Heat-storage composition

Patent metadata

Field	Value
Publication number	US-10968379-B2
Application number	US-201816212810-A
Country	US
Kind code	B2
Filing date	Dec 7, 2018
Priority date	Jun 22, 2016
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

A heat-storage composition includes a resin and a heat storage material. The composition has a viscosity of 100 to 1,000 dPa·s, as measured with a cylinder-type rotational viscometer. The composition also has a storage elastic modulus (G′) of 3 Pa or more at an angular frequency of 1 rad/s, as measured by a dynamic viscoelasticity measurement method at a temperature of 25° C. and at a strain of 0.1%.

First claim

What is claimed is:

1. A heat-storage composition, comprising:
a resin;
a heat storage material; and
a plasticizer,
wherein the composition has a viscosity of 100 decipascal seconds (dPa·s) to 1,000 dPa·s, as measured with a cylinder-type rotational viscometer, and a storage elastic modulus (G′) of 3 Pa or more at an angular frequency of 1 rad/s, as measured by a dynamic viscoelasticity measurement method at a temperature of 25° C. and at a strain of 0.1%, and
wherein a HSP distance between the heat storage material and the plasticizer is 6 or more and 40 or less.

2. The composition according to claim 1 , wherein the composition has a loss elastic modulus (G″) of 10 Pa or more at an angular frequency of 1 rad/s, as measured by a dynamic viscoelasticity measurement method at a temperature of 25° C. and at a strain of 0.1%.

3. The composition according to claim 1 , wherein the composition has a steady shear viscosity of 30 Pa·s or less.

4. The composition according to claim 1 , wherein the composition comprises 10 to 80% by mass of the heat storage material.

5. The composition according to claim 1 , wherein the resin is a thermoplastic resin.

6. The composition according to claim 1 , wherein 100 parts by mass of the heat storage material absorbs 30 to 150 parts by mass of the plasticizer.

7. The composition according to claim 1 , wherein the plasticizer is an epoxy plasticizer.

8. The composition according to claim 1 , wherein the heat storage material is a plurality of microcapsules,
wherein each of the microcapsules comprises a resin outer shell and a phase change material that is contained within the resin outer shell.

9. The composition according to claim 1 , wherein the heat storage material has a water content of 3% by mass or less.

10. A method for producing a heat storage sheet, the method comprising:
casting a heat-storage composition to forma coating film; and
drying the coating film by heating at a temperature of 150° C. or lower,
wherein the heat-storage composition comprises:
a resin;
a heat storage material; and
a plasticizer,
wherein the heat-storage composition has a viscosity of 100 dPa·s to 1,000 dPa·s, as measured with a cylinder-type rotational viscometer, and a storage elastic modulus (G′) of 3 Pa or more at an angular frequency of 1 rad/s, as measured by a dynamic viscoelasticity measurement method at a temperature of 25° C. and at a strain of 0.1%, and
wherein a HSP distance between the heat storage material and the plasticizer is 6 or more and 40 or less.

11. The method according to claim 10 , wherein the heat storage sheet obtained after drying has a thickness of 1 mm or more.

12. The method according to claim 10 , wherein the heat storage material has a water content of 3% by mass or less.

Assignees

• Dainippon Ink & Chemicals

Inventors

• Koseki Yuko
• Fujisaki Kenichi
• KOIKE Junichirou
• TOYOMURA Kyouichi

Classifications

• C09K5/06

  the change of state being from liquid to solid or vice versa · CPC title

• C08L101/12

  characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity (liquid crystal materials or compositions C09K19/00) · CPC title

• C08K9/10

  Encapsulated ingredients · CPC title

• C08K5/1515 Primary

  Three-membered rings · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title