Composite body of metal and thermoplastic resin

Patent metadata

Field	Value
Publication number	US-9975317-B2
Application number	US-201414911569-A
Country	US
Kind code	B2
Filing date	Aug 12, 2014
Priority date	Aug 12, 2013
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

Provided is a composite body in which a resin and a metal are contact-bonded with excellent adhesive force. Also provided is a composite body which is suppressed in decrease of bonding strength between a resin and a metal due to water absorption of the resin even if the composite body is left in rain or water, or is left in a high humidity environment or the like for a long period of time. The present invention relates to a composite body which is obtained by contact-bonding a thermoplastic resin (A) and a metal (B), and which is characterized in that the thermoplastic resin (A) is a polyamide elastomer (1A) or a thermoplastic resin composition (2A) that contains a water absorbent thermoplastic resin (2a) and a metal hydroxide (2b).

First claim

The invention claimed is:

1. A composite body obtained by contact-bonding a thermoplastic resin (A) and a metal (B), wherein the thermoplastic resin (A) is a polyamide elastomer (1A) which has a polyamide unit as a hard segment and a polyether unit as a soft segment, the soft segment being an ABA type triblock polyether represented by the following Formula (1),

wherein x denotes 1 to 20, y denotes 4 to 50, and z denotes 1 to 20, and the metal (B) is a surface-treated metal or surface-untreated metal.

2. The composite body according to claim 1 , wherein the polyamide elastomer (1A) is a polyamide elastomer composition containing a polyether amide elastomer and an inorganic filler (1b).

3. The composite body according to claim 2 , wherein the inorganic filler (1b) is at least one member selected from the group consisting of silicate mineral, hydroxide, graphite, and metal oxide.

4. The composite body according to claim 3 , wherein the inorganic filler (1b) is at least one member selected from the group consisting of talc, magnesium hydroxide, graphite, and magnesium oxide.

5. The composite body according to claim 2 , wherein the inorganic filler (1b) is contained in the polyamide elastomer composition in an amount of 0.01 weight % to 50 weight %.

6. The composite body according to claim 2 , wherein the polyamide elastomer composition contains an aminosilane coupling agent.

7. The composite body according to claim 6 , wherein the aminosilane coupling agent is contained in the polyamide elastomer composition in an amount of 0.01 weight % to 1.0 weight %.

8. The composite body according to claim 1 , wherein the thermoplastic resin (A) and the metal (B) are contact-bonded through injection molding.

9. The composite body according to claim 1 , wherein the surface treatment is a treatment for fine uneven surface processing to the surface thereof such that the metal surface is covered by microscopic recesses or hole openings of number-average diameter of 10 to 100 nm, or fixing a chemical substance to the surface thereof.

Assignees

• Ube Industries

Inventors

• Akatsu Hiroki
• Fujimura Hideki
• Sasaki Riyousuke
• Hirayama Shinichi
• Hiroki Tetsurou
• Harada Hideki

Classifications

• B32B2307/728

  Hydrophilic · CPC title

• B29K2705/02

  Aluminium · CPC title

• B29C45/14311

  using means for bonding the coating to the articles (B29C45/14795 takes precedence) · CPC title

• B32B2264/108

  Carbon, e.g. graphite particles · CPC title

• B32B27/20 Primary

  using fillers, pigments, thixotroping agents · CPC title