METHOD FOR PRODUCING n-PARAFFIN-BASED LATENT HEAT STORAGE MATERIAL COMPOSITION AND MICROCAPSULE HEAT STORAGE MATERIAL

Patent metadata

Field	Value
Publication number	US-2017145277-A1
Application number	US-201515309918-A
Country	US
Kind code	A1
Filing date	May 7, 2015
Priority date	May 9, 2014
Publication date	May 25, 2017
Grant date	—

Abstract

Provided are a latent heat storage material that functions as a high-capacity heat storage material at a medium-to-low temperature region using a latent heat storage material composition including at least one kind of n-paraffin having 14 to 18 carbon atoms in a total amount of 100 parts by mass (hereinafter referred to as “n-paraffin-based latent heat storage material composition”) that contains, as a supercooling preventing agent, an n-alkyl alcohol and/or an n-alkyl amine having 20 to 24 carbon atoms (hereinafter referred to as “n-paraffin derivative”), and is obtained by the following a) step and b) step, a microcapsule heat storage material containing the latent heat storage material as a core material, and a method for producing the same.
a) A step of melting and homogenizing the n-paraffin derivative and the n-paraffin-based latent heat storage material composition at a temperature range of 50 to 100° C. b) A step of cooling the homogeneous solution obtained in the step to precipitate the n-paraffin derivative in the n-paraffin-based latent heat storage material.

First claim

1 . A method for producing a latent heat storage material composition that contains a latent heat storage material including an n-paraffin having 14 to 18 carbon atoms (hereinafter referred to as “n-paraffin-based latent heat storage material”) in a total amount of 100 parts by mass, and an n-alkyl alcohol and/or an n-alkyl amine having 20 to 24 carbon atoms (referred to as “n-paraffin derivative”) in an amount of 0.5 to 5.0 parts by mass as a supercooling preventing agent,
the method comprising:
a) a first step of melting and homogenizing the n-paraffin-based latent heat storage material and the n-paraffin derivative at a temperature range of 50 to 100° C.; and
b) a second step of cooling the homogeneous solution obtained in the first step to precipitate the n-paraffin derivative in the n-paraffin-based latent heat storage material.

2 . A latent heat storage material composition obtained by the production method according to claim 1 .

3 . The latent heat storage material composition according to claim 2 , wherein
the n-paraffin-based latent heat storage material includes 1) 100 to 0 parts by mass of n-octadecane (C18), 2) 0 to 100 parts by mass of n-heptadecane (C17), and 3) 0 to 100 parts by mass of n-hexadecane (C16) (provided that a total amount of 1) to 3) is 100 parts by mass).

4 . The latent heat storage material composition according to claim 2 , wherein
the n-paraffin-based latent heat storage material includes 1) 100 to 0 parts by mass of n-tetradecane (C14), 2) 0 to 100 parts by mass of n-pentadecane (C15), and 3) 0 to 100 parts by mass of n-hexadecane (C16) (provided that a total amount of 1) to 3) is 100 parts by mass).

5 . The latent heat storage material composition according to any one of claims 2 to 4 , wherein the n-paraffin derivative is a linear alcohol and/or a linear amine, each having 22 carbon atoms.

6 . The latent heat storage material composition according to any one of claims 2 to 4 , wherein the amount of the n-paraffin derivative contained in the composition is 0.5 to 2.0 parts by mass.

7 . A microcapsule heat storage material comprising: the latent heat storage material composition according to any one of claims 2 to 4 as a core material; and a vinyl-based monomer cross-linked copolymer as a shell material.

8 . A refrigerant comprising the microcapsule heat storage material according to claim 7 .

9 . A building material comprising the microcapsule heat storage material according to claim 7 .

10 . A refrigerating device comprising the microcapsule heat storage material according to claim 7 .

11 . A latent heat storage material composition comprising:
a latent heat storage material including an n-paraffin having 14 to 18 carbon atoms (hereinafter referred to as “n-paraffin-based latent heat storage material”) in a total amount of 100 parts by mass; and an n-alkyl alcohol and/or an n-alkyl amine having 20 to 24 carbon atoms (referred to as “n-paraffin derivative”) in an amount of 0.5 to 5.0 parts by mass as a supercooling preventing agent.

12 . The latent heat storage material composition according to claim 11 , wherein the n-paraffin derivative is a linear aliphatic alcohol and/or a linear aliphatic amine, each having 22 carbon atoms.

Assignees

• Jx Nippon Oil & Energy Corp

Inventors

• Jin Zhengzhe
• Takashima Tsutomu
• Morinaga Yoshihiro
• Kawaguchi Takahiro

Classifications

• F24F5/0021

  using phase change material [PCM] for storage · CPC title

• C09K5/063 Primary

  Materials absorbing or liberating heat during crystallisation; Heat storage materials · CPC title

• E04B1/76

  specifically with respect to heat only (heat insulation in general F16L59/00) · CPC title

• F28D20/02

  using latent heat · CPC title

• F28D20/023

  the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure · CPC title