Multilayer injection-molded body

Patent metadata

Field	Value
Publication number	US-9731482-B2
Application number	US-201214128891-A
Country	US
Kind code	B2
Filing date	Jun 19, 2012
Priority date	Jun 27, 2011
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

A multilayer injection molded article containing a layer (X) formed of a resin composition containing a polyamide compound (A) and a resin (B), and a layer (Y) containing a resin (C) as a major component, wherein the polyamide compound (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 molded article, comprising:
a layer (X) formed of a resin composition comprising a polyamide compound (A) and a resin (B); and
a layer (Y) comprising a resin (C) as a major component,
wherein the polyamide compound (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 in total of 50% by mol or more;
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 in total of 50% by mol or more; and
from 0.1 to 50% by mol of a constitutional unit of formula (III):

wherein,
in formula (II-1), n is an integer of from 2 to 18;
in formula (II-2), Ar is an arylene group; and
in formula (III), R is a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group.

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

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

4. The molded article according to claim 1 , wherein the linear aliphatic dicarboxylic acid unit 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 in total of 50% by mol or more.

5. The molded article according to claim 1 , wherein the aromatic dicarboxylic acid unit 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 in total of 50% by mol or more.

6. The molded article according to claim 1 , wherein the polyamide compound (A) further comprises an w-aminocarboxylic acid unit of formula (P) in an amount of from 0.1 to 49.9% by mol based on total constitutional units of the polyamide compound (A):

wherein p is an integer of from 2 to 18.

7. The molded article according to claim 6 , wherein the ω-aminocarboxylic acid unit comprises a 6-aminohexanoic acid unit, a 12-aminododecanoic acid unit, or both, in an amount in total of 50% by mol or more.

8. The molded article according to claim 1 , wherein the resin composition comprises, as the resin (B), at least one selected from the group consisting of a polyolefin, a polyester, a polyamide, an ethylene-vinyl alcohol copolymer, and a plant-derived resin.

9. The molded article according to claim 1 , wherein
the polyamide compound (A) has a relative viscosity of 1.8 or more and 4.2 or less, and
a mass ratio of the polyamide compound (A)/the resin (B) is from 5/95 to 95/5.

10. The molded article according to claim 1 , wherein
the polyamide compound (A) has a relative viscosity of 1.01 or more and less than 1.8, and
a mass ratio of the polyamide compound (A)/the resin (B) is from 5/95 to 50/50.

11. A container obtained by processing the molded article according to claim 1 .

12. The container according to claim 11 , wherein the container is obtained by stretching blow molding.

13. The molded article according to claim 1 , wherein the polyamide compound (A) is a crystalline polyamide compound.

Assignees

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

Inventors

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

Classifications

• B32B27/24

  using solvents or swelling agents · CPC title

• B32B2307/518

  bi-axially · CPC title

• B29C45/1642

  having a "sandwich" structure (B29C45/1603 takes precedence) · CPC title

• B32B27/36

  comprising polyesters · CPC title

• B32B27/08

  of synthetic resin · CPC title