Environment protection type high-efficiency multiple mixing aerating powder for PU rigid foam

A blowing agent, an environmentally friendly technology, applied in the field of blowing agents, can solve problems such as defects, and achieve the effects of stable foam size, energy saving and cost, and excellent aging stability

Active Publication Date: 2009-10-07
HEFEI MIDEA REFRIGERATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various foaming agents have their own characteristics, b

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1: Ternary hybrid foaming system

[0034] According to parts by weight, based on 100 parts of polyether polyol and 130-135 parts of polyisocyanate, the composition of the mixed blowing agent system is:

[0035] 10 parts of cyclopentane, 3.5 parts of HFC-365mfc and 3.5 parts of HFC-245fa

[0036] First put HFC-245fa fully under 10℃ such as ice water or 0℃ cold storage, then take out the liquid and mix it with HFC-365mfc in equal amount, then take out the mixture and mix with cyclopentane in proportion.

[0037] Then weigh the quantitative mixing foaming agent and polyether polyol and stir and mix thoroughly.

[0038] The mixing process of the ternary mixed foaming agent can also be automatically metered through a static mixer. The foaming system can be used for the heat insulation layer of refrigerator / freezer. The foam density is ≤32Kg / M. 3 , Thermal conductivity ≤ 18.5mW / m·K, the energy consumption of refrigerator / freezer is significantly lower than that of single ...

Example Embodiment

[0039] Example 2: Ternary hybrid foaming system

[0040] According to parts by weight, based on 100 parts of polyether polyol and 130-135 parts of polyisocyanate, the composition of the mixed blowing agent system is:

[0041] 11 parts of cyclopentane, 7 parts of HFC-365mfc, FC(C 6 F 14 ) 0.8 copies

[0042] First, HFC-365mfc and FC(C 6 F 14 ) Mix thoroughly, then take out the mixture and mix with cyclopentane in proportion.

[0043] Then weigh the quantitative mixing foaming agent and the polyether polyol, stir and mix thoroughly, and the rest are the same as in Example 1.

Example Embodiment

[0044] Example 3: Ternary hybrid foaming system

[0045] According to parts by weight, based on 100 parts of polyether polyol and 130-135 parts of polyisocyanate, the composition of the mixed blowing agent system is:

[0046] 11 parts of cyclopentane, 4 parts of HFC-365mfc, 3 parts of HFC-356mffm

[0047] First, mix HFC-365mfc with HFC-356mffm and cyclopentane in proportion.

[0048] Then weigh the quantitative mixing foaming agent and the polyether polyol, stir and mix thoroughly, and the rest are the same as in Example 1.

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Abstract

An environment protection type high-efficiency multiple mixing aerating powder for a PU rigid foam is composed of by weight 5-15 shares of HC, 2-20 shares of HFC, and 0-10 shares of adjuvant species; HC is a combination of one or more alkanes and/or cyclanes; HFC is a combination of one or more hydrofluorocarbon; and the adjuvant species is a combination of one or more fluorocarbon hydrocarbons. By means of combining a plurality of aerating powders and the assistance of the adjuvant, it is capable of obtaining a novel mixing foaming system, so as to obtain PU rigid foam with excellent combination property, especially PU rigid foam with excellent heat insulation performance.

Description

technical field [0001] The invention relates to a blowing agent, more specifically a blowing agent used in PU rigid foam plastics. Background technique [0002] PU rigid foam is mainly used in refrigerators, freezers, water heaters, heat pipes and other places that require heat insulation. The materials for preparing PU rigid foam include phenyl polyisocyanate (such as MDI, TDI, etc., commonly known as black material), polyether polyol composite material (commonly known as white material) and foaming agent. [0003] For a density of 35±10Kg / M 3 PU rigid foam, in which the PU matrix only accounts for about 3% of the total volume, while the cells account for about 97% of the total volume. The cells are filled with blowing agent gas or a mixture of blowing agent gas and liquid. The composition and composition of the blowing agent largely determine the thermal insulation and other properties of PU rigid foam. [0004] The environmentally friendly foaming agents currently used...

Claims

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Application Information

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IPC IPC(8): C08J9/14C08L75/04
Inventor 文坚曹家汉王海超任媛媛
Owner HEFEI MIDEA REFRIGERATOR CO LTD
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