CN-115667599-B - Heat storage composition

Abstract

A heat storage composition comprising a substance a and a polymer 2, the heat storage composition having a melting peak temperature of 10 to 60 ℃ and a melting enthalpy of 10 to 60 ℃ of 30J/g or more, the heat storage composition having no sea-island structure, or the heat storage composition having a sea-island structure, the volume average equivalent circle particle diameter of islands (dispersed phase) being 1.5 μm or less or the area ratio of islands (dispersed phase) being 15% or less.

Inventors

• NOJIRI SAHO
• Ueda Ra
• MATSUI HIROKAZU

Assignees

• 住友化学株式会社

Dates

Publication Date

20260512

Application Date

20210521

Priority Date

20200529

Claims (9)

1. 1. A heat storage composition comprising a substance A and a polymer 2, The heat storage composition has a melting peak temperature of 10 ℃ to 60 ℃ and a melting enthalpy of more than 30J/g of 10 ℃ to 60 ℃, The melting peak temperature of the polymer 2 is 60-86 ℃, The polymer 2 is an ethylene-unsaturated carboxylic acid ester copolymer, The heat storage composition has a sea-island structure, wherein the volume average equivalent circle particle diameter of islands, i.e., a dispersed phase, is 1.5 [ mu ] m or less or the area ratio of islands, i.e., a dispersed phase, is 15% or less, The thermal storage composition has a plurality of melting peak temperatures, at least one of which is in the range of 60 ℃ to 120 ℃.
2. 2. The thermal storage composition of claim 1, wherein the polymer 2 is an ethylene methyl methacrylate copolymer.
3. 3. The heat-accumulative composition of claim 1 having a gel fraction of 15% or less by weight.
4. 4. The thermal storage composition of claim 1, wherein substance a has a molecular weight of more than 2000.
5. 5. A fiber comprising the thermal storage composition of any one of claims 1-4.
6. 6. A heat-accumulating fiber comprising a heat-accumulating composition containing a substance A and a polymer 2, The fiber has a melting peak temperature between 10 ℃ and 60 ℃ and a melting enthalpy between 10 ℃ and 60 ℃ above 5J/g, The melting peak temperature of the polymer 2 is 60-86 ℃, The polymer 2 is an ethylene-unsaturated carboxylic acid ester copolymer, The heat storage composition of the fiber has a sea-island structure, wherein the equivalent circle particle diameter of islands, i.e. dispersed phases, is less than 0.1 mu m or the area ratio of islands, i.e. dispersed phases, is below 15%, The thermal storage fiber has a plurality of melting peak temperatures, at least one of which is in the range of 60 ℃ to 120 ℃.
7. 7. The thermal storage fiber of claim 6, the polymer 2 being an ethylene methyl methacrylate copolymer.
8. 8. The heat-accumulative fiber of claim 6, wherein the composition has a gel fraction of 15% or less by weight.
9. 9. The thermal storage fiber of claim 7 or 8, wherein substance a has a molecular weight of more than 2000.

Description

Heat storage composition Technical Field The present invention relates to a heat storage composition. Background With the recent increase in comfort, fiber products and building materials using various heat functional raw materials have been developed. Patent document 1 describes a heat storage material obtained by kneading polypropylene with a phase change material obtained by reacting an ethylene-methyl acrylate copolymer with n-eicosanol. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2018-188752 Disclosure of Invention Problems to be solved by the invention However, improvement of the heat storage material is demanded from the viewpoints of heat storage property, spinning property, stretchability, hand feeling of fibers, and the like. Accordingly, an object of the present application is to provide a novel composition and fiber excellent in heat storage property. Means for solving the problems The present invention relates to the following, but is not limited thereto. [ Invention 1] A heat storage composition comprising a substance A and a polymer 2, The heat storage composition has a melting peak temperature of 10-60 ℃ and a melting enthalpy of more than 30J/g of 10-60 ℃, The heat storage composition does not have a sea-island structure, or the heat storage composition has a sea-island structure, and the volume average equivalent circle particle diameter of the islands (dispersed phase) is 1.5 μm or less, or the area ratio of the islands (dispersed phase) is 15% or less. [ Invention 2] The heat storage composition according to invention 1, which has a plurality of melting peak temperatures, at least one of which is in the range of 60 to 120 ℃. [ Invention 3] The heat-accumulative composition of any one of the invention 1 or 2 having a gel fraction of 15% by weight or less. [ Invention 4] The heat-accumulative composition of any one of the 1-3, wherein the substance A has a molecular weight exceeding 2000. [ Invention 5] A fiber comprising the heat-accumulative composition of any one of the above 1-4. [ Invention 6] A heat-accumulating fiber comprising a heat-accumulating composition containing a substance A and a polymer 2, The fiber has a melting peak temperature of 10-60 ℃ and a melting enthalpy of more than 5J/g of 10-60 ℃, The heat-accumulative composition of the fiber has no sea-island structure, or the heat-accumulative composition of the fiber has sea-island structure, the equivalent circle particle diameter of the island (dispersed phase) is less than 0.1 μm, or the area ratio of the island (dispersed phase) is 15% or less. [ Invention 7] The heat-accumulative fiber of claim 6 having several melting peak temperatures, at least one of which is 60-120 deg.C. [ Invention 8] The heat-accumulative fiber of the invention 6 or 7, wherein the gel fraction of the heat-accumulative composition in the fiber is 15% by weight or less. [ Invention 9] The heat-accumulative fiber of any one of the invention 6-8, wherein the substance A has a molecular weight exceeding 2000. Effects of the invention The composition of the present invention is excellent in heat storage property. In one embodiment, the composition of the present invention is excellent in shape retention. In one embodiment, the composition of the present invention is excellent in molding processability. In one embodiment, the fibers of the present invention have excellent spinnability and stretchability and good hand. Detailed Description Definition of the definition All numbers disclosed in this specification are approximations, whether or not used in conjunction with the word "about" or "about". They may vary between 1%, 2%, 5% or sometimes 10-20%. Whenever a numerical range with a lower limit R L and an upper limit R U is disclosed, any number within the range is specifically disclosed. In particular, the following numbers within the scope are specifically disclosed. R=r L+k＊(RU-RL) (where k is a variable ranging from 1% -100% in 1% increments, i.e., k is 1%, 2%, 3%, 4%, 5%,..50%, 51%, 52%,..95%, 96%, 97%, 98%, 99% or 100%). Further, an arbitrary numerical range defined by the above-described 2R numbers is specifically disclosed. The expression "lower limit to upper limit" of the numerical range means "lower limit or higher and lower limit or lower", and the expression "upper limit to lower limit" means "upper limit or lower and lower limit or higher". That is, these descriptions represent numerical ranges including a lower limit and an upper limit. Gel fraction Gel fraction (wt%) was obtained by the following procedure. The measurement sample (crosslinked polymer or composition containing the same) was weighed about 500mg and an empty net cage made of a metal net (mesh: 400 mesh). 50mL of a cage in which a measurement sample was sealed and 50mL of xylene (in the example, deer-grade xylene (a mixture of o-xylene, m-xylene, and p-xylene, and ethylbenzene, the total weight of o-xylene, m-xylene,