diamine unit selected from the group consisting of an aromatic diamine unit of formula (I-1), and an alicyclic diamine unit of formula (I-2), in an amount of 50% by mol or more based on a total amount of the diamine unit;
from 25 to 50% by mol of a dicarboxylic acid unit, which comprises a linear aliphatic dicarboxylic acid unit of formula (II-1), an aromatic dicarboxylic acid unit of formula (II-2), or both, in an amount of 50% by mol or more based on a total amount of the dicarboxylic acid unit; and
from 0.1 to 50% by mol of a constitutional unit of formula (III):

wherein
n is an integer of from 2 to 18;
Ar is an arylene group; and
R is a substituted or an unsubstituted alkyl group or a substituted or an unsubstituted aryl group.

2. The multilayer injection molded article according to claim 1 , wherein R in formula (III) is a substituted or an unsubstituted alkyl group comprising from 1 to 6 carbon atoms or a substituted or an unsubstituted aryl group comprising from 6 to 10 carbon atoms.

3. The multilayer injection molded article according to claim 1 , wherein the diamine unit comprises an m-xylylenediamine unit in an amount of 50% by mol or more based on the total amount of the diamine unit.

4. The multilayer injection molded article according to claim 1 , wherein the dicarboxylic acid unit comprises the linear aliphatic dicarboxylic acid unit (II-1), which comprises at least one selected from the group consisting of an adipic acid unit, a sebacic acid unit and a 1,12-dodecanedicarboxylic acid unit, in an amount of 50% by mol or more based on the total amount of the dicarboxylic acid unit.

5. The multilayer injection molded article according to claim 1 , wherein the dicarboxylic acid unit comprises the aromatic dicarboxylic acid unit (II-2), which comprises at least one selected from the group consisting of an isophthalic acid unit, a terephthalic acid unit and a 2,6-naphthalenedicarboxylic acid unit, in an amount of 50% by mol or more based on the total amount of the dicarboxylic acid unit.

6. The multilayer injection molded article according to claim 1 , wherein the polyamide resin (A) further comprises an ω-aminocarboxylic acid unit of formula (X) in an amount of from 0.1 to 49.9% by mol based on a total mols of constitutional units of the polyamide resin (A):

wherein p is an integer of from 2 to 18.

7. The multilayer injection molded article according to claim 6 , wherein the ω-aminocarboxylic acid unit comprises at least one of a 6-aminohexanoic acid unit and a 12-aminododecanoic acid unit in an amount of 50% by mol or more based on a total amount of the ω-aminocarboxylic acid unit.

8. The multilayer injection molded article according to claim 1 , wherein a relative viscosity of the polyamide resin (A) is from 1.8 to 4.2.

9. A container obtained by processing the multilayer injection molded article according to claim 1 .

10. The container according to claim 9 , wherein the container is obtained by stretching blow molding.

11. The multilayer injection molded article according to claim 1 , wherein the polyamide resin (A) is a crystalline polyamide.

Assignees

• Arakawa Shota
• Oda Takafumi
• Otaki Ryoji
• Ishii Kentaro
• Mitsubishi Gas Chemical Co

Inventors

• Arakawa Shota
• Oda Takafumi
• Otaki Ryoji
• Ishii Kentaro

Classifications

• B29C49/08

  Biaxial stretching during blow-moulding · CPC title

• B32B2439/02

  Open containers · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B2307/518

  bi-axially · CPC title

• B32B2250/24

  All layers being polymeric · CPC title