Search

CN-122011485-A - Composite foaming agent, composite foaming material, preparation method of composite foaming material and refrigerator

CN122011485ACN 122011485 ACN122011485 ACN 122011485ACN-122011485-A

Abstract

The application discloses a composite foaming agent, a composite foaming material, a preparation method of the composite foaming agent and a refrigerator, and relates to the technical field of foaming materials. The compound foaming agent comprises supercritical fluid, bio-based alkane and bio-based furan derivative. The compound foaming agent provided by the application breaks through a binary system barrier, adopts ternary foaming agent compounding, realizes the synergistic effect of environmental protection and heat preservation performance by virtue of high diffusivity and nucleation capability of supercritical fluid, low heat conduction characteristic of bio-based alkane and compatibility and stabilization effect of bio-based furan derivatives, reduces the solubility parameter difference between the foaming agent system and polyurethane, improves the phase uniformity, optimizes the cell structure, reduces the heat conduction coefficient, and maintains good foaming driving force and phase stability at low temperature.

Inventors

  • WANG HAICHAO
  • ZHOU SIJIAN
  • CAO ZHI
  • ZHANG SHIQIAN
  • LV JIAJIA

Assignees

  • TCL家用电器（合肥）有限公司

Dates

Publication Date
20260512
Application Date
20260127

Claims (10)

  1. 1. A composite foaming agent, which is characterized by comprising a supercritical fluid, a bio-based alkane and a bio-based furan derivative.
  2. 2. The composite blowing agent of claim 1, The supercritical fluid comprises one or more of supercritical carbon dioxide, supercritical nitrous oxide and supercritical propane; the bio-based alkane comprises one or more of bio-based pentane, bio-based hexane and bio-based cyclopentane; The biobased furan derivative comprises one or more of biobased 2-methyl furan, biobased furan and biobased 2-ethyl furan; the mass ratio of the supercritical fluid to the bio-based alkane to the bio-based furan derivative is (5-6): 2-3): 2.
  3. 3. A composite foam comprising a matrix and a composite blowing agent according to any one of claims 1 to 2, said matrix comprising a combination polyether and an isocyanate compound.
  4. 4. The composite foam material of claim 3, The hydroxyl value of the combined polyether is 400-440 mg KOH/g; the viscosity of the combined polyether is 1800 mPas-2000 mPas; the isocyanate compound comprises one or more of isocyanate and diphenylmethane diisocyanate; the isocyanate index in the matrix is 1.1-1.15, The mass ratio of the matrix to the composite foaming agent is 100 (12-16).
  5. 5. The composite foam material according to claim 3, further comprising a composite auxiliary foaming agent, wherein the composite auxiliary foaming agent comprises a polyether modified epoxy compound and a bio-based polyol ester, The molecular weight of the polyether modified epoxy compound is 5000-7000; the polyether modified epoxy compound comprises one or more of polyether modified ethylene oxide and polyether modified propylene oxide; the bio-based polyol ester comprises one or more of castor oil modified polyol ester and soybean oil modified polyol ester; the mass ratio of the matrix to the composite auxiliary foaming agent is 100 (1-2).
  6. 6. The preparation method of the composite foaming material is characterized by comprising the following steps of: providing a matrix comprising a combination polyether and an isocyanate compound; providing the composite foaming agent as defined in any one of claims 1 to 2, mixing with the matrix, and performing foaming treatment to obtain the composite foaming material.
  7. 7. The method according to claim 6, wherein, The supercritical fluid comprises one or more of supercritical carbon dioxide, supercritical nitrous oxide and supercritical propane; the bio-based alkane comprises one or more of bio-based pentane, bio-based hexane and bio-based cyclopentane; The biobased furan derivative comprises one or more of biobased 2-methyl furan, biobased furan and biobased 2-ethyl furan; the isocyanate compound comprises one or more of isocyanate and diphenylmethane diisocyanate; The providing a matrix further includes providing a composite co-blowing agent mixed with the matrix, optionally including a polyether modified epoxy compound and a bio-based polyol ester.
  8. 8. The method of claim 6, wherein the foaming comprises an infiltration stage, a nucleation stage, an expansion stage, and a curing stage, which are sequentially performed, wherein, The pressure of the nucleation phase > the pressure of the expansion phase > the pressure of the curing phase > the pressure of the infiltration phase; the temperature of the solidification phase > the temperature of the nucleation phase > the temperature of the expansion phase > the temperature of the infiltration phase.
  9. 9. The method of claim 8, wherein, The pressure of the soaking stage is 6-8 MPa, the pressure of the nucleation stage is 18-22 MPa, the pressure of the expansion stage is 13-15 MPa, and the pressure of the curing stage is 10-12 MPa; The temperature of the soaking stage is 45-50 ℃, the temperature of the nucleation stage is 65-70 ℃, the temperature of the expansion stage is 62-65 ℃, and the temperature of the curing stage is 75-80 ℃; The time of the soaking stage is 40-50 min, the time of the nucleation stage is 30-35 min, the time of the expansion stage is 25-30 min, and the time of the curing stage is 30-35 min; the decompression rate of the nucleation stage is 0.3-0.5 MPa/min, the decompression rate of the expansion stage is 0.6-0.8 MPa/min, and the decompression rate of the curing stage is 0.3-0.4 MPa/min; In the foaming process, the pressure change rate of two adjacent stages is 0.5 MPa/min-1 MPa/min.
  10. 10. A refrigerator characterized by comprising a case body, an interlayer of which is provided with the composite foam material according to any one of claims 3 to 5, or comprises the composite foam material produced by the production method according to any one of claims 6 to 9.

