Adhesive for packaging material, a packaging material, and a container

Patent metadata

Field	Value
Publication number	US-11063313-B2
Application number	US-201716469279-A
Country	US
Kind code	B2
Filing date	Dec 19, 2017
Priority date	Dec 20, 2016
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

The invention provides a packaging material that has high formability and that does not undergo a decrease in the adhesion strength between layers and appearance defects such as lifting between layers even after thermal fusion between portions of the sealant layer performed for sealing battery elements and furthermore after a long-term durability test under high temperature and high humidity. The adhesive for the packaging material including, as essential components, a polyol composition (A) and a polyisocyanate composition (B), wherein the polyol composition (A) includes a polyester polyol made from, as essential materials, a polybasic acid or its derivative and a polyhydric alcohol, the polybasic acid or its derivative material is all an aromatic-ring-containing polybasic acid or its derivative, and the polyester polyol has a number-average molecular weight in a range of 3000 to 100000; a battery packaging material, a battery container, and a battery that use the adhesive.

First claim

The invention claimed is:

1. An adhesive for a packaging material comprising, as essential components, a polyol composition (A) a polyisocyanate composition (B), and a silane coupling agent,
wherein the polyol composition (A) has a glass transition temperature from −30° C. or more, and 23.6° C. or less and includes a polyester polyol made from, as essential materials, a polybasic acid or its derivative and a polyhydric alcohol, the polybasic acid or its derivative material is all an aromatic-ring-containing polybasic acid or its derivative, and the polyester polyol has a number-average molecular weight in a range of 3000 to 100000,
the content of the silane coupling agent relative to 100 parts by mass of the polyol composition (A) is 0.1 parts by mass or more and 10 parts by mass or less.

2. The adhesive according to claim 1 , wherein the polyhydric alcohol material includes a branched alkylene diol.

3. The adhesive according to claim 2 , wherein a content of the branched alkylene diol relative to 100 mol % of the polyhydric alcohol is 5 mol % or more and 95 mol % or less.

4. The adhesive according to claim 1 , wherein the polyester polyol is made from, as essential materials, the polybasic acid or its derivative, the polyhydric alcohol, and a polyisocyanate.

5. The adhesive according to claim 1 , wherein the polyester polyol is a reaction product of a polyisocyanate and an initial polyester polyol that is made from, as essential materials, the polybasic acid or its derivative and the polyhydric alcohol.

6. The adhesive according to claim 1 , further comprising an adhesion promoter.

7. The adhesive according to claim 1 , further comprising a tackifier.

8. A packaging material comprising at least an outer-layer-side substrate layer, an adhesive layer, a metal layer, and a sealant layer 4 that are stacked in this order, wherein the adhesive layer is a cured product of the adhesive according to claim 1 .

9. A container provided by subjecting the packaging material according to claim 8 to forming.

10. A battery comprising the container according to claim 9 .

11. A battery comprising the adhesive according to claim 1 .

12. The adhesive according to claim 1 , wherein the polyester polyol has a number-average molecular weight in a range of 3000 to 16,000.

Assignees

• Dainippon Ink & Chemicals

Inventors

• MIZUTA Seiji
• Kobayashi Hiroki
• Matsuo Takatoshi
• Nakamura Hidemi
• Mihara Takashi
• Kanno Tsutomu
• Umino Akio
• Takei Hideaki
• Kouyama Tatsuya

Classifications

• H01M50/133

  Thickness · CPC title

• H01M50/186

  characterised by the disposition of the sealing members · CPC title

• H01M50/193

  Organic material · CPC title

• H01M50/129

  with two or more layers of only organic material · CPC title

• H01M50/119

  Metals · CPC title