Polyurethane hard bubble foam and preparation method thereof

A polyurethane rigid foam and polyurethane technology, applied in the field of rigid foam foam and its preparation, can solve the problems of increased power consumption, poor thermal insulation performance, and inability to save electric energy, so as to reduce power consumption and improve thermal insulation performance Effect

Inactive Publication Date: 2007-12-12
HISENSE HOME APPLIANCES GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical application, due to its high price, its function as a blowing agent is only applied in some developed countries (mainly the United States).
At present, most refrigerator and freezer enterprises use C-pentane (cyclopentane) as a blowing agent, but cyclopentane foam foam has a high K (thermal conductivity) value, poor thermal insulation performance, and correspondingly increased power consumption, so it cannot be used to save power

Method used

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  • Polyurethane hard bubble foam and preparation method thereof
  • Polyurethane hard bubble foam and preparation method thereof
  • Polyurethane hard bubble foam and preparation method thereof

Examples

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Embodiment Construction

[0018] The invention discloses a polyurethane rigid foam, comprising polyurethane raw materials, wherein the polyurethane raw materials are C-pentane foaming agent, combined polyether POL and MDI, and adding HFC-245fa and HFC-245fa to the polyurethane raw material (combined polyether) The addition amount is 0.5% to 3% of the total weight of polyurethane raw materials, and HFC-245fa is used as a foaming auxiliary agent, that is, a nucleating agent, in the foaming system.

[0019] Illustrate below with specific embodiment when HFC-245fa joins in polyurethane insulation layer C-pentane (cyclopentane) foaming system as nucleating agent and existing alone with HFC-245fa (1,1,1,3, 3-pentafluoropropane) or C-pentane alone as the difference in blowing agent application:

[0020] Table 1. The amount of HFC-245fa used as a blowing agent and the foam K value are measured as follows:

[0021] component name

POL

MDI

HFC-245fa

HFC-245fa / total weight of raw material...

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Abstract

The invention discloses a kind of hard polyurethane foam and the preparation method. Said polyurethane foam comprises polyurethane raw material, which includes C-pentane foaming agent, combined polyether POL and MDI, the HFC-245fa is added into combined polyether, the adding amount is 0.5- 3% of total weight of raw material. The HFC-245fa is used as core formation agent. The invention is characterized in that it can distinctively and effectively reduce k value of PU foam, increases thermal insulation property and saves energy.

Description

technical field [0001] The invention relates to a rigid foam and a preparation method thereof, in particular to a polyurethane rigid foam using HFC-245fa and a preparation method thereof. Background technique [0002] In the prior art, HFC-245fa (1, 1, 1, 3, 3-pentafluoropropane) has been commercialized for several years, and it is known that it has many function. In practical application, due to its high price, its function as a blowing agent is only applied in some developed countries (mainly the United States). At present, most refrigerator and freezer enterprises use C-pentane (cyclopentane) as a blowing agent, but cyclopentane foam foam has a high K (thermal conductivity) value, poor thermal insulation performance, and correspondingly increased power consumption, so it cannot be used to save power. Contents of the invention [0003] The object of the present invention is to overcome the deficiencies of the prior art and provide a polyurethane rigid foam. The foamin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08K5/02C08G101/00
Inventor 胡锋游飞越吴振焘曹家汉胡哲
Owner HISENSE HOME APPLIANCES GRP CO LTD
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