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Low-thermal-conductivity rigid polyurethane foam taking cyclopentane as main body and manufacturing method and applications thereof

A technology of rigid polyurethane foam and cyclopentane, which is applied in the field of rigid polyurethane foam, can solve the problems of low thermal conductivity and high thermal conductivity, and achieve the effects of low thermal conductivity, reduced thermal conductivity, and reduced foaming

Active Publication Date: 2014-05-21
HISENSE RONSHEN GUANGDONG REFRIGERATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to overcome the deficiencies such as the high thermal conductivity of existing polyurethane rigid foam foam, and provide a kind of polyurethane rigid foam foam with low thermal conductivity

Method used

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  • Low-thermal-conductivity rigid polyurethane foam taking cyclopentane as main body and manufacturing method and applications thereof
  • Low-thermal-conductivity rigid polyurethane foam taking cyclopentane as main body and manufacturing method and applications thereof

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Embodiment Construction

[0069] The present invention will be further described below in conjunction with the examples. These examples are only typical descriptions of the present invention, but the present invention is not limited thereto.

[0070] The raw materials used in the present invention are described as follows:

[0071] Polyether A: sucrose as the initiator, polymerized with oxyalkylene, functionality 8, hydroxyl value 370-415mg / KOH / g;

[0072] Polyether B: sucrose, glycerin as the initiator, polymerized with oxyalkylene, functionality 5~6, hydroxyl value 360~390mg / KOH / g;

[0073] Polyether C: Sorbitol is used as the initiator, polymerized with oxyalkylene, functionality 6, hydroxyl value 480-500mg / KOH / g;

[0074] Polyether D: Methylphenylenediamine as the initiator, polymerized with oxyalkylene, functionality 4, hydroxyl value 400-420mg / KOH / g;

[0075] Polyether E: Ethylenediamine is used as an initiator, and it is polymerized with oxyalkylene, with a functionality of 4 and a hydroxyl v...

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Abstract

The invention discloses a low-thermal-conductivity rigid polyurethane foam taking cyclopentane as a main body and a manufacturing method and applications thereof. The invention relates to the technical field of rigid polyurethane foams, and specifically relates to a rigid polyurethane foam which is prepared from the following raw materials in parts by weight through a hybrid reaction: 135-165 parts of polyisocyanate, 100 parts of polyol composition, 10-16 parts of cyclopentane, 1.8-2.3 parts of catalyst, 1.8-2.5 parts of silicone oil, 1.6-2.4 parts of water, and 1-chlorine-3,3,3-trifluoropropene with a weight accounting for 1-3% of the total weight of the raw materials. The invention also relates to a preparation method of the rigid polyurethane foam and the application of the rigid polyurethane foam in refrigerator and freezer industries. Cells of the rigid polyurethane foam disclosed by the invention are smaller and more uniform, so that the thermal conductivity (minimum: below 0.01800 W / m.K) is greatly reduced, and the strength of the foam is increased; the rigid polyurethane foam reduces the energy consumption and is good in environmental friendliness; the rigid polyurethane foam disclosed by the invention has a positive role in promoting the upgrading and updating of an existing cyclopentane foaming technology for refrigerators.

Description

technical field [0001] The invention relates to the technical field of rigid polyurethane foam, and more specifically, to a rigid polyurethane foam and its preparation method and application. Background technique [0002] C-pentane (cyclopentane) is currently the largest and most popular polyurethane rigid foam foaming agent in the domestic and foreign refrigerator freezer industry. Mature, wide supply and low price, so it has become the preferred blowing agent to replace CFC-11 (monofluorotrichloromethane) and HCFC-141b (monofluorodichloroethane) and is widely used in refrigeration appliances. The field of foaming agents dominates. However, the defects of C-pentane are also very prominent. The main defects are as follows: it is flammable, so ventilation and safety facilities must be built in the production and application process; the foam insulation performance is relatively poor, and the energy consumption of the product is relatively high. , it is difficult to meet the...

Claims

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Application Information

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IPC IPC(8): C08J9/14C08G18/48C08G18/50C08G18/42C08G101/00
Inventor 胡锋曹立军胡哲刘莉
Owner HISENSE RONSHEN GUANGDONG REFRIGERATOR
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