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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, but any single use of any foaming agent will have defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: Ternary mixed foaming system

[0034] In 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] Cyclopentane 10 parts, HFC-365mfc 3.5 parts and HFC-245fa 3.5 parts

[0036] First place HFC-245fa in ice water below 10°C or in a freezer at 0°C, then take out the liquid and mix it with HFC-365mfc in an equal amount, then take out the mixture in proportion and mix it with cyclopentane.

[0037] Then take quantitative mixing blowing agent and polyether polyol and fully stir and mix.

[0038] The mixing process of the three-way mixed foaming agent can also be automatically metered by a static mixer. The foaming system can be used for the polyurethane rigid foam of the heat insulation layer of the refrigerator / freezer, and the foam density is ≤32Kg / M 3 , thermal conductivity ≤18.5mW / m·K, the energy consumption of refrigerators / freezers is significantly lower th...

Embodiment 2

[0039] Embodiment 2: ternary mixed foaming system

[0040] In 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 parts

[0042] First combine HFC-365mfc with FC(C 6 f 14 ) is fully mixed, and then the mixture is taken out in proportion and mixed with cyclopentane.

[0043] Then take quantitative mixing blowing agent and polyether polyol and fully stir and mix, and all the other are the same as Example 1.

Embodiment 3

[0044] Embodiment 3: ternary mixed foaming system

[0045] In 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] Cyclopentane 11 parts, HFC-365mfc 4 parts, HFC-356mffm 3 parts

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

[0048] Then take quantitative mixing blowing agent and polyether polyol and fully stir and mix, and all the other are the same as 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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