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Phase-changed heat insulation polyolefin foam material and preparation method thereof

A technology of polyolefin foam and polyolefin resin, which is applied in the field of phase change thermal insulation polyolefin foam material and its preparation, to achieve the effect of improving sustainability

Inactive Publication Date: 2013-05-15
TAISHAN SPORTS IND GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the application of phase change materials and microcapsule technology to polyolefin foam materials to improve thermal insulation performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: Preparation of Phase Change Microcapsules

[0041] (1) Mix 40kg of n-tetradecane and 2kg of sodium dodecylbenzene sulfonate, and emulsify into an emulsion in a high-speed emulsifier. The speed of the high-speed emulsifier is 1000r / min, and the emulsification time is 5min;

[0042] (2) Add 20kg of melamine-formaldehyde prepolymer to the emulsion, stir evenly, adjust the pH value to 3.5 with acetic acid, react at 70°C for 0.5h, and stir at a speed of 500 r / min;

[0043] (3) Raise the temperature to 90°C, continue the reaction for 1 hour, and stir at a speed of 500 r / min.

[0044] After steps (1) and (2), phase change microcapsules with n-tetradecane as the capsule core and melamine-formaldehyde resin as the single-layer capsule wall can be prepared; through steps (1) to (3) can be prepared A phase-change microcapsule with n-tetradecane as the core and melamine-formaldehyde resin as the multi-layered wall was produced.

Embodiment 2

[0045] Example 2: Preparation of Phase Change Microcapsules

[0046] (1) Mix 10kg of paraffin wax and 6kg of Tween emulsifier, emulsify into an emulsion under a high-speed emulsifier, the speed of the high-speed emulsifier is 3000r / min, and the emulsification time is 5min;

[0047] (2) Add 60kg of urea-formaldehyde prepolymer into the emulsion, stir evenly, and let it stand for 2 hours. During this period, keep stirring at a stirring speed of 2500 r / min. ;

[0048] (3) Add 1 kg of urea-formaldehyde resin curing agent ammonium chloride, stir evenly, adjust the pH value to 2-3 with acetic acid, react at 80°C for 1 hour, and stir at a speed of 2500 r / min;

[0049] (4) Raise the temperature to 90°C, continue the reaction for 1 hour, and stir at 2500 r / min.

[0050] Phase change microcapsules with paraffin as the core and urea-formaldehyde resin as the single-layer capsule wall can be prepared through steps (1) to (3); Phase-change microcapsules with capsule walls.

Embodiment 3

[0051] Example 3: Preparation of Phase Change Microcapsules

[0052] (1) Take 10kg of gelatin and 25kg of gum arabic, prepare 15% aqueous solutions respectively, and raise the temperature to 55°C;

[0053] (2) Take 30 kg of n-octadecane and 5 kg of sorbitan fatty acid ester, mix them, and emulsify them into an emulsion under a high-speed emulsifier, the speed of the high-speed emulsifier is 1000r / min, and the emulsification time is 5 minutes;

[0054] (3) Add the gelatin solution, adjust the pH value to 4.0 with citric acid, stir evenly, keep the system temperature at 55°C, and react for 2 hours;

[0055] (4) Add the prepared gum arabic melt, adjust the pH value to 3.5 with citric acid, stir evenly, keep the system temperature at 55°C, and react for 5 hours.

[0056] Phase-change microcapsules with n-octadecane as the capsule core and gelatin as the single-layer capsule wall can be prepared through steps (1) to (3); Gum is a phase-change microcapsule with multi-layer capsule...

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PUM

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Abstract

The invention relates to a phase-changed heat insulation polyolefin foam material and a preparation method thereof. The phase-changed heat insulation polyolefin foam material is prepared by carrying out the operations including mixing, melt extrusion, preheating and foaming on raw materials including phase-changed microcapsules, polyolefin resin, a foaming agent, a cross-linking agent, a blowing promoter, a color masterbatch, an antiager and a processing aid. When the temperature is reduced, the phase of the phase-changed material can be changed, heat is released, and thus, the environment temperature is regulated. Meanwhile, a microcapsule technology is adopted, the phase-changed material is used as a capsule core material to be wrapped inside a capsule wall, and thus, the loss of the phase-changed capsule core material from a porous foam material is reduced, and the continuity of a heat insulation effect is improved.

Description

technical field [0001] The invention relates to a thermal insulation material and a preparation method thereof, in particular to a phase-change thermal insulation polyolefin foam material and a preparation method thereof. Background technique [0002] Polyolefin plastics have a wide range of applications, have good physical, chemical and mechanical properties, good toughness, flexibility and cushioning properties, and have properties such as electrical insulation and heat insulation. They are widely used in packaging, chemical industry, construction and other fields. Polyolefin foams are widely used and one of the first foams to be successfully produced. As early as 1941, DuPont of the United States successfully prepared LDPE foam by using the nitrogen method. After decades of development, polyolefin foams have matured and diversified in terms of varieties and applications. With the continuous deepening of theoretical research and the advancement of foaming technology, foa...

Claims

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Application Information

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IPC IPC(8): C08L23/00C08K9/10C08J9/10B01J13/02C09K5/14
Inventor 杨小兵龙国荣卞志勇李秀平李胜业
Owner TAISHAN SPORTS IND GRP
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