Description

Composite foaming agent, composite foaming material, preparation method of composite foaming material and refrigerator Technical Field The application relates to the technical field of foaming materials, in particular to a composite foaming agent, a composite foaming material, a preparation method of the composite foaming material and a refrigerator. Background A refrigerator is a refrigerating apparatus that maintains a constant low temperature, and is also a product that maintains food or other objects in a constant low temperature state. The foaming material is a closed-cell rigid foam formed by foaming and solidifying through chemical reaction in an interlayer of a refrigerator body (a shell and an inner container), and has the core function of constructing a continuous and uniform heat insulation layer, so that the transmission of external environment heat to the inside of the refrigerator is reduced to the greatest extent, the low-temperature environment is maintained, and the energy consumption is reduced. The supercritical foaming technology becomes the core direction of the upgrading of the cold chain thermal insulation material, but in the foaming material in the prior art, a triple barrier of a binary system-single regulation-single functional auxiliary agent is not broken through, and the problems that the conventional single foaming system or binary foaming system has insufficient extreme environmental compatibility, poor stability of cells due to lack of cooperative regulation of pressure-temperature-pressure release, incapability of combining strength and weather resistance of a single auxiliary foaming agent and the like are solved. Disclosure of Invention In view of the above, the application provides a composite foaming agent, a composite foaming material, a preparation method thereof and a refrigerator. The embodiment of the application is realized in such a way that the composite foaming agent comprises a supercritical fluid, bio-based alkane and bio-based furan derivative. Optionally, in some embodiments of the application, the supercritical fluid comprises one or more of supercritical carbon dioxide, supercritical nitrous oxide, supercritical propane; the bio-based alkane comprises one or more of bio-based pentane, bio-based hexane and bio-based cyclopentane; The biobased furan derivative comprises one or more of biobased 2-methyl furan, biobased furan and biobased 2-ethyl furan; the mass ratio of the supercritical fluid to the bio-based alkane to the bio-based furan derivative is (5-6): 2-3): 2. Correspondingly, the embodiment of the application also provides a composite foaming material which comprises a matrix and the composite foaming agent, wherein the matrix comprises combined polyether and isocyanate compounds. Optionally, in some embodiments of the application, the hydroxyl number of the combined polyether is 400mg KOH/g to 440mg KOH/g; the viscosity of the combined polyether is 1800 mPas-2000 mPas; the isocyanate compound comprises one or more of isocyanate and diphenylmethane diisocyanate; the isocyanate index in the matrix is 1.1-1.15, The mass ratio of the matrix to the composite foaming agent is 100 (12-16). Optionally, in some embodiments of the present application, a composite co-blowing agent is also included in the composite foam material, the composite co-blowing agent comprising a polyether modified epoxy compound and a bio-based polyol ester, wherein, The molecular weight of the polyether modified epoxy compound is 5000-7000; the polyether modified epoxy compound comprises one or more of polyether modified ethylene oxide and polyether modified propylene oxide; the bio-based polyol ester comprises one or more of castor oil modified polyol ester and soybean oil modified polyol ester; the mass ratio of the matrix to the composite auxiliary foaming agent is 100 (1-2). Correspondingly, the embodiment of the application also provides a preparation method of the composite foaming material, which comprises the following steps: providing a matrix comprising a combination polyether and an isocyanate compound; and mixing the composite foaming agent with the matrix, and performing foaming treatment to obtain the composite foaming material. Optionally, in some embodiments of the application, the supercritical fluid comprises one or more of supercritical carbon dioxide, supercritical nitrous oxide, supercritical propane; the bio-based alkane comprises one or more of bio-based pentane, bio-based hexane and bio-based cyclopentane; The biobased furan derivative comprises one or more of biobased 2-methyl furan, biobased furan and biobased 2-ethyl furan; the isocyanate compound comprises one or more of isocyanate and diphenylmethane diisocyanate; The providing a matrix further includes providing a composite co-blowing agent mixed with the matrix, optionally including a polyether modified epoxy compound and a bio-based polyol ester. Optionally, in some embodiments of the application, t