Nano-metal ink and process for producing metal film using same

Patent metadata

Field	Value
Publication number	US-10626280-B2
Application number	US-201615576534-A
Country	US
Kind code	B2
Filing date	May 25, 2016
Priority date	May 27, 2015
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A nanometal ink capable of forming a metal film that exhibits good adhesion to a substrate and has low resistance. The nanometal ink is a baking-type nanometal ink, and contains metal nanoparticles, a polymerizable compound, a polymerization reaction initiator, a volatile liquid medium, and a dispersant. The polymerization reaction initiator is to be activated by the action of heat and/or light, to allow polymerization of the polymerizable compound to proceed. The dispersant includes a C 6-14 alkylamine.

First claim

The invention claimed is:

1. A baking-type nanometal ink, comprising
metal nanoparticles,
a polyermizable compound,
a polymerization reaction initiator,
a polyether compound having a polyoxyalkylene unit,
a volatile liquid medium, and
a dispersant,
the polymerization reaction initiator that is to be activated by action of heat and/or light, to allow polymerization of the polymerizable compound to proceed,
the dispersant including a C 6-14 alkylamine,
wherein the polyether compound contains at least a polyoxytetramethylene unit.

2. The nanometal ink of claim 1 , wherein the dispersant includes a C 8-12 alkylamine.

3. The nanometal ink of claim 1 , wherein the liquid medium is contained in an amount of 25 to 95 mass % in the nanometal ink.

4. The nanometal ink of claim 1 , wherein a total amount of the polymerization reaction initiator and the polymerizable compound is 3 to 50 parts by mass relative to 100 parts by mass of the metal nanoparticles.

5. The nanometal ink of claim 1 , wherein the polymerization reaction initiator is to be activated by action of heat and/or light, to generate a cation.

6. The nanometal ink of claim 1 , wherein
the polymerizable compound is a heat-curable resin, and
the polymerization reaction initiator is a curing agent for curing the heat-curable resin.

7. The nanometal ink of claim 1 , wherein the polymerizable compound is at least one polymerizable compound selected from the group consisting of epoxy resins and vinyl ethers.

8. The nanometal ink of claim 1 , wherein the polymerizable compound is at least one polymerizable compound selected from the group consisting of alicyclic epoxy resins and vinyl ethers.

9. The nanometal ink of claim 1 , wherein the polymerizable compound is at least one polymerizable compound selected from the group consisting of cycloalkene-oxide-based alicyclic epoxy resins and vinyl ethers.

10. The nanometal ink of claim 1 , wherein the polyether compound has a number-average molecular weight of 1000 to 5000.

11. The nanometal ink of claim 1 , wherein the metal nanoparticles have a mean particle diameter of 5 to 500 nm.

12. A metal film production method comprising the steps of:
applying the nanometal ink of claim 1 onto a substrate, to form an applied film; and
baking the applied film, to form a metal film.

Assignees

• Nagase Chemtex Corp

Inventors

• Watanabe Koji
• Ozoe Hiroaki
• Tsujimura Yutaka

Classifications

• C09D11/03

  characterised by features other than the chemical nature of the binder · CPC title

• C09D11/101 Primary

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title

• C09D171/02

  Polyalkylene oxides · CPC title

• H01B1/22

  the conductive material comprising metals or alloys · CPC title

• C09D11/52

  Electrically conductive inks · CPC title