High-performance polyurethane cold storage heat insulation board and preparation method thereof

A polyurethane, high-performance technology, applied in the field of polyurethane boards, can solve the problems of insufficient strength, low closed cell rate, and finer cells, and achieve the effect of high closed cell rate, sufficient foaming, and fine cells

Inactive Publication Date: 2020-04-21
广西鸿匠保温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-performance polyurethane cold storage insulation board and its preparation method, so as to solve the technical problems in the prior art that the foamed cells of the polyurethane board have different fineness, low closed cell rate, and insufficient strength.

Method used

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  • High-performance polyurethane cold storage heat insulation board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of a high-performance polyurethane cold storage insulation board, comprising the following steps:

[0028] S1: Mix the polyurethane, catalyst, and blowing agent evenly and add to the autoclaved pre-expander, after the autoclaved pre-expander is preheated to 100°C, under the steam pressure of 0.2MPa in the autoclaved pre-expansion machine, perform aging for 1h;

[0029] S2: After mixing trientine, foam stabilizer, and nano-silica, preheat at 30°C for 45 minutes, cool to 20°C, mix with mixture A, add to the mixer and stir at 150rpm to obtain mixture B. The mixer is equipped with a circulating water pipe for material preheating;

[0030] S3: Add the rest of the components together with the mixture B into the blender, mix the blender at a speed of 180 rpm, a temperature of 25°C, and a blending time of 6 hours to obtain raw materials;

[0031] S4: Apply a release agent in the mold cavity first, and then perform preheating treatment. The preheating tempe...

Embodiment 2

[0043] A preparation method of a high-performance polyurethane cold storage insulation board, comprising the following steps:

[0044] S1: Mix the polyurethane, catalyst, and blowing agent evenly and add to the autoclaved pre-expander, after the autoclaved pre-expander is preheated to 120°C, under the steam pressure of 0.6MPa in the autoclaved pre-expansion machine, perform aging for 3 hours;

[0045] S2: After mixing trientine, foam stabilizer, and nano-silica, preheat at 60°C for 80 minutes, cool to 20°C, mix with mixture A, add to the mixer and stir at 220rpm to obtain mixture B. The mixer is equipped with a circulating water pipe for material preheating;

[0046] S3: Add the rest of the components together with the mixture B into the mixer, mix the ingredients at the mixer speed of 180 rpm, the temperature of 35°C, and the mixing time of 6 hours to obtain the raw materials;

[0047] S4: Apply a release agent in the mold cavity first, and then perform preheating treatment....

Embodiment 3

[0059] A preparation method of a high-performance polyurethane cold storage insulation board, comprising the following steps:

[0060] S1: Mix the polyurethane, catalyst, and blowing agent evenly and add to the autoclaved pre-expander. After the autoclaved pre-expander is preheated to 113°C, it is matured for 2 hours under the steam pressure of 0.4MPa in the autoclaved pre-expansion machine;

[0061] S2: After mixing trientine, foam stabilizer, and nano-silica, preheat at 45°C for 62 minutes, cool to 20°C, mix with mixture A, add to the mixer and stir at 190rpm to obtain mixture B. The mixer is equipped with a circulating water pipe for material preheating;

[0062] S3: Add the rest of the components together with the mixture B into the mixer, and mix the ingredients at the mixer speed of 180 rpm and the temperature of 29°C for 6 hours to obtain the raw materials;

[0063] S4: Apply a release agent in the mold cavity first, and then perform preheating treatment. The preheatin...

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Abstract

The invention discloses a high-performance polyurethane cold storage heat insulation board and a preparation method thereof, and belongs to the field of polyurethane boards. The heat insulation boardis prepared through the process steps of curing and mixing, foaming, curing, trimming and the like. Processes such as pressurization curing, preheating stirring, autoclaved curing and the like are used, and optimal process parameters are combined, so that the performances of the prepared polyurethane cold storage heat insulation board are effectively improved. Foaming is sufficient and uniform, sothe obtained board is fine in foam holes and high in closed-cell rate, the comprehensive performances of the obtained plate are good, and the polyurethane board is suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of polyurethane boards, in particular to a high-performance polyurethane cold storage insulation board and a preparation method thereof. Background technique [0002] Polyurethane material has a stable porosity structure and is basically a closed-cell structure. It not only has excellent thermal insulation performance, but also has good freeze-thaw resistance and sound absorption. The average lifespan of the rigid polyurethane foam insulation structure can reach more than 30 years under normal use and maintenance conditions. It can be achieved that under normal use conditions during the life of the structure, it will not be damaged under dry, wet or galvanic corrosion, as well as due to external factors such as insects, fungi or algae growth or damage by rodents. [0003] At present, the body panel of the refrigerator and the box panel of the refrigerator are made of polyurethane or polystyrene foam as the core mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L71/00C08K3/36C08J9/14B29D7/00
CPCB29D7/00C08J9/0066C08J9/0071C08J9/141C08J2203/14C08J2375/04C08J2471/00C08K3/36C08K2201/011
Inventor 陈文东何江李翠林
Owner 广西鸿匠保温材料有限公司
